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Quantum and Evolution Series Installation and Operating Handbook

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Modem Error Probability versus Eb/No - Sequential Decoding at 64kbps

Содержание Evolution Series

Страница 1: ...venhall End 328 Innovation Blvd Witham Essex CM8 3HA England State College PA 16803 U S A Tel 44 0 1376 515636 Tel 1 814 238 3450 Fax 44 0 1376 533764 Fax 1 814 238 3829 http www paradisedata com Copyright 2005 2011 Teledyne Paradise Datacom Ltd All rights reserved Installation and Operating Handbook for Quantum and Evolution Series Satellite Modems ...

Страница 2: ...1 10 Getting Started 5 1 1 11 Power Up 5 1 Chapter 6 Introduction 6 1 1 12 Overview 6 1 1 13 Hardware Options 6 2 1 13 1 IDR Option Card 6 2 1 13 2 G 703 Option Card 6 2 1 13 3 LVDS Option Card 6 2 1 13 4 HSSI Option Card 6 2 1 13 5 Quad E1 Option Card 6 2 1 13 6 Eurocom D1 Option Card 6 3 1 13 7 IP Traffic Option Card 6 3 1 13 8 Optional L band BUC Power Supplies 6 4 1 13 9 L band FSK DC Option C...

Страница 3: ...7 172 1 20 14 IP Static Routes 7 175 1 20 15 Header Compression 7 176 1 20 16 Fetching Web Pages from a Remote Modem 7 178 1 20 17 Adaptive Signal Pre distorter 7 178 Chapter 8 Modem Concepts 8 1 1 21 Doppler Plesiochronous Buffering and Clocking 8 1 1 21 1 Transmit Clocking 8 2 1 21 2 Receive Clocking 8 4 1 21 3 Guidelines for Clocking Configuration 8 6 1 22 Framing and Drop Insert Overview 8 10 ...

Страница 4: ...t ABIS 8 62 1 36 FastLink Low latency LDPC 8 65 1 37 LinkGuard Interference Detection 8 67 Chapter 9 Remote Control Protocol 9 1 Chapter 10 Data Interfaces 10 1 Chapter 11 Connector Pinouts 11 1 Chapter 12 Fault Messages 12 1 1 38 Transmit Faults 12 2 1 39 Transmit Warnings 12 4 1 40 Receive Faults 12 5 1 41 Receive Warnings 12 7 1 42 Unit Faults 12 9 1 43 Unit Warnings 12 10 1 44 Start up problem...

Страница 5: ...Specifications 13 10 1 57 Data Rate Specifications 13 10 1 58 Traffic Log Specifications 13 12 1 59 Common Specifications 13 12 1 60 Internet Traffic 13 13 1 61 BUC LNB facilities 13 13 1 62 Performance Graphs 13 14 Chapter 14 Advanced Framing 14 1 Chapter 15 Glossary 15 1 Chapter 16 Customer Technical Support 16 1 ...

Страница 6: ...ds DVB S2 can be used in one of two ways Firstly DVB S2 can be used as a service in its own right e g the modem could be used to provide a DVB S2 outbound service combined with an SCPC inbound service Any combination of SCPC and DVB S2 Tx and Rx services are possible including both being SCPC or both being DVB S2 Secondly SCPC features can be overlaid onto DVB S2 space segment to provide all the f...

Страница 7: ...ite Modems Paradise Datacom Evolution Series PD55 L band Satellite Modems Paradise Datacom Quantum Series PD20 IF Satellite Modems Paradise Datacom Quantum Series PD20 L band Satellite Modems Paradise Datacom Quantum Series PD60 IF Satellite Modems Paradise Datacom Quantum Series PD60 L band Satellite Modems Redundancy Switch operation is documented separately see Installation and Operating Handbo...

Страница 8: ...e information in this handbook this cannot be guaranteed and the information contained herein does not constitute a product warranty A product warranty statement is provided separately to this handbook Paradise Datacom maintains a programme of continuous product improvement and reserves the right to change specifications without prior notice 1 4 GNU General Public License This product contains sof...

Страница 9: ...te the safety compliancy Please contact Customer Technical Support for further advice Operation of the equipment in an environment other than that stated in the specifications will also invalidate the safety compliancy The equipment must not be operated in an environment in which the unit is exposed to Unpressurised altitudes greater than 2000 metres Extremes of temperature outside the stated oper...

Страница 10: ...r voltage installation The positioning of the equipment must be such that the mains supply socket outlet for the equipment should be near the equipment and easily accessible or there should be another suitable means of disconnection from the mains supply The equipment is designed to operate from a TN type power supply system as specified in EN 60950 1 i e a system that has separate earth line and ...

Страница 11: ...available hardware options To ensure that the modem maintains compliance with electromagnetic compatibility standards please observe the following points The equipment must be operated with its cover on at all times If it is necessary to remove the cover for any reason then you must ensure that the cover is correctly refitted before normal operation For the baseband data interfaces all D type conn...

Страница 12: ...cooling should be provided This must include leaving adequate clearance around the ventilation holes on the sides and the fan on the back panel Connect the appropriate cables to the Transmit IF and Receive IF connectors at the rear of the unit Output power level can be controlled using the front panel menus The optimum input level for the demodulator is 45dBm 15dB 1 11 Power Up Power the unit and ...

Страница 13: ... A full range of terrestrial interfaces including RS422 V 35 RS232 Synchronous and Asynchronous LVDS HSSI Ethernet Internet Protocol IP and G 703 T1 E1 T2 E2 and T3 E3 There is also a G 703 variant that multiplexes and demultiplexes four E1 interfaces and can be used in a MultiMux configuration which multiplexes serial data G 703 and IP traffic A multiple E1 Sat Abis interface is available for dir...

Страница 14: ...03 card fits inside the modem leaving both interface positions 1 and 2 free and makes use of either the EIA530 connector in interface position 1 or 2 for balanced signals or BNC connectors interface position 3 for unbalanced signals 1 13 3 LVDS Option Card The LVDS option card part number P3001 provides LVDS on a D25 female connector The LVDS card fits in interface position 2 lower at the rear of ...

Страница 15: ...option card The P300 compatible Eurocom D1 option card part number P3709 provides a Eurocom D interface data rates of 16 to 2048kbps AMI coding Eurocom G interface at 16 or 32kbps on a 25 pin D male connector The Eurocom D1 EIA530 option card part number P3713 provides Eurocom D interface data rates of 16 to 2048kbps Eurocom G interface at 16 or 32kbps as well as EIA530 signals on the same connect...

Страница 16: ...sses TCP and UDP packet payloads by typically 50 It must be used with TCP acceleration and or header compression Note that the IP Traffic card is dedicated to processing IP satellite traffic only remote IP based M C including SNMP and access to the modem web server continue to be supported via the base modem RJ45 M C connector only Note also that all Evolution Quantum satellite modems support a du...

Страница 17: ...3531 Terrasat 10W C band IBUC 24V 108 4 5A P3536 48V 96 2A P3535 Terrasat 4W Ku band IBUC 24V 72 3A P3532 48V 72 1 5A P3531 Terrasat 8W Ku band IBUC 24V 120 5A P3536 48V 120 2 5A P3535 NJR 1W C band 5665 5666 24V 30W P3532 NJR 2W C band 5667 5668 24V 37 5W P3532 NJR 5W C band 5669 5670 24V 55W P3532 NJR 10W C band 5662 5663 24V 130W P3536 48V 130W P3535 NJR 1W Ku band 5015 24V 25W P3532 NJR 1W Ku ...

Страница 18: ...referred to in relation to the modem user interfaces technical datasheets etc Note that the following are provided as standard in the modem Tx Rx DR0 DR1 IRS VIT WIF AUPC HCP and ESC Feature SAF Code Description Transmit TX Controls access to the Tx service required for any transmission to occur Receive RX Controls access to the Rx service required for any receive processing to occur Terrestrial d...

Страница 19: ... Rate TPCH Enables selection of the TPC FEC scheme at all terrestrial data rates Advanced ESC ESC Enables selection of the high rate asynchronous ESC channel in IBS SMS mode and asynchronous ESC access to the IDR 8kbps synchronous ESC channel as well as enabling selection of Closed network plus ESC mode Advanced Aux AUX Enables the replacement of one or both IDR 32kbps ADPCM audio channels with Au...

Страница 20: ...ion of TCP data over satellite This level of acceleration is available only with the IP Traffic option card TCP acceleration to 55Mbps Evolution PD55 or 60Mbps Quantum PD60 TCP55 Enables a Performance Enhancing Proxy that provides acceleration of TCP data over satellite This level of acceleration is available only with the IP Traffic option card Quad E1 option card second E1 port 2E1 Enables the s...

Страница 21: ... a maximum data rate of 5Mbps LDPC FEC LDP10 Deprecated replaced by FastLink LDPC Enables conventional LDPC FEC scheme to a maximum data rate of 10Mbps LDPC FEC LDP25 Deprecated replaced by FastLink LDPC Enables conventional LDPC FEC scheme to a maximum data rate of 25Mbps LDPC FEC LDP55 Deprecated replaced by FastLink LDPC Enables conventional LDPC FEC scheme to a maximum data rate of 55Mbps Evol...

Страница 22: ...ables Paired Carrier data rates in the given range inclusive Paired Carrier data rate 5Mbps to 10Mbps PCME Enables Paired Carrier data rates in the given range inclusive Paired Carrier data rate 10Mbps to 15Mbps PCMF Enables Paired Carrier data rates in the given range inclusive Paired Carrier data rate 15Mbps to 20Mbps PCMG Enables Paired Carrier data rates in the given range inclusive Paired Car...

Страница 23: ...nclusive FastLink LDPC data rate 10Mbps to 20Mbps FL5 Enables FastLink low latency LDPC data rates in the given range inclusive FastLink LDPC data rate 20Mbps to 25Mbps FL6 Enables FastLink low latency LDPC data rates in the given range inclusive FastLink LDPC data rate 25Mbps to 55Mbps Evolution PD55 or 60Mbps Quantum PD60 FL7 Enables FastLink low latency LDPC data rates in the given range inclus...

Страница 24: ...bps Quantum PD20 or 25Mbps Evolution PD25 to 60Mbps Quantum PD60 or 55Mbps Evolution PD55 ACM5 Enables DVB S2 ACM feature in Tx to the specified data rate DVB S2 ACM data rate 60Mbps to 100Mbps ACM6 Enables DVB S2 ACM feature in Tx to the specified data rate DVB S2 ACM data rate 100Mbps to 155Mbps ACM7 Enables DVB S2 ACM feature in Tx to the specified data rate Adaptive equalizer RADEQ Receive ada...

Страница 25: ... used Unit OK Rx Traffic Rx fault or Rx disabled Not used Not used Rx OK Tx Traffic Tx fault or Tx disabled Not used Not used Tx OK Test Mode Normal mode Not used Test mode Not used Tx Carrier Carrier muted Not used 1 for 1 standby Carrier active Front Panel LED Status 1 15 2 LCD Display The backlit LCD is a graphical display formatted to give three lines of 40 text characters and is highly legibl...

Страница 26: ... locked Help screen Numeric entry mode 123 Alphabetic entry mode Abc Modem is on a Tx Edit screen Tx Modem is on an Rx Edit screen Rx Front Panel LCD Icons 1 15 2 1 Keypad The keypad see the diagram below is based on a sealed tactile membrane and allows full alphanumeric entry and navigation using arrow keys Front Panel Keypad ...

Страница 27: ... live and neutral lines Access to the fuses is provided by a slide out tray Both fuses are standard 20mm type rated T3 15A of the slow blow time delay type ALWAYS REPLACE THE FUSE WITH ONE OF THE SAME TYPE AND RATING Chassis Ground Stud This is an M4 stud for connecting a safety earth conductor directly to the chassis of the unit Tx IF Output Option This connector is a BNC female and can be used i...

Страница 28: ...C Aux access on this async connector is disabled This connector also provides the input port for an RS422 compatible Station Clock On line LED This LED mirrors the front panel Tx Carrier LED so that from the rear of the equipment the operator can tell if the carrier is off and which unit of a 1 1 pair is the offline unit Terrestrial Interface Connectors There are two terrestrial interface connecto...

Страница 29: ...s asynchronous Aux traffic This port replaces the shared ESC Aux access via the Async ESC connector on the main unit The Aux port provides 32 or 64kbps access to the IDR overhead in place of one or both of the IDR 32kbps ADPCM audio ESC channels In IBS SMS this port may be configured to provide either the IBS low rate INTELSAT oversampled ESC facility or a higher rate synchronous channel within th...

Страница 30: ...if preferred It is also possible to change the configuration so that the M C port is removed from the bridge which may benefit security in some circumstances where it is important to separate the M C and IP traffic streams An M C IP address subnet mask and default gateway may be set in the modem When using TCP acceleration and the M C interface does not form part of the Ethernet bridge then a traf...

Страница 31: ...e following sections 1 17 1 Local Mode On shipping from the factory the modem defaults to Local mode which allows control of the modem from the front panel interface only Web users can however log in and view the modem settings while the modem is in Local mode Note that SNMP is disabled by default and therefore cannot be used as an alternative method of remote control until it is enabled When SNMP...

Страница 32: ... panel interface control will time out in a similar way to remote admin users and thereby control may be taken away again by a remote admin user During the period between an admin user logging out and either another admin login or a command being issued via the local front panel interface to gain control no user is in control of the modem Although there is no explicit login associated with the loc...

Страница 33: ... arrow key moves the cursor to the left On a menu this is used to navigate between menu options When entering an alphanumeric value it moves the cursor to the preceding digit The Left arrow key has a special function when viewing the system log where it is used to move backwards in the log by 100 entries The Right arrow key moves the cursor to the right On a menu this is used to navigate between m...

Страница 34: ...e M C control s function Pressing the 0 key and Left arrow key together for a second time removes the Help text and reverts the display back to its previous contents Keyboard Lock The keypad can be locked against inadvertent use by holding down the 0 key and pressing the MAIN key together at the same time Pressing the two keys again at the same time unlocks the keypad LCD Contrast The contrast of ...

Страница 35: ...SAF and the appropriate SAF code has not been enabled Please contact Paradise Sales who can issue a SAF key to unlock the feature Alternatively all SAF features can be enabled for a limited time as described in Section 8 5 The feature is advanced and the user level setting is basic This is a mechanism that has been added to simplify the user interface by hiding options that are less frequently use...

Страница 36: ...ad only configurable property values Test Controls the selection of test modes Common This provides quick access with fewer key presses to the most commonly used user settings once a modem has been set up for the first time and the link has been established carrier mute power levels frequencies data rates modulation and FEC rates Since all of these options are described elsewhere in this document ...

Страница 37: ...Quantum and Evolution Series Installation and Operating Handbook 7 7 1 19 2 Status Menu Front Panel Status Menus ...

Страница 38: ...mit path fault then the message Tx OK since HH MM SS on DD MM YY is displayed where HH indicates hours MM indicates minutes SS indicates seconds DD indicates the day of the month MM indicates the month of the year and YY indicates the year When a transmit path fault exists then a fault message is displayed instead that indicates the nature of the fault When there is no receive path fault then the ...

Страница 39: ...he following information The receive path Eb No figure energy per bit to spectral noise density ratio This is replaced by Es No energy per symbol to spectral noise density ratio when the Down arrow is selected The receive path final bit error rate BER Please note that this figure gives only a crude indication of BER linked directly to the Eb No measurement In most instances the actual BER is signi...

Страница 40: ...ced by setting the Paired Carrier minimum and maximum satellite delays accordingly it is recommended that these are set to the measured delay 0 5ms respectively via the Edit Rx Carrier Advanced PCMA menu Status ACM Screen This screen is constantly updated with the following information some of which potentially change dynamically when ACM is active The remote modem s Es No energy per symbol to spe...

Страница 41: ...s Centigrade reported by the BUC Type this field shows the BUC power class in Watts and the BUC current level in Amperes Status Misc Screen The Status Misc menu contains the status of miscellaneous modem features split over several screens as described below Note that the 1 for N screen is not available unless the modem is the standby modem in a 1 for N redundancy switch The 1 for N redundancy swi...

Страница 42: ... measured by the remote modem while AUPC is enabled Target this is the target Eb No level set for the remote modem Delta power this is the instantaneous offset that has been applied to the modem Tx power output level to maintain the remote Eb No at a constant level Selecting the Down arrow displays the following screen This screen shows the following information Limits this shows the AUPC positive...

Страница 43: ...ntifier on the bottom line of the screen Selecting the Down arrow displays the following screen This screen shows the receive path Es No figure energy per symbol to spectral noise density ratio in large font for easy viewing It shows the user settable Modem Identifier on the bottom line of the screen Selecting the Down arrow displays the following screen This screen shows the receive path final bi...

Страница 44: ...Installation and Operating Handbook 7 14 This screen shows the receive signal power level in large font for easy viewing It shows the user settable Modem Identifier on the bottom line of the screen Rx power 38dBm ID London New York ...

Страница 45: ...he modem Tx properties to be changed Rx This option selects the receive path edit submenu which allows all of the modem Rx properties to be changed Unit This selects the unit edit submenu This allows all of the modem properties that are independent of the Tx and Rx paths to be changed Memories This option selects the configuration memory submenu which allows the modem configuration to be saved or ...

Страница 46: ...Quantum and Evolution Series Installation and Operating Handbook 7 16 1 19 3 1 Edit Tx Menu Front Panel Edit Tx Menus ...

Страница 47: ... frequency power spectrum inversion and AUPC Automatic Power Up link Control to be controlled 1 19 3 1 1Edit Tx Service Screen Options Off The Tx service is switched off Closed network This mode adds no overhead to the data and is compatible with other closed network equipment It is provided as part of the base modem Closed network plus ESC This adds the lowest possible overhead to the satellite d...

Страница 48: ...d with all SCPC features such as Drop and Insert IBS ESC channel etc disabled Note that there are two ways of enabling DVB S2 and this particular option should be used only for IP which through the use of standard IP over DVB encapsulation methods is interoperable at a basic level with other manufacturer s DVB S2 equipment DVB S2 interoperability with other vendors is not supported when using othe...

Страница 49: ... provided including DVB S2 outbound with SCPC return SCPC both outbound and inbound DVB S2 both outbound and inbound etc SmartLink mode see the Edit Tx FEC Inner FEC screen allows SCPC features such as Drop and Insert and the ESC channel to be overlaid on top of DVB S2 thereby allowing legacy applications to benefit from the bandwidth saving efficiencies and extra robustness of DVB S2 ...

Страница 50: ... configuration of framing timeslots and overhead Edit Tx Baseband Mode Screen Options Continuous This selects normal continuous data interface operation Drop MUX This requires the Drop and Insert SAF features to be enabled It processes a T1 or E1 PCM bearer with Tx data being dropped from specific timeslots of the bearer on the Rx side data can be inserted back into the same timeslots or into diff...

Страница 51: ...e datasheet for particular modem model Step size 1 Factory default 2048000 Description Terrestrial bit rate This is used in Continuous mode but is automatically set in other baseband modes The upper data rate limit is set according to which SAF data rates have been enabled and is model specific Note that the full data range is not available in every mode of operation and may be restricted by other...

Страница 52: ... user level is set to Advanced see the Edit Unit Advanced User Level screen this menu allows configuration of framing timeslots and overhead Note that the Advanced Baseband menu including support for framing timeslots and overhead is described separately in Chapter 14 Advanced 1 Framing 2 Timeslots 3 Overhead ...

Страница 53: ...s normally generated from the internal frequency reference Alternatively a station clock of 10MHz can be applied to the unit and used to synchronise all internal clocks and IF synthesisers which normally use the internal reference Receive reference The Tx clock is generated from the Rx output clock This is only of any practical use when the Rx clock is set to Satellite or Station clock Station The...

Страница 54: ... enabled then the following menu will be is displayed at this point This allows the G703 clock to be forwarded over satellite as a clock reference see Section 8 8 for further details Options OFF E1 T1 Factory default OFF Description This provides a high stability clock over satellite derived from a G 703 card that can be used for clocking any interface in place of GPS Use G 703 as clock reference ...

Страница 55: ...PC 16QAM Requires 16QAM SAF feature Applicable to TPC and FastLink LDPC 8QAM Requires 8QAM SAF feature Applicable to FastLink LDPC 16APSK Requires 16APSK SAF feature Applicable to FastLink LDPC DVB S2 16APSK does not require this SAF 32APSK Requires 32APSK SAF feature Applicable to FastLink LDPC 64QAM Requires 64QAM SAF feature Applicable to FastLink LDPC Factory default QPSK Description Selects t...

Страница 56: ...ner FEC settings for the modem Outer This submenu controls the Outer Reed Solomon FEC settings for the modem Edit Tx FEC Inner Menu This menu contains the following options FEC This selects the Inner FEC type Rate This selects the FEC rate The next table defines normal operation with respect to FEC mode FEC rate and modulation scheme FEC 1 Inner 2 Outer Inner 1 FEC 2 Rate ...

Страница 57: ...nal LDPC 2 3 QPSK 8PSK Conventional LDPC 3 4 QPSK 8PSK 16QAM DVB S2 Quantum only 1 3 2 5 QPSK DVB S2 Quantum only 3 5 QPSK 8PSK DVB S2 Quantum only 2 3 4 5 5 6 8 9 9 10 QPSK 8PSK 16APSK FastLink LDPC 0 499 BPSK FastLink LDPC 0 532 0 639 0 710 0 798 O QPSK FastLink LDPC 0 639 0 710 0 778 8PSK 8QAM FastLink LDPC 0 726 0 778 0 828 0 851 16APSK 16QAM FastLink LDPC 0 778 0 886 0 886 0 938 32APSK FastLi...

Страница 58: ...l AUPC IDR audio channels etc SmartLink allows ALL modem features that rely on SCPC framing including IBS SMS IDR Closed Network plus ESC etc to be used in conjunction with DVB S2 allowing legacy SCPC applications to immediately benefit from bandwidth savings and the increased robustentess of DVB S2 while providing exactly the same services as before If DVB S2 is required but no SCPC features are ...

Страница 59: ...pplication In many if not all applications FastLink should be able to replace TPC or conventional LDPC Note that FastLink does not suffer from the error floor flaring problem of earlier generation LDPC FECs and consequently does not require the use of any outer codec to enhance performance Factory default Viterbi Description Controls the inner FEC mode Note that the FEC off option is no longer ava...

Страница 60: ...only 1 2 Viterbi Sequential DVB S2 SmartLink only 3 5 DVB S2 SmartLink only 2 3 TCM only 0 666 2 3 Paradise TPC only 3 4 Viterbi Sequential DVB S2 SmartLink only 75 3 4 de facto TPC only 4 5 DVB S2 SmartLink only 0 789 Paradise TPC only 5 6 DVB S2 SmartLink only 7 8 Viterbi Sequential 0 875 7 8 de facto ...

Страница 61: ...PC only 0 875 7 8 Paradise TPC only 8 9 DVB S2 SmartLink only 9 10 DVB S2 SmartLink only 0 929 Paradise TPC only 0 499 FastLink only 0 532 FastLink only 0 639 FastLink only 0 710 FastLink only 0 726 FastLink only 0 778 FastLink only 0 798 FastLink only 0 828 FastLink only ...

Страница 62: ...s In DVB S2 IP multistreaming mode then there will be one FEC rate screen shown for each stream as each can be set independently Not all FEC rates are available for all modulations and FEC schemes please check the Table of Normal Operation with respect to FEC Mode FEC Rate and Modulation Scheme shown in the Edit Tx FEC Inner Menu section Note Paradise TPC rate 7 8 was developed to give better perf...

Страница 63: ...ens for each stream Options Short Selects a DVB S2 frame size of 16200 bits Normal Selects a DVB S2 frame size of 64800 bits Factory default Short Description Sets the DVB S2 FEC frame size Edit Tx FEC Pilots Screen The following screen may be shown at this point after the FEC has been selected in DVB S2 IP multistreaming mode then there will be one of these screens for each stream Options Off FEC...

Страница 64: ... schemes in noisy environments They add an overhead of around 2 5 to the transmitted data Edit Tx FEC FastLink Optimisation Mode Screen The following screen will be shown at this point after the FEC has been selected if FastLink has been selected Options Balanced Provides performance that is a good balance between low latency and good BER performance It is the best compromise between trying to ach...

Страница 65: ...the other of these or set to be a balance between both This flexibility allows FastLink to be used in place of both TPC and conventional LDPC Edit Tx FEC Outer Menu This menu contains the following options RS mode This controls whether the Reed Solomon outer FEC encoder is active Advanced This submenu allows custom values of n k and interleaver depth to be set Reed Solomon FEC is a powerful scheme...

Страница 66: ...cification of the code rate there is a parameter called interleaving depth which controls the number of Reed Solomon codewords that are interleaved Interleaving is used to mix up the blocks such that a burst of channel errors is distributed over a number of codewords rather than affecting a lot of bytes from a single block thus improving the resilience to error bursts Interleaving is usually of de...

Страница 67: ...o n 20 in steps of 2 Interleave This is used to set the Reed Solomon interleaver depth which controls resilience to burst errors larger depth gives best BER through data dispersal at the expense of introducing processing delay The table below defines normal Reed Solomon operation Normal RS Service FEC Terrestrial Data Rate Type n k t Depth Off x x x x x Closed IBS SMS IDR Closed ESC OM73 TCM 1544k...

Страница 68: ...rd length i e k data symbols n k parity symbols where n k 2 symbol errors per codeword can be corrected Edit Tx FEC Outer Advanced RSK Data Length Screen Units symbols Minimum value 40 Maximum value 253 Step size 2 Factory default 112 Description Number of data symbols per Reed Solomon codeword range n 2 to n 20 in steps of 2 RS n value 60 to 255symbols 126 Step 1 symbols New 126 RS k value 40 to ...

Страница 69: ... Menu This menu contains the following options Enable This is the master control for all scramblers It can be used to switch scrambling off or on When on the choice of scrambler can be made automatically by the modem or selected manually Type This option selects the type of scrambler to apply when manual control of the scrambler type is active i e when automatic selection is switched off The follo...

Страница 70: ...nd RS mode is Off OM 73 Turbo default if FEC mode is TPC available only if FEC mode is TPC Closed Network Plus ESC IBS SMS default if terrestrial data rate is 32000 and RS mode is Off Intelsat RS default if RS mode is On V 35 OM 73 Turbo available only if FEC mode is TPC OM 73 OM 73 Table of Valid Scrambler Options in Normal Operation Edit Tx Scrambler Enable Screen Options Off Normal Other Factor...

Страница 71: ...he errors degrading performance Turbo Only available in when the TPC FEC is selected OM 73 Intelsat Reed Solomon Only available when the Reed Solomon FEC is selected Factory default V 35 Description Controls the type of scrambler to apply Only available when scrambler selection is set to Other Edit Tx Scrambler Type V 35 Screen Options Intelsat normal Scrambler type V 35 New V 35 V 35 scrambler ty...

Страница 72: ...ellite Inversion This controls whether the I and Q channel outputs are swapped to give Spectrum Inversion Roll off This controls the slope gradient of the carrier at its edges and therefore controls the occupied bandwidth Advanced This submenu provides AUPC Automatic Up link Power Control BUC Type selection and BUC control menus AUPC attempts to maintain the remote Eb No at a specified target leve...

Страница 73: ...select Ack Pwr Bre following a power outage Rx enabled When enabled then the carrier will be switched off whenever an Rx traffic fault is present in the modem RTS enabled When RTS is enabled then the carrier is controlled by the interface RTS line Factory default Off Description Tx carrier control Edit Tx Carrier Power Screen IF Modem Units dBm Minimum value 25 0 Maximum value 0 Step size 0 1 Fact...

Страница 74: ...x L band output power level Edit Tx Carrier Frequency Screen IF Modem Units MHz Minimum value 50 0000 Maximum value 180 0000 Step size 0 0001 Factory default 70 0000 Description Tx IF frequency used to transmit to satellite Note that values between 90 and 100MHz cannot be selected RF output power 30 to 0dBm 10 0 Step 0 1dBm New 10 0 IF carrier freq 50 to 90 100 to 180MHz 070 0000 Step 100Hz New 07...

Страница 75: ... 950 0000 Description Tx L band frequency used to transmit to satellite Edit Tx Carrier Inversion Screen Factory default Off Description Controls whether the I and Q channel outputs are swapped Edit Tx Carrier Roll off Screen Options 35 This selects a filter roll off factor of 35 IF carrier freq 950 to 2050MHz 950 0000 Step 100Hz New 950 0000 Rx spectral inversion On 1 Off 2 On Filter roll off 35 ...

Страница 76: ...s the following options Mode This controls the ability to attempt to maintain the remote Eb No at a specified target level by varying the local modem transmit power level Target Eb No This is used to set a target Eb No for the distant modem that this modem tries to maintain by adjusting the transmit power level Power offset This sets the maximum increase in transmit power level that can be made to...

Страница 77: ...e remote modem then the modem in question will not respond to requests to provide Eb No information See Section 8 3 for a full description of AUPC Edit Tx Carrier Advanced AUPC Method Screen Options Normal This should be selected when two Quantum Evolution modems are at either ends of the satellite link Self In this mode the modem will adjust power output in an attempt to maintain the Eb No at its...

Страница 78: ...returns to its nominal power Freeze at current value The carrier power is frozen at its current value Set to max The AUPC delta power increases to the maximum power limit as set on the AUPC Max positive delta power screen Factory default Set to Nominal Description This controls the AUPC delta power action in the event of losing the incoming carrier In most cases this should be set to Nominal Carri...

Страница 79: ...distant Eb No that AUPC tries to maintain by adjusting the Tx power level Edit Tx Carrier Advanced AUPC Power Offset Screen Units dBm Minimum value 0 Maximum value 25 Step size 0 1 Factory default 1 Description This is the maximum increase in Tx power level that AUPC is allowed to make to maintain distant Eb No Target remote EbNo 0 1 to 14 9dB 3 1 Step 0 1dB New 3 1 Max power offset 0 to 25dBm 1 0...

Страница 80: ...power or EIRP measured in dBm or dBW BUC type Allows the type of BUC to be selected from a list of supported BUCs with the option of either open loop control Independent mode or closed loop control Terminal mode In closed loop mode the modem attempts to maintain a constant BUC output power by adjusting the modem output power and BUC attenuation level PSU If the modem is fitted with an internal DC ...

Страница 81: ... dBm dBw Minimum value 99 Maximum value 99 Step size 0 1dB Factory default 0 Description This screen allows the modem to display and the user to edit the final SHF power instead of the IF carrier level Use the up down arrows to change the sign Once set the user is navigated to the Tx power units selection screen Edit Tx Carrier Advanced BUC Power Units Screen This allows the user to set the modem ...

Страница 82: ...s to RFT5000 LO frequency 15450 MHz User FSK enabled but user must set LO frequency of BUC C5 85 6 725 GHz CODU Uses RS485 comms to CO unit LO frequency 4900MHz Ku 14 14 5 GHz CODU Uses RS485 comms to CO unit LO frequency 13050MHz Ext Ku 13 75 14 5 GHz CODU Uses RS485 comms to CO unit LO frequency 12800MHz RFT5000 C Uses RS485 comms to RFT5000 LO frequency 4900 MHz C 5 8 6 425 GHz VSAT Only availa...

Страница 83: ...n other than None is selected then the user is taken to the following Terminal Mode screen Edit Tx Carrier Advanced BUC Terminal Mode Screen This allows the user to select either open loop control Independent mode or closed loop control Terminal mode In closed loop mode the modem attempts to maintain a constant BUC output power by adjusting the modem output power and BUC attenuation level In open ...

Страница 84: ...option to manually set the frequency shift is not presented Edit Tx Carrier Advanced BUC Power Screen Units W Minimum value 0 Maximum value 999 Step size 1W Factory default 0 000 Description This screen tells the modem what the BUC power class is However this can be ignored unless a CO has been selected with a power output greater than 170W Edit Tx Carrier Advanced BUC DC Supply Screen This screen...

Страница 85: ...modem up the coaxial site cable to the BUC Edit Tx Carrier Advanced BUC Output Screen This switches the BUC Tx carrier on and off independently of the modem s Tx carrier on off control This may be useful where one BUC carries several carriers passively combined but with one modem providing DC 10MHz Ref FSK and you wish to mute all the carriers Edit Tx Carrier Advanced BUC Attenuation Screen 10MHz ...

Страница 86: ...output from the modem could saturate the BUC input unless the attenuator early in the BUC gain profile is set suitably high If in doubt always start with the minimum modem Tx carrier level and the maximum BUC attenuation Edit Tx Carrier Advanced BUC 1 for 1 Screen This controls whether BUC services i e DC supply and 10MHz reference stay with the on line modem or switch to the standby modem when a ...

Страница 87: ...Quantum and Evolution Series Installation and Operating Handbook 7 57 1 19 3 2 Edit Rx Menu Front Panel Edit Rx Menus ...

Страница 88: ...m inversion to be controlled Rx Tx This option allows the receive path to be automatically configured to be the same as the transmit path thereby simplifying set up There are a number of exceptions including carrier frequency spectral inversion timeslots and clocks 1 19 3 2 1Edit Rx Service Screen See the description of the transmit path equivalent including follow on screens for FastLink optimiza...

Страница 89: ...s the origination of a terrestrial bearer from the Insert MUX G732 sig This option controls whether CAS information is processed and routed through the satellite T1 sig This specifies whether Robbed Bit Signalling RBS information is present in the traffic source ABCD This determines the action to be taken with respect to the Rx CAS ABCD signalling block in relation to satellite backward alarms Edi...

Страница 90: ...ption of the transmit path equivalent Edit Rx Baseband Advanced Framing T1 RBS Screen See the description of the transmit path equivalent Edit Rx Baseband Advanced Framing CAS Action on Backward Alarm Screen Options Signalling bits abcd normal Signalling bits abcd AIS Signalling bit b 1 acd normal Signalling bits ab 1 cd normal Factory default Signalling bits abcd normal Description Determines act...

Страница 91: ...her part or all of the received data is to be inserted into the terrestrial bearer Partial TS When Partial Insert is active this controls which timeslots from the satellite are inserted into the terrestrial bearer Edit Rx Baseband Advanced Timeslots Number Used Screen See the description of the transmit path equivalent Edit Rx Baseband Advanced Timeslots Timeslots Screen See the description of the...

Страница 92: ...Insert is active controls whether the timeslot from the satellite is to be inserted into the terrestrial bearer Edit Rx Baseband Advanced Overhead Menu See the description of the transmit path equivalent Edit Rx Clocks Menu This menu contains the following options Source This selects the receive path clock source Buffer This option sets the buffer capacity for received data This provides Doppler a...

Страница 93: ...h end of the link and any Doppler shift whilst providing the required interval between buffer slips Internal The internal reference clock is used to clock data to the terrestrial port This requires the receive buffer to be set as per the Tx Clock In option Station If the station clock frequency is the same as the Rx data rate then the station clock is used directly If the station clock is a differ...

Страница 94: ... stability clock over satellite derived from a G 703 card that can be used for clocking any interface in place of GPS 1 19 3 2 4Edit Rx Clocks Buffer Screen Units ms Minimum value 0 Maximum value 99 Step size 1 Factory default 8 Description Buffer capacity for received data This is used when the Rx clock is not set to Satellite Should the capacity be exceeded unflow or overflow and the buffer slip...

Страница 95: ...buffer to be recentred manually Edit Rx Clocks Advanced Auto Centre Screen Factory default On Description Controls whether the Rx buffer is centred following an Rx path recovery from failure This should be disabled where minor outages occur where the errors or synchronisation losses caused by centring the buffer are potentially larger than those caused by the outage Advanced 1 Auto centre 2 Manual...

Страница 96: ...dvanced This controls an Rx adaptive equalizer for the FastLink FEC which compensates for transponder group delay It also controls a holdoff time for demodulator loss of lock used to prevent spurious loss of lock being reported when the Rx antenna is briefly obscured Edit Rx Demodulation Screen See the description of the transmit path equivalent The table shown under Edit Tx FEC Inner defines norm...

Страница 97: ... at very low data rates by setting a sweep width that is smaller than the default Factory default Normal Description Controls the Rx signal sweep configuration Edit Rx Demodulation Sweep Width Screen Units kHz Minimum value 1 Maximum value 250 Step size 1 Factory default 32 Description Controls the Rx signal sweep width when the Sweep mode is set to Other This is a setting i e the total width is t...

Страница 98: ...to regain the carrier more quickly than would otherwise be the case Equaliser This menu controls a 9 tap adaptive equaliser for FastLink note that DVB S2 has a built in equalizer that is used automatically all the time Typically about 15 of the bandwidth on transponders at the band edges is subject to signal distortion called group delay This causes inter symbol interference due to filters on the ...

Страница 99: ...enu See the description of the transmit path equivalent Edit Rx FEC Outer RS Mode Screen See the description of the transmit path equivalent Edit Rx FEC Outer RS Type Screen See the description of the transmit path equivalent Edit Rx FEC Outer Advanced Menu See the description of the transmit path equivalent See the Edit Tx FEC Outer Advanced description for a table of Reed Solomon N K and Interle...

Страница 100: ...tion of the transmit path equivalent 1 19 3 2 8Edit Rx Carrier Menu This menu has the following options Frequency This sets the IF frequency used to receive from the satellite Inversion This controls whether the I and Q channel outputs are swapped Roll off This controls the expected slope gradient of the received carrier at its edges this affects the occupied bandwidth Advanced This controls the P...

Страница 101: ...s allows selection of the LNB type that is fitted It also allows the modem to display and the user to edit the final SHF frequencies instead of the normal L band frequencies PSU This allows the DC supply to the LNB from the modem to be turned on or off Reference This controls whether a 10MHz reference signal is supplied to the LNB from the modem 1 for 1 This controls whether LNB services i e DC su...

Страница 102: ...cy 11300MHz Factory default None Description Allows the user to select a number of Paradise LNBs or Other if another manufacturer s LNB is being used If Other is selected then the following LNB frequency offset screen is displayed Note the Std C LNB uses a high side Local Oscillator LO and the received SHF frequency is LO IF frequency not LO IF as with most other bands This is academic as it is ha...

Страница 103: ...em to display a low side LO High side LO is and Low side LO is Move the cursor over the sign and use the up down arrows to change Edit Rx Carrier Advanced LNB PSU Menu The L band modem can supply either 15V or 24V at 500mA to the LNB up the coaxial site cable or line powered The options available are Off 15V 24V and Multiswitch Note that the Multiswitch option selects the Global Communications LNB...

Страница 104: ...em up the coaxial site cable to the LNB Edit Rx Carrier Advanced LNB 1 1 Screen This controls whether LNB services i e DC supply and 10MHz reference stay with the on line modem or switch to the standby modem when a 1 for 1 switchover occurs in a 1 for 1 redundant pair of modems Note that FSK communications will always be switched over 10MHz reference Off 1 Off 2 On Mute Services in Standby Off 1 O...

Страница 105: ...Carrier off and on Access to this menu option requires the Paired Carrier feature to have been previously enabled through the modem SAF mechanism For first time use please see the Paired Carrier deployment recommendations in the information box overleaf When switched on the modem expects the received signal to consist of two overlapped carriers utilizing the same space segment When on a copy of th...

Страница 106: ... or reconfigured just like any other modem feature You must get each link working correctly as a normal link prior to switching Paired Carrier on You must ensure that there is no spectral inversion in the RF chain if there is then this must be corrected by re inverting it for Paired Carrier operation to work see the above table 1 Ensure Paired Carrier is switched off Main 2 Edit 3 Rx 7 Carrier 4 A...

Страница 107: ...nable Paired Carrier in the first modem Main 2 Edit 3 Rx 7 Carrier 4 Advanced 2 PCMA 1 Enable and set to ON Its demodulator should lock Rx traffic LED should go green 12 Enable Paired Carrier in the second modem Main 2 Edit 3 Rx 7 Carrier 4 Advanced 2 PCMA 1 Enable and set to ON Its demodulator should also lock Rx traffic LED should go green 13 Enable the BER test and check for data transparency i...

Страница 108: ...andby no transmit carrier is generated therefore there is nothing for Paired Carrier to cancel and the standby demodulator will not lock because it cannot separate the two interfering carriers from the online modem and the remote modem In this case a switchover from the online modem can never occur since the standby modem is from a logical point of view faulty and a switchover will not occur to a ...

Страница 109: ...whichever is available It uses the GPS information to calculate the minimum and maximum delays to satellite and updates these if they need to change from their existing values Factory default Set location Description Allows the selection of the method for determining the satellite round trip delay This can be entered as a time delay or can be automatically calculated from location information It c...

Страница 110: ...ont panel Up and Down arrow keys are used for setting and respectively Units Degs Minimum value 90 00 Maximum value 90 00 Step size 0 01 Factory default 00 00 Description The latitudinal position of the modem earth station The modem front panel Up and Down arrow keys are used for setting and respectively Earth station lon 180 to 180Degs 000 00 Step 0 01Degs New 000 00 E W Earth station lat 90 to 9...

Страница 111: ...set to Delay then the following screens are displayed in sequence Units ms Minimum value 000 00 Maximum value 300 00 Step size 0 01 Factory default 000 00 Description The minimum satellite round trip delay This value directly affects the modem acquisition time Once Paired Carrier is working in order to minimize the acquisition time it is recommended to use the actual measured satellite delay value...

Страница 112: ...d set the maximum delay to this value plus 0 5ms Edit Rx Rx Tx Screen Factory default Off Description Controls whether specific Rx configuration parameters mirror the equivalent Tx parameters Exceptions include the IF frequency spectral inversion clocking and timeslots as well as parameters that have no Tx equivalent such as buffer size and sweep control This feature can be used to simplify the co...

Страница 113: ...Quantum and Evolution Series Installation and Operating Handbook 7 83 1 19 3 3 Edit Unit Menu Front Panel Edit Unit Menus ...

Страница 114: ...hich restricts user access to just a subset of the most common modem controls whereas advanced mode allows the user to access all options This is not intended to be a security measure it merely removes options from view when not necessary and can therefore simplify modem use Time This allows the time and date to be set Advanced This submenu controls alarm thresholds special modes and allows the en...

Страница 115: ...ase see the note below pertaining to some options that have been removed from this menu 1 Edit Unit Interface RF IF Port Impedance Option Note that this option is no longer available or required on Paradise modems even when software upgrading older modems The line impedance 50 or 75 Ohms is matched without the need for any user input 2 Edit Unit Interface ESC Interface Option 3 Edit Unit Interface...

Страница 116: ...nterface the user will be asked to enter an IP address subnet mask and default gateway for the IP Traffic card HSSI Available at all data rates Quad E1 Once selected the Tx and Rx paths of the Quad E1 card can be set up using the Edit Tx Interface screen Section 7 3 3 1 8 and the Edit Rx Interface screen Section 7 3 3 2 9 respectively MultiMux A derivative of the Quad E1 interface if the mux SAF i...

Страница 117: ...E1 port 1 E1 port 2 E1 port 3 E1 port 4 Yes E1 IP E1 port 1 E1 port 2 E1 port 3 IP Yes E1 RS422 E1 port 1 E1 port 2 E1 port 3 EIA530 RS422 Yes E1 V35 E1 port 1 E1 port 2 E1 port 3 EIA530 V35 Yes E1 RS232 E1 port 1 E1 port 2 E1 port 3 EIA530 RS232 Yes E1 RS422 IP E1 port 1 E1 port 2 EIA530 RS422 IP Yes E1 V35 IP E1 port 1 E1 port 2 EIA530 V35 IP Yes E1 RS232 IP E1 port 1 E1 port 2 EIA530 RS232 IP Y...

Страница 118: ...Unit Interface Terrestrial IP Mode Screens Edit Unit Interface Terrestrial G 703 Data Rate Screen Options T1 Requires terrestrial data rate to be 1 544Mbps E1 Requires terrestrial data rate to be 2 048Mbps T2 Requires terrestrial data rate to be 6 312Mbps E2 Requires terrestrial data rate to be 8 448Mbps T3 Requires terrestrial data rate to be 44 736Mbps E3 Requires terrestrial data rate to be 34 ...

Страница 119: ...h G 703 as with AMI a mark logic one is sent as a pulse on the line and a space logic zero is set as the absence of a pulse on the line If there are too many contiguous spaces the G 703 receiver fails to recover the clock properly as there are no incoming pulses for a while and it causes data errors HDB3 and B8ZS for example are both methods of ensuring that no more than three or eight zeroes resp...

Страница 120: ... when T1 or T2 is selected Edit Unit Interface IP Menu This menu has the following options Mode This controls the various IP features such as bridging routing acceleration and compression Address This is used to set up the IP terrestraial and satellite traffic addresses Misc This submenu controls miscellaneous IP related options such as VLAN IPV6 and line speed duplex settings Edit Unit Interface ...

Страница 121: ...e routing table can be populated by manually entering routes and or by turning on one or more of the supported dynamic routing protocols The dynamic routing protocols enable the modem to automatically populate the routing table based on information forwarded by other routers in the network The modem operates as a two port router in this mode See the TCP IP white paper at http www paradisedata com ...

Страница 122: ...as a point to multipoint remote site All modems connected to a point to multipoint bridge network that are situated at remote sites i e not on the hub should be configured to this mode Header Compression This is a bridging point to point mode where UDP and IP packet headers are compressed in order to save satellite bandwidth The bandwidth savings depend on the particular packet sizes being used Th...

Страница 123: ...cceleration This mode supports point to multipoint TCP acceleration The remote modems should be set to this mode and VLAN filtering should also be enabled Hub TCP Acceleration This mode supports point to multipoint TCP acceleration The hub Tx modem should be set to this mode and VLAN filtering should also be enabled on this modem Note that hub Rx only modems in a point to multipoint TCP accelerati...

Страница 124: ...compression system should be set to this mode and should have VLAN filtering disabled Bridged TCP acceleration This mode supports point to point TCP acceleration but unlike TCP acceleration mode the original Ethernet frames are preserved over satellite This allows TCP acceleration of any number of VLANs Uniquely It also supports acceleration of MPLS streams Note that in this mode for ease of use t...

Страница 125: ... this mode for a remote modem if the two cables have been mixed up then M C communications with the modem will be lost On In this mode the Remote M C Ethernet interface is included in the Ethernet bridge thereby allowing IP traffic and M C traffic to be via either one cable or via two cables with them being interchangeable in relation to the two physical Ethernet ports on the base modem Factory de...

Страница 126: ...f TCP packets using a Performance Enhancing Proxy PEP that overcomes performance problems associated with using standard TCP over satellite No TCP acceleration TCP acceleration is turned off Factory default No TCP acceleration mode Description This option is available in routing mode In bridging mode acceleration is selected via the Ethernet mode control TCP accelaration No TCP acceleleration New ...

Страница 127: ...or the link i e the link s data capacity multiplied by the end to end delay When TCP acceleration is operating at its maximum throughput level this helps to maintain the throughput at a steady level avoiding perturbations that can otherwise occur Edit Unit Interface IP Mode Payload Compression Screen Options Off Payload compression of IP packets is switched off On Payload compression of IP packets...

Страница 128: ...mode the modem stores web pages returned from web servers as a result of requests made by users from their web browsers Once the web page has been received by the modem the modem parses through the page checking for in line objects such as images These images do not form part of the web page and are requested separately by the web browser If the web page contains multiple embedded images or object...

Страница 129: ...e Tx service is set to DVB S2 It controls DVB S2 ACM in the Tx path Note that a similar screen is then displayed for ACM in Rx Enabling ACM in Rx causes the modem to automatically insert regular Es No information into the modem s carrier with no material effect on bandwidth This is used to control the carrier modcod selection of the other modem Other than Off On there are no other ACM user control...

Страница 130: ...interchangeably Unlike the base modem Remote M C port DHCP is not supported and therefore an address must be manually entered The traffic port IP address is not directly used in straight bridging mode although the address must be a valid one for the local network in point to point bridging mode The IP address is however used in modes using TCP acceleration and header compression See Section 8 12 f...

Страница 131: ...raight bridging mode it is not normally necessary to set this gateway as the bridge automatically learns the location of each device Note that there are two gateways that can be defined in the modem The Traffic Port IP Gateway is used exclusively in relation to the IP Traffic card The Remote Control Port IP Gateway on the Edit Unit M C IP menu will be used in relation to the M C network and the Re...

Страница 132: ...s Satellite Port IP Gateway Factory default 0 0 0 0 Description Sets the IP traffic gateway for the satellite interface when the modem is in routing mode Edit Unit Interface IP Misc Screens When this option is selected the following sequence of screens is displayed in turn Edit Unit Interface IP Misc VLAN Filtering Screen Options Off Satellite port IP netmask 255 255 255 255 New 255 255 255 255 Sa...

Страница 133: ...oint to multipoint filtering of traffic at remote modems to filter out unwanted broadcast traffic This option is only available in Hub and Remote Ethernet traffic modes since it is only used in point to multipoint mode where there is a direct return path Edit Unit Interface IP Misc VLAN ID Screen Units None Minimum value 0 Maximum value 4094 Step size 1 Factory default 0 Description Sets a specifi...

Страница 134: ...otocol for encapsulating IP packets and Ethernet frames into MPEG2 transport stream packets for transmission over satellite This protocol uses considerably less overhead than either MPE or ULE but requires Paradise modems to be used at both ends of the link It is always used automatically when SmartLink which is also proprietary is operational Factory default MPE Description Sets the protocol to b...

Страница 135: ...re being generated by a non Paradise modulator a Paradise modulator will always set the MPE MAC address to all zeros or the modulator s MAC address depending on whether it is in bridging or routing mode Edit Unit Interface IP Misc Encapsulation PID Screen Units None Minimum value 768 Maximum value 1023 Step size 1 Factory default 970 Description When encapsulating Ethernet frames or IP packets int...

Страница 136: ... for transmission based solely on their priority highest will always be sent first Fair weighting queuing higher priority transmitted first but lower priority packets are given a percentage of the bandwidth to stop total starvation The implementation of IEEE 802 1p is as follows The 8 QoS priority levels are mapped to three TCP IP queues in the modem Packets with highest QoS priority level 7 are s...

Страница 137: ...orrectly Full duplex Selects full duplex mode for the base modem terrestrial IP traffic interface This should only be used when the modem is connected directly to an Ethernet switch or a PC i e when there are only two devices on the segment of the network that can potentially transmit at the same time In full duplex mode the base modem will transmit and receive at the same time However it cannot d...

Страница 138: ...gotiation will advertise 100Mbps half duplex as the only option available 100M full duplex In this mode the IP Traffic card will auto negotiate both the speed and duplex setting for the interface but as part of the negotiation will advertise 100Mbps full duplex as the only option available 1000M half duplex In this mode the IP Traffic card will auto negotiate both the speed and duplex setting for ...

Страница 139: ...efault Half duplex Description Sets the speed and duplex for the IP Traffic card interface Changes will be effective immediately but if an auto negotiated mode is selected then the Ethernet connection to the IP Traffic card may have to be briefly disconnected in order for the change to take effect See the preceding description of the Edit Unit Interface Terrestrial IP Modem Duplex Screen for furth...

Страница 140: ...ork loops from occurring A network loop can be created for example in a point to multipoint scenario where there are multiple Rx only modems with a common indirect return path and a default gateway is specified that causes data not destined for a particular Rx modem to be routed out of the gateway and back to the sender through the return path Factory default Off Description Controls whether the E...

Страница 141: ...ollowing set of options depending on whether it is a Quad E1 or Sat ABIS card Note the Quad E1 interface can use either an IBS framed service fixed 6 7 overhead or Closed Network or Closed Network plus ESC configurable overhead with minimum of 0 39 See Section 8 10 for maximum overhead baud rates for Quad E1 Edit Unit Interface Quad E1 Tx Data Rate Screen Units bps Minimum value 0 Maximum value 20...

Страница 142: ... The specified port on the Quad E1 card is being used between a TRAU Transcoding and Rate Adaption Unit and BTS Base Transceiver Station Other The specified port on the Quad E1 card is not being used in any of the above situations This option allows timeslots for the particular port on the Quad E1 card to be configured manually Factory default Off Description This selects the operating mode for th...

Страница 143: ...actory default 0 Description Controls which terrestrial timeslots are dropped i e multiplexed into the satellite frame Timeslots cannot be reordered when being used with the Quad E1 card Timeslots can be entered as individual numbers separated by commas or as an inclusive range denoted by the first and last timeslot numbers in the range with a hyphen between them For example 0 17 18 31 Note that o...

Страница 144: ...placed with Idle code Factory default Leave on bearer Description Controls whether dropped timeslots are replaced with Idle code in relation to the specific port on the Quad E1 card If the Rx data is to be inserted into the same timeslots as the Tx data has been dropped from then the Rx data will replace the Tx data and therefore this setting is irrelevant Edit Unit Interface Quad E1 Interface Loo...

Страница 145: ... Timeslots Screen This is similar to the Quad E1 Tx Dropped Timeslots screen but controls the specific timeslots that are inserted into the E1 bearer on the receive side of the link Edit Unit Interface Quad E1 Rx Generate Bearer Screen In relation to the specific port of the Quad E1 card this controls the origination of a terrestrial bearer from the Insert MUX It allows a choice of auto originatin...

Страница 146: ...r This specifies the unit s RS485 address Gateway This allows a default IP gateway to be specified This acts as the next hop when forwarding IP data not destined for the modem or local subnet IP addr This option sets the IP address for the remote control interface Subnet mask This sets the remote control port IP subnet mask Edit Unit M C Control Screen Options Local Giveaway Takeaway Factory defau...

Страница 147: ...ssword Screen Factory default paradise Description Modem password for remote admin user login login name is admin The admin user can both view and control the modem Only one admin user can be logged in at a time Edit Unit M C View Only Password Screen Factory default paradise Description Modem password for remote view only user login login name is user Multiple view only users can be logged in at ...

Страница 148: ...reen Options RS232 RS485 IP Local Only available when IP over ESC has been selected This pushes the serial M C data across to the distant end Modem via the IP ESC for use at the remote serial ports This link is a serial extension for control of distant end equipments IP Remote This allows the serial M C data received via IP from the local Modem to be used at the distant end serial ports Uses TCP p...

Страница 149: ...y available when IP over ESC has been selected This takes advantage of the local IP address and forwards M C information directly to the remote Modem Uses TCP port 6703 This link is a serial extension for control of distant end equipments Factory default RS232 The following diagrams show how the M C interfaces may be configured using the IP Local IP Remote and IP forwarding options to facilitate d...

Страница 150: ...Quantum and Evolution Series Installation and Operating Handbook 7 120 Description Specifies the remote control serial interface mode ...

Страница 151: ...P Remote Rem M C is selected Please refer to chapter 11 for full connector pinouts Pin Signal name Direction Name RS485 Paradise IP Remote Paradise IP Remote Rem M C 1 Shield Gnd Shield Gnd Shield Gnd 3 Master B to modem RX B TX B 4 Slave B from modem TX B RX B 5 Shield Gnd Shield Gnd 6 Slave A from modem TX A RX A 9 Master A to modem RX A TX A ...

Страница 152: ...50 baud 300 baud 600 baud 1200 baud 2400 baud 4800 baud 9600 baud 19200 baud 38400 baud 57600 baud 76800 baud 115200 baud Factory default 9600 baud Description Specifies the remote control serial interface baud rate Edit Unit M C RS485 Address Screen Baud rate 9600 baud New 9600 baud RS485 address 0 to 255 1 Step 1 New 1 ...

Страница 153: ...s Screen Factory default 10 0 70 1 Description Sets the IP address for the remote control interface The same IP address is used by the modem for traffic purposes when configured for IP traffic Note that entering an IP address of 0 0 0 0 causes the modem to dynamically request an IP address from a DHCP Dynamic Host Control Protocol server on the network removing the need to allocate static IP addre...

Страница 154: ... M C IP Subnet Mask Screen Factory default 255 255 0 0 Description Sets the remote control port IP subnet mask The same IP subnet mask is used by the modem for traffic purposes when configured for IP traffic Edit Unit Clocks Screen Options None BNC RS422 Factory default None Description Controls the station clock source to be used in place of either the internal 10MHz reference or to replace only ...

Страница 155: ...options under Edit Tx Clocks and Edit Rx Clocks these options become available when a station clock source is selected and are independent of whether station clock replaces the internal 10MHz clock Edit Unit Clocks Station Clock Frequency Screen Units kHz Minimum value 1 Maximum value 10000 Step size 1 Factory default 10000 Description Indicates to the modem the frequency of the station clock inpu...

Страница 156: ...ifying the menu structure when the more advanced modem features are not required Edit Unit Time Screen This option allows the current time and date of the modem to be set in the format HH MM SS DD MM YYYY The time is maintained even while the modem is switched off Edit Unit Advanced Alarms Thresholds Deferred Alarm BER Threshold Screen User level Advanced 1 Basic 2 Advanced Date time 14 41 45 06 0...

Страница 157: ...e BER threshold alarm option of the Edit Unit Advanced Alarms Actions menu Edit Unit Advanced Alarms Thresholds Rx Eb No Deferred Alarm Threshold Screen Units dB Minimum value 0 0 Maximum value 99 0 Step size 0 1 Factory default 3 0 Description Sets the Eb No threshold below which a deferred alarm will be generated Edit Unit Advanced Alarms Thresholds Buffer Slip Deferred Alarm Screen EbNo thresho...

Страница 158: ...nit Advanced Alarms Thresholds BUC PSU Alarm Screen Units A Minimum value 0 1 Maximum value 6 Step size 0 01A Factory default 0 1 Description On L band modems sets the trip threshold at which a fault is declared when the current drawn by the Tx ODU is outside the limit Both a minimum and a maximum current threshold can be set Edit Unit Advanced Alarms Thresholds AUPC Deferred Distant AlarmScreen D...

Страница 159: ... Unit Advanced Alarms Thresholds Dropped TRAU Count Threshold Screen Units None Minimum value 0 0 Maximum value 9999 0 Step size 1 0 Factory default 9999 0 Description Sets the error rate threshold for dropped TRAU frames above which a dropped TRAU alarm will be generated when using the Sat ABIS interface card Edit Unit Advanced Alarms Thresholds LinkGuard Threshold Screen TRAU threshold 0 0 to 99...

Страница 160: ...n LinkGuard will automatically check whether the level of interference is above the user set threshold and initiate an alarm warning if it is The threshold can be set via the Edit Unit Advanced Alarms Thresholds LinkGuard Threshold screen BER Controls whether the BER threshold alarm is enabled BUC PSU Controls whether the combined over under current over temperature alarm for the Tx DC switch is c...

Страница 161: ...fferential Coding Screens Factory default On Description If FEC off is selected then further menus are displayed that allow control of whether differential coding is enabled or not only the Tx differential coding screen is shown above Under all normal operating modes both the FEC and differential coding must be On Edit Unit Advanced Special Modes Q323 Compatibility Screens The Q323 interface card ...

Страница 162: ...ed through the modem Note this is the same as SW3 1 within the Q323 definition Options Off TS0 transparent On TS0 Bit 0 overwritten with CRC4 Factory default Off Description Controls whether TS0 is transparent or whether TSO is overwritten with CRC4 multiframe Note this is the same as SW3 2 within the Q323 definition Invert Data Q323 Switch 1 Off 1 Off 2 On TS0 bit 0 CRC4 Q323 Switch 2 Off 1 Off 2...

Страница 163: ...ransparent Note this is the same as SW3 3 within the Q323 definition Options Off If Switch 1 is ON then all bits are inverted On If Switch 1 is ON then bits 1 2 5 and 6 are inverted Factory default Off Description Controls whether all bits are inverted or bits 1 2 5 and 6 are inverted Note this is the same as SW3 4 within the Q323 definition TS16 Transparent Q323 Switch 3 Off 1 Off 2 On Invt bit 1...

Страница 164: ... 1 1 1 0 TS1 31 Invert CRC4 As above with CRC4 multi frame in TS0 bit 1 1 0 1 1 TS1 15 17 31 Bit Invert Data bits 1 2 5 and 6 are inverted TS16 Channel Associated Signaling support 1 1 1 1 TS1 15 17 31 Invert CRC4 As above with CRC4 multi frame in TS0 bit 1 1 switch on 0 switch off When transparent TS16 options are selected and the P300 Quantum Evolution are in drop and insert mode the modems must...

Страница 165: ...ult Off Description This adds support for sun outages Typical the demodulator will go in and out of lock several times during a sun outage This option allows the terrestrial output to be muted below an associated user defined Eb No threshold see next screen to prevent multiple disturbances on the terrestrial input which can potentially be a point of contention in relation to service level agreemen...

Страница 166: ...et to on mute if outage Please see Edit Tx Carrier menus Edit Unit Advanced Operation End Demo Screen This allows the modem demonstration test shot features to be turned off therefore effectively losing the remaining balance of demonstration time left and returning the modem to a state whereby it is using only permanent SAF features that have been set Edit Unit Advanced SAF Code Screen Factory def...

Страница 167: ...memory allows The memories are non volatile and will persist between successive power ups of the modem Configuration memories can be assigned any desired name using the alphanumeric keypad Recall This allows a previously stored configuration to be selected and used in place of the current configuration Erase This option allows configuration memories to be deleted Note that one configuration memory...

Страница 168: ...r Screen Options Switch to standby This option forces a modem that is on traffic to standby This is done by momentarily creating a fault condition that forces a switchover to occur Switch to maintenance Allows the modem to be removed from the redundancy group therefore preventing the unit being switched on line Switch to service Allows the modem to enter a redundancy group and be available to come...

Страница 169: ... traffic faults Edit Redundancy 1 For N Menu Virtually all of the options on this menu are only available if the modem is acting as the backup modem in a 1 N redundancy switch Please see separate redundancy switch operating manual for further details The one menu option that is relevant to traffic modems in a 1 N redundant system is described below Edit Redundancy 1 for N Traffic Modem 1 N Address...

Страница 170: ...olution Series Installation and Operating Handbook 7 140 redundancy switch Note the modems position within the redundancy switch system dictates the 1 N address Please see separate redundancy switch operating manual ...

Страница 171: ...ints in the transmit and receive processing chain power supply levels modem internal temperature and modem loopback status Alarms This provides access to transmit receive and unit current alarm information Note that entering 0 clears any existing latched alarm Log This provides access to the system log This includes a list of all notable events that have occurred including alarms Entries are times...

Страница 172: ...ate BER Tester RF This provides two types of signal a CW pure carrier signal and an alternate 1 0 signal that can be used to test modem operation IDR This provides a simple tone generator at 1 KHz 0dBm level either towards the satellite or from satellite IP Allows a one way satellite delay in milliseconds to be entered This can be used in modem back to back testing to simulate the normal satellite...

Страница 173: ...sually the remote modem The other modes are more specialized and cause a loopback at various points within the Tx Rx processing chains In general it is not a good idea to loopback IP data to itself This will cause the modem to retransmit on its terrestrial port packets that it has received and this can confuse intelligent switches which conclude that the original sending device has moved and is no...

Страница 174: ...to monitor the BER of the Rx satellite path even while the main data channel of the link is carrying normal traffic It allows a test pattern to be sent and received in the main channel or in parallel with the main channel using the ESC or Aux overhead channels It can operate independently or in conjunction with external BER equipment The test patterns are Fireberd compatible For example the intern...

Страница 175: ...s the BER test pattern to be injected in either the main traffic channel of the modem or in an overhead channel Pattern This allows a choice of bit patterns to be selected for injection into the traffic stream Test BER Tx Mode Screen Options Off Switches the BER tester off On Switches the BER tester on Factory default Off Description Controls the BER test mode Tx 1 Mode 2 Channel 3 Pattern BER mod...

Страница 176: ...annel is used which can also be used in an asynchronous mode Aux channel This selects the Aux channel as the path into which the PRBS test pattern is injected This is valid in IBS SMS and IDR modes The Aux channel must be configured before it can be used In IBS SMS the overhead assigned to the mandatory Intelsat low rate oversampled Aux channel is used by the BER tester to provide a synchronous te...

Страница 177: ...t BER Tx Results Screen The BERT shows the instantaneous test pattern synchronisation status When the Rx path is synchronised to the incoming Tx test pattern then this will display Sync OK and when synchronisation is lost it will display NO SYNC The Time field indicates the elapsed time since the test was started or restarted The Loss field is a count of the number of times that pattern synchronis...

Страница 178: ...effect The Restart test option is used to restart the BER test including clearing all of the error counts Note that pressing 2 on the key pad while on the results screen has the same effect Pressing the Back key returns the display to the previous results screen Test RF CW Screen Factory default Off Description Selecting Tx CW causes a pure carrier to be transmitted rather than the normal modulate...

Страница 179: ...t Off Description Selecting the wide spectral graph prevents the Demod from locking and is therefore implemented as a test mode At four times the symbol rate it allows viewing of a wider frequency range than the standard modem web spectral graph Note a superwide graph showing 50MHz of spectrum which does not prevent the Demod from locking Test IDR Screen Options Tx tone on Rx tone on Tx tone off R...

Страница 180: ...d Operating Handbook 7 150 Selecting IDR Rx tone on enables a 1KHz 0dBm level tone to be generated towards the terrestrial equipment in both audio channels Note that these are toggle on off functions and when disabled will be shown as hashed out ...

Страница 181: ...ND CAUSE PACKET STORMS THAT MAY BRING YOUR NETWORK DOWN THIS IS BECAUSE THE SWITCH WILL SEE THE PACKETS LOOPED BACK THROUGH THE MODEM AS AN INDICATION THAT THE NETWORK DEVICES THAT ORIGINALLY TRANSMITTED THOSE PACKETS HAVE MOVED TO A DIFFERENT SWITCH PORT AND WILL THEREFORE RETRANSMIT ALL RECEIVED PACKETS AGAIN AD INFINITUM 1 20 1 Logging In and Out The philosophy behind user levels login and cont...

Страница 182: ...and Operating Handbook 7 152 Web User Interface Login Screen On successfully logging in the user will be presented with the following screen Web Server Welcome Screen The view only access message may be displayed depending upon login conditions ...

Страница 183: ...e help on context sensitive features it is triggered by moving the cursor over an item such as a display label which is then described within the Help box The LED mimic on the left of the screen depicts the modem front panel LED indicators A typical Edit screen that demonstrates the most common types of user entry is shown overleaf It shows a mixture of drop down boxes where a selection is made fr...

Страница 184: ...al spectrum and as an oscilloscope to view the I and Q channel Rx signal constellation Other graphs provide time based logging for up to one month of key modem parameters such as Rx Power Level Eb No etc In fact all of the information presented on the graphs can be retrieved from the modem in order to for example generate monthly Quality of Service reports regarding modem availability and operatio...

Страница 185: ... four times the symbol rate and this can be used for checking for adjacent interfering carriers In wide mode the demodulator is reprogrammed with different values to normal operation and consequently the wide mode of operation is only available as a special test mode since it would otherwise interfere with any traffic In super wide view which can be used without interfering with traffic the spectr...

Страница 186: ...on graph is shown below This can be used to check for correct modem operation including issues such as distortion and phase noise A persistence mode is also available and allows the user to see the long term effects of phase noise and interference Excessive phase noise can cause cycle skips otherwise seen as unwanted rotations within the constellation ...

Страница 187: ...can be retrieved from the modem perhaps for use in quality reports using one of the remote interfaces see the Remote M C Specification for Quantum and Evolution Series Satellite Modems for more details In fact remote control commands can be used to start the automatic recording of any parameter within the modem whether or not these are supported as graphs on the web interface The web interface sup...

Страница 188: ...affic information IP packets dropped packets and errors can also be displayed for both Tx and Rx These graphs are sub divided into IP traffic M C and satellite categories If an IP traffic card is fitted then these graphs automatically relate to the IP traffic card information Examples of time based and IP traffic graphs are shown below and overleaf Eb No Graph ...

Страница 189: ...hod of configuring a batch of modems by generating a configuration on one downloading it to a PC and then uploading it to other modems in turn When recalling a configuration memory the LOAD_DEFAULTS memory will reset the modem to its factory defaults If LOAD_DEFAULTS is selected from the web user interface then the modem s current M C IP address netmask gateway giveaway takeaway control Modem ID a...

Страница 190: ...Quantum and Evolution Series Installation and Operating Handbook 7 160 Configuration Memory Download Screen Configuration Memory Upload Screen ...

Страница 191: ...ry 4 packets sent from the high priority queue 2 are sent from the medium priority queue and 1 from the low priority queue The modem supports IEEE 802 1q VLAN tagging If Ethernet frames with VLAN tags are presented to the modem when in bridge mode then these packets will be transmitted transparently along with the VLAN tags VLAN filtering can also be used with point to multipoint topology to separ...

Страница 192: ...imes the satellite delay to be displayed The Paradise web proxy examines webpage frames as they pass through the modem and pre fetches all of the content before it is requested It is therefore typically available in cache memory at the modem local to the web browser prior to the browser actually requesting the remaining content The Bridge Filtering option forms part of the Brouting traffic mode an...

Страница 193: ...lution Series Installation and Operating Handbook 7 163 Transmit Timeslot Selection Screen 1 20 6 System Log The system log can be viewed using the View Log menu tab An example log is shown overleaf System Log Screen ...

Страница 194: ...n be viewed using the View Alarms menu tab An example screen is shown overleaf System Alarms Screen 1 20 8 On line Installation and Operation Handbook This handbook is available on line via the Help button The handbook appears in a pop up window allowing it to be kept open in the background as shown overleaf ...

Страница 195: ... The features available can be seen from the View SAF menu screen This screen also allows a test shot to be started or stopped If a 10 day test shot is active the word Demo is added to the SAF label of each additional feature started by the test shot and the text colour is changed to amber Permanent features are always shown in blue ...

Страница 196: ...odem are documented in the Remote M C Specification for Quantum and Evolution Series Satellite Modems The SNMP configuration screen found under the Edit Unit M C Advanced menu tab is shown overleaf The community names represent passwords that must be present in each SNMP read or write requests in order for the commands to be executed The source identifier fields can be used to define which source ...

Страница 197: ...process for both operations being the same From the screen shown overleaf it is necessary only to browse to the location of the upgrade file and open the file The latest software can be found under Downloads on the Paradise company web site at http www paradisedata com The software should be downloaded from the web site to a temporary location that can be accessed by the modem Feedback on the prog...

Страница 198: ...et Files options A software upgrade cannot be performed whilst the modem is on traffic Once the modem upgrade process starts normal modem functions are suspended The modem configuration prior to upgrade is maintained and the modem will use this configuration after the upgrade 1 20 11 2 Procedure This procedure allows a Quantum or Evolution series modem to be upgraded with the latest version of sof...

Страница 199: ...k the software zip file that was downloaded The upgrade will begin automatically Leave the modem to upgrade and restart before attempting any further action This will take around 10 minutes Note 1 Prior to starting an upgrade please ensure that none of the following files appear on either the PC desktop or within the User profile directory as a result of a previous failed upgrade UImage CF img gz ...

Страница 200: ...ere is an enhanced PRBS BER Tester available via the web user interface The enhanced BER Tester additionally Allows PRBS BER data to be generated towards the terrestrial interface allowing the modem to be used as a stand alone PRBS BER tester in place of a Fireberd or similar Supports an enhanced range of test patterns namely PRBS 2 N 1 where N 6 7 9 11 15 19 20 and 23 All 0 s All 1 s Numerous spa...

Страница 201: ...t was started or restarted The Errors field indicates the total number of error bits detected since the test started The Average BER field indicates the number of bit errors in relation to the number of bits received Latency is shown in terms of both bits and time The Sync OK LED shows the instantaneous test pattern synchronisation status When the Rx path is synchronised to the incoming Tx test pa...

Страница 202: ...noteable events that have occurred Current system alarms i e all Unit Tx and Rx faults and warnings All configuration memories Instantaneous spectrum data Instantaneous constellation data Instantaneous PRBS BER test results The information is sent in CSV format which allows the data to be instantly copied into any spreadsheet from where it can be viewed in a number of formats e g as a graph or a t...

Страница 203: ...pient s account and open it To import the constellation data into a spreadsheet program Microsoft Excel is used in this example do the following Double click on the email attachment constellation csv and open it this should automatically start Excel if not save the attachment and then open it directly from within Excel Within Excel highlight the A and B columns Select the Chart Wizard from the too...

Страница 204: ... email feature to request technical support On the web user interface select the View tab followed by Support The support configuration screen is shown over the page Complete the contact details and type your request and send the email The email is automatically sent to Paradise Datacom s technical support team Note that the SMTP email server address has to be entered on the email configuration sc...

Страница 205: ...com Customer Technical Support Enquiry Screen 1 20 14 IP Static Routes If you wish to work with more than one subnet the web user interface allows up to 64 static routes to be added The static route configuration screen found under the Edit Unit Network menu tab is shown over the page ...

Страница 206: ...n 1 and 3 bytes Ethernet header compression is also supported in addition and this reduces 14 bytes of Ethernet frame down to typically 1 byte Overall savings from compression from both types of compression e g for a G 729 voice stream can be as high as 60 It is widely acknowledged that ROHC is the most suitable available header compression technology for use over satellite and outperforms older t...

Страница 207: ...routes The following will be compressed when the feature is enabled The Ethernet header will be compressed on every frame IP and UDP headers will be compressed when the IP payload contains a UDP packet The IP header can only be compressed when the packet contains a UDP transport layer payload IP UDP and RTP headers when the IP payload contains both a UDP and RTP packet Header Compression Configura...

Страница 208: ...g this onto to the web browser The selection of Local or Remote mode is made through the toggle switch on the right hand top corner of each web page as shown below Local Remote Modem Web Interface Toggle Switch 1 20 17 Adaptive Signal Pre distorter This feature which is controlled from the web user interface enables 16QAM constellations to be adaptively predistorted to counter the effects of AM AM...

Страница 209: ... Configure the modem in a closed loop setup as described above 2 Ensure the modem is in 16 QAM mode for both Tx and Rx 3 Configure the modem Tx output power to the required level in the Edit Tx Rx Common tab It is recommended this level should not exceed 10dBm as some power headroom is needed for the predistorter to apply its expanding nonlinear characteristic 4 In the Edit Tx Rx Common Predistort...

Страница 210: ...if necessary some time later Note that it is necessary to go through this learning process whenever the operating point of the HPA is changed Consequently it may be convenient to generate and save the predistortion information for all HPA operating points in advance and simply select the appropriate saved configuration whenever the HPA operating point is changed 7 The predistorted Tx constellation...

Страница 211: ...Quantum and Evolution Series Installation and Operating Handbook 7 181 Predistorter Screen showing convergence after 90 iterations ...

Страница 212: ...ere is more than one clock in the system and a buffer is required to absorb the difference between the two clocks Typically data is placed into the buffer with one clock and removed with another thus causing a gradual continuous filling or emptying of the buffer causing slips on a regular basis The period between buffer slips when it is totally full or empty will be constant and proportional to th...

Страница 213: ...looped back through the DTE equipment ModemTx Data Interface FIFO DDS PLL VCXO TCXO TxData TxClock TT Internal TxClock ST Internal Tx Clock Mode 1 21 1 2 Tx Clock In When Tx Clock In is selected the DTE equipment is responsible for providing the clock The modem provides a signal on ST Send Timing in this mode and requires a clock signal to be provided on TT Terminal Timing The ST signal is provide...

Страница 214: ...the DTE that is locked to the receive satellite signal The timing is actually phase locked to the Rx data rate but at the frequency of the Tx data rate This is to allow asymmetric operation The DTE then synchronises the data going into the modem SD to this clock If the external clock is missing for any reason then the modem will substitute an internal clock Modem Tx Data Interface FIFO DDS PLL VCX...

Страница 215: ...s that the signal will be subject to Doppler plesiochronous offsets ModemRx Data Interface RxBuffer DDS VCXO RxData RxClock RT PLL RxClk Data from decoder deframer Satellite Rx Clock Mode 1 21 2 2 Tx Clock In When Tx Clock In is selected the Rx clock and data are phase locked to the Tx data rate frequency but at the Rx data rate The clock and data appear on RT Receive Timing and RD Receive Data re...

Страница 216: ...fer is enabled The clock and data appear on RT Receive Timing and RD Receive Data respectively The station clock input can be configured to provide a clock just for Rx path processing or it can be used to replace the modem s internal 10MHz clock used for all internal processing The station clock frequency need not equal the modem s internal 10MHz clock frequency when it is being used to provide ju...

Страница 217: ...the incoming Rx clock Tx Clock Rx or clock looped by the equipment or cables your end o If not what is the accuracy of your Tx clock The various Tx and Rx clocking modes of the modem are described in the following sections 1 21 3 1 Clock Loop At One End The end with the clock loop requires Buffer disable Rx Clock Satellite If there is either a cabled clock loop or the equipment loops the Rx clock ...

Страница 218: ...en both ends need the buffer active to cope with the normal Doppler effect plus the plesiochronous effect i e the difference between the clocks at each end Apply the following rules to both ends 1 21 3 3 Clock from the interface terrestrial network If the modem has a station clock which also drives the network which the Rx output feeds then select Rx Clock Station If there is no station clock then...

Страница 219: ...ia a G 703 clock extension feature that propagates a high stability reference from the hub to the remote It is necessary for a high stability E1 T1 reference signal from a GPS receiver to bes fed to only the hub modem via the G 703 balanced or unbalanced connectors thereby saving the cost of multiple GPS receivers at the remote sites The remote modem can then generate a T1 E1 signal synchronized t...

Страница 220: ...te clock and the selected terrestrial interface is not G703 the user is asked a further question Generate a G703 clock reference from satellite clock Options OFF E1 T1 Factory default OFF Description Allows a high stability reference signal to be proogated over satellite Any selection on this screen will result in the generated Rx clock for the Rx data path being requested at the Rx data rate and ...

Страница 221: ...ous ESC channel 1 2000th the data rate that is available on the Aux port of the modem This results in asynchronous rates of less than 110 Baud at greater than 256kbps A TS32 multiframe sequence to allow the transmission of satellite encryption control vectors and three 8 bit carrier IDs referred to as Station Channel and Spare ID Overhead channels to convey Channel Associated Signalling CAS corres...

Страница 222: ...e TS32 Multiframe sequence M If IBS satellite link encryption is in use very very rare then it also conveys the encryption control vectors otherwise these bits are spare X as shown One bit is also forced to a logic 1 for frame alignment resulting in a content of E1BMXXXX A standard IBS frame then is 64 x 8 ie 512 bits long TS32 Multiframe A 64 bit multiframe pattern is placed one bit at a time int...

Страница 223: ...o the IBS SMS framing via the Drop Insert multiplexer Operating over satellite without TS ID maintenance is comparable to using an external Drop Insert mux interfaced in our 2 x 64kbps example to the modem at 128kbps Once demultiplexed to 128kbps the start and end boundaries of each timeslot are lost in the continuous 128kbps data stream Without the TS ID maintenance there would be 16 different wa...

Страница 224: ...0 available data timeslots N 8 24 Finally to support one further rate four frame are used 4 Frames ie 240 available data timeslots N 16 The remaining values of N cannot have Timeslot ID Maintained by groups of 1 2 or 4 frames these are collectively know as the Odd values of N Odd values of N N 7 9 11 13 14 17 18 19 21 22 23 25 26 27 28 29 31 Most previous equipment could not provide timeslot ID ma...

Страница 225: ...sub primary order satellite circuits thin routes by selecting the timeslot carrying the CCS for Drop Insert as with other data timeslots Special action is required with CCS as the equipment at both ends of the link needs to be configured for the thin route over the satellite so it does not dynamically allocate traffic to a timeslot that is not passed over satellite link Channel Associated Signalli...

Страница 226: ... signalling data timeslots are available for the high rate ESC Similar to the fitting of the main data into the 60 timeslots available for data per IBS frame the abcd signalling information has to be fitted into the 30 available nibbles in the 15 signalling data timeslots in TS16 TS48 following the CAS MF unique word in TS16 There are certain values of N for which this will work ie where 30 N give...

Страница 227: ... 13 CAS 104 CAS 104 CAS 104 CAS 104 14 CAS 56 CAS 56 CAS 56 CAS 56 15 TS 32 CAS 8 CAS 24 CAS 24 16 TS 32 CAS 64 CAS 16 CAS 32 17 CAS 136 CAS 136 CAS 136 CAS 136 18 CAS 24 CAS 24 CAS 72 CAS 72 19 CAS 152 CAS 152 CAS 152 CAS 152 20 TS 32 CAS 16 TS 32 CAS 8 21 CAS 56 CAS 56 CAS 168 CAS 168 22 CAS 88 CAS 88 CAS 88 CAS 88 23 CAS 184 CAS 184 CAS 184 CAS 184 24 TS 32 CAS 32 CAS 24 CAS 48 25 CAS 40 CAS 40...

Страница 228: ...ional carrier that there is trouble with the link in the other direction Additional Features Paradise products Where many IDR carriers exist between sites the Audio ESC on the second and subsequent carriers are not required as the mandatory station to station ESC is met with the first carrier The modem equipped with the IDR option allows 32 or 64kbps access to the bandwidth occupied by these audio...

Страница 229: ...nt end Eb No can be recorded regularly in the local end traffic log To maintain the distant Eb No a target Eb No level has to be set along with a maximum transmit power level for the local end When the target Eb No is exceeded by more than a pre defined tolerance the transmit power is adjusted to bring the distant Eb No back to the target value The power will continue to be adjusted automatically ...

Страница 230: ...termine if it is being maintained correctly under differing atmospheric conditions Optionally use the web graphing feature to record the distant Eb No and or the AUPC delta power this may be useful in ascertaining whether AUPC manages to maintain the Eb No within the parameters you have set and also in being able to specify to the satellite operator the exact power being transmitted at a particula...

Страница 231: ...as the standby unit The modem software performs internal monitoring of operational status at a rate that prevents unnecessary switching However in the case of catastrophic failures the modem hardware performs the switch immediately without waiting for the software The logic has no memory i e a unit taken off line because of a failure will operate normally once it becomes operational again with the...

Страница 232: ...ne unit back to its self will not work since the standby unit output is muted and it will therefore not detect any carrier 1 25 Software Activated Features While some modem functions are available as plug in option cards the majority of additional functions are made available through Software Activated Feature SAF support As the name implies these are modem features that can be enabled by entering...

Страница 233: ...e bearer This technique can be applied to lower rate carriers also For example suppose four destinations require mesh connectivity at 384kbps 6 x 64kbps although asymmetric operation up to any rate is possible Each site has a modulator transmitting 1152kbps 3 x 384kbps and three demodulators receiving the 384kbps from the other sites The satellite bandwidth requirement is for four 1152kbps carrier...

Страница 234: ...iple of 8kHz and these non optimum values make the satellite clock an 8kHz step Where maximum error correction capability is required chose t as high as possible eg 10 and choose n as low as possible eg 60 to maximise the number of bytes than can be corrected per codeword without adding too much overhead In this extreme example it can correct one byte in six t n but the overhead is 50 overhead n k...

Страница 235: ...erating Handbook 8 24 Practical values for Reed Solomon code rate will depend on the amount of overhead the circuit can tolerate For overheads between 1 6 and 30 the table below gives practical values of n k t with the error correction at its maximum ...

Страница 236: ...ction in the processing delay associated with Reed Solomon FEC is the prime goal In such circumstances use the Custom Features feature and select shorter codewords to reduce the encoder decoder interleaver de interleaver delay For example switching from Intelsat standard values of n k t 126 112 7 to 64 56 4 provides approximately the same correction ability 7 in 126 5 5 and 4 in 64 6 25 respective...

Страница 237: ...shows how the symbol rate is built up from the data rate Relationship Between Data Rate and Symbol Rate You will see that with 1 2 rate FEC and QPSK a common combination the Symbol Rate is the same as the Data Rate assuming no Framing or Reed Solomon This is a useful combination to check on any data sheet as this will give you the Symbol Rate limits of the modem from which the Data Rate limits in ...

Страница 238: ...this is unchanged unless Minimum Overhead mode is selected in which case the overhead will vary up or down from the standard 1 15th to accommodate whatever Baud rate is set on the ESC Rate screen In all IDR modes the ESC channel is an 8kbps synchronous channel and if the ESC port is set to provide an async interface the exact maximum continuous async rate is Baud Rate 8000 x Bauds per Character 9 ...

Страница 239: ... 19200 Baud n a n a 50 10 5 4 76 2 5 2 38 1 25 1 19 38400 Baud n a n a 100 20 10 5 4 76 2 5 2 38 The formula for deriving the overhead rate is moderately complex and relies on many different parameters For other mixes of data rate and async settings the simplest way to determine the overhead is to enter the parameters into a modem and then select View Config Tx Rx This screen shows the exact overh...

Страница 240: ... this same Carrier Noise ratio at the input of the demod in terms of the Energy per Symbol Noise power density which is written as Es No Because Carrier Noise is a ratio of two powers measured in the same bandwidth the resolution bandwidth of the analyser this is the same as Es No Within the demodulator each Symbol is converted back into the Transmitted Bits For BPSK each Symbol represents only 1 ...

Страница 241: ...aming are ignored as Intelsat chose to define the mandatory modem performance in terms of Eb No specifying that this relates to the Composite Information Bit Rate ie it includes framing Baseband processing has no effect on bandwidth and is totally ignored Practical Implications of Displayed Eb No Practically this means the following For a constant Tx Power you will get the same displayed Eb No wha...

Страница 242: ...ing framing to a Closed Network link would increase the bandwidth decrease the Carrier Noise decrease the displayed Eb No as it does not compensate for framing and therefore degrade the BER However when brought back to the same Eb No you do of course recover the same BER Framing therefore does not degrade the BER for a stated Eb No but it does require more power and bandwidth to achieve the same E...

Страница 243: ...Quantum and Evolution Series Installation and Operating Handbook 8 32 Eb NoExplanatory Diagram ...

Страница 244: ...0dB 3 4 Rate 1 25dB 7 8 Rate 0 58dB 2 3 Rate 1 76dB Adjust for RS Codec n k t 126 112 7 0 51dB 219 201 9 0 37dB 225 205 10 0 40dB 5 0 5 2 5 4 5 6 5 8 3 35 3 64 3 92 4 20 4 47 6 0 6 2 6 4 6 6 6 8 4 74 5 01 5 27 5 53 5 78 7 0 7 2 7 4 7 6 7 8 6 03 6 28 6 53 6 77 7 01 8 0 8 2 8 4 8 6 8 8 7 25 7 49 7 72 7 95 8 19 9 0 9 2 9 4 9 6 9 8 8 42 8 64 8 87 9 10 9 32 10 0 10 5 11 0 11 5 12 0 12 5 13 0 13 5 14 0 ...

Страница 245: ...b 0 15 5 16 0 16 5 17 0 17 5 18 0 18 5 19 0 19 5 15 38 15 89 16 40 16 91 17 42 17 93 18 44 18 94 19 45 20 C N N error 0 04dB Example 8SPK with 2 3 Rate TCM FEC RS 219 201 9 C N N 8 4dB C N 7 72dB 8PSK so subtract 4 77dB 2 3 Rate FEC so add 1 76dB RS Code 219 201 9 so add 0 37dB Measure Look up Calculate Eb No C N 2 64dB ...

Страница 246: ... C purposes an IP address and subnet mask must be set Note that settings an IP address of 0 0 0 0 causes the modem to request an IP address from a DHCP Dynamic Host Control Porotocol server on the network Typically an external router will be required to perform complex network IP routing functions such as dynamic routing Static routes are supported allowing routing decisions to be made based on a ...

Страница 247: ...hen the IP traffic port and M C port must be on different subnets because otherwise the modem does not know which of the two ports to respond out of 1 32 2 1 Gateways The key to understanding the default gateways on the modems is being aware that there is one TCP IP stack running on a processor on the base modem and if fitted one TCP IP running on a processor on the IP Traffic card and that there ...

Страница 248: ...over satellite when routing mode is used The base modem will only ever use the M C gateway If the M C port is out of the bridge with no IP traffic card fitted then the M C gateway is applied to the IP traffic port if required then an M C gateway must be set up using a static route in this case 1 32 3 Throughput Performance Actual throughput performance depends on a number of factors including one ...

Страница 249: ... to the internet When used for IP the ESC channel runs in bridge mode with the M C port being bridged to the ESC channel Since the ESC channel acts as a bridge some bandwidth may be consumed by broadcast traffic finding its way onto it and it is best to minimize this if possible The modem allocates private IP addresses to the two ends of the ESC link no user address set up is required The ESC chan...

Страница 250: ...ut this does not prevent it being used for other purposes at the same time the AUPC messages are just multiplexed in with the other data 1 32 6 IP Interoperability Over satellite the modem uses HDLC to encapsulate the Ethernet frames or IP packets unless DVB S2 is being used in which case another form of encapsulation is used such as MPE or ULE If Cisco HDLC is selected on the modem then the recei...

Страница 251: ...the modem passes IP packets transparently as if the modem is not actually there The bridge learns which interface terrestrial or satellite devices are attached to and consequently only forwards packets over satellite when required IP packet contents are unchanged going over the bridge the source Ethernet MAC address will be changed to the modem s MAC address which is normal Because the modem does ...

Страница 252: ... as being on the local terrestrial side of the network It does not matter what subnetting is used at the remotes the devices can be on one or many subnets unless o TCP acceleration or header compression is also being used in which case all the modems need to be on a single subnet o When routing is used all the modems need to be on a single satellite subnet but you can use different subnets on the ...

Страница 253: ...the PC TCP window size regardless of the actual traffic bandwidth available over satellite Because the satellite delay is taken as evidence of link congestion TCP throttles back the amount of data it sends Acceleration allows approx 90 utilisation of whatever the available traffic bandwidth is over satellite Acceleration can be used in point to point and point to multipoint bridging modes as well ...

Страница 254: ...ent pipe for data so the data that is finally received at the destination on the terrestrial network at the far end of the link is identical to that which has been supplied to the local modem for transmission over satellite This is not necessarily true for IP data Being packet based IP naturally supports multiplexing of different data streams These streams often have different inherent priority le...

Страница 255: ...er priority The priority setting also controls latency and jitter In the situation where the transmit modem has several packets in its input buffer waiting for transmission over satellite then the packets will be sent based on their priority with the highest priority being sent first Packets are buffered up to a limit after which packets may be dropped The priority value ranges from zero to seven ...

Страница 256: ...y be classified as part of the data stream if both the address and the port number match A maximum of 16 data streams are supported each of which has its own CIR BIR and priority level settings The following example shows a traffic shaping scheme based on matching on source address and source port number Note the Enable shaping checkbox which controls whether traffic shaping is enabled or not As c...

Страница 257: ...higher priority When the BIR of Class 1 is reached the remaining spare bandwidth will be allocated to Class 2 1 32 9 4 2Diffserv DSCP Class It is possible to classify data streams based on the Differentiated Services Code Point DSCP value in the IP packet header The DSCP class bits are the top three bits of the DS field in an IP header the other three bits of the field indicate drop precedence whi...

Страница 258: ...t have this field set to the appropriate value in order for the modem to recognize the different data streams Note that the modem includes support for IEEE 802 1p priority tagging as an alternative QoS scheme to traffic shaping in its own right In this case the packets must already be tagged at the point of entry to the modem It is a layer 2 feature that uses 8 classes of data 3 bit field to prior...

Страница 259: ...trict priority queuing all packets in high priority queue are processed before any in medium priority queue which in turn are processed before any in the low priority queue For Fair weighting queuing for every 4 packets sent from high priority queue 2 are sent from medium queue and 1 from low priority queue The following example shows a traffic shaping scheme based on priority tagging 1 32 9 4 4MP...

Страница 260: ...HTTP Web Acceleration HTTP web acceleration speeds up the display of web pages Web pages are made up of multiple objects Each in line image is a separate object and web browsers typically fetch each in line object sequentially one at a time once the skeleton web page has been received Some browsers will start a second TCP connection so two objects can be fetched in parallel A typical web page with...

Страница 261: ...n dynamic routing is on traffic will be automatically routed across satellite correctly by automatic exchange of routing information with other routers The routing information exchange uses satellite bandwidth and is therefore an overhead The amount of bandwidth required depends on the size of the routing tables that are exchanged and the frequency with which they are exchanged Dynamic routing is ...

Страница 262: ... bytes best case This represents more than a 60 bandwidth reduction There is support for per route configuration control where you can specify up to 32 source or destination IP addresses only packets with one of these addresses get directed through the compressor Header compression runs up to 29000 packets per second one way 22000 packets per second two way on the IP Traffic card 1 32 13 VLAN Oper...

Страница 263: ...as normal at the hub and remote modems Set a VLAN id at the remote modem that represents the data stream to be pulled off At the hub set the VLAN id of the VLAN that you want to accelerate note this is the full 16 bit VLAN field value from the IEEE 802 1q header not just the 12 bit VLAN id portion The IP traffic addresses of the modems must be on the same subnet as the selected VLAN Only packets c...

Страница 264: ... fades Should the link be lost then the minimum modcod is automatically selected in order to re establish the link The transmitter can switch between any two modcods it does not have to go through them in sequence Since ACM can work all the way down to a negative Es No i e below what the link was designed for it effectively gives 100 link availability albeit at a reduced data rate Note that with D...

Страница 265: ...the nominal data rate of the link i e for a fixed modcod The Ethernet Pause frame does not help in any way with external traffic shaping its purpose is purely to minimize any packet loss at the point in time when a modcod change occurs It is therefore strongly recommended to use the modem s internal traffic shaping feature in conjunction with ACM Note that ACM works to the full symbol rate of the ...

Страница 266: ...und with an SCPC return or an SCPC outbound with a DVB S2 return DVB S2 outbound and return SCPC outbound and return SmartLink mode where SCPC features are combined with DVB S2 space segment savings All traditional SCPC features such as IBS IDR Drop and Insert ESC AUPC etc are supported DVB S2 does not directly support any of these SCPC features and therefore SmartLink was developed to allow exist...

Страница 267: ...rk as this does not add any extra framing to that provided by DVB S2 DVB S2 is provided as a Tx Rx service option whereas SmartLink is provided as an SCPC FEC option once an SCPC service has been selected Currently the only terrestrial interface that is interoperable with other vendors equipment when running a pure DVB S2 service is the IP interface IP is supported on the base modem when in SCPC a...

Страница 268: ...raming overhead DVB S2 with IP is supported directly from the Tx and Rx service menu options Once DVB S2 or SmartLink has been enabled various other configuration menu options become available including choice of modulation and FEC rate as well as DVB S2 FEC frame size choice and DVB S2 pilots DVB S2 pilots introduce a regular burst of unmodulated carrier that helps the demodulator lock onto the s...

Страница 269: ...l This is depicted in the diagrams below Frequency Re use by Overlaying Carriers The Paired Carrier processing in the modem to cancel the unwanted signal in the composite received signal to be left with only the desired signal is shown in the diagram overleaf The signal cancellation algorithm estimates and compensates for gain frequency phase and delay in matching the unwanted component of the com...

Страница 270: ... similar antenna sizes and use similar power levels at each end of the link whereas asymmetric links wil typically use a larger antenna at one end of the link and a smaller antenna at the other end with dissimilar power levels In the asymmetric case the system can be designed to require signal cancellation at only one end of the link with the unwanted signal at the other end being reduced to a lev...

Страница 271: ...ed if you require to cancel multiple carriers appearing within the cancellation bandwidth Q Can Paired Carrier handle asymmetric carriers that is carriers with different data rates and or different symbol rates on transmit and receive A Yes the Paired Carrier can handle asymmetric carriers The transmit and receive parameters are totally independent Q My transmit and receive carrier levels off sate...

Страница 272: ...on process Also of course power is needed for the second carrier Q What prerequisites exist for using Paired Carrier A It requires a full duplex link where you must be able to receive your own uplink signal off satellite It works only with bent pipe transponders where there is no demodulation remodulation or cross strapping between transponders The transponder must do no more than filter frequency...

Страница 273: ...d Motorola The modems with Sat ABIS sit between the BTS and BSC Sat ABIS supports 1 1 redundancy with no external hardware Four Ethernet ports for future growth In relation to compression Sat ABIS Removes silence idle speech frames Removes idle data frames channels not assigned to calls Performs LAPD signalling optimization including compression of repetitive data patterns such as idle flags betwe...

Страница 274: ... Operating Handbook 8 63 Sat ABIS Web Configuration Screen Diagnostics in the form of the achieved compression ratio percentage of the available satellite bandwidth being used and the dropped TRAU count are available for Sat ABIS as shown overleaf ...

Страница 275: ... the hub The hub clock is used as a clock generator for HDLC framed data and the remote modem derives its clock from the satellite signal and generates a 2 048 MHz bearer to the BTS The bearer is looped by the BTS back into the remote for synchronised communications back to the hub As well as saving up to 50 bandwidth Sat ABIS as an embedded solution reduces box count Sat ABIS is compatible with F...

Страница 276: ...ncy While the default settings for FastLink achieve this balance two other modes are also available The first mode optimises performance for particularly low latency at the cost of a slight increase in Eb No required to achieve a specific BER The second mode optimises BER performance and is suitable when latency is not an issue e g when higher data rates are being used This flexibility means that ...

Страница 277: ... 5 5 9 517 133 69 8PSK 0 778 5 7 6 1 6 6 517 133 69 8QAM 0 639 4 5 4 8 5 1 517 133 70 8QAM 0 710 5 5 4 5 7 517 133 70 8QAM 0 778 5 6 5 9 6 3 517 133 70 16APSK 0 726 See Note 3 520 134 73 16APSK 0 778 See Note 3 520 134 73 16APSK 0 828 7 7 8 2 8 5 520 134 73 16APSK 0 851 8 8 5 8 9 520 134 73 16QAM 0 726 Note 4 7 5 7 7 519 136 70 16QAM 0 778 7 7 6 7 9 519 136 70 16QAM 0 828 7 5 8 0 8 2 519 137 71 16...

Страница 278: ...e interference is sufficient to reduce the Es No of the carrier by around 4dB but is not obvious by looking only at the received carrier spectrum The modem I Q constellation graph is also shown Example LinkGuard Web Screenshots without with Interference LinkGuard provides a menu option for setting a power spectral density threshold above which the modem will automatically alarm to indicate that a ...

Страница 279: ...erference so long as it can lock to the carrier This is a useful and convenient way of quickly confirming suspected cases of interference while keeping the service running Note that even when the level of interference is severe enough to prevent the demodulator from locking the spectrum graph will continue to show the interference along with the wanted signal although it will not be able to differ...

Страница 280: ...nagement Protocol SNMP messages This interface can be used in several ways Firstly a generic user entry application such as Telnet can be used to automatically send or manually enter PUP commands Secondly PUP messages can be encapsulated directly into TCP packets using the message format defined in the document Remote M C Specification for Quantum and Evolution Series Satellite Modems These must b...

Страница 281: ... 09 20 2A 54 03 3 Set the transmit power to a new value 20 The response has a value of s e t T I F T x I F P w r 2 0 02 19 01 09 73 65 74 20 54 49 46 54 78 49 46 50 77 72 20 2D 32 30 2A C6 03 02 08 01 09 20 2A 54 03 4 get the transmit power to prove that the change has been accepted The response indicates a value of 20 g e t T I F T x I F P w r 02 15 01 09 67 65 74 20 54 49 46 54 78 49 46 50 77 72...

Страница 282: ... modem A P3051 Link PCB may be required to connect to other interface cards 1 1 Operation The standard modem interfaces do not require hardware changes for 1 1 redundancy operation However the G 703 option interface needs to be configured by the front panel for 1 1 mode Normal or 1 1 The 1 1 G 703 mode control selects what happens when power is removed If the power is lost in Normal mode the G 703...

Страница 283: ...estrial then the following interface description applies Min Req Signal Description LVDS Name Circuit Number 25 pin Electrical Levels A B DATA CIRCUIT TOWARDS MODEM TX 9 Clock In TT 113 24 11 LVDS 9 Data In SD 103 2 14 LVDS Sig Valid In RS 105 4 19 LVDS Sig Accpt d Out CS 106 5 13 LVDS Int Tx Clock Out ST 114 15 12 LVDS DATA CIRCUIT FROM MODEM RX 9 Clock Out RT 115 17 9 LVDS 9 Data Out RD 104 3 16...

Страница 284: ... Marginal frequently then this is not a modem fault but an indication that you have a clocking problem external to the modem ie changing clock data phase a problem which would otherwise have caused untraceable data errors With the Tx Clocking Set to Tx Clock In the Data In signal is checked against the Clock In signal With the Tx Clocking Set to Internal or Rx the Data In signal is checked against...

Страница 285: ...e is a clocking problem external to the modem i e changing clock data phase a problem which would otherwise have caused untraceable data errors With the Tx Clocking Set to Tx Clock In the Data In signal is checked against the Clock In signal With the Tx Clocking Set to Internal or Rx the Data In signal is checked against the Int Tx Clk Out signal All signals are balanced differentially driven and ...

Страница 286: ...uality twisted pair screened cable but this rate is reduced as the connecting cables extend beyond 10m As an estimate assume the maximum rate halves as the distance doubles ie 5Mbps to 20m 2 5Mbps to 40m etc The input clock data phase is selected automatically reporting a Data Marginal warning whenever it has to switch phase If the modem reports Data Marginal frequently then this is not a modem fa...

Страница 287: ...al Ground SG 102 7 Ground B 9 Shield Protective ground FG 101 1 Screen A Device DTE Ready In DTR 108 20 RS232 H Device DCE Ready Out DSR 107 6 RS232 E Local Loop In LL 141 18 RS23 2 Remote Loop In RL 140 21 RS23 2 The maximum data rate is 10Mbps over good quality twisted pair screened cable but this rate is reduced as the connecting cables extend beyond 10m As an estimate assume the maximum rate h...

Страница 288: ...ies The interface type can be selected as Synchronous or Asynchronous Min Req Signal Description RS232 Name Circuit Number 25 pin Electrical Levels A B DATA CIRCUIT TOWARDS MODEM TX 9 Clock In DA 113 24 RS232 9 Data In BA 103 2 RS232 Sig Valid In CA 105 4 RS232 Sig Accpt d Out CB 106 5 RS232 Int Tx Clock Out DB 114 15 RS232 DATA CIRCUIT FROM MODEM RX 9 Clock Out DD 115 17 RS232 9 Data Out BB 104 3...

Страница 289: ...x carrier to be switched on and off by the Sig Valid In line CA by selecting Change Tx Modulator Carrier RTS Controlled For Asynchronous RS232 interface the Tx Rx AIS detectors and the data marginal detectors are automatically disabled to prevent any unwanted alarms The internal Tx clock output is also automatically used to provide a reference clock to the incoming Async data For best operation Pa...

Страница 290: ...r 100 110 120Ω then the following pinout applies Min Req Signal Description 25 pin Electrical Levels A B DATA CIRCUIT TOWARDS MODEM TX 9 Data In 2 14 G 703 DATA CIRCUIT FROM MODEM RX 9 Data Out 3 16 G 703 COMMON LINES Signal Ground 7 Ground 9 Shield Protective ground 1 Screen Line Code Line Length For both T1 and E1 G 703 cards the line code is set from the front panel after the electrical interfa...

Страница 291: ... supplied with the modem If IP is selected under Edit Unit Interface Terrestrial then the following interface description applies The modem supports two RJ45 Ethernet ports for IP and remote control ports The Ethernet automatically supports 10 100 data rates and uses CAT 5 Ethernet cable either straight or crossover depending upon whether the modem is connected directly to a host or hub switch The...

Страница 292: ...e source of the single clock from the modem as Satellite Internal or Station Clock Tx Clk In does not exist in X 21 and cannot be used The Tx clock should be set to Rx as the Tx data is clocked by the same clock as the Rx data The maximum data rate is 10Mbps over good quality twisted pair screened cable but this rate is reduced as the connecting cables extend beyond 10m As an estimate assume the m...

Страница 293: ... to take the single clock from the terrestrial by selecting Tx Clock In The Rx Clocks menu should also be set to return Rx data in time with the single Tx Clock by also selecting Tx Clock In No other combinations will work The maximum data rate is 10Mbps over good quality twisted pair screened cable but this rate is reduced as the connecting cables extend beyond 10m As an estimate assume the maxim...

Страница 294: ...n to 4800bps The low offset voltage Type 1 generator is not supported but as specified for use with older equipment in 1985 should not be an issue today The Type 3 is for data rates above 10Mbit s this physical interface is not currently supported Connectors pin assignments and communication protocols are not standardised in this MIL STD document FED STD 1030A may be considered equivalent to EIA R...

Страница 295: ...t 23 G I F Rx Data A output 11 G I F Tx Data B input 24 G I F Tx Data A input 12 Test Mode must be open circuit 25 Ground 13 Ground P3713 D type connector socket Pin Eurocom D1 Pin Eurocom D1 1 Ground 14 2 15 C G I F Tx Data A input 3 C G I F Tx Data B input 16 C G I F Rx Data A output 4 C G I F Rx Data B output 17 5 18 D I F Tx Clock A output modem 6 D I F Tx Clock B output modem 19 7 Ground 20 D...

Страница 296: ...5 CTS A 18 Local Loopback 6 DSR A 19 RTS B 7 Ground 20 DTR B 8 Rx Ready A 21 Remote loopback 9 Rx Clock B 22 DSR B 10 Rx Ready B 23 DTR B 11 Tx Clock B 24 Tx Clock 12 ETC B 25 Not used 13 CTS B P3713 D type connector socket This supports the P3702 G 703 card Pin G703 Balanced Pin G703 Balanced 1 Screen 14 Tx Data B 2 Tx Data A 15 3 Rx Data A 16 Rx Data B 4 17 5 18 6 19 7 Ground 20 8 21 9 22 10 23 ...

Страница 297: ...F Rx Clock A output Rx Ready B 11 3 D I F Rx Data B output Tx Clock B 12 2 Ground ETC B 13 1 Screen CTS B 14 25 Ground Tx Data B Tx Data B 15 24 G I F Tx Data A input ETC A 16 23 G I F Rx Data A output Rx Data B Rx Data B 17 22 Ground Rx clock A 18 21 D I F Tx Clock A output modem Local Loopback 19 20 G I F low rate enable RTS B 20 19 D I F Tx Clock A input DTR B 21 18 D I F Tx Data A input Remote...

Страница 298: ...r port Min Req Signal Description RJ45 Electrical Levels A B DATA CIRCUIT TOWARDS MODEM TX 9 Data In 1 2 G 703 DATA CIRCUIT FROM MODEM RX 9 Data Out 4 5 G 703 Line code is fixed as HDB3 for all ports The master clock source for all ports is the lowest active port number that is configured and connected For example if port one is being used then this provides the clock source for all other ports Th...

Страница 299: ... terrestrial multiplexed data to be aggregated onto a single satellite carrier Port 1 Port 2 Port 3 Port 4 E1 E1 E1 IP data E1 E1 E1 EIA530 data E1 E1 EIA530 data IP data Line code is fixed as HDB3 for all E1 ports Other electrical interface rates need to be a multiple of 64kbps and master timing is derived from the lowest active port number that is configured and connected Note that Quad E1 ports...

Страница 300: ...r Quantum and Evolution Series Satellite Modems Connector type 9 pin D female Pin Signal name Direction Name RS485 Name RS232 Paradise 1 Shield Gnd Shield Gnd Shield Gnd 2 3 Master B to modem RX B 4 Slave B from modem TX B 5 Shield Gnd Shield Gnd Shield Gnd 6 Slave A from modem TX A Tx data 7 8 9 Master A to modem RX A Rx data Pins 1 and 5 are both grounded on the modem ie Shield and Ground are in...

Страница 301: ...lows Unit 1 Unit 2 Pin 1 Screen Pin 1 circuit ground Pin 2 Pin 3 On Line signal 2 1 Pin 3 Pin 2 On Line signal 1 2 Pin 6 Pin 7 Fail signal 2 1 Pin 7 Pin 6 Fail signal 1 2 Keep this lead as short as practical and ensure it is screened to prevent spurious changeovers by noise induced in these high impedance signal leads Refer to the earlier section on 1 FOR 1 switching for details of 1 FOR 1 operati...

Страница 302: ...Transmit inhibit 8 Buffered direct AGC voltage This may be used as an antenna pointing signal when the demod is unlocked It responds to composite power in approximately a 2MHz bandwidth around the nominal Rx carrier frequency 14 Not connected 15 Ground To externally inhibit the Transmit carrier either apply a TTL CMOS low signal to pin 7 or short pin 7 to ground for example with an external relay ...

Страница 303: ...ferential Station Clock This provides a RS422 compatible station clock in addition to the unbalanced 75Ω station clock BNC connector Async Port for ESC or Aux Channels The modem has two fully independent data channels that may be carried over the satellite within any overhead that is added These are referred to as the ESC and Aux channels The shared interface on this connector allows the use of on...

Страница 304: ...as separate ports for ESC Aux channels both ESC and Aux channels ie high rate async ESC Intelsat low rate ESC cannot be used simultaneously In IDR Mode this port is not used as when the IDR option is fitted separate ESC and Aux ports on the IDR card replace this shared ESC Aux port Refer to the definitions of the ESC Aux ports on the 50 way IDR ESC Aux Backward Alarm connector on the following few...

Страница 305: ...a in 14 U U Tx ESC Data in B n c 32 U Rx ESC Clock out A Rx ESC Clock out 33 U Rx ESC Clock out B n c 15 U U Rx ESC Data out A Rx ESC Data out 16 U U Rx ESC Data out B n c 46 U Tx ESC Octet out A Tx ESC Octet out 47 U Tx ESC Octet out B n c 48 U Rx ESC Octet out A Rx ESC Octet out 49 U Rx ESC Octet out B n c 17 U U Ground Ground U indicates lines are optional In Closed Net Plus ESC mode the variab...

Страница 306: ...he aux port is not used In IBS modes the Aux port can be set to both Intelsat using TS32 bit 1 and Sync modes selectable to use any of TS16 TS32 bits 1 5 8 TS48 In both modes a clock is provided and the port can be used synchronously with the clock or asynchronously allowing the async data to be oversampled by the higher rate clock In this oversampled mode as specified by Intelsat the Baud rate is...

Страница 307: ...dBm set independently from the front panel Audio is encoded as 32kbps ADPCM or 16kbps ADPCM in some custom modes The Audio ports may be used in two applications In IBS modes if set to emulate a P1348 P1448 Audio Data mux card the ESC ports provide the equivalent of the two audio ports on the P1348 P1448 ie can transmit 64kbps 2 audio channels or 128kbps 2 audio channels plus 64 kbps data from main...

Страница 308: ...hen any backward alarm is received this does fall back to the Fail state when power is removed Backward alarm inputs float to the Good state high 5V and indicate Fail when connected to 0V The Rx summary fault is an open collector output 0V Fail open collector OK From the front panel the backward alarm inputs BA x can be set as follows E Ext A Auto Rx fail O OK Menu Opt BA 1 BA 2 BA 3 BA 4 Mode 1 E...

Страница 309: ...s the normal single IBS backward alarm status mirrored by the unit deferred alarm For multidestinational IBS carriers it is possible to operate the modem in IBS mode but use 4 separate backward alarms as per IDR From the front panel select Service as Other based on IBS and follow the screen prompts ...

Страница 310: ...y Actions To Terrestrial TA AIS in selected timeslot if the Insert MUX is active or AIS over all data if not in Insert mode If Insert mode is active and the user control thin route spoofing is on then AIS is forced over the whole PCM bearer not just the selected timeslots to spoof full bearer connectivity when passed over a Thin Route satellite circuit TB Frame Backward alarm TC AIS forced in the ...

Страница 311: ...isation is lost check the modem is not set to expect a CRC and is forcing frame re acquisition when CRC is lost but there is no CRC on the PCM signal T TB SA SC Tx fault Dropped data is all ones AIS indicating upstream equipment fault The specific timeslots dropped by the Drop MUX contain all ones AIS This is different to the Tx Fault Data input is all ones AIS message described above which refers...

Страница 312: ... specified Quad E1 card terrestrial ports Tx fault Drop mux fault on ports 1 to 4 Quad E1 card data input fault when trying to drop specified timeslots from specified E1 ports onto transmitted carrier Tx fault FastLink Aligned frame FIFO overflow FastLink error whereby FEC is unable to process the data to be transmitted due to an internal buffer overflow Tx fault FastLink Uncoded FIFO overflow Fas...

Страница 313: ... attenuator D Tx warning Tx exceeds 4 5Mbps limit in TPC 5 16 Configuration error data rate for FEC scheme exceeded Tx warning Tx exceeds 6 5Mbps limit in TPC 21 44 or 2 3 Configuration error data rate for FEC scheme exceeded Tx warning Tx exceeds 7 7Mbps limit in TPC 1 2 Configuration error data rate for FEC scheme exceeded Tx warning Tx exceeds 12Mbps limit in TPC 7 8 Configuration error data ra...

Страница 314: ...op Insert modes Check as follows for each use 1 The Tx modem is set to operate in CAS mode if CAS signalling is to be conveyed within the IBS SMS overhead 2 If the Tx modem cannot use a CAS Multiframe to maintain the TS identity for the Odd values of N then to prevent this modem seeking a CAS multiframe for one of these values set timeslot identity to Do not maintain 3 If the Tx modem cannot use a...

Страница 315: ...seband sync lost This is a DVB S2 error when valid DVB S2 baseband frames are not detected in the DVB S2 satellite frames This could be due to corruption due to interference poor signal etc Rx fault No ABIS traffic No valid ABIS data has been detected Rx fault No transport traffic This is a DVB S2 alarm indicating that no valid MPEG2 transport stream packets were detected within the received DVB S...

Страница 316: ...scheme exceeded Rx warning Rx data rate outside interface range Configuration error data rate for terrestrial interface exceeded Rx warning The distant Eb No has fallen below the user threshold D Rx warning The receive Eb No is worse than the user threshold set for the deferred alarm D Rx warning Rx symbol rate outside range The modems current configuration exceeds the permissible symbol rate chec...

Страница 317: ...t from the modem is connected to the upconverter equipment and onwards and monitor the Tx carrier or distant Rx if possible with a spectrum analyser D Rx warning Backward alarm at Insert MUX indicating equipment downstream of Rx has failed This will only be displayed if the modem if fitted with an interface that provides four ports for separate input and output of separate Tx Drop and Rx Insert PC...

Страница 318: ... when the selected Rx clock fails has also failed Contact technical support for advice U TA TC RF Unit fault Communications with the BUC have failed Check connections Unable to communicate with the BUC check BUC type services are correctly configured U TF Unit fault BUC PLL failure The PLL in the BUC is reporting out of lock Check reference clock U TF Unit fault BUC over temperature failure The BU...

Страница 319: ...F features s will expire in less than 48 hours Indicates that one or more SAF features such as Paired Carrier that have been purchased on a temporary license are about to expire A new purchase order should be raised if the features are still required 1 44 Start up problems Fault Text Notes Relays To Ter To Sat Other Unit fails to boot due to an invalid configuration but passes the initial built in...

Страница 320: ...andard base modem IP User Traffic Data Rate Note all data rates are modem specific see datasheets for specific modem data rates 4 8kbps 2Mbps Extends base operation to 5Mbps Extends 5Mbps to 10Mbps Extends 10Mbps to 20 or 25Mbps Extends 25Mbps to 55Mbps PD55 Extends 25Mbps to 60Mbps PD60 Extends 60Mbps to 100Mbps PD60 Extensions are cumulative User Traffic Data Rate Resolution 1bps Note The combin...

Страница 321: ...93 Paradise 2 3 3 4 0 789 Paradise 7 8 Paradise 7 8 de facto 0 93 Paradise 8PSK 3 4 de facto 7 8 de facto 0 93 Paradise 16QAM 3 4 de facto 7 8 de facto 0 93 Paradise Viterbi BPSK O QPSK 1 2 3 4 7 8 TCM option 8PSK 2 3 Sequential option BPSK O QPSK 1 2 3 4 7 8 Outer Forward Error Correction Concatenated Intelsat Reed Solomon Outer Codec to IESS308 310 with Custom Option offering variable code rate ...

Страница 322: ...S compliant α 0 35 α 0 25 α 0 20 Occupied Bandwidth 1 2 times Symbol Rate Recommended Channel Spacing 1 4 times Symbol Rate Phase Accuracy 2º maximum Amplitude Accuracy 0 2dB maximum Carrier Suppression 30dBc minimum Output Phase Noise As IESS 308 nominally 3dB better IF Output Frequency Stability 1ppm yr L band Output Frequency Stability 7 5E 8 yr with high stability reference option IF Harmonics...

Страница 323: ...ng Measured Eb No range 0 15dB 0 2dB Measured Frequency Offset 100Hz resolution Wanted signal level strength indicator centred on the middle of the Rx Input range AGC Output Buffered direct AGC output for antenna tracking etc 1 48 Clocking and Buffering Specifications Parameter Modem Clock Integrity Frequency Locked Loops give phase hit immune operation even with poor clock sources such as routers...

Страница 324: ...aming and Deframing Specifications Parameter Modem Closed Network Format Unframed no overhead IBS SMS Option Format Intelsat IBS to IESS 309 and IESS 310 up to 10 Mbps and Eutelsat SMS to EESS501 IDR Option Format Intelsat IDR to IESS 308 and IESS 310 up to 10 Mbps Closed Network plus ESC Format Provides variable rate asynchronous ESC optional synchronous scrambler above 32kbps to replace error mu...

Страница 325: ...ay on low data rate circuits Up to 10Mbps 1 51 Drop and Insert Option Specifications Parameter Modem Bearer Types T1 D4 T1 ESF and E1 G 732 Timeslot Selection Independent selection of arbitrary timeslots for both drop and insert Bearer Generation The terrestrial bearer may be looped through the Drop Mux then Insert Mux or terminated after the Drop Mux and a new blank bearer generated by the insert...

Страница 326: ...nal working Timeslot ID Maintenance The IBS SMS or Closed Net Plus ESC is extended to maintain the identity of individual timeslots for all values of N from 1 to 31 Signalling Both Channel Associated Signalling CAS and Robbed Bit Signalling RBS are fully supported For G 732 Drop Insert CAS signalling is extracted from terrestrial TS16 and carried over the satellite in IBS SMS TS16 and TS48 before ...

Страница 327: ...rom 0 2 to 5 1 of the terrestrial rate e g up to 2400 baud at 64kbps Includes modes compatible with the P300 and P400 Series P230 P1300 P1361 using 20 32nd of the overhead IBS Aux Data Channel With IBS option and Advanced Aux option Intelsat low rate async ESC definition carried in bit 1 of TS32 providing a synchronous channel at 1 480th of the data rate allowing up to one quarter of this rate for...

Страница 328: ...d data lines IDR Provides 32 or 64kbps access in place of one or both audio ESC channels IBS Intelsat low rate ESC mode as previously but now via Aux port on IDR card not shared ESC Aux port of base unit IDR option also adds sync IBS mode configurable to use between 1 32nd and 21 32nd of the IBS overhead providing a full sync Aux port at between 0 2 and 4 3 of the main data rate Aux port provides ...

Страница 329: ...nd Closed Network plus ESC carriers ESC from 300 baud i e overheads down to less than 1 User Parameters Target Eb No positive power offset negative power offset 1 57 Data Rate Specifications Maximum symbol rates are as follows PD10 IF 5 Msps PD10 L band 5 Msps PD20 IF 10 Msps PD20 L band 10 Msps PD25 IF 12 5Msps PD25 L band 12 5Msps PD55 IF 40Msps PD55 L band 40Msps PD60 IF 40Msps 37 5Msps for DVB...

Страница 330: ...25 2 60 8PSK TPC 0 93 26 8 60 16QAM TPC 3 4 28 8 60 16QAM TPC 7 8 33 6 60 16QAM TPC 0 93 35 8 60 DVB S2 QPSK 1 4 50 10 90 DVB S2 QPSK 1 3 65 7 18 77 DVB S2 QPSK 2 5 79 22 70 DVB S2 QPSK 1 2 98 9 25 32 DVB S2 QPSK 3 5 118 9 34 51 DVB S2 QPSK 2 3 132 3 38 44 DVB S2 QPSK 3 4 148 8 42 38 DVB S2 QPSK 4 5 158 8 45 00 DVB S2 QPSK 5 6 165 5 47 62 DVB S2 QPSK 8 9 176 7 51 56 DVB S2 QPSK 9 10 178 9 53 37 DV...

Страница 331: ... equipment rack Configuration Memories 20 configurations can be stored and recalled from the front panel or remote M C Memories can be labeled with text string to aid identification User Interface Clear and intuitive operator interface with plain English dialogue other languages supported Graphic display backlit high contrast wide angle LCD 17 key tactile full keyboard Remote Monitor and Control F...

Страница 332: ...P that do not require acknowledgements run at up to the maximum data rate of the modem unaccelerated TCP which requires acknowledgements will typically run at up to 128kbps per connection 80 Connections Sec 1 61 BUC LNB facilities Parameter Modem BUC Power Supply Options Mains input 48V DC 2A output 100W to BUC via Tx IFL Mains input 24V DC 4A output 100W to BUC via Tx IFL Mains input 48V DC 3 5A ...

Страница 333: ...volution Series Installation and Operating Handbook 13 14 1 62 Performance Graphs For FastLInk low latency LDPC BER curves please see separate datasheet on the Paradise Datacom web site at http www paradisedata com ...

Страница 334: ...Quantum and Evolution Series Installation and Operating Handbook 13 15 Modem Error Probability versus Eb No Viterbi Decoding ...

Страница 335: ...Quantum and Evolution Series Installation and Operating Handbook 13 16 Modem Error Probability versus Eb No 8PSK TCM with without Reed Solomon ...

Страница 336: ...Quantum and Evolution Series Installation and Operating Handbook 13 17 Modem Error Probability versus Eb No 2nd Generation Turbo Codec Note rate 7 8 is de facto ...

Страница 337: ...Quantum and Evolution Series Installation and Operating Handbook 13 18 Modem Error Probability versus Eb No for low latency Paradise TPC rate 7 8 ...

Страница 338: ...bability versus Eb No 8PSK Turbo 1 00E 09 1 00E 08 1 00E 07 1 00E 06 1 00E 05 1 00E 04 1 00E 03 1 00E 02 0 1 2 3 4 5 6 7 8 9 10 EbNo BER Rate 7 8 Spec Limit Rate 3 4 Spec Limit Test Conditions FEC Turbo Rate 2048kHz 8PSK Tx 70 000 MHz Rx 70 000 MHz Scrambling Normal Turbo Input Level 45 ...

Страница 339: ...Quantum and Evolution Series Installation and Operating Handbook 13 20 Modem Error Probability versus Eb No 16QAM Turbo ...

Страница 340: ... 00E 06 1 00E 05 1 00E 04 1 00E 03 0 1 2 3 4 5 6 7 8 9 10 11 12 EbNo BER Paradise 16QAM Typ Paradise 16QAM Spec Paradise 8PSK Typ Paradise 8PSK Spec Paradise QPSK Typ Paradise QPSK Spec Comtech 8PSK Typ Comtech 8PSK Spec Comtech QPSK Typ Comtech QPSK Spec Modem Error Probability versus Eb No Turbo Rate 0 93 versus Comtech Turbo Rate 0 95 ...

Страница 341: ...Quantum and Evolution Series Installation and Operating Handbook 13 22 Modem Error Probability versus Eb No Sequential Decoding at 64kbps ...

Страница 342: ...Quantum and Evolution Series Installation and Operating Handbook 13 23 Modem Error Probability versus Eb No Sequential Decoding at 2048kbps ...

Страница 343: ...used to indicate whether a continuous 2048kbps traffic stream is formatted as G 732 or not CAS This option specifies whether Channel Associated Signalling CAS information is present in Timeslot 16 TS order This controls whether timeslot reordering is allowed Drop mode This specifies the framing format for Drop MUX operation G732 sig This option controls whether CAS information is processed and rou...

Страница 344: ... frame insertion Edit Tx Baseband Advanced Framing CAS Screen Options CAS When CAS is selected the CAS will be conveyed from end to end of the link using the IBS overhead No CAS This indicates that a terrestrial CAS multiframe and abcd signalling nibbles for each timeslot are not present Consequently Timeslot 16 may be dropped inserted in a similar manner to other timeslots Factory default No CAS ...

Страница 345: ...eslots can be reordered within the G 732 frame prior to transmission In some applications this feature can remove the need for separate Digital Access Cross Connect DACCs equipment that is used to re arrange timeslots Edit Tx Baseband Advanced Framing Drop Mode Screen Options G 732 T1 D4 T1 ESF Factory default G 732 Description Bearer type selection for Drop MUX operation Remap timeslot order Do n...

Страница 346: ...timeslot being used for signalling in frames 6 and 12 D4 or 6 12 18 and 24 ESF of the terrestrial multiframe Factory default No RBS Description Specifies whether Robbed Bit Signalling information is present in the traffic source When selected drop insert data is placed into the bearer by the insert MUX in the same frames from which it came It is still possible to drop from and insert into differen...

Страница 347: ...732 frame does contain a checksum that should be checked for errors If enough errors accumulate then a Tx Drop MUX BER alarm will be raised Input BER 1E 3 Factory default Ignore CRC Description This option is applicable only with G 732 Drop Insert bearers and controls the processing of any terrestrial checksum Edit Tx Baseband Advanced Framing CRC Frame Re acquisition Screen Process bearer CRC Ign...

Страница 348: ...ntation of ITU G 704 is carried out forcing re acquisition of the terrestrial Drop Insert frame synchronization if CRC synchronization cannot be achieved within 8ms Edit Tx Baseband Advanced Timeslots Menu This menu contains the following options Number used This controls the number of timeslots dropped off the terrestrial bearer and sent over the satellite Timeslots This option is used to select ...

Страница 349: ...ESF timeslot numbers 1 24 are used Timeslots can be entered as individual numbers separated by commas or as an inclusive range denoted by the first and last timeslot numbers in the range with a hyphen between them For example 0 18 31 17 16 1 swops timeslots groups 18 to 31 with 1 to 16 and additionally reverses timeslots 1 to 16 Note that on this screen the Down arrow key is used to enter a comma ...

Страница 350: ... Installation and Operating Handbook 14 8 remain on this screen Note that when a valid sequence of timeslot numbers is accepted it may take several seconds for the display to update due to the level of internal processing involved ...

Страница 351: ...Tx Baseband Advanced Timeslots Idle Code Screen Options Leave on bearer The Tx data remains on the bearer and will be accessible to downstream equipment unless Rx data is inserted over it Replace with Idle code The Tx data is replaced as follows MSB to LSB G 732 timeslots are replaced with 01010101 G 732 CAS in TS16 is replaced with 0101 if CAS signalling is active T1 D4 and T1 ESF timeslots are r...

Страница 352: ...creens that configure all aspects of the overhead IBS SMS This controls the overhead in IBS SMS mode allowing both the low and high rate ESC channels to be set up The different options are presented as a sequence of screens that configure all aspects of the overhead IDR This controls the overhead in IDR mode allowing the IDR 8kbps ESC channel and audio channels to be set up and the routing of mult...

Страница 353: ...nsecutively when the Closed ESC overhead option is selected ESC interface baud rate 9600 baud New 9600 baud ESC Baud Rate Screen ESC interface RS485 New RS485 ESC Interface Screen Enable backward alarm On 1 Off 2 On ESC Backward Alarm Screen ESC interface character length 8 bits 1 7 bits 2 8 bits ESC Character Length Screen ESC interface parity polarity None New None ESC Parity Screen ...

Страница 354: ...sections ESC Baud Rate Options 110 baud 150 baud 300 baud 600 baud 1200 baud 2400 baud 4800 baud 9600 baud 19200 baud 38400 baud 57600 baud 76800 baud 115200 baud Factory default 9600 baud Description Sets the baud rate of the ESC UART IBS SMS Aux mode Off New Off Aux interface RS485 1 RS232 2 RS422 3 RS485 4 IP Aux Interface Screen ...

Страница 355: ...actory default None Description Controls the ESC UART parity setting ESC Interface Options RS232 RS422 RS485 IP RS485 Local RS485 Remote IP to Serial Factory default RS485 Description Specifies which of the modem s physical interfaces is to be connected through to the satellite ESC channel Note RS485 is not available on the IDR card Note that the modem back panel Async ESC connector provides eithe...

Страница 356: ...M C messages are prefixed with ESC as described in the document Remote M C Specification for Quantum and Evolution Series Satellite Modems Both point to point and point to multipoint IP over the ESC channel are supported With point to point mode the modem will allocate internal IP addresses to each end of the ESC channel and these will only be visible internally within the modem In point to multip...

Страница 357: ... of the link The effect of Link Local is to transmit whatever is received over the satellite ESC channel out onto the local modem s M C bus while at the same time transmitting all incoming M C messages out over the satellite ESC channel The effect of Link Remote is to loop back whatever is received over the modem s satellite ESC channel to the modem s M C port and to transmit over the satellite ES...

Страница 358: ...IBS Aux channel controlling the allocation of overhead between the Aux and ESC interfaces AUX Interface Options RS232 RS422 RS485 IP Factory default RS232 Description Specifies the Aux electrical interface Note RS485 is not available on the IDR card The relevant physical interface on the shared Async ESC Auc port on the base modem or the separate Aux port on the IDR card is directly connected thro...

Страница 359: ...annel within the IBS SMS overhead Edit Tx Baseband Advanced Overhead IBS SMS Screens The following sequence of screens depending on what SAF options are enabled will appear consecutively when the IBS SMS overhead option is selected High rate ESC mode Asynchronous New Asynchronous High rate ESC Mode Screen High rate ESC usage Maximum overhead P230 compatible New Maximum overhead High rate ESC Usage...

Страница 360: ... ESC Character Length Screen Aux interface RS485 1 RS232 2 RS422 3 RS485 4 IP Aux Interface Screen IBS SMS Aux mode Off New Off Aux Mode Screen ESC level ch1 0 to 38dB 0 Step 2dB New 0 ESC Audio Levels Screen ESC Interface RS485 RS485 New RS485 ESC Interface Screen Enable backward alarm On 1 Off 2 On Backward Alarm Mode Screen ...

Страница 361: ...llows backward compatibility with Paradise P230 unit Requires Custom SAF feature Maximum ESC Baud Rate IBS SMS uses a fixed frame format and therefore the amount of overhead is limited This screen displays the maximum ESC baud rate that may be selected The actual selection of the baud rate is done on the next screen ESC Baud Rate ESC Character Length ESC Parity ESC Interface See the descriptions u...

Страница 362: ...Screens AUX Interface See the description under Edit Tx Baseband Advanced Overhead Closed Network Plus ESC Screens ESC Audio Levels Units dB Minimum value 0 Maximum value 38 Step size 2 Factory default 0 Description Sets the input output levels for the IDR audio ESC channels The two channels can be configured independently ESC Backward Alarm Options Off On Factory default Off Description Controls ...

Страница 363: ...f 1 Off 2 Asynchronous 3 Synchronous IDR 8k ESC Screen ESC interface baud rate 9600 baud New 9600 baud ESC Baud Rate Screen ESC interface character length 8 bits 1 7 bits 2 8 bits ESC Character Length Screen ESC interface parity polarity None None New None ESC Parity Screen ESC interface RS485 RS485 New RS485 ESC Interface Screen IDR ESC audio encoding 2x32K in V1 V2 2x32K in V1 V2 New 2x32K in V1...

Страница 364: ...ides up to a 9600 baud asynchronous channel Synchronous Factory default Off Description Controls the operating mode of the low rate IDR ESC channel IDR Aux data Off 1 Off 1 32K 2 64K IDR Aux Data Screen Backward alarm mode 1 4 external New 1 4 external Backward Alarm Mode Screen Aux interface RS485 1 RS232 2 RS422 3 RS485 4 IP Aux Interface Screen ESC level ch1 0 to 38dB 0 Step 2dB New 0 ESC Audio...

Страница 365: ...larms and an 8kbps synchronous ESC channel 2x16k in V1 Two 16kbps ADPCM channels are provided in V1 with V2 either being omitted or being replaced with Aux data as determined by the IDR Aux mode setting 1x32k in V1 32kbps is provided in V1 with V2 either being omitted or being replaced with Aux data as determined by the IDR Aux mode setting 2x32k in V1 V2 The normal full 96kbps of IDR overhead is ...

Страница 366: ... Aux data in place of one or both of the IDR voice channels if these are not used or can be used to reduce the 96k overhead to 64k or 32k Requires Aux SAF feature Aux Interface See the description under Edit Tx Baseband Advanced Overhead Closed Network Plus ESC Screens ESC Audio Levels Units dB Minimum value 0 Maximum value 38 Step size 2 Factory default 0 Description Sets the input output levels ...

Страница 367: ... 14 25 Factory default Backward alarm 1 4 external Description Controls routing of multiple backward alarms in IDR mode When internally linked from Rx Fail to BA1 or BA1 4 these alarms respond similarly to the normal single backward alarm Requires Custom SAF feature ...

Страница 368: ...tion LCD Liquid Crystal Display IBS Intelsat Business Service IESS Intelsat Earth Station Standard IDR Intermediate Data Rate M C Monitor and Control MIB SNMP Management Information Base MSC Mobile Switching Centre Mux Multiplexer OQPSK Offset Quaternary Phase Shift Keying PCB Printed Circuit Board PUP Paradise Universal Protocol PLL Phase Locked Loop PRBS Pseudo Random Bit Sequence PSTN Packet Sw...

Страница 369: ...phic area Repair Return Procedure Please refer to the equipment warranty statement for full details of returning equipment for repair or upgrade In summary 1 Ensure the equipment really does have a fault 2 Write an explicit fault report including what appears to be wrong the circumstances under which it occurs and what other equipment is involved 3 Provide an official Purchase Order to cover the c...

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