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Teledyne Q-Flex, Инструкция по установке и эксплуатации


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Q-Flex Satellite Modem Installation and Operating Handbook 

 

 7-37 

7.10 Paired Carrier™ 

Paired Carrier™

 can be used to reduce satellite bandwidth requirements by up to 50% 

by overlapping transmit and receive carriers in the same space segment. It uses ViaSat’s 
patented  PCMA  technology. 

Paired  Carrier™

  is  now  mature  fourth-generation  giving 

performance  second  to  none.  Adaptive  self-interference  cancellation  is  used  to  subtract 
the unit’s transmitted signal from the composiste received signal, leaving just the desired 
signal. This is depicted in

 Figure 7-15

. 

 
 

 

 

Figure 7-15  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  composite  Rx 
signal with a delay buffered version of its own transmission. 
 

 
 
 
 

Typical satellite transmission 
with 

separate 

frequency 

slots  for  the  uplink  and 
downlink. 

Using 

Paired  Carrier™

  with 

uplink  and  downlink  carriers 
overlaid, 50% can be saved on 
the cost of space segment.  

Содержание Q-Flex

Страница 1: ...e Matchyns Rivenhall 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 2013 2015 Teledyne Paradise Datacom Ltd All rights reserved Q Flex Satellite Modem Installation and Operating Handbook ...

Страница 2: ... 1 5 2 Standard Fit Hardware 5 2 5 2 1 IF L band Operation 5 2 5 2 2 Ethernet Operation 5 2 5 3 Hardware Options 5 3 5 3 1 Terrestrial Interface Option Cards 5 3 5 3 1 1 4 port Gigabit Ethernet Switch 5 3 5 3 1 2 G 703 Option Card 5 3 5 3 1 3 EIA 530 Option Card 5 3 5 3 1 4 STM 1 OC 3 Optical Ethernet Option Card 5 3 5 3 1 5 IDR Option Card 5 4 5 3 1 6 LVDS Option Card 5 4 5 3 1 7 HSSI Option Card...

Страница 3: ...2 4 13 Tx Rx Carrier Frequency 6 17 6 2 4 14 Tx Rx Spectral Roll off 6 18 6 2 4 15 Tx Rx Spectral Inversion 6 19 6 2 4 16 IF L band Output Power 6 19 6 2 4 17 Modem BUC Carrier 6 20 6 2 5 Edit Tx Rx Service Advanced Screen 6 20 6 2 5 1 DVB S2 Tx Rx Pilot Tones 6 20 6 2 5 2 DVB S2 Tx Rx Frame Size 6 21 6 2 5 3 Sweep Mode 6 21 6 2 5 4 Sweep Width 6 21 6 2 5 5 Acknowledge Power Break 6 21 6 2 5 6 Ree...

Страница 4: ...UC DC Current Alarm 6 39 6 2 10 6 LNB DC Current Alarm 6 40 6 2 11 Edit Unit Station Clock Screen 6 40 6 2 11 1 Station Clock Source 6 41 6 2 11 2 Station Clock Frequency 6 41 6 2 11 3 Locking the High Stability Oscillator to the Station Clock 6 42 6 2 12 Edit Unit SAF Screen 6 42 6 2 13 Edit Unit Upgrade Screen 6 43 6 2 14 Edit Unit Miscellaneous Time Screen 6 44 6 2 1 Edit Unit Miscellaneous Res...

Страница 5: ... 6 2 3 18 Tx Rx Symbol Rate 6 65 6 2 4 Edit IP QoS Screen 6 65 6 2 5 Edit IP Static Routes Screen 6 66 6 2 6 Edit IP Header Compression Routes Screen 6 67 6 2 7 Edit Paired Carrier Screen 6 68 6 2 7 1 Paired Carrier Enable 6 68 6 2 7 2 Round trip Delay 6 71 6 2 7 3 Satellite Longitude 6 72 6 2 7 4 Earth Station Longitude 6 72 6 2 7 5 Earth Station Latitude 6 72 6 2 7 6 Calculated Satellite Delay 6...

Страница 6: ...Reference 7 3 7 1 2 Receive Clocking 7 4 7 1 2 1 Satellite 7 4 7 1 2 2 Tx Clock In 7 4 7 1 2 3 Station Clock 7 5 7 1 2 4 Internal Clock 7 6 7 1 3 Guidelines for Clocking Configuration 7 6 7 1 3 1 Clock Loop at One End 7 6 7 1 3 2 No Clock Loop 7 7 7 1 3 3 Determining Buffer Size 7 7 7 1 3 4 G 703 Clock Extension 7 8 7 2 Automatic Uplink Power Control 7 8 7 2 1 Introduction 7 8 7 2 2 Configuring AU...

Страница 7: ...ces 9 1 Chapter 10 Connector Pinouts 10 1 Chapter 11 Fault Messages 11 1 11 1 Transmit Faults 11 2 11 2 Transmit Warnings 11 4 11 3 Receive Faults 11 5 11 4 Receive Warnings 11 7 11 5 Unit Faults 11 9 11 6 Unit Warnings 11 10 11 7 Start up Problems 11 10 Chapter 12 Specification Summary 12 1 12 1 Common Main Specifications 12 1 12 2 Tx Modulator Specifications 12 3 12 3 Rx Demodulator Specificatio...

Страница 8: ...Graphs 12 14 Chapter 13 Advanced Framing 13 1 13 1 Edit Tx Rx Framing Screen 13 1 13 2 Edit Tx Rx Framing Overhead Closed Screen 13 2 13 3 Edit Tx Rx Framing Overhead IBS Screen 13 4 13 4 Edit Tx Rx Framing Overhead IDR Screen 13 5 13 5 Edit Tx Rx Advanced Drop and Insert Screens 13 7 Chapter 14 Glossary 14 1 Chapter 15 Technical Support 15 1 ...

Страница 9: ...aspect of IP support from the ground up to ensure ease of use a high degree of integration between features and outstanding performance and efficiency Specifically XStream IP is the most advanced integrated suite of IP optimisation and traffic management features available in any satellite modem XStream IP is specifically optimised to be highly efficient and reliable over satellite XStream IP prov...

Страница 10: ... Paradise s SmartLink technology allows non packetized continuous traffic such as G 703 E1 traffic to be used with DVB S2 The Q Flex therefore provides a painless migration path to newer more efficient communications technology while fully supporting legacy services FastLink Low Density Parity Check LDPC Forward Error Correction FEC combines high coding gain with low latency FastLink can therefore...

Страница 11: ...ystem function 2 2 Trademarks All trademarks used in this handbook are acknowledged to be the property of their respective owners 2 3 Disclaimer Although every effort is made to ensure the accuracy and completeness of the information in this handbook this cannot be guaranteed and the information contained herein does not constitute a product warranty A separate product warranty statement is availa...

Страница 12: ...ernal voltages Never operate the unit with the cover removed This satellite modem must be directly connected to a protective earth ground at all times using the chassis ground stud situated on the rear of the unit The power system to which this satellite modem is connected must provide separate ground neutral and line conductors The power system must have a direct ground connection Note that the g...

Страница 13: ...rate in a static 19 inch rack system conforming to IEC 297 2 The equipment should not be directly connected to the Public Telecommunications Network Operation of the equipment in an environment other than that stated will invalidate the safety standards The equipment must not be operated in an environment in which it is exposed to Unpressurised altitudes greater than 3000 metres Extreme temperatur...

Страница 14: ... D type connectors must have grounding fingers on the plug shell to guarantee continuous shielding The back shells must comply with the requirements of VDE 0871 and FCC 20708 providing at least 40dB of attenuation from 30MHz to 1GHz A good quality cable with a continuous outer shield correctly grounded must be used Connections to transmit and receive IF interfaces must be made with double screened...

Страница 15: ...ranges from 40W to a maximum of 300W when a BUC PSU is fitted A power cord suitable for use in the country of operation is provided If the power cord needs to be replaced at any point then the replacement must be manufactured to an equivalent specification Compatible cable ratings include HAR BASEC and HOXXX X Compatible connector ratings include BS1636A BSI VDE NF USE UL CSA OVE CEBEC NEMKO DEMKO...

Страница 16: ...tatus information From the front panel menu select Main Edit All in order to set the configuration prior to operation It is also possible to set up the unit from a web browser as described in Section 7 4 When setting up a number of units that have similar configurations the configuration settings of one unit can be saved extracted and then transferred to each of the other units in turn This proced...

Страница 17: ...erface card multiplexes four E1 interfaces together onto a single carrier and also serial data G 703 and IP traffic to be multiplexed together onto a single carrier Automatic Uplink Power Control AUPC automatically adjusts modem output power to maintain a constant Eb No at the distant end of the satellite link Front panel display and keypad for local control Remote equipment can be controlled over...

Страница 18: ...d as standard IF operation via transmit and receive IF BNC connectors supporting 50Ω and 75Ω operation at 50 to 90MHz and 100 to 180MHz L band operation via transmit and receive L band N type connectors supporting 50Ω operation at 950 to 2150MHz A high stability L band 10MHz reference signal for output to a Block Up Converter BUC or Low Noise Block LNB in order to phase lock the BUC or LNB s local...

Страница 19: ...nced G 703 is provided on two BNC 75Ω sockets and balanced G 703 is provided on two RJ45 sockets The following software features are included as standard with the G 703 option card G 703 clock extension providing a high stability reference clock over satellite alternative to GPS In this mode the G 703 card is used purely as a high stability clock generator for some other traffic source such as ser...

Страница 20: ...standard 50 way SCSI 2 DCE connector 5 3 1 8 Quad E1 Option Card The Quad E1 option card part number P3706 supports four synchronous G 703 HDB3 encoded balanced RJ45 ports Along with full E1 bearers Drop and Insert of up to 32 timeslots is provided on all four interfaces The Quad E1 card and G 703 card are compatible when used for a single full E1 All data rates between 64kbps and 8448kbps are sup...

Страница 21: ...l required satellite bandwidth 5 3 3 BUC Power Supply Options The satellite modem may optionally be fitted with a Power Supply Unit PSU for powering a Block Up Converter BUC when operated in L band mode Refer to Table 5 1 for the available BUC power supply options Part Number BUC PSU Type P3543 200W 24V output A C in D C out P3544 200W 48V output A C in D C out P3545 48V input 200W 24V output D C ...

Страница 22: ...ghput levels for specific IP streams using Committed Information Rate and Burst Information Rate Stream differentiation is by IP address IEEE 802 1p priority class Diffserv DSCP class MPLS EXP field VLAN ID or PID value IP header compression Enables Ethernet TCP UDP IP and RTP packet header compression IP payload compression Enables TCP and UDP payload compression compliant to RFC 1951 DEFLATE Dyn...

Страница 23: ...t Frame Frame size of 5 400 bits reducing latency to 33 of standard DVB S2 Short frame supports QPSK 8PSK 16APSK 32APSK 2 5 7 15 8 15 3 5 2 3 11 15 4 5 13 15 14 15 Ultra Short Frame Frame size of 3 240 bits reducing latency to 20 of standard DVB S2 Short frame supports QPSK 8PSK 16APSK 32APSK 1 3 4 9 5 9 2 3 7 9 8 9 ClearLinQ Adaptive Tx Predistorter CLNQ Corrects for linear and non linear distort...

Страница 24: ...60Mbps PCML Enables Paired Carrier data rates in the given range Paired Carrier 60Mbps to 80Mbps PCMM Enables Paired Carrier data rates in the given range Paired Carrier 80Mbps to 100Mbps PCMN Enables Paired Carrier data rates in the given range Paired Carrier 100Mbps to 160Mbps PCMO Enables Paired Carrier data rates in the given range Optimised spectral roll off ROFF Enables 5 10 and 15 spectral ...

Страница 25: ...nd as described in Table 5 3 Figure 5 2 Front panel Status Indicators Off Red Amber Green Unit Status Not used Unit fault Not 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 1 standby Carrier active Table 5 3 Front panel LED Status...

Страница 26: ...ellite data interfaces Connector pinouts are defined in Chapter 11 Figure 5 4 Modem Rear Panel From left to right the rear panel consists of IEC Mains Power Connector Voltage Selector Fuse The modem is designed to operate from a mains AC supply of 100 to 240V 90 to 250VAC 1A 100V 0 5A 240V 47 to 63Hz The IEC connector incorporates two fuses independently fusing both live and neutral lines Access t...

Страница 27: ...ffic Prompt A Tx traffic fault exists Rx Traffic Prompt An Rx traffic fault exists Deferred Alarm One of the following conditions exists The receive Eb No is lower than the user defined threshold Buffer slips are more frequent than the user defined threshold A backward alarm is being received from either the satellite or terrestrial ports Async ESC Connector This is a 15 pin D type female connecto...

Страница 28: ...dBm to 16dBm for use in IDR operation These ports may also be used in IBS services to generate a 64kbps IBS carrier comprised of two 32kbps ADPCM audio channels or a 128kbps IBS carrier comprised of 64kbps data from the main data interface of the modem plus two 32kbps ADPCM audio channels An RS232 RS422 RS485 port for synchronous and asynchronous ESC traffic This port replaces the shared ESC Aux f...

Страница 29: ...xpel the air outwards The side vents must not be blocked 1 1 Redundancy Connector The modem has a built in 1 1 redundancy controller that connects to the other modem in the 1 1 pair via a 9 pin D type male connector A 1 1 redundancy system requires two modems a 1 1 control cable between the two redundancy connectors a Y cable for splitting the traffic path and passive splitters and combiners for t...

Страница 30: ...s been placed in a mode that restricts user control to the front panel only When using the M C interface an M C IP address including subnet mask and default gateway must be set An IP traffic address is not required when operating in Ethernet bridging modes IP addresses are described in Section 7 8 2 Station Clock This is a 75Ω BNC female connector that accepts a 1MHz to 10MHz signal either a squar...

Страница 31: ...same time Remote admin users who log in while the modem is under local front panel control will be restricted to view only permissions 6 1 1 Local Mode Local mode allows control of the modem from the front panel interface only Web users are still able to log in and view the modem settings in this mode 6 1 2 Takeaway Mode In Takeaway mode the modem can be controlled through the front panel or via a...

Страница 32: ...cable is connected into the Remote M C RJ45 socket on the rear of the modem From the modem front panel enter under Edit Unit M C IP Address an IP address and subnet mask that are compatible with your network Then enter the modem s IP address into the web browser address bar The browser will then request as shown in Figure 6 1 a user name and password The default admin and view only user passwords ...

Страница 33: ... control is restricted to front panel operation only The Status screen shown in Figure 6 3 will then be presented 6 2 2 Status Screen The Status screen is shown in Figure 6 3 Note that 1 N backup modems will show additional status information as defined in the document Installation and Operating Handbook for Quantum Evolution and Q Series Satellite Redundancy Switches which is available for downlo...

Страница 34: ...will change with the tab menu that is selected The panel on the left hand side of the web page contains summary status information and is always displayed This area is also used to display Help information when the cursor is moved over individual menu options The Light Emitting Diodes LEDs shown in the left hand panel mimic the front panel LED indicators of the modem Note that the web browser page...

Страница 35: ...s continually updated with the following information Transmit and receive carrier frequencies Transmit and receive terrestrial data rates Transmit and receive symbol rates In addition the following are shown Transmit carrier bandwidth at the 3dB point Transmit carrier bandwidth at the 30dB point These are useful for performing bandwidth comparisons between different modem configurations including ...

Страница 36: ...ut signal that can be used to mute the carrier under external control as required or some other problem being experienced with the terrestrial interface o Mute 1 1 the carrier is muted due to being the Standby modem in a 1 1 redundancy system o Mute Brk the carrier is muted following a power outage o Mute Flt the carrier is muted due to an alarm detected by the modem software o Mute Cfg the carrie...

Страница 37: ...or potential causes Paired Carrier frequency offset This is the measured offset between the expected centre frequency for the wanted carrier and the actual centre frequency An unexpectedly large offset may indicate a false lock where Paired Carrier is locked to something other than the wanted carrier Paired Carrier satellite delay This is the measured round trip delay to the satellite Once this va...

Страница 38: ...is shown as Failed if the link is not working correctly otherwise it will be shown as OK 6 2 2 6 Status BUC LNB Under the Status BUC LNB tab Block Up Converter BUC status is continually updated with the following information when a BUC is being controlled from the modem BUC output This is the output power in dBm at the waveguide flange or Off when the BUC is not transmitting BUC temperature This s...

Страница 39: ... also include a software upgrade factility IP This menu allows setup of the IP traffic interface Paired Carrier This menu allows the setup of the carrier overlap feature Memories These menus support the storing recall deletion upload and download of modem configurations Redundancy These menus are used to control modem 1 1 and 1 N redundancy 6 2 4 Edit Tx Rx Service Screen The Edit Tx Rx Service sc...

Страница 40: ...et traffic interface G 703 This enables the G 703 traffic interface Quad E1 This enables the Quad E1 traffic interface STM 1 OC 3 This enables the STM 1 OC 3 traffic interface and requires an STM 1 OC 3 Optical Ethernet interface card to be fitted The correct SFP transceiver module must be fitted to the interface card SFP cage Optical Ethernet This enables the Optical Ethernet traffic interface an...

Страница 41: ...hannel rate subject to a maximum size of 115kbps It also provides a backward alarm facility that notifies upstream equipment of faults detected by downstream equipment Closed network plus ESC allows individual timeslots to be processed when using the G 703 interface IBS Intelsat Business Service IBS is an open network standard where 1 15 framing overhead is added to the data This mode is compatibl...

Страница 42: ... symbol rate is calculated Symbol rate Tthis allows the user to enter a symbol rate from which a data rate is calculated Table 6 3 Tx Rx Rate Control 6 2 4 5 Tx Rx Data Rate Range 0 0048Mbps to 160 0Mbps step size 0 000001Mbps Description The terrestrial data rate is the maximum number of data bits that the modem will process in relation to the selected terrestrial interface The relationship betwe...

Страница 43: ...type and FEC rate The modem will generally prevent invalid data rates from being set and in the event that a limit is exceeded then a configuration warning will be generated Table 6 4 Tx Rx Data Rate 6 2 4 6 Tx Rx Symbol Rate Range 0 0096Msps to 45 0Msps step size 0 000001Msps Description As an alternative to setting the terrestrial data rate it is possible to set the symbol rate for the satellite...

Страница 44: ...arriers thereby preventing any similar patterns in the respective satellite frames particularly frame headers from interfering with each other Frame header clashes may show up as periodic Paired Carrier outages potentially many hours apart 6 2 4 8 Rx Clock Source Satellite This is the clock from the satellite This is converted to the rate required at the terrestrial port Tx Clock In This causes th...

Страница 45: ...g with only packetized data such as IP to working with any terrestrial interface Using SmartLink in Closed network provides a normal DVB S2 service with no additional overhead However SmartLink can also support the use of traditional service features not normally available with DVB S2 such as Drop and Insert ESC channel remote M C control AUPC IDR audio channels etc SmartLink is described in Secti...

Страница 46: ...3 45 9 20 11 20 8PSK 23 36 25 36 13 18 8APSK L 5 9 26 45 16APSK 26 45 3 5 28 45 23 36 25 36 13 18 7 9 77 90 16APSK L 5 9 8 15 1 2 3 5 2 3 32APSK 32 45 11 15 7 9 32APSK L 2 3 64APSK 11 15 7 9 4 5 5 6 64APSK L 32 45 Short Frame QPSK 11 45 4 15 14 45 7 15 8 15 32 45 8PSK 7 15 8 15 26 45 32 45 16APSK 7 15 8 15 26 45 3 5 32 45 32APSK 2 3 32 45 Very Short Frame Frame size of 5 400 bits reducing latency ...

Страница 47: ...ation from 950MHz to 2050MHz optionally to 2150MHz Table 6 10 Tx Rx Frequency Band 6 2 4 13 Tx Rx Carrier Frequency There are various frequency control options depending on whether IF or L band has been selected and whether a BUC or LNB is fitted that is being controlled via the modem The frequency control options are presented in Tables 6 11 through 6 14 Range 50 0MHz to 180 0MHz step size 0 0001...

Страница 48: ...the L band receive frequency will no longer be available and will be automatically controlled by the modem to achieve the requested LNB receive frequency Table 6 14 LNB Carrier Frequency 6 2 4 14 Tx Rx Spectral Roll off The spectral roll off determines the slope of the carrier at its edges The supported roll off factors are listed in Table 6 15 Range 5 10 15 20 25 35 Description All spectral roll ...

Страница 49: ...eing used If the ground segment uplink equipment contains a spectral inversion then transmit spectral inversion should be enabled in the modem to correct for it Similarly if the ground segment downlink equipment contains a spectral inversion e g due to an inverting LNB then receive spectral inversion should be enabled in the modem to correct for it 6 2 4 16 IF L band Output Power Range 0 0dBm to 2...

Страница 50: ...ice Advanced screen is shown in Figure 6 6 Figure 6 6 Edit Tx Rx Service Advanced Screen 6 2 5 1 DVB S2 Tx Rx Pilot Tones Pilots are an On Off control that controls whether DVB S2 pilots which are unmodulated symbols are injected into the carrier on a regular basis in order to help the demodulator lock onto the carrier The pilots are 36 symbols long and are injected every 1440 symbols representing...

Страница 51: ...dth is controlled automatically by the modem The default sweep width used by the modem is 20kHz Other This mode allows the user to set the sweep width in order to compensate for carrier frequency uncertainty introduced in either the ground equipment or in the space segment due to for example frequency conversion errors At very low data rates reducing the sweep width may speed up carrier acquisitio...

Страница 52: ...ed to correct errors remaining from the Viterbi and TCM inner FECs 6 2 1 Edit Tx Rx Advanced Timeslot Screens Timeslot configuration of G 703 and Quad E1 interfaces is described in Chapter 13 6 2 2 Edit Tx Rx Framing Screen Framing is described in Chapter 13 6 2 3 Edit Tx Rx AUPC Screen The Edit Unit AUPC screen is shown in Figure 6 7 Figure 6 7 Edit Tx Rx AUPC Screen Automatic Uplink Power Contro...

Страница 53: ...res a bidirectional ESC channel to be set up Table 6 21 AUPC Mode Typically the local controlling modem is placed in Maintain mode and the remote modem is placed in Monitor mode unless it is also controlling another modem via AUPC in which case it will also be placed in Maintain mode 6 2 3 2 Target Remote Eb No Range 0 1dB to 14 9dB step size 0 1dB Description This is the remote Eb No that AUPC tr...

Страница 54: ...00 series modem Table 6 25 AUPC Method 6 2 3 6 Carrier Loss Action Set to Nominal The AUPC delta power is set to zero causing the carrier to return to its nominal power level Freeze at current value The carrier power is frozen at its current value Set to max The AUPC delta power is set to the maximum power limit as defined by Maximum AUPC power offset Table 6 26 Carrier Loss Action 6 2 3 7 Local D...

Страница 55: ...e AUPC delta power is set to zero causing the carrier to return to its nominal power level Freeze at current value The carrier power is frozen at its current value Set to max The AUPC delta power is set to the maximum power limit as defined by Maximum AUPC power offset Table 6 27 Local Demod Unlocked Action 6 2 4 Edit Tx Rx BUC LNB Screen The Edit Unit BUC LNB screen is shown in Figure 6 8 Figure ...

Страница 56: ...em output from saturating the BUC Table 6 30 BUC Attenuation 6 2 4 4 DC to BUC This is an On Off control used to enable and disable the DC power supply from the modem to the BUC 6 2 4 5 10MHz to BUC This is an On Off control used to enable and disable the 10MHz reference from the modem to the BUC 6 2 4 6 Mute BUC Services in Standby This is an On Off control used to enable and disable the transfer...

Страница 57: ... Range 99 999GHz to 99 999GHz step size 0 0000001GHz Description This is the local oscillator frequency of the LNB Table 6 32 LNB LO Frequency 6 2 4 9 DC to LNB This is an On Off control used to enable and disable the DC power supply from the modem to the LNB 6 2 4 10 10MHz to LNB This is an On Off control used to enable and disable the 10MHz reference from the modem to the LNB 6 2 4 11 Mute LNB S...

Страница 58: ...are a common clock source SAF This allows the entry of Software Activated Feature SAF codes that enable modem feature activation in the field Upgrade This allows the modem software to be upgraded Miscellaneous This allows the date and time to be set on the modem as well as allowing a modem to be reset without having to power it down 6 2 6 Edit Unit M C Screen The Edit Unit M C screen is shown in F...

Страница 59: ...s and Fallback Address The modem supports a RADIUS client that communicates with the server in order to authenticate each user and to provide the authorised level of access administrator or view only This allows users to log in using their personal organization login credentials All login and configuration change activities are recorded in the modem s log giving greater visibility and accountabili...

Страница 60: ...evel attribute or with an Access Level value that is not supported then the modem will default to administrator access being granted The full specification of this attribute of the Access Accept response is as follows a Type one byte value 0x1A indicates a vendor specific attribute b Length one byte value 0x09 indicates the entire vendor specific attribute field is nine bytes in length c Vendor ID...

Страница 61: ...ote modem or other equipment RS485 This sets the serial M C interface to RS485 This allows the modem to be controlled using Paradise Universal Protocol PUP commands as specified in the document Remote M C Specification for Q Series modems If the serial M C interface is internally or externally looped to the modem s ESC interface then the commands can be forwarded to the far end of the link in orde...

Страница 62: ... is set to IP Commands sent to the local modem s IP address are forwarded to the remote modem where the commands are converted to serial M C commands for control of remote equipment See Figure 6 10 for details of the TCPs port usage in relation to these commands Table 6 37 Modem Control Figure 6 10 Serial M C Interface IP ESC Extension Modes ...

Страница 63: ...size 1 Description This is the RS485 address that is assigned to the modem s serial M C interface Table 6 39 Serial M C Interface RS485 Address Range 110 150 300 600 1200 2400 4800 9600 19200 38400 57600 76800 115200 Description This sets the baud rate associated with the modem s serial M C interface Table 6 40 Serial M C Interface Baud Rate 6 2 6 7 Modem Identity The Modem identifier is a user as...

Страница 64: ...e the source IP addresses that read write requests will be accepted from The trap receiver fields are used to define the IP address of a trap server to which trap notifications will be sent when modem alarms arise and when they disappear SNMP can be controlled by the SNMP enable setting SNMP is switched off by default The modem does not need to be configured to tell it which version of SNMP is bei...

Страница 65: ...he satellite from a remote modem and then send this by email from the local modem The modem has a built in SMTP mail client By ticking the required checkboxes the following information can be sent from the modem either on demand or at preset intervals Up to a month s worth of logged Rx Eb No values Up to a month s worth of logged AUPC remote Eb No values Up to a month s worth of logged Rx power le...

Страница 66: ...ddress The following example demonstrates how to graph modem constellation data in a spreadsheet Configure the SMTP mail server and recipient email details Select the Constellation data check box and click the Send email now button Wait for the email to be received at the recipient s account and open it To import the constellation data into a spreadsheet program Microsoft Excel is used in this exa...

Страница 67: ...le Constellation Graph Microsoft Excel 6 2 9 Edit Unit M C HTTPS Screen The Edit Unit M C HTTPS screen is shown in Figure 6 14 Figure 6 14 Edit Unit M C HTTPS Screen Secure HTTPS connections to the modem s web server on port 443 are always enabled However it is possible to disable and re enable standard HTTP requests on port 80 using this screen ...

Страница 68: ...s threshold check is enabled and disabled via the LinkGuard interference over threshold check control The threshold level setting itself is described in Table 6 41 Range 0dB to 9 9dB step size 0 1dB Description Sets a power spectral density threshold used to monitor for any signal under the received carrier If the detected level of interference exceeds the threshold then an Rx traffic warning alar...

Страница 69: ...rrier and remote i e transmitted carrier Eb No values respectively Table 6 43 Local Remote Eb No Alarm Threshold 6 2 10 4 Buffer Slip Alarm Threshold Range 0 hours to 9999 hours step size 1 hour Description Sets the threshold period for consecutive buffer slips above which a deferred alarm is generated A setting of 0 zero disables this alarm Table 6 44 Buffer Slip Alarm Threshold 6 2 10 5 BUC DC C...

Страница 70: ...e is set Range 0 to 500mA step size 1mA Description Sets the trip threshold at which a fault is declared when the current drawn by the Rx LNB is outside the limit Both a minimum and a maximum current threshold can be set These set the current thresholds outside of which an alarm will be generated Table 6 46 LNB DC Current Minimum Maximum 6 2 11 Edit Unit Station Clock Screen The Edit Unit Station ...

Страница 71: ...ock pins on the rear panel Async ESC connector Table 6 47 Station Clock Source When providing an external 10MHz clock to the modem it must meet the following single sideband phase noise measurements at various offset frequencies 10 Hz 125 dBc Hz 100 Hz 145 dBc Hz 1kHz 150 dBc Hz 10 kHz 155 dBc Hz 100 kHz 155 dBc Hz 6 2 11 2 Station Clock Frequency The actual station clock input frequency value mus...

Страница 72: ...hronization to ancilliary equipment beyond the satellite modems 6 2 12 Edit Unit SAF Screen The Edit Unit SAF screen is shown in Figure 6 17 The concept of Software Activated Features SAF is explained in Section 7 4 Figure 6 17 Edit Unit SAF Screen This screen displays The remaining time period before any temporarily enabled SAF features time out The number of unused test shots remaining A test sh...

Страница 73: ...en the file During the upgrade process the modem will drop any service that it is providing Feedback on the progress of the upgrade which typically takes around two minutes is provided on the screen The modem will restart automatically when the upgrade is complete and will resume operation using the same configuration as prior to the upgrade A remote modem can be upgraded over the satellite link b...

Страница 74: ... shown in Figure 6 19 This allows the modem s real time clock to be set The modem incudes a battery and maintains the time even when powered down The modem will display a dialog box to confirm that the date and time have been changed however this will be displayed very briefly and may not be seen in every case Figure 6 19 Edit Unit Miscellaneous Time Screen 6 2 1 Edit Unit Miscellaneous Reset Scre...

Страница 75: ...rrier ID screen is shown in Figure 6 21 This allows a low power spread spectrum signal containing user identification information to be superimposed on the Tx carrier When used with a suitable decoder the information can be used to identify the source of satellite carriers that are interfering with other satellite services Figure 6 21 Edit Unit Carrier ID Screen ...

Страница 76: ...n will be transmitted as part of the Carrier ID signal and will be available for viewing via a suitable Carrier ID decoder 6 2 1 4 Carrier ID This is an Enabled Disabled control that controls the generation of the Carrier ID spread spectrum signal Carrier ID is an optional feature and can be made available on all Q Series modems via a software upgrade The Carrier ID feature is not provided as stan...

Страница 77: ...ynamic routing Dynamic routing populates the routing table based on information forwarded by other routers in the network The modem operates as a two port router in this mode with separate terrestrial and satellite IP addresses Trunking mode Trunking mode implements a Layer 2 bridge in hardware This results in a much higher packet handling capability up to 500 000 packets per second as opposed to ...

Страница 78: ...y is applied to M C subnet IP Traffic address not used IP Traffic port dedicated to satellite traffic only which will be accelerated and bridged over satellite as required Routing Bridged Off This combination of modem settings is illegal M C port will be automatically removed from bridge Routing Bridged On This combination of modem settings is illegal M C port will be automatically removed from br...

Страница 79: ... an On Off control that controls TCP acceleration Packets received by the modem will be either bridged or routed as determined by the IP mode setting When on TCP packets are processed by a Performance Enhancing Proxy PEP that overcomes performance problems associated with using standard TCP over satellite Configuring TCP Acceleration Bridging Mode In order to make it easier to set up TCP accelerat...

Страница 80: ...net 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 When header compression is on Ethernet UDP TCP RTP and IP packet headers are compressed in order to save satellite bandwidth The relative bandwidth saving is greate...

Страница 81: ...m should it have ACM enabled Monitor This switches ACM on in receive only This causes the modem to automatically insert regular Es No information into the return carrier which is used by the distant modem to determine the choice of transmit modcod A secondary function that is switched on is as a test mode that simulates ACM being on but does not actually change modcod Instead it records what modco...

Страница 82: ...between the actual Es No and the Es No required by the dynamically selected modcods Table 6 54 Round trip Satellite Delay 6 2 2 9 M C IP Address Subnet Mask Modem IP Gateway M C IP Address Default 10 0 70 1 Description This sets the IP address for remote control When the M C and traffic Ethernet ports are bridged together then this address is used for both M C purposes and satellite traffic An IP ...

Страница 83: ...ffic Satelite IP Addresses and Subnet Masks Traffic IP address This sets the IP address for the modem s IP Traffic port DHCP is not supported for this address and therefore an address must be manually entered When IPv6 support is selected on the menus then additional address entry options are provided Traffic IP subnet mask This sets the subnet mask for the modem s IP Traffic port Satellite IP add...

Страница 84: ...5 to 7 PXE This selects proprietary Paradise XStream Encapsulation PXE as the protocol for encapsulating IP packets and Ethernet frames for transmission over satellite when using DVB S2 It adds an overhead of around 2 Table 6 57 DVB S2 IP Encapsulation Type 6 2 2 12 Encapsulation PID Range 0 to 8190 step size 1 Description When encapsulating Ethernet frames or IP packets into MPEG2 packets as part...

Страница 85: ...N header The packets must already be tagged at the point of entry to the modem Priority 7 is typically used for network critical traffic such as dynamic routing protocol packets priorities 5 and 6 for video and voice etc The modem uses the priority tag to decide how to process each packet The options are Strict priority queuing packets are queued for transmission based solely on their priority wit...

Страница 86: ...v4 and IPv6 packets in this mode Table 6 60 IPv4 IPv6 Mode 6 2 2 16 M C and IP Traffic Ethernet Speed Duplex Table 6 61 lists the different Ethernet speed and duplex settings for the modem s Ethernet interfaces The M C interface and IP traffic interface can be set independently of each other Changes will be effective immediately but when an auto negotiated mode is selected then any Ethernet connec...

Страница 87: ...l duplex as the only option available 1000M half duplex The modem will auto negotiate the Ethernet speed and duplex settings but as part of the negotiation will advertise 1000Mbps half duplex as the only option available 1000M full duplex The modem will auto negotiate the Ethernet speed and duplex settings but as part of the negotiation will advertise 1000Mbps full duplex as the only option availa...

Страница 88: ...cess of receiving terrestrial IP packets and transmitting them over satellite The buffers influence the quality of service with respect to overall packet delay and whether packets are dropped or buffered during periods of congestion Miscellaneous settings used in specific modes of operation including operation of the 4 port Ethernet switch internal VLAN tagging inside the modem and point to multip...

Страница 89: ...ontrolled by the size of this buffer in conjunction with setting the size of the satellite buffer The buffer should be set large enough to accommodate bursts of packets being received by the modem Setting the buffer larger than necessary could result in large packet delays building up should more packets be sent to the modem than can be transmitted The optimal size for the buffer depends on the li...

Страница 90: ... than can be transmitted The traffic shaper can be used to ensure that the combined output from all classes of traffic does not exceed the available satellite bandwidth even when ACM which dynamically adjusts the data rate is active The optimal size for the buffer depends on the link data rate the packet sizes the number of packets and the specific application some applications being able to toler...

Страница 91: ...odems this enables point to multipoint TCP acceleration All remote modems should be set to this mode and VLAN filtering should also be enabled Hub Bridged TCP acceleration This mode is similar to Hub TCP acceleration but preserves the original Ethernet frames over satellite allowing for example s TCP acceleration of any number of VLANs and acceleration of MPLS streams In this mode for ease of use ...

Страница 92: ...learnt by the hub Tx modem and all traffic destined for a particular remote modem will be tagged at the hub The VLAN tags are removed by the remote modems prior to onward transmission 6 2 3 6 Null Packet Insertion Off When using the ASI or IP terrestrial interfaces with MPEG2 transport stream packets any MPEG2 null packets within the incoming terrestrial data stream will be left untouched and will...

Страница 93: ...g IP address and port number information entered by the user When decapsulating and encapsulating MPEG2 packets the modem needs to know whether the IP packets contain just UDP headers or UDP and RTP headers 6 2 3 9 Destination Address and Destination Port Destination address When using MPEG2 over IP the IP packet wrapper is discarded in order to save satellite bandwidth The user entered destinatio...

Страница 94: ...ace Table 6 68 Stream Tx Rx Terrestrial Interface 6 2 3 12 Stream Tx Rx Identifier Range 0 to 25 step size 1 Description In the context of DVB S2 Variable Coding and Modulation VCM used to support multiple streams the stream identifier corresponds to the DVB S2 Input Stream Identifier ISI used to differentiate each unique stream in order to be able to correlate transmitted and received streams Tab...

Страница 95: ...nto the carrier The pilots are 36 symbols long and are injected every 1440 symbols representing an additional overhead of around 2 4 6 2 3 17 DVB S2 Tx Frame Size Short This represents a frame size of 16 200 bits per frame Normal This represents a frame size of 64 800 bits per frame This is more bandwidth efficient than short frames but has four times the latency As a guideline short frames have a...

Страница 96: ...ic routes to be added Figure 6 24 Edit IP Static Routes Screen Each route consists of a destination IP address subnet mask and a gateway address The Add button must be selected in order to enable each route The Del button is used to delete individual routes The Click to apply routes button must be selected to apply the static routes before navigating away from the web page ...

Страница 97: ...P stack thereby providing confirmation of the active static routes 6 2 6 Edit IP Header Compression Routes Screen The Edit IP Header Compression Routes screen shown in Figure 6 25 allows up to 16 static routes to be added These determine which packets header compression is applied to Compression is both transparent and lossless Figure 6 25 Edit IP Header Compression Routes Screen ...

Страница 98: ...rst time use of Paired Carrier are provided in the information box on the next page When switched on the modem expects the received signal to consist of two overlapped carriers utilizing the same space segment When active a copy of the modem s transmitted signal will be stored in memory and the Paired Carrier signal processing algorithm will attempt to match this with the composite return signal i...

Страница 99: ...sure 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 via the Paired Carrier enable setting on the Edit Paired Carrier menu 2 Before starting it is strongly recommended to prepare for a BER data transparency test using data test sets connect...

Страница 100: ...ED should go green 12 Enable Paired Carrier in the second modem via the Paired Carrier enable setting on the Edit Paired Carrier menu Its demodulator should also lock Rx traffic LED should go green 13 Enable the BER test and check for data transparency in both directions Inject errors via the BER testers in both directions and ensure they are received correctly 14 If the modems do not lock or are ...

Страница 101: ...plication note AN_027A 1 1 quick start guide for further details 17 When using Paired Carrier with IP as the terrestrial interface type Paradise recommends setting the master hub transmit timing to Internal the hub and remote receive clocking to Satellite and the remote transmit clocking to Rx reference This ensures only one master clock is providing timing for both modems and can prevent data pat...

Страница 102: ...e Longitude Range 180 Degrees to 180 Degrees step size 0 01 Degrees Description The longitudinal position of the satellite If using the modem front panel then the Up and Down arrow keys are used for setting and respectively Table 6 75 Satellite Longitude 6 2 7 4 Earth Station Longitude Range 180 Degrees to 180 Degrees step size 0 01 Degrees Description The longitudinal position corresponding to th...

Страница 103: ...lay 6 2 7 8 Maximum Round trip Delay Range 0 01ms to 400ms step size 0 01ms Description The maximum satellite round trip delay To minimize the Paired Carrier acquisition time set this to the actual measured satellite delay value shown on the Status PCMA screen plus 0 5ms Table 6 79 Maximum Round trip Delay 6 2 8 Edit Memories Screen The Edit Memories screens shown in this section allow the user to...

Страница 104: ...web user interface then the modem s current M C IP address netmask gateway takeaway control Modem ID and passwords are all retained whereas when selected from the front panel these go back to their factory defaults This is done in order not to lose remote control of the modem from the web user interface when using it LOAD_DEFAULTS cannot be erased or overwritten Configuration memory names are rest...

Страница 105: ... the Cisco Reload command where a known trusted configuration is loaded after a defined timeout period in the event that the reload operation is not cancelled by the operator in a timely manner after completing the necessary configuration changes Figure 6 29 Edit Memories Advanced Reversionary Control Screen The procedure for protecting and recovering a remote modem from failure during a configura...

Страница 106: ...the timeout 4 Click on the Reload button to start the timeout period at which point the screen will change to that shown in Figure 6 30 which shows the remaining timeout period along with the name of the configuration memory that will be reloaded In addition the Reload button changes to a Cancel button 5 Make any necessary changes to the remote modem s configuration 6 After completing the configur...

Страница 107: ...oad one or all of the configurations from the modem to the user s browser device such as a PC Figure 6 32 Edit Memories Download Screen 6 2 8 5 Edit Memories Upload Screen The Edit Memories Upload screen shown in Figure 6 33 allows the user to browse to a location on their browser device where they have a configuration memory that they want to upload to the modem After selecting the file selecting...

Страница 108: ...le for download from http www paradisedata com Figure 6 34 Edit Redundancy 1 for 1 Screen The Current status shows the 1 1 status of the modem This will be shown as Main when the modem is online Maintenance when the modem has been taken out of service and Standby when the modem is offline ready to switch over on a fault occurring on the online modem Transmit fail switchover controls whether a swit...

Страница 109: ...paired Once the modem is in Maintenance mode the Switch to maintenance button is replaced with a Switch to service button which can be used to reverse the process by making the modem available to come online 6 2 10 View Screen The View screen shown in Figure 6 35 allows the following to be viewed Graphs These include spectrum constellation throughput and time based performance graphs None of these...

Страница 110: ...of Java applets used for graphing purposes This is done be installing a security certificate from the modem onto the browser device The procedure is as follows The Edit IP Advanced screen contains an option at the bottom of the screen labeled Download root authority security certificate Selecting this option will download a zip file to the web browser device On opening the zip file a file named pa...

Страница 111: ...rning Screen 6 2 10 1 Rx Spectrum Monitor The Rx Spectrum Monitor shown in Figure 6 37 is a powerful real time spectrum analyser within the modem that is used to view the received signal spectrum Figure 6 37 Rx Spectrum Monitor The Rx Spectrum Monitor can be used to check for correct modem operation ...

Страница 112: ...ears at the top of the graph can be adjusted as can the amplitude resolution Persistence leaves the spectrum to build up over time and is useful for identifying transient signals such as intermittent interference LinkGuard is patented technology that monitors underneath the received carrier for any interference while on traffic It is viewed using the same Rx Spectrum Monitor screen as shown in Fig...

Страница 113: ...se can cause cycle skips seen as unwanted rotations within the constellation 6 2 10 3 IP Graphs Figure 6 38 shows an example of an IP throughput graph IP graphs support the display of throughput including errored and dropped packets for transmit and receive in bits per second and packets per second for the terrestrial and satellite ports The throughput can be viewed in real time and over one day a...

Страница 114: ... particularly when viewed over longer time periods where the effects of short term fluctuations are removed By viewing the ACM graph over a long time period such as a month an average available bandwidth figure is produced that can be factored into new or revised service level agreements that incorporate the benefits of ACM when compared to the nominal data rate of the link without ACM An example ...

Страница 115: ... Graph Short time period 6 2 10 4 Other Time based Graphs A number of time based graphs can be displayed Graphical values are stored for 31 calendar days or until the modem is powered down The recording of all values occurs automatically at all times once the modem is powered on and is not dependent on whether the graphs are being viewed or not ...

Страница 116: ... of the distant modem being controlled via AUPC The transmit power level while under AUPC control CPU usage ACM data rate An example graph is shown in Figure 6 43 Figure 6 43 Eb No Graph 6 2 10 5 Alarms System alarms can be viewed using the View Alarms screen shown in Figure 6 44 Alarms are latched and their status will be shown as Off if they are no longer active The Accept button can be used to ...

Страница 117: ...n shown in Figure 6 45 The Clearc button can be used to delete all of the entries in the log The Download Log file button can be used to download a text file of the log contents to the browser device Figure 6 45 System Log Screen 6 2 10 7 View Setup Screen The View Setup screen shown in Figure 6 46 displays the current values of the most important configuration settings ...

Страница 118: ...8 View Unit Screen The View Unit screen shown in Figure 6 47 displays manufacturing information including the software version number and the hardware fitted power supply voltage levels modem temperature indication loopback status and the IP address of the M C port for when this has been set using DHCP ...

Страница 119: ...hown in Figure 6 48 displays the status of each modem Software Activated Feature SAF indicating whether they are on off or temporarily enabled It also shows how many test shots remain along with the remaining test time Information on temporary SAF such as any temporary licenses is also available The SAF concept is explained in Section 7 4 ...

Страница 120: ...trial interface back towards the satellite interface RF Test Modes 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 IP Packet Satellite Delay This 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 delay It applies to IP traffic ...

Страница 121: ...s With respect to the RF Test Modes selecting Tx CW causes a pure carrier to be transmitted rather than the normal modulated carrier This is useful for evaluating phase noise and spurious but should not be used over a live satellite link without the operator s permission Selecting Modulator alternate 1 0 causes an alternating 1 0 1 0 pattern to be fed to the modulator at the symbol rate This cause...

Страница 122: ...ge 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 latency is only valid when the Tx signal of the modem is fed back to the Rx input A long test pattern must be selected in order to make sure that the pattern is unique for longer than the actual latency period otherwise the latency will be under reported Th...

Страница 123: ...pt when entering a numeric value when it decrements the digit highlighted by the cursor The Down arrow key is also used to enter a comma when entering a number of values together such as when entering a list of timeslots The Left arrow key moves the cursor to the left both on menus and when entering alphanumeric values The Left arrow key has a special function when viewing the system log where it ...

Страница 124: ... then upper case alphabetic characters 6 3 1 4 Special Function Keys Help Help information can be displayed for any M C control by holding down the 0 key and pressing the Left arrow key together while the screen containing the M C control is displayed This brings up scrollable text that explains the M C control s function Pressing the 0 key and Left arrow key together for a second time removes the...

Страница 125: ...f a value from a list of options or require the setting of a new value Examples of these types of screen are shown below Screen Type 1 Menu Selection from Pre defined List Screen Type 2 Entry of New Value Features that are not available appear on the display are preceded by a There are several reasons why a feature may not be available The feature is a Software Activated Feature SAF and the approp...

Страница 126: ...owing sub menus Status Displays modem operational status summary information Edit Allows modification of all modem configurable properties View Displays detailed operational status and read only configurable property values Test Controls the selection of test modes A user set Modem Identifier is shown on the top line of the screen and is typically used to specify the physical location of the modem...

Страница 127: ...Q Flex Satellite Modem Installation and Operating Handbook 6 97 6 4 2 Status Menu Figure 6 51 Front panel Status Menus ...

Страница 128: ...Q Flex Satellite Modem Installation and Operating Handbook 6 98 6 4 3 Edit Menu Figure 6 52 Front panel Edit Menus ...

Страница 129: ...Q Flex Satellite Modem Installation and Operating Handbook 6 99 6 4 3 1 Edit Tx Menu Figure 6 53 Front panel Edit Tx Menus ...

Страница 130: ...Q Flex Satellite Modem Installation and Operating Handbook 6 100 6 4 3 2 Edit Rx Menu Figure 6 54 Front panel Edit Rx Menus ...

Страница 131: ...Q Flex Satellite Modem Installation and Operating Handbook 6 101 6 4 3 3 Edit Unit Menu Figure 6 55 Front panel Edit Unit Menus ...

Страница 132: ...Q Flex Satellite Modem Installation and Operating Handbook 6 102 6 4 4 View Menu Figure 6 56 Front panel View Menus 6 4 5 Test Menu Figure 6 57 Front panel Test Menus ...

Страница 133: ...tying and filling to absorb differences over the 24 hour period A design aim should be to have all clock signals within the system originating from one master source in order to ensure that the buffer does not underflow or overflow during the 24 hour cycle Plesiochronous This is where there is more than one clock in the system and a buffer is required to absorb the difference between the clocks Da...

Страница 134: ...ck through the DTE equipment ModemTx Data Interface FIFO DDS PLL VCXO TCXO TxData TxClock TT Internal TxClock ST Figure 7 1 Internal Tx Clock Mode 7 1 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 Send Timing ST in this mode and requires a clock signal to be provided on Terminal Timing TT The ST signal is provid...

Страница 135: ... 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 ModemTx Data Interface FIFO DDS PLL VCXO VC...

Страница 136: ...e signal will be subject to Doppler plesiochronous offsets ModemRx Data Interface RxBuffer DDS VCXO RxData RxClock RT PLL RxClk Data from decoder deframer Figure 7 4 Satellite Rx Clock Mode 7 1 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 Receive Timing RT and Receive Data RD r...

Страница 137: ...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 just R...

Страница 138: ...ed by the remote end Outgoing Tx carrier o Is the incoming Rx clock being looped Tx clock Rx or clock looped by the equipment or via cables o If not what is the accuracy of the Tx clock The various Tx and Rx clocking modes of the modem are described in the following sections 7 1 3 1 Clock Loop at One End The end with the clock loop requires the buffer to be disabled i e the Rx clock to be set to S...

Страница 139: ...oop at the remotet end the Rx satellite clock is a copy of the Tx clock and cannot be looped again 7 1 3 2 No Clock Loop If there is no clock loop then both ends need the buffer to be enabled in order to cope with Doppler and the plesiochronous effect i e the difference between the clocks at each end Apply the following rule to both ends If a clock is being provided via the terrestrial interface a...

Страница 140: ...he hub to the remote It requires a high stability E1 T1 reference signal ideally from a GPS receiver to be fed to the hub modem via the G 703 balanced or unbalanced connectors The remote modem will then generate a T1 E1 output signal synchronized to the local modem s GPS signal This signal can then be used for synchronizing the remote site equipment To set the G 703 clock extension in Tx set the T...

Страница 141: ...s below a user set threshold A target Eb No level has to be set along with a maximum transmit power level for the local end The transmit power is adjusted to keep the remote Eb No at the target value If the satellite link is lost then the transmit power can be frozen at its current level until the link is restored or it can be returned to its nominal value 7 2 2 Configuring AUPC To use the AUPC fu...

Страница 142: ...o replace the offline modem in a 1 1 pair without interrupting traffic 7 3 2 Switching Operation If a particular modem is required to be the online modem then this should be powered up first Alternatively a manual switchover should be invoked once the modems have powered up This is achieved by selecting the Switch to standby control on the Edit Redundancy 1 1 menu which momentarily simulates a fai...

Страница 143: ...uipment Note that only one output is active at a time Because of the signal loss associated with splitters combiners the power level at the output of each modem needs to be increased by approximately 3 5dB 7 Connect the two receive IF ports to the two output ports of a suitable powersplitter combiner of the correct impedance 50Ω or 75Ω and the appropriate frequency range Both demodulators will rec...

Страница 144: ...matic when it detects the path through the primary modem is no longer available 7 3 4 2 1 N IP Operation The following rules should be observed when using 1 N redundancy for IP 5 In 1 N mode the M C IP addresses need to be different for each modem 6 In 1 N mode the IP traffic addresses should be set to be the same in both modems The IP traffic port on the Standby modem is physically isolated from ...

Страница 145: ...stration Mode can be used to test compatibility with other equipment and allows rapid substitution of equipment in a crisis To enable one or more features permanently referred to as Permanent Mode a modem specific feature code needs to be obtained from Teledyne Paradise Datacom The code is tied to the modem serial number available via the user interfaces and on the back panel The features that hav...

Страница 146: ...equency when significant levels of interference are experienced The user can set an interference threshold and an associated time period When interference is experienced above the threshold for the defined time period then the carrier frequency will be changed at both ends of the link using Paradise s Reversionary Control feature which allows the distant modem s configuration to be changed automat...

Страница 147: ...ce along with the wanted signal although it will not be able to differentiate between them at this point and will show a single composite spectrum LinkGuard does not necessarily replace other interference detection equipment but it does provide a useful new first line of defense It works with all carriers including DVB S2 S2X 7 7 FastLink Low latency LDPC FEC design is a trade off between good BER...

Страница 148: ...s then Paradise believes you should choose one with flexible configuration as opposed to a fixed set of modulation and code rates that are inevitably a compromise FastLink is available on all Paradise SCPC modems at all data rates up to 100Mbps FastLink LDPC is compatible with Paired Carrier FastLink does not interoperate with any other LDPC FastLink performance a full set of BER graphs and latenc...

Страница 149: ...0 Note 2 5 5 5 9 133 69 8PSK 0 778 5 7 6 1 6 6 133 69 8QAM 0 639 4 5 4 8 5 1 133 70 8QAM 0 710 5 5 4 5 7 133 70 8QAM 0 778 5 6 5 9 6 3 133 70 16APSK 0 726 See Note 3 134 73 16APSK 0 778 See Note 3 134 73 16APSK 0 828 7 7 8 2 8 5 134 73 16APSK 0 851 8 8 5 8 9 134 73 16QAM 0 726 Note 4 7 5 7 7 136 70 16QAM 0 778 7 7 6 7 9 136 70 16QAM 0 828 7 5 8 0 8 2 137 71 16QAM 0 851 7 8 8 2 8 6 137 72 32APSK 0 ...

Страница 150: ...ows Low BER mode 5 9dB Balanced mode 6 2dB Low Latency mode 6 7dB Note 2 8PSK rate 0 710 can be used in a Low BER mode at a BER QEF point of 1e 12 only with Eb No of 5 9dB guaranteed Note 3 BER performance for this FEC rate is to be announced Note 4 16QAM rate 0 726 can be used in a Low BER mode at a BER QEF point of 1e 12 only with Eb No of 7 6dB guaranteed ...

Страница 151: ... configured to be outside the bridge then one Ethernet port is dedicated to IP traffic and the other to M C control as labeled on the connectors To communicate with the modem itself for M C purposes an IP address and subnet mask must be set Note that setting an IP address to 0 0 0 0 causes the modem to request an IP address from a Dynamic Host Control Porotocol DHCP server on the network Static ro...

Страница 152: ...rmance depends on a number of factors including one way two way traffic packet size data rates and the mixture of IP features switched on There are endless combinations and therefore it is strongly recommended that empirical testing is undertaken prior to deployment to ensure that the required level of service can be provided The modem can process up to 150 000 packets per second In Trunking mode ...

Страница 153: ...ontrolled by the Remote M C interface setting Setting this to IP Forward to remote causes the modem to process TCP packets sent to ports 6703 and 6704 in a special way o Packets sent to port 6703 are forwarded over the ESC to port 6703 on the remote modem At the remote modem with the remote M C interface mode set to IP Remote Rem M C the payloads of packets received over the ESC on port 6703 are f...

Страница 154: ...lows 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 as in routing mode When acceleration is used in bridging mode all UDP packets are bridged VPN packets although they use TCP cannot be accelerated because acceleration relies on making changes to the addresses in the origi...

Страница 155: ...eams are sent i e the relative priority levels of packets from different streams and the effect this has on packet jitter Traffic shaping essentially controls these two key aspects of traffic management namely access to satellite bandwidth and the level of delay and jitter that is experienced The Paradise traffic shaping feature is controlled via the modem web user interface under Edit Unit Advanc...

Страница 156: ...on to IEEE 802 1p priority tagging A default data stream exists for any packets not explicitly part of a defined data stream These get assigned the lowest available priority namely seven 7 8 9 4 Stream Classification How does the modem know which packets belong to which streams Streams can be classified using one of the following methods The source and or the destination address in the IP packet a...

Страница 157: ... selected then the packet will only 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 example in Figure 7 11 shows a traffic shaping scheme based on matching on source address and source port number Note the Enable shaping checkbox which controls whether...

Страница 158: ...e 350 000bps is less than the CIR of Class 1 then it will get all the bandwidth it needs Class 0 will get its guaranteed 500 000 bps but will be allocated only an additional 150 000bps bringing its total to 650 000bps because this is all of the spare bandwidth and is less than the Class 0 BIR value In another example assume Class 2 is being received at 400 000bps and Class 1 at 950 000bps In this ...

Страница 159: ...ss 7 has the highest priority An example traffic shaping scheme based on DSCP classification is shown in Figure 7 12 Figure 7 12 Traffic Shaping Configuration Screen using DSCP 7 8 9 4 3 IEEE 802 1p Priority Tag Classification may be done on the 3 bit Priority Code Point field of an IEEE 802 1q VLAN tag also referred to as an IEEE 802 1p Priority Tag This is part of a 32 bit field inserted into an...

Страница 160: ... the bandwidth to stop total starvation The 8 QoS priority levels are mapped to three TCP IP queues Packets with highest QoS priority level 7 are sent to high priority TCP IP queue Delay sensitive packets QoS levels 6 and 5 are sent to the medium priority queue The remainder QoS levels 4 to 0 are sent to the low priority TCP IP queue For Strict priority queuing all packets in high priority queue a...

Страница 161: ...t have this field set to the appropriate value in order for the modem to recognize the different data streams 7 8 9 5 Traffic Shaping Graphs A web graphing facility exists that shows a line graph of throughput in terms of bps over time for each QoS class The data for each class is not superimposed instead it is necessary to select the particular class to be monitored graphically from a dropdown bo...

Страница 162: ...ically 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 supported via the Quagga software package Itan ...

Страница 163: ... bytes payload 5 bytes HDLC 79 bytes Following compression 1 byte header IP UDP RTP 1 byte Ethernet 20 bytes payload 5 bytes HDLC 27 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 Head...

Страница 164: ...pecial set up is required the modem will automatically ensure Es No information is returned to the transmitting modem with no material impact on bandwidth In terms of configuration the link is set up as normal using a nominal data rate modulation and FEC rate that gives the required symbol rate The only other step is switching ACM on The modcod selected by the user on the forward path represents t...

Страница 165: ...hieved by sending Ethernet Pause frames that define a period of time for which transmission should be suspended In principle Pause frames are supported only for full duplex links and support for them in vendor equipment is optional therefore the modem auto negotiates this capability with the attached equipment Paradise ACM is intrinsically tied to an IP traffic shaper and TCP accelerator allowing ...

Страница 166: ...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 167: ...twork 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 SCP...

Страница 168: ...ing 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 sign...

Страница 169: ...just the desired signal This is depicted in Figure 7 15 Figure 7 15 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 un...

Страница 170: ...cally have 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 reduce...

Страница 171: ...radise PCMA 70 Satellite Bandwidth Extender should be used 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 Q My transmit and receive carrier levels off satellit...

Страница 172: ...ponders The transponder must do no more than filter frequency convert and amplify the signal Q Is it difficult and time consuming to install and set up Paired Carrier A No The operator sets the satellite delay or alternatively the modem and satellite positions to allow the satellite signal to be acquired A few other parameters specific to Paired Carrier need to be set up Set up takes less than fiv...

Страница 173: ...twork Management 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 Q Flex Satellite Modem These must be sent to a spe...

Страница 174: ... 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 2A...

Страница 175: ...interface needs to be specifically configured for 1 1 operation The 1 1 G 703 mode controls what happens when power is removed If the power is lost in Normal mode then the G 703 input and output are joined in order to ensure that if the G 703 signal is looped through multiple equipment then the other traffic is not affected by a break in the G 703 line If the power is lost in 1 1 mode then the G 7...

Страница 176: ...e data rate is limited by connecting cable length The maximum data rate is 10Mbps over a 10m cable 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 halves as the distance doubles e 5Mbps to 20m 2 5Mbps to 40m etc Similarly the maximum data rate increases as the connecting cable length is reduced...

Страница 177: ... Tx Clock Out ST 6 31 ECL DATA CIRCUIT FROM MODEM RX Clock Out RT 2 27 ECL Data Out RD 4 29 ECL Signal Ground SG 1 26 Ground DCE Available CA 3 28 ECL COMMON LINES Signal Ground SG 13 38 Ground Signal Ground SG 19 44 Ground Loopback Circuit A LA 10 35 ECL Loopback Circuit B LB 12 37 ECL Loopback Circuit C LC 5 30 ECL The modem can operate at high data rates using the HSSI interface but the maximum...

Страница 178: ... of the EIA signals LL Local Loopback and RL Remote Loopback Loopback LC is an optional request signal from DCE to DTE to request that the DTE provides a loopback path to the DCE By selecting Advanced it is possible to configure the modem to raise an alarm if either the Sig Valid In line RS or Device DTE Ready In line TR switch to the inactive state It is also possible to configure the Tx carrier ...

Страница 179: ...nd 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 fault but an indication that you have a clocking problem external to the modem i e changing clock ...

Страница 180: ...e 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 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 ...

Страница 181: ...ARDS MODEM TX Clock In DA 113 24 RS232 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 Clock Out DD 115 17 RS232 Data Out BB 104 3 RS232 Sig Valid Out CF 109 8 RS232 COMMON LINES Signal Ground AB 102 7 Ground Shield Protective ground SHIELD 101 1 Screen Device DTE Ready In CD 108 20 RS232 Device DCE Ready...

Страница 182: ...Ready In line CD switch to the inactive state It is also possible to configure the Tx 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 automaticall...

Страница 183: ...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 maximum rate halv...

Страница 184: ...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 maximum rate halves as the distance doubles ie 5Mbps...

Страница 185: ...play a Data Marginal warning whenever a line code violation is detected For T1 operation a choice of line lengths is available that cause the modem to compensate the T1 signal for any line loss associated with the cable IP Interface The IP is a standard interface supplied with the modem The modem supports two RJ45 Ethernet port for IP traffic and remote control respectively The Ethernet supports 1...

Страница 186: ...s configured and connected For example if port one is being used then this provides the clock source for all other ports which are slaved to this clock The slaved ports require a bearer to be generated from the modem Alternatively timing may be distributed to the terrestrial equipment modem from a single master clock source Example RJ45 connectors are shown in the following figure ...

Страница 187: ... C Specification for Q Flex Satellite Modem 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 interc...

Страница 188: ...il In Out The 1 1 redundancy cable is wired as follows Modem 1 Modem 2 Signal Name Pin 1 Pin 1 Circuit ground screen 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 The cable must be of the shielded variety and should be kept as short as practical A standard 1 1 lead part number P1391 is available from Teledyne Paradise Datacom ...

Страница 189: ...currently used 7 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 a...

Страница 190: ...ential 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 only ...

Страница 191: ...rate 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 pages ...

Страница 192: ...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 193: ...x 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 limi...

Страница 194: ... 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 da...

Страница 195: ...backward alarm and activates when 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 Op...

Страница 196: ... used for the four standard IDR backward alarms In IBS modes BA 1 indicates 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 four separate backward alarms as per IDR ...

Страница 197: ...ctions 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 G 7...

Страница 198: ...tion 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 to...

Страница 199: ...ified 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 FastLink...

Страница 200: ...UC This can be caused by too much attenuation in the cross site cabling or inability to control the attenuator in the BUC such as use of a non Paradise BUC with no input 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 wa...

Страница 201: ...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 CA...

Страница 202: ... and out of lock Rx fault Baseband 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 transport traffic This is a DVB S2 alarm indicating that no valid MPEG2 transport stream packets were detected within the received DVB S2 satellite frame Rx fault Baseban...

Страница 203: ...eme exceeded Rx warning Rx data rate outside interface range Configuration error data rate for terrestrial interface exceeded Rx warning The remote 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 check th...

Страница 204: ...rom 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 PCM b...

Страница 205: ...en 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 BUC i...

Страница 206: ...eatures 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 11 7 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 te...

Страница 207: ...ype connector Quad E1 four balanced G 703 on RJ45 connectors User Traffic Data Rate 4 8kbps to 2Mbps Extends base operation to 5Mbps Extends 5Mbps to 10Mbps Extends 10Mbps to 25Mbps Extends 25Mbps to 60Mbps Extends 60Mbps to 100Mbps Extends 100Mbps to 160Mbps Extensions are cumulative User Traffic Data Rate Resolution 1bps Note The combination of FEC rate modulation scheme and satellite overhead l...

Страница 208: ... facto 7 8 de facto 0 93 Paradise Viterbi BPSK O QPSK 1 2 3 4 7 8 TCM 8PSK 2 3 Sequential BPSK O QPSK 1 2 3 4 7 8 Outer Forward Error Correction Concatenated Intelsat Reed Solomon outer codec to IESS308 310 to 10 Mbps available with Viterbi TCM and Sequential For DVB S Reed Solomon outer codec 204 188 T 8 with interleaver depth of 12 Scrambling IBS Synchronised to framing per IESS 309 up to 10 Mbp...

Страница 209: ...occupied bandwith calculations Occupied Bandwidth See referenced document AN_035 above Recommended Channel Spacing See referenced document AN_035 above Phase Accuracy 2º maximum Amplitude Accuracy 0 2dB maximum Carrier Suppression 30dBc minimum Output Phase Noise As IESS 308 nominally 3dB better Also complies with IESS 316 IF Output Frequency Stability 0 05 ppm per year L band Output Frequency Sta...

Страница 210: ... http www paradisedata com for more details including occupied bandwith calculations Performance Monitoring 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 12 4 Clocking and Buffering Specifications Parameter Modem Clock Inte...

Страница 211: ...Automatically adjusted to slip an integer number of terrestrial multi frame lengths for framed rates Buffer storage Maximum buffer size 256kbytes 12 5 Framing 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...

Страница 212: ...meter 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 Mux The bearer generated within the Insert Mux provides full multiframe and CRC support ...

Страница 213: ...nance 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 re inserting into the distant ...

Страница 214: ...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 ove...

Страница 215: ...ata 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 sat...

Страница 216: ...r of remote Eb No and BER only full remote Eb No maintenance Unidirectional or Bi directional operation Communication Link Utilises asynchronous ESC channel on IBS SMS IDR and 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 ...

Страница 217: ...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 DVB S2 8PSK 3 5 178 5...

Страница 218: ...ntification 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 For multi drop applications RS485 interface For direct to PC applications RS232 interface front panel selectable M C port may be directly internally linked to ESC port for...

Страница 219: ...ich requires acknowledgements will typically run at up to 128kbps per connection 80 Connections Sec 12 16 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 output 200W to BUC via Tx IFL Mains input 24V DC 6A output 200W to BUC viaTx IFL 48V DC input 48V DC 3 5A ...

Страница 220: ...e Modem Installation and Operating Handbook 12 14 12 17 Performance Graphs For FastLink low latency LDPC BER curves please see separate datasheet on the Teledyne Paradise Datacom web site at http www paradisedata com ...

Страница 221: ...Q Flex Satellite Modem Installation and Operating Handbook 12 15 Figure 13 1 Modem Error Probability versus Eb No for 8PSK TCM ...

Страница 222: ...Q Flex Satellite Modem Installation and Operating Handbook 12 16 Figure 13 2 Modem Error Probability versus Eb No for TPC QPSK ...

Страница 223: ...robability versus Eb No for TPC 8PSK 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 224: ...Q Flex Satellite Modem Installation and Operating Handbook 12 18 Figure 13 4 Modem Error Probability versus Eb No FOR TPC 16QAM ...

Страница 225: ... 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 Figure 13 5 Modem Error Probability versus Eb No For TPC Rate 0 93 versus Comtech TPC Rate 0 95 ...

Страница 226: ... audio channels or a 128kbps carrier can be generated comprising 64kbps data from the modem main data interface plus two 32kbps ADPCM audio channels These modes emulate the popular P1348 P1448 voice data MUX card 2048k mode This option is used to indicate whether a continuous 2048kbps traffic stream is formatted as G 732 or not G 732 CAS signalling This specifies whether Channel Associated Signall...

Страница 227: ...itted then the rear panel shared Async ESC port is disabled and the IDR card provides separate ESC and Aux ports In the case of RS232 RS422 and RS485 the relevant physical interface on the Async ESC port is directly connected through to the ESC channel and the data is therefore passed transparently i e whatever is passed through is what comes out on the equivalent interface on the remote modem wit...

Страница 228: ... order to facilitate passing M C messages over satellite to control a remote modem without the need for external loopback cables between the Async ESC and Remote M C ports Both point to point and point to multipoint RS485 over the ESC channel are supported The following drawing shows the internal connections that are made ESC Tx ESC Rx M CRx M CTx Link Local ESC Tx ESC Rx M CRx M CTx Link Remote W...

Страница 229: ... messages on the remote RS485 bus 13 3 Edit Tx Rx Framing Overhead IBS Screen The Edit Tx Rx Framing Overhead IBS screen shown in Figure 13 3 controls the overhead in IBS mode allowing both the low and high rate ESC channels to be set up Figure 13 3 Edit Tx Rx Framing Overhead IBS Screen This contains the following options High rate ESC data mode Controls whether the IBS high rate asynchronous ESC...

Страница 230: ...connected through to the ESC channel This interface on the modem provides the IBS low rate Intelsat oversampled ESC facility The ESC and Aux functions are mutually exclusive unless an IDR card is fitted If an IDR card is fitted then the Aux port can provide 32kbps or 64kbps access to the IDR overhead in place of one or both of the IDR 32kbps ADPCM audio ESC channels or it can provide either the IB...

Страница 231: ...se are not used or can be used to reduce the 96kbps overhead to 64kbps or 32kbps When set to Off no Aux data is placed in the overhead When set to 32K 32kbps of Aux data replaces the data in IDR audio ESC channel V2 this requires the IDR audio mode setting to be 2x16k in V1 or 1x32k in V1 When set to 64K 64kbps of Aux data replaces the data in IDR audio ESC channels V1 and V2 this requires the IDR...

Страница 232: ... options as displayed in Figure 13 5 and Figure 13 6 when G 703 or Quad E1 is selected as the terrestrial interface type These allow the selection of timeslots for transmission and reception They allow the association of specific terrestrial timeslots with satellite timeslots Figure 13 5 Tx Dropped Timeslot Screen Figure 13 6 Rx Inserted Timeslot Screen ...

Страница 233: ...vices Channel FEC Forward Error Correction LCD Liquid Crystal Display LDPC Low Density Parity Code Check LVDS Low Voltage Differential Signal IBS Intelsat Business Service IESS Intelsat Earth Station Standard IDR Intermediate Data Rate M C Monitor and Control MIB SNMP Management Information Base Mux Multiplexer PUP Paradise Universal Protocol PLL Phase Locked Loop PPP Point to Point Protocol PRBS ...

Страница 234: ...ease 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 cost of any repairs or sign disclaime...

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