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Q-Lite Satellite Modem Installation and Operating Handbook 

 

 7-11 

faults that are external to the equipment that affect both units simultaneously do not result 
in  any  switchover.  L-band  services  can  be  configured  to  switch  with  the  modem  or  to 
remain with the online modem after it has failed. 
 
In  order  to  minimize  unnecessary  switchovers,  a  modem  that  experiences  a  failure  will 
remain  offline  even  if  it  returns  to  its  normal  working  state. If  it  does  return  to  a  normal 
state then it will act as the Standby unit. 
 
 

7.3.3  Setup Procedure 

A 1:1 redundant modem pair is set up as follows: 
 

1.  Ensure  that  both  modems  are  running  the  same  software  version  and  are 

configured  identically.  See 

Section  7.3.4

  for  details  of  how  to  configure  IP 

addresses in modem redundancy configurations. 

2.  Connect a suitable cable between the 9-way 1:1 connectors on the two modems. 
3.  Connect the terrestrial data interfaces for the two modems in parallel. 
4.  nd  configure  the  two  units  alike.  Suitable  adapter  cables  are  available  from 

Teledyne Paradise Datacom. 

5.  If the Ethernet traffic port is used on the modem, then the two traffic ports may be 

connected to a hub or other multi-port LAN device using RJ45 crossover cables. 

6.  Connect the two transmit IF ports to the input ports of a suitable splitter/combiner 

of  the  correct  impedance  (50  Ohm  or  75  Ohm)  and  the  appropriate  frequency 
range. The combined output is fed to the up-conversion equipment. 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  (50Ohm  or  75Ohm)  and  the 
appropriate  frequency  range.  Both  demodulators  will  receive  an  identical  signal 
from  the  down-conversion  equipment  via  the  splitter/combiner.  Because  of  the 
wide  dynamic  range  of  the  modem  AGC  circuitry  there  should  be  no  need  to 
modify signal levels. 

8.  Check correct operation by performing a manual switch between the units (via the 

Unit-Advanced-Operation 

menu). The pair will not switch over unless the Standby 

unit is fully operational. (Note that the pair can be tested in loopback mode but this 
requires the IF signals to be split and combined and looped back to the other unit. 
Looping the output of one unit back to its self will not work, since the Standby unit 
output is muted and it will therefore not detect any carrier.) 

 
 

7.3.4  IP Addressing and Operation in Redundancy Configurations 

 

7.3.4.1  1:1 IP Operation 

The following rules should be observed when using 1:1 redundancy for IP. 
 

1.  In 1:1 mode, the M&C IP addresses need to be different for each modem. 
2.  In 1:1 mode, the IP traffic addresses also need to be different for each modem. In 

bridging modes the IP traffic address is not used but it is required for routing mode.  

3.  The M&C Ethernet port must not be bridged to the IP traffic port (this is controlled 

via the 

Bridge M&C

 control on the 

Edit->IP

 screen). 

Содержание Q-Lite

Страница 1: ... Datacom LLC 2 3 The 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 http www paradisedata com Copyright 2013 2017 Teledyne Paradise Datacom Ltd All rights reserved Q Lite Satellite Modem Installation and Operating Handbook ...

Страница 2: ...rature Warnings and Alarms 4 3 Chapter 5 Introduction 5 1 5 1 Overview 5 1 5 2 Standard Fit Hardware 5 2 5 2 1 L band Operation 5 2 5 2 2 Ethernet Operation 5 2 5 3 Hardware Options 5 2 5 3 1 Terrestrial Interface Option Cards 5 2 5 3 1 1 G 703 Option Card 5 2 5 3 1 2 EIA 530 Option Card 5 3 5 3 1 3 IDR Option Card 5 3 5 3 1 4 LVDS Option Card 5 3 5 3 1 5 HSSI Option Card 5 3 5 3 1 6 Quad E1 Optio...

Страница 3: ...equency Band 6 17 6 2 4 13 Tx Rx Carrier Frequency 6 17 6 2 4 14 Tx Rx Spectral Roll off 6 17 6 2 4 15 Tx Rx Spectral Inversion 6 18 6 2 4 16 L band Output Power 6 18 6 2 4 17 Modem BUC Carrier 6 18 6 2 5 Edit Tx Rx Service Advanced Screen 6 18 6 2 5 1 FastLink Optimisation Mode 6 19 6 2 5 2 DVB S2 Tx Rx Pilot Tones 6 19 6 2 5 3 DVB S2 S2X Tx Rx Frame Size 6 20 6 2 5 4 Sweep Mode 6 20 6 2 5 5 Swee...

Страница 4: ... 10 4 Buffer Slip Alarm Threshold 6 40 6 2 10 5 BUC DC Current Alarm 6 40 6 2 10 6 Ethernet Port Down Alarms 6 41 6 2 11 Edit Unit Station Clock Screen 6 41 6 2 11 1 Station Clock Source 6 41 6 2 11 2 Station Clock Frequency 6 42 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 Miscellane...

Страница 5: ...tter Buffer Delay 6 69 6 2 4 17 Destination Address and Destination Port 6 70 6 2 4 18 Local Multicast Address and Local Port 6 70 6 2 4 19 Stream Tx Rx Terrestrial Interface 6 71 6 2 4 20 Stream Tx Rx Identifier 6 71 6 2 4 21 Stream Tx Data Rate 6 71 6 2 4 22 Stream Tx Modulation 6 71 6 2 4 23 Stream Tx FEC Code Rate 6 72 6 2 4 24 Stream Tx Pilot Tones 6 72 6 2 4 25 Stream Tx Frame Size 6 73 6 2 ...

Страница 6: ...Operation 6 109 6 3 1 1 Cursor 6 109 6 3 1 2 Navigation Keys 6 109 6 3 1 3 Alphanumeric Keys 6 110 6 3 1 4 Special Function Keys 6 110 6 3 2 LCD Screen Layout 6 111 6 4 Front Panel Menu Structure 6 112 6 4 1 Main Menu 6 112 6 4 2 Status Menu 6 113 6 4 3 Edit Menu 6 114 6 4 3 1 Edit Tx Menu 6 115 6 4 3 2 Edit Rx Menu 6 116 6 4 3 3 Edit Unit Menu 6 117 6 4 4 View Menu 6 118 6 4 5 Test Menu 6 118 Cha...

Страница 7: ...C VLAN 7 18 7 8 6 IP Over ESC 7 19 7 8 7 IP Interoperability 7 20 7 8 8 IP Connectivity Modes 7 20 7 8 9 TCP Acceleration 7 20 7 8 10 Traffic Shaping 7 21 7 8 10 1 Guaranteed Bandwidth 7 21 7 8 10 2 Maximum Bandwidth 7 22 7 8 10 3 Priority 7 22 7 8 10 4 Stream Classification 7 22 7 8 10 5 Traffic Shaping Graphs 7 27 7 8 11 Static and Dynamic Routing 7 28 7 8 12 Header Compression 7 28 7 8 13 VLAN ...

Страница 8: ... Deframing Specifications 12 5 12 6 Drop and Insert Option Specifications 12 5 12 7 Extended Drop and Insert Option Specifications 12 6 12 8 BERT Option Specifications 12 6 12 9 AUPC Specifications 12 6 12 10 Traffic Log Specifications 12 7 12 11 Common Specifications 12 7 12 12 Internet Traffic 12 8 12 13 BUC LNB facilities 12 8 12 14 FEC BER PER Performance 12 9 12 14 1 DVB S2 S2X 12 10 12 14 2 ...

Страница 9: ...alled XStream IP This has been created in response to a perceived widespread dissatisfaction in the industry with the usability and quality of service provided by IP over satellite in general Paradise has re engineered every 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 ...

Страница 10: ...constellation monitors that facilitate the detection of any link degradation In addition LinkGuard U S patent 8351495 monitors underneath the received carrier for any interference while on traffic The Q Lite modem is backwards compatible with all Quantum and Evolution series modems DVB S2X the successor to DVB S2 is the most efficient and robust coding and modulation standard available for satelli...

Страница 11: ...Q Lite Satellite Modem Installation and Operating Handbook 1 3 Redundancy Switch operation is documented separately see Installation and Operating Handbook for Q Series Redundancy Switches ...

Страница 12: ...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 13: ...rovisions of EMC Low Voltage Directive 2006 95 EC and complies with the following standard EN 60950 1 2006 Safety of Information Technology Equipment Including Electrical Business Equipment Prior to installation and at all points during operation the following points must be observed This satellite modem requires the use of a regulated 24V power supply that provides a line conductor and ground con...

Страница 14: ...ve 2012 19 EU 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 6000 metres Extreme temperatures outside the stated operating range Excessive...

Страница 15: ... of Regulation Part 15 Subpart B All 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 interfac...

Страница 16: ...A A regulated 24V DC power supply must be used The power supply connector on the Q Lite allows for a second power supply to be connected in parallel in order to provide protection against the failure of a single supply Typical power consumption is 25W maximum power consumption is 33W No power supply or power cord is provided The installation of the satellite modem and the connection to the power s...

Страница 17: ... drawing of the circuit board dimensions is available on request from Technical Support The circuit board as supplied is suitable for incorporation into enclosures that mount the board to a metal chassis and employ fans to move air out of the box Power supply regulation devices dissipate heat via the circuit board mounting holes which need to be attached to a metal plate or chassis Other devices d...

Страница 18: ... be added to give the total height Figure 4 1 Q Lite Circuit Board Dimensions 4 5 1 Temperature Warnings and Alarms The modem operating temperature range is 40 C to 85 C Temperature is measured on the surface of the main PCB which will typically be hotter than the ambient temperature inside the enclosure by around 20 C It is the ambient temperature that is crucial to correct operation not the repo...

Страница 19: ...occurs due to the potential for the modem software to lose control over the hardware and for erratic behavior to occur The enclosure designer is responsible for coping with any temperature rise in the enclosure relative to the ambient temperature outside of the enclosure ...

Страница 20: ...oviding an advanced integrated suite of IP optimisation and traffic management features These include Transport Control Protocol TCP acceleration header and payload compression encryption static and dynamic routing Dynamic Host Control Protocol DHCP IEEE 802 1p Quality of Service QoS support IEEE 802 1q VLAN support traffic shaping and Adaptive Coding and Modulation ACM A dual IPv4 IPv6 TCP IP sta...

Страница 21: ...ellite of up to 200Mbps bidirectional Ethernet speed duplex and cable termination crossover versus straight through are auto negotiated Speed and duplex can also be set to fixed values if desired 5 3 Hardware Options 5 3 1 Terrestrial Interface Option Cards One terrestrial interface card may be fitted In addition a four port Ethernet switch for IP is provided as standard The Q Lite supports the sa...

Страница 22: ...ures are included as standard with the IDR option card Advanced AUX feature providing variable rate synchronous Aux channel This includes the option to replace IDR audio channels with serial data Audio option This allows two audio streams in 64kbps or two audio and 64kbps data in 128kbps 5 3 1 4 LVDS Option Card The Low Voltage Differential Signal LVDS option card part number P3001 provides LVDS a...

Страница 23: ...e available Paradise BUC power supply options The BUC PSU is a separate item from the satellite modem circuit board and therefore space must also be assigned in any custom enclosure design for the BUC PSU Part Number BUC PSU Type P3543 200W 48V output A C in D C out P3544 200W 24V output A C in D C out P3545 48V input 200W 48V output D C in D C out P3546 48V input 200W 24V output D C in D C out P3...

Страница 24: ... data rate 0 to 10Mbps D1H Enables data rates in the given range Terrestrial data rate 0 to 25Mbps DR2 Enables data rates in the given range Terrestrial data rate 0 to 60Mbps DR3 Enables data rates in the given range Terrestrial data rate 0 to 100Mbps DR4 Enables data rates in the given range Terrestrial data rate 0 to 200Mbps DR5 Enables data rates in the given range Table 5 2 Software Activated ...

Страница 25: ...VB2R Enables DVB S2 Rx operation for all supported modulations Includes SmartLink and XStream IP DVB S2X XStream IP XSIP This provides the following features IP traffic shaping Provides guaranteed throughput 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...

Страница 26: ...data rates in the given range Paired Carrier 10Mbps to 15Mbps PCMF Enables Paired Carrier data rates in the given range Paired Carrier 15Mbps to 20Mbps PCMG Enables Paired Carrier data rates in the given range Paired Carrier 20Mbps to 25Mbps PCMH Enables Paired Carrier data rates in the given range Paired Carrier 25Mbps to 30Mbps PCMI Enables Paired Carrier data rates in the given range Paired Car...

Страница 27: ...0 and 15 spectral roll off options Table 5 2 Software Activated Features 5 5 Optional Front Panel Figure 5 1 Optional Modem Front Panel The front panel shown in Figure 5 1 is an optional item suitable for attaching to approximately a half width enclosure and comprises Light Emitting Diodes LEDs that provide basic modem status A Liquid Crystal Display LCD that acts as the local user interface A key...

Страница 28: ...st mode Not used Tx Carrier Carrier muted Not used 1 1 standby Carrier active Table 5 3 Front panel LED Status 5 5 2 LCD Display The backlit LCD is a graphical display formatted to give three lines of 40 text characters and is highly legible even in strong ambient light The contrast is adjustable and the backlight can be switched off or on 5 5 2 1 Keypad The keypad see Figure 5 3 is incorporated i...

Страница 29: ...ard Connectors The Q Lite circuit board shown in Figure 6 4 provides a set of terrestrial and satellite data interfaces Additional functionality is accessible through the connectors on the Utility Card All connector pinouts are defined in Chapter 11 Figure 5 4 Q Lite Connector Functions ...

Страница 30: ...at there is an alarm and the closed state when the output is pulled to ground indicates the absence of any fault Tx L band Output This is a 50Ω TNC type femail connector The output power level can be varied from 0dBm to 30dBm Terrestrial Interface Position There is one terrestrial interface position that can be fitted with a variety of interface cards including EIA 530 G 703 Quad E1 Quad ASI LVDS ...

Страница 31: ...r under software control If the software option to remove the M C port out of the bridge is invoked then port 1 of the four port switch is reserved for M C only and the other ports for IP satellite traffic When the M C port is bridged to the other ports then M C and traffic can be passed using any port M C control can be via the Simple Network Management Protocol SNMP an embedded web server that s...

Страница 32: ... to four form C relay contacts that indicate alarm conditions An AGC output is provided that is suitable for peaking antenna position The alarm relays have the following definitions Unit Fault A fault exists on the unit indicating an equipment failure Traffic Prompt A Tx traffic fault exists Rx Traffic Prompt An Rx traffic fault exists Deferred Alarm One of the following conditions exists The rece...

Страница 33: ...ry stick Fan Connector This is a two pin Molex connector that provides the option to fit a cooling fan to the modem Paradise provides a modem fan option with the following characteristics 20mm height 12V 2 5W 12 0 CFM 65000 hour lifetime FSK Control Although not a connector as such the Utilities Card supports the FSK protocol for communicating with a BUC ...

Страница 34: ...ogged in at the 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 fron...

Страница 35: ...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 36: ... 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 37: ...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 38: ...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 39: ...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 40: ... for 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 ...

Страница 41: ... when AUPC is used with DVB S2 The status is shown as Failed if the link is not working correctly otherwise it will be shown as OK 6 2 2 6 Status BUC Under the Status BUC 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 t...

Страница 42: ...m 1 1 and 1 N redundancy 6 2 4 Edit Tx Rx Service Screen The Edit Tx Rx Service screen is shown in Figure 6 5 Figure 6 5 Edit Tx Rx Service Screen When a value is changed in an edit or dropdown box the background for the box will change to red while the modem is actioning the change as shown in the example below Example of Modem Actioning a User Requested Change The box will change back to its sta...

Страница 43: ...ptical Ethernet interface card to be fitted Optical Ethernet This enables the Optical Ethernet traffic interface and requires an STM 1 OC 3 Optical Ethernet interface card to be fitted RS422 This enables the RS422 traffic interface and requires an EIA 530 interface card to be fitted RS232 This enables the RS232 traffic interface and requires an EIA 530 interface card to be fitted V 35 This enables...

Страница 44: ...data This mode is compatible with other open network equipment IDR Reserved Intermediate Data Rate IDR is an open network standard that adds 96kbps of framing overhead to the data This mode is compatible with other open network equipment It requires an IDR option card to be fitted to the modem DVB S2 DVB S2 services can be used with both packetized and continuous data streams DVB S2 requires a har...

Страница 45: ...iguration options such as FEC frame size and pilots are available under Edit Tx Rx Advanced Table 6 2 Tx Rx Service 6 2 4 4 Tx Rx Rate Control Data rate This allows the user to enter a data rate from which a 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 ...

Страница 46: ... this to determine the terrestrial data rate When a baseband mode other than Continuous is used then the terrestrial data rate will be automatically fixed in accordance with the services that are being used such as the number of timeslots used for a G 703 service The minimum and maximum data rate limits are determined by a number of factors such as the terrestrial interface type type of service FE...

Страница 47: ...imilar 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 the Tx clock to be used to clock R...

Страница 48: ...e 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 Section 7 9 TPC This selects the Turbo Product Code TPC FEC Table 6 8 Tx Rx FEC Type...

Страница 49: ...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 to 33 of standard DVB S2 Short frame QPSK 2 5 7 15 8 15 3 5 2 3 11 15 4 5 13 15 14 15 8PSK 2 5 7 15 8 15 3 5 2 3 11 15 4 5 13 15 14 15 16APSK 2 5 7 15 8 15 3 5 2 3 11 15 4 5 13 15 14 15 32A...

Страница 50: ...uency will no longer be available and will be automatically controlled by the modem to achieve the requested BUC transmit frequency Table 6 11 Tx Rx Carrier Frequency L band Range 0 0GHz to 99 999GHz step size 0 0000001GHz i e 100Hz Description This is the BUC frequency used to transmit to satellite Table 6 12 BUC Carrier Frequency Range 0 0GHz to 99 999GHz step size 0 0000001GHz i e 100Hz Descrip...

Страница 51: ...chain that has introduced a spectral inversion Paradise recommends keeping the signals in the space segment non inverted particularly when Paired Carrier is being 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 ...

Страница 52: ...nced mode in Eb No required to achieve a specific BER level Low BER Provides better BER performance typically reducing the Eb No required to achieve a particular BER level by around 0 3dB compared to Balanced mode at the expense of higher latency Latency halves as data rate doubles so this mode is suitable for applications that are not latency sensitive and for higher data rate applications nomina...

Страница 53: ...p width 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 acquis...

Страница 54: ... Figure 6 7 Edit Tx Rx AUPC Screen Automatic Uplink Power Control AUPC is described in Section 7 2 It provides a method of overcoming rain fade in order to maintain a constant carrier to noise level It does this by attempting to maintain the remote Eb No at a specified target level by varying the local modem transmit power level 6 2 3 1 AUPC Mode Off The AUPC function is switched off Monitor remot...

Страница 55: ...ng the Tx power level Table 6 21 Target Remote Eb No 6 2 3 3 Maximum AUPC Power Offset Range 0dBm to 25 0dBm step size 0 1dBm Description This is the maximum increase in Tx power level that AUPC is allowed to make in order to maintain remote Eb No Table 6 22 Maximum AUPC Power Offset 6 2 3 4 Maximum Negative AUPC Power Offset Range 0dBm to 25 0dBm step size 0 1dBm Description This is the maximum d...

Страница 56: ... situation where the distant modem s demodulator has unlocked resulting in no Es No information being available from the distant modem In this situation you may for example want to increase the AUPC uplink level from the local modem to the maximum The Local demod unlocked action covers the situation where the local demodulator has unlocked also resulting in no Es No information being available fro...

Страница 57: ...BUC FSK This indicates that a BUC is fitted that has FSK communications to the modem BUC no comms This indicates that a BUC is fitted but has no communications to the modem No BUC This indicates that no BUC is fitted Table 6 27 BUC Interface 6 2 4 2 BUC LO Frequency Range 99 999GHz to 99 999GHz step size 0 0000001GHz Description This is the local oscillator frequency of the BUC Table 6 28 BUC LO F...

Страница 58: ... 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 It is strongly recommended that all 10MHz and DC services are switched off to the BUC and LNB before connecting or disconnecting the modem L band RF cables in order to avoid the potential for damage This is an On Off control used to enable and disable the 10MHz reference from the mod...

Страница 59: ...y Range 99 999GHz to 99 999GHz step size 0 0000001GHz Description This is the local oscillator frequency of the LNB Table 6 31 LNB LO Frequency 6 2 4 9 DC to LNB It is strongly recommended that all 10MHz and DC services are switched off to the BUC and LNB before connecting or disconnecting the modem L band RF cables in order to avoid the potential for damage This is an On Off control used to enabl...

Страница 60: ...s controls remote M C settings including serial control settings and user passwords Alarms This controls alarm thresholds and actions Station Clock This controls the station clock which replaces the internal 10MHz clock reference allowing a number of modems to share a common clock source SAF This allows the entry of Software Activated Feature SAF codes that enable modem feature activation in the f...

Страница 61: ...for user control of the modem Local In Local mode only the front panel can be used to control the modem Local remote In Local remote mode the modem accepts commands from any user interface at any time Table 6 32 Modem Control Passwords for the administrator login name admin and user login name user can be changed the default password for both is paradise Administrators can both view and control th...

Страница 62: ...als All login and configuration change activities are recorded in the modem s log giving greater visibility and accountability Server IP address This sets the IP address for a network server that supports the RADIUS AAA server to be used for authenticating users login credentials Fallback server IP address This sets the IP address for a fallback RADIUS network server to be used in the event that t...

Страница 63: ...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 64: ...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 65: ... 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 36 Modem Control Figure 6 10 Serial M C Interface IP ESC Extension Modes ...

Страница 66: ...ress 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 39 Serial M C Interface Baud Rate 6 2 6 7 Modem Identity The Modem identifier is a user assigned text string that is typically used to uniquely identify the modem satellite service or location It is displayed as the ID field on t...

Страница 67: ...this will activate all of the accumulated control changes This minimises service downtime when making configuration changes Switching off the submit mode reverts the modem to the mode where each control change is activated instantaneously It should be noted that the Q NET Navigator M C application which can be downloaded freely from the Paradise web site has the ability to configure hub and remote...

Страница 68: ...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 69: ...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 70: ...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 71: ...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 15 Figure 6 15 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 72: ...ingful levels of interference are detected This threshold check is enabled and disabled via the LinkGuard interference over threshold check control The threshold level setting itself is described in Table 6 40 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...

Страница 73: ... No values respectively Table 6 42 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 43 Buffer Slip Alarm Threshold 6 2 10 5 BUC DC Current Alarm Even when there is no communic...

Страница 74: ...on clock input is a way of providing a common clock to a number of modems in order to synchronize all satellite traffic to a master clock The modem s terrestrial interface clocking function both transmit and receive is slaved to the station clock input when it is active The station clock can be provided at any of a range of frequencies and does not need to be fixed at the precise data rate for the...

Страница 75: ...amming the terrestrial interface clocking logic Table 6 45 Station Clock Frequency when not locking the high stabiliy oscillator Options 10MHz 5MHz 2MHz 1MHz Description This must reflect the actual frequency of the station clock input as the modem does not automatically measure the frequency It is used by the modem in programming the terrestrial interface clocking logic Table 6 46 Station Clock F...

Страница 76: ...rt a 10 day activation of the modem s SAF features The Stop Demo Test Shot button is used to terminate the temporary activation of the modem s SAF features Any remaining time of the test period is lost The New SAF code edit box is used to enter a code provided by Paradise that unlocks additional modem features When unlocked the features immediately become available The act of unlocking SAF feature...

Страница 77: ...e file before starting the upgrade 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 on shown in Figure 6 20 The modem will restart automatically when the upgrade is complete and will resume operation using the same configuration as prior to the upgrade Figure 6 ...

Страница 78: ...modem has been recovered then the standard upgrade process can be repeated Upgrade from USB memory stick Create a new folder on the USB memory stick and name it upgrade Unzip the contents of the software upgrade zip file Q Flex x x xx zip to this folder Three files with the following names should now be present in the upgrade folder as shown in Figure 6 21 Figure 6 21 USB Memory Stick Upgrade File...

Страница 79: ...Rescue menu option It is possible to boot the modem to a basic web server that allows the software upgrade process to be repeated The basic web server will display a web page that allows you to navigate to the software upgrade file and when this is selected then the software will be upgraded as normal and the modem will reboot automatically at the end of the process To initiate the rescue process ...

Страница 80: ...few minutes During the boot process the contents of the front panel display will be incorrect and should be ignored 6 2 14 Edit Unit Miscellaneous Time Screen The Edit Unit Miscellaneous Time screen is shown in Figure 6 23 This allows the modem s real time clock to be set The modem incudes a battery and maintains the time even when powered down Figure 6 23 Edit Unit Miscellaneous Time Screen 6 2 1...

Страница 81: ...inated Universal Time UTC The modem will request the current time from the NTP server on a regular basis A time offset can be applied to the modem to account for any regional deviation from UTC Figure 6 25 Edit Unit Miscellaneous NTP Screen 6 2 2 Edit Unit Carrier ID Screen The Edit Unit Carrier ID screen is shown in Figure 6 26 This allows a low power spread spectrum signal containing user identi...

Страница 82: ...itted as part of the Carrier ID and allows a Carrier ID decoder to identify the location from which an interfering carrier is being generated 6 2 2 3 Carrier ID Custom Message and Telephone Number The Carrier ID Custom message and Telephone number fields are optional If entered this information will be transmitted as part of the Carrier ID signal and will be available for viewing via a suitable Ca...

Страница 83: ...eatures VCM multistreaming and MPEG2 transport streams traffic shaping QoS and static routes Ethernet speed duplex settings are available on the Edit Unit Interface screen Figure 6 27 Edit IP Screen 6 2 3 1 IP Mode Table 6 47 shows the IP mode options Bridge mode In this mode the modem acts as an Ethernet bridge preserving the original Ethernet frames including additional fields such as VLAN and M...

Страница 84: ...ate subnets then the following technique can be used IP should be selected as the mode for the ESC channel along with IP as the interface for the main channel If you then bridge the M C to the traffic port the main channel runs as a separate bridge connected to the IP traffic port but at the same time the ESC channel runs as a separate bridge between the M C ports of the two modems The traffic for...

Страница 85: ...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 86: ... 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 87: ...C standard RFC 3095 profiles 2 and 3 ROHC typically reduces the 40 bytes of IP UDP and RTP header which is typically used with Voice over IP data down to between 1 and 3 bytes Ethernet header compression is also supported in addition and this reduces 14 bytes of Ethernet frame down to typically 1 byte Overall savings from compression from both types of compression e g for a G 729 voice stream can ...

Страница 88: ... choice of modcod The modem will automatically insert regular Es No information into the return carrier with no material effect on bandwidth This is used to control the carrier modcod selection of the other modem should it have ACM enabled Monitor This is a test mode that simulates ACM being on but does not actually change modcod Instead it records what modcods would have been selected if ACM was ...

Страница 89: ...in between the actual Es No and the Es No required by the dynamically selected modcods Table 6 51 ACM Rain Fade Margin 6 2 3 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 add...

Страница 90: ...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 91: ...It adds an overhead of around 2 GSE This selects Generic Stream Encapsulation GSE as defined in the DVB S2X standard On the transmit side the modem implements the GSE High Efficiency Mode HEM since this gives the most efficient packing and padding thereby maximizing bandwidth utilization and efficiency On the receive side the modem implements both HEM and the GSE Lite mode GSE adds an overhead of ...

Страница 92: ... 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 with the highest always being sent first Strict priority queuing is active whenever Weighted...

Страница 93: ...tings but as part of the negotiation will advertise 10Mbps full duplex as the only option available 100M half duplex The modem will auto negotiate the Ethernet speed and duplex settings but as part of the negotiation will advertise 100Mbps half duplex as the only option available 100M full duplex The modem will auto negotiate the Ethernet speed and duplex settings but as part of the negotiation wi...

Страница 94: ...3 17 Ethernet MTU Range 2 000 bytes to 10 000 bytes step size 1 byte Description This controls the Ethernet Maximum Transmission Unit MTU size which defines the largest Ethernet frame that can be handled by the modem in bridging mode without fragmentation into smaller frames Table 6 58b Ethernet MTU 6 2 3 18 M C VLAN This is an On Off control that controls whether M C traffic destined for the mode...

Страница 95: ... allow local network devices to be allocated IP addresses from the modem and for those addresses to be hidden behind a single IP address when viewed from the far end of the satellite link 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 multipoint operation MPEG2 transport stream process...

Страница 96: ...Q Lite Satellite Modem Installation and Operating Handbook 6 63 Figure 6 28 Edit IP Advanced Screen ...

Страница 97: ...delay and the quality of the service in general can be controlled by the size of this buffer The buffer should be set large enough to even out peaks and troughs in throughput that would result from setting an extremely small buffer Setting the buffer larger than necessary could result in large packet delays building up should more packets be available than can be transmitted The traffic shaper can...

Страница 98: ...tands for Constant Delay The delay has been preset to 5ms from packet ingress to egress which is suitable for most applications It can be changed under the hood please contact Customer Support for details The effect of this is that transit times through the network typically continue to be constant even in an overload situation The use of AQM can be combined with traffic shaping to ensure that hig...

Страница 99: ... This is actually the address of a proxy DNS server on the modem as well as being the address of the DHCP server 6 2 4 7 DNS IP Address This is the address of an actual DNS server that the modem can use to satisfy any DNS requests that it receives The modem supports a proxy DNS server defined by the Traffic IP address and when DHCP and NAT are enabled will cache DNS results in order to reduce the ...

Страница 100: ... 6 2 4 10 DNS IP Address This sets the IP address of the DNS server to be used when the web proxy in the modem associated with web acceleration is switched on The DNS server is used to resolve the IP address associated with any domain name used in the users web browsers The modem will cache the results of DNS requests in order to reduce the number of satellite round trips required The DNS server I...

Страница 101: ...ll Ethernet ports on the modem will then be automatically forwarded to that address using the standard default port number specified for use with sFlow sFlow provides a convenient way of monitoring the quality of service provided by the modem along with all other sFlow aware network devices using standard tools that can understand and process modem Ethernet statistics without the need for any cust...

Страница 102: ...UDP headers or UDP and RTP headers 6 2 4 16 TS Data Rate and Nominal De jitter Buffer Delay These settings control a de jitter buffer that can be used to remove IP network jitter that may be present in MPEG over IP transport streams De jittering of multiple concurrent transport streams is supported regardless of whether the streams have been generated using independent clocks or not i e whether or...

Страница 103: ... the TS data rate Following null packet insertion and PCR restamping the de jittered stream will be transmitted at the Tx data rate 6 2 4 17 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 destination address is therefore used on the receive side in order to recreate a cop...

Страница 104: ... 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 Table 6 64 Stream Tx Rx Identifier 6 2 4 21 Stream Tx Data Rate Range 0 2Mbps to 200 0Mbps step size 0 000001Mbps Description The stream data rate is the maximum number of data bits that the modem will process in relation to the selected ...

Страница 105: ...5 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 QPSK 1 3 4 9 5 9 2 3 7 9 8 9 8PSK 1 3 4 9 5 9 2 3 7 9 8 9 16APSK 1 3 4 9 5 9 2 3 7 9 8 9 32APSK 1 3 4 9 5 9 2 3 7 9 8 9 Table 6 66 Tx Modulation and FEC Code Rates 6 2 4 23 Stream Tx FEC Code Rate Each stream can use any of the supported DVB S2 S2X F...

Страница 106: ... system involving the Q MultiFlex The operation of the modem with respect to packet processing is different in each case and therefore it is necessary to explicitly set the required mode Point to multipoint multistreaming is where the Q Flex receives a shared outbound consisting of multiple modcods where each stream in the outbound is using a different modcod from the other streams For example one...

Страница 107: ...twork and potentially causing packet storms When VLAN filtering is disabled VLAN tags are not generated or removed by the modem This means that no filtering of traffic based on VLAN ID takes place Since each remote modem receives the same broadcast traffic a device such as a router must be present to filter out any traffic that is intended only for the other remote modems When VLAN filtering is en...

Страница 108: ...load of Java applets used for graphing purposes This is done be installing a security certificate from the modem onto the browser device using the hyperlink provided at the bottom of the Edit IP Advanced screen The procedure is described in Section 6 2 10 View Screen under the title Minimizing Security Warnings When Viewing Graphs 6 2 5 Edit IP QoS Screen Traffic shaping is described in Section 7 ...

Страница 109: ...n 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 The Show Routes button can be used to display the underlying operating system route add commands applied to the TCP IP stack thereby providing confirmation of the active static route...

Страница 110: ...ore can be added via command line entry please contact Customer Support for details These determine which packets header compression is applied to Compression is both transparent and lossless Figure 6 30 Edit IP Header Compression Routes Screen Each route consists of a destination IP address and subnet mask The Add and Del buttons enable and disable each route respectively Note that routes can be ...

Страница 111: ...lapped 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 in order to subtract the unwanted near signal leaving just the far carrier Prior to enabling Paired Carrier it is necessary to set up the delay to satellite as in...

Страница 112: ...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 connected to each modem or using the modem internal PRBS BER test feature which can be temporarily enabled if necessary 3 Configure bo...

Страница 113: ...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 not data transparent then Ensure there is no spectral inversion in the RF chain If there is then this must be corrected b...

Страница 114: ...rface 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 pattern clashes between the two overlapping carriers caused by similarities in the satellite framing that otherwise can degrade ...

Страница 115: ...s 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 71 Satellite Longitude 6 2 8 4 Earth Station Longitude Range 180 Degrees to 180 Degrees step size 0 01 Degrees Description The longitudinal position corresponding to the modem location If using the modem front panel then the Up and Do...

Страница 116: ...be shared between different modems The following operations can be performed on configuration memories Store This allows the current M C configuration to be stored to a named configuration memory for later use Up to 20 configuration memories can be created more may be stored if memory allows The memories are non volatile and will persist between successive power ups of the modem Configuration memo...

Страница 117: ...e modem A specific configuration memory can be made active by selecting the associated Recall button The Delete button can be used to delete a configuration memory Figure 6 33 Edit Memories Recall Screen 6 2 9 2 Edit Memories Recall Advanced Reversionary Control Screen The Edit Memories Recall Advanced screen shown in Figure 6 34 supports a method for recovering a remote modem from a failure durin...

Страница 118: ...o be reloaded in the event of a failure during the configuration process 3 Set a reload time This is the period of time in minutes that the operator has to make all the necessary configuration changes to the remote modem It represents a timeout period after which the modem will automatically reload the selected configuration memory unless the operator intervenes to cancel the timeout 4 Click on th...

Страница 119: ...memoriy under a given name It also displays all of the configurations that are already stored on the modem The Delete button can be used to delete a specific configuration memory Figure 6 36 Edit Memories Store Screen 6 2 9 4 Edit Memories Download Screen The Edit Memories Download screen shown in Figure 6 37 displays all of the configuration memories that are stored on the modem and can be used t...

Страница 120: ... selecting the Upload Saved Configuration button causes the configuration to be transferred to the modem Figure 6 38 Edit Memories Upload Screen 6 2 10 Edit Redundancy Screen The Edit Redundancy 1 for 1 screen shown in Figure 6 39 controls the operation of the modem when in a 1 1 redundancy configuration The Edit Redundancy 1 for N screen and 1 N redundancy in general is documented separately in I...

Страница 121: ...affic warnings will never cause a switchover regardless of how the fail switchover settings are configured In a 1 1 pair the Clear 1 1 alarm button can be used on the Standby modem when it is exhibiting a fault to temporarily suppress the fault condition in order to allow the Standby modem to be forced online This is useful when both modems in the 1 1 pair are showing faults but the Standby modem ...

Страница 122: ...ated Once learning is completed then it is necessary only to switch predistortion on 1dB to 2dB of compensation for distortion is achievable The predistorter can only compensate for distortions in the signal that it is responsible for generating For this reason this feature can only be used if the HPA is being used to generate a single carrier The transponder itself can be multi carrier if the com...

Страница 123: ...ion of the learning process When the learning process indicates that it has stopped indicated by Stopped followed by an arbitrary number representing the number of iterations required to converge to the final compensation data then the Store screen shown in Figure 6 43 should be selected in order to store the predistortion compensation data to a file in the modem for subsequent use without this st...

Страница 124: ... 6 45 allows the following to be viewed Graphs These include spectrum constellation throughput and time based performance graphs None of these interfere with the service being provided by the modem Alarms System alarms and warnings can be viewed Log The system log can be viewed and optionally emptied The log contains information on all alarms and other noteable events The log contains space for th...

Страница 125: ...er device If Java is causing web browser security violations then is is recommended that the modem software is upgraded to a non Java version Alternatively please contact Paradise Technical Support for details of Java workarounds that allow Java to continue to be used 6 2 12 1 Rx Spectrum Monitor The Rx Spectrum Monitor shown in Figure 6 46 is a powerful real time spectrum analyser within the mode...

Страница 126: ...down A Reset zoom button appears and can be used to revert to the normal display resolution The mouse right click operation can be used to save the spectrum to a file Persistence leaves the spectrum to build up over time and is useful for identifying transient signals such as intermittent interference The Persistence button acts as an on off toggle Average increases the number of samples that are ...

Страница 127: ...Handbook 6 94 Figure 6 47 LinkGuard Signal Under Carrier Spectrum Monitor 6 2 12 2 Rx Constellaton Monitor The Rx Constellation Monitor feature shown in Figure 6 48 allows the modem to be used as a spectrum analyser to view the received signal spectrum ...

Страница 128: ...cts due to phase noise and interference Excessive phase noise can cause cycle skips seen as unwanted rotations within the constellation Note that MER and EVM figures are available on the panel on the right hand side These concepts are explained in the following information panel Modulation Error Ratio MER and Error Vector Magnitude EVM MER and EVM as displayed on the Rx Constellation Monitor measu...

Страница 129: ...ence Modern FECs have steep BER curves so the difference between quasi error free QEF operation and losing the link can be very small MER and EVM give an indication of how close to the cliff edge the link is and may allow remedial action to be taken before the link is lost It is good practice when deploying a link to measure these two values when the link is running well Then reduce the power leve...

Страница 130: ... 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 and 30 day time periods It is also possible to view the throughput associated with each individual traffic stream as classified by the...

Страница 131: ... 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 132: ... Graph Short time period 6 2 12 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 133: ... 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 52 Figure 6 52 Temperature Graph 6 2 12 5 Alarms System alarms can be viewed using the View Alarms screen shown in Figure 6 53 Alarms are latched and their status will be shown as Off if they are no longer active The Accept button can be used ...

Страница 134: ...n shown in Figure 6 54 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 54 System Log Screen 6 2 12 7 View Setup Screen The View Setup screen shown in Figure 6 55 displays the current values of the most important configuration settings ...

Страница 135: ...8 View Unit Screen The View Unit screen shown in Figure 6 56 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 136: ...shown in Figure 6 57 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 137: ...lows 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 only It should always be set to 0 when using IP over satellite Note that the use of this feature is currently incompatible with the use of IP traffic shaping as the two features compete for the same internal resources BER test T...

Страница 138: ...ms 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 caus...

Страница 139: ... test was started or restarted The Errors field indicates the total number of error bits detected since the test started The Average BER field indicates the number of bit errors in relation to the number of bits received Latency is shown in terms of both bits and time The Sync OK LED shows the instantaneous test pattern synchronisation status When the Rx path is synchronised to the incoming Tx tes...

Страница 140: ...d without requiring any additional test equipment Figure 6 60 shows an example of a modem set up to generate TCP where the M C address of the receiving modem is entered Figure 6 60 IP TCP Packet Generator Screen Figure 6 61 shows the set up of the receiving modem for the above and Figure 6 62 shows the bandwidth throughput results for this particular TCP test Figure 6 61 IP TCP Packet Receiver Scr...

Страница 141: ...ing Handbook 6 108 Figure 6 62 IP TCP Test Throughput Screen Figure 6 63 shows a ping facility built into the modem which can be used to test connectivity from the modem to other network devices and locations Figure 6 63 IP Connectivity Test Screen ...

Страница 142: ... of values is required such as for timeslots The Down arrow key moves the cursor down one line except 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 ...

Страница 143: ...ase and 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 remo...

Страница 144: ...of 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 appro...

Страница 145: ...lowing 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 mode...

Страница 146: ...Q Lite Satellite Modem Installation and Operating Handbook 6 113 6 4 2 Status Menu Figure 6 64 Front panel Status Menus ...

Страница 147: ...Q Lite Satellite Modem Installation and Operating Handbook 6 114 6 4 3 Edit Menu Figure 6 65 Front panel Edit Menus ...

Страница 148: ...Q Lite Satellite Modem Installation and Operating Handbook 6 115 6 4 3 1 Edit Tx Menu Figure 6 66 Front panel Edit Tx Menus ...

Страница 149: ...Q Lite Satellite Modem Installation and Operating Handbook 6 116 6 4 3 2 Edit Rx Menu Figure 6 67 Front panel Edit Rx Menus ...

Страница 150: ...Q Lite Satellite Modem Installation and Operating Handbook 6 117 6 4 3 3 Edit Unit Menu Figure 6 68 Front panel Edit Unit Menus ...

Страница 151: ...Q Lite Satellite Modem Installation and Operating Handbook 6 118 6 4 4 View Menu Figure 6 69 Front panel View Menus 6 4 5 Test Menu Figure 6 70 Front panel Test Menus ...

Страница 152: ...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 153: ...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 154: ... 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 155: ...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 156: ...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 157: ...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 158: ...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 159: ...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 160: ...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 161: ...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 162: ...quipment 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 50Ohm or 75Ohm and the appropriate frequency range Both demodulators wil...

Страница 163: ...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 164: ...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 165: ...nterference caused by another modulated carrier Note that the interference is sufficient to reduce the Es No of the carrier by around 4dB but is not obvious by looking only at the received carrier spectrum The modem I Q constellation graph is also shown Figure 7 9 Example LinkGuard Web Screenshots without with Interference LinkGuard provides a menu option for setting a power spectral density thres...

Страница 166: ...ency LDPC FEC design is a trade off between good BER performance and low latency TPC has low latency but BER performance can be 1dB or more worse than conventional LDPC For example TPC 8QAM at 5e 8 BER has an Eb No of 6 4dB compared to LDPC at 5 5dB Conventional LDPC latency can be many times that of TPC For example LDPC 16QAM at 64kbps has a latency of 395ms compared to TPC latency of 47ms which ...

Страница 167: ... 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 BER performance is defined on our modem datasheets ...

Страница 168: ... 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 169: ...ical 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 this increases to 500 000 packets to second It is good practice to put a switch or router between the modem and local network in order to minimize the number of packets the modem has to process as incidental network traf...

Страница 170: ... channel Since the ESC channel acts as a bridge some bandwidth may be consumed by broadcast traffic finding its way onto it and it is best to minimize this if possible The modem allocates private IP addresses to the two ends of the ESC link no user address set up is required The ESC channel in IP mode has some sophisticated M C modes as described in the following list in all cases IP packets desti...

Страница 171: ...hat supports Cisco HDLC which can convert it back to IP In general different modem manufacturer s IP even when using HDLC is not interoperable as there is no standard defined in this area If instead DVB S2 is used then generally IP is interoperable between different manufacturer s modems so long as incompatible IP features are not being used such as compression or acceleration 7 8 8 IP Connectivit...

Страница 172: ...ices over satellite to create fully provisioned end to end services thereby providing direct support for the implementation of customer service level agreements Key time based performance metrics are gathered continuously by the modem and can be extracted in order to be assimilated into customer quality of service reports A satellite modem in general normally acts as a transparent pipe for data so...

Страница 173: ...termined by the stream Priority setting In this case the allocation of the spare bandwidth between competing schemes will be done based on the priority level allocated to each stream This is done on an absolute basis if 256kbps of bandwidth is spare and two streams both want an additional 256kbps then all 256kbps will be allocated to the stream with the higher priority The priority setting also co...

Страница 174: ... Address It is possible to classify a data stream based on either the source and or the destination addresses in the IP packet as well as by a range for the source and or the destination port numbers in the TCP or UDP header in the packet Each address has an associated subnet mask that delimits the particular host subnet from the overall network If matching on a port is also selected then the pack...

Страница 175: ...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 176: ...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 10 4 3IEEE 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 177: ... 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 178: ... using its own CIR BIR etc Each packet passed to the modem must have this field set to the appropriate value in order for the modem to recognize the different data streams 7 8 10 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 ...

Страница 179: ...y 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 only be used on point to point links It...

Страница 180: ...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 Header compression runs up to 60...

Страница 181: ...iguration 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 the maximum modcod to be used when ACM is active This allows higher order modcods that cause non linear distortion in the RF chain to be avoided ACM will use all modcods up...

Страница 182: ...x 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 data grooming to match data priority to the available bandwidth Without this there would be no effective data management of a dynamically varying channel which would becom...

Страница 183: ...e SmartLink FEC in terms of BER performance is identical to DVB S2 Note that SmartLink has not yet been extended to work in DVB S2X mode DVB S2 does not directly support any of these SCPC features and therefore SmartLink was developed to allow existing SCPC services to benefit immediately by switching to the newer highly efficient DVB S2 technology without compromising the services being provided ...

Страница 184: ...s does not add any extra framing to that provided by DVB S2 DVB S2 S2X is provided as a Tx Rx service option whereas SmartLink is provided as an SCPC FEC option once an SCPC service has been selected If a DVB S2 only service is required for an interface other than IP then the Closed Network service should be selected along with the SmartLink FEC option This will provide a DVB S2 service with no ad...

Страница 185: ...n menu options become available including choice of modulation and FEC rate as well as DVB S2 S2X FEC frame size choice and DVB S2 S2X pilots DVB S2 S2X pilots introduce a regular burst of unmodulated carrier that helps the demodulator lock onto the signal in poor signal to noise conditions at a cost of increased overheads of around 2 4 ...

Страница 186: ... 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 sig...

Страница 187: ...nvert to a higher coding gain to decrease power Both symmetric and asymmetric point to point links are supported Symmetric links typically 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 sys...

Страница 188: ...aired Carrier can handle asymmetric carriers Q My transmit and receive carrier levels off satellite are different can I still use the Paired Carrier satellite signal canceller A Yes however the wanted and unwanted signal levels power spectral density should normally be within 10dB of each other Symbol rate asymmetry of up to 12 1 is supported It is sometimes possible to relax these conditions subj...

Страница 189: ...ime 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 five minutes in total Q Is Paired Carrier available as a field upgrade A Yes All Q Lite modems can be field upgraded to...

Страница 190: ...er Test Antenna Figure 7 17 Figure 7 17 Antenna Serial Control AGC Output The AGC output on the Alarms AGC connector can be set to be driven by various signals demodulator AGC Rx composite power Rx wanted signal level and Rx Eb No as shown in Figure 7 18 Figure 7 18 Antenna Serial Control Output Source Signal Selection The AGC output range is 0 to 10V A scaling factor can be applied to the output ...

Страница 191: ...on fail state Pin 7 is a Tx Mute input from the ACU It will inhibit transmission when active GPS is supported by the modem in general but not for beam switching therefore a GPS input is not required in relation to antenna control Antenna IP Control The OpenAMIP protocol is supported for use with antenna control units This feature is supported in the Antenna IP Control section of the Test Antenna m...

Страница 192: ... Monitor in Beacon Receiver Mode Figure 7 21 shows the beacon frequency to be 1200 5MHz and a received power level of 92dBm The noise floor is at 134dBm Hz and the total power across the band is 45 2 dBm In this particular case there were also adjacent carriers as follows Interferer 1 at 1198 6328MHz approximately 2MHz wide at a signal level of 40 5dBm Interferer 2 at 1202 3672MHz also approximate...

Страница 193: ...ier to noise measurement by analysing the spectrum graph data and looking for maximum and minimum signal levels This feature is useful when deploying a satellite terminal allowing the user to correctly identify the satellite that antenna is pointed towards While active the beacon detection interferes with the normal demodulation process of the modem but since beacon detection is normally a deploym...

Страница 194: ...ts back its current Es No and the Q MultiFlex will change each of the modcods independently in the shared outbound in order to maximise the throughput for the current conditions being experienced at each remote In all cases when interoperating with a Q MultiFlex the Q Flex must have the point to multipoint setting set to Point to multipoint or Point to multipoint multistreaming as described in Sec...

Страница 195: ...work 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 Lite Satellite Modem These must be sent to a spec...

Страница 196: ... 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 197: ...ncy Operation The G 703 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 ...

Страница 198: ...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 199: ... 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 200: ...f 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 to...

Страница 201: ...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 202: ...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 203: ...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 204: ...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 205: ...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 206: ...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 207: ...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 208: ...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 209: ... Pinouts Q Lite Compact Modem Circuit Board POWER 4 way screw terminal Pin 1 24 Volts 2 24 Volts 3 Ground 4 Ground ETHERNET 10 100 1G 4 x RJ45 TX 50 Ohm TNC RX 50 Ohm TNC FAN J12 2 pin Molex Pin 1 12 Volts 2 Return ALARM J51 2 pin Molex Pin 1 N C fail condition is open circuit 2 Ground ...

Страница 210: ...nable 6 R nW 7 D1 8 D0 9 D3 10 D2 11 D5 12 D4 13 D7 14 D6 15 LED K 16 LED A MEMBRANE 20 way ZIF Pin 1 Row 4 2 Row 0 3 Row 3 4 Row 1 5 Row 2 6 Carrier Green 7 Carrier Yellow 8 Test Green 9 Test Yellow 10 3 3 Volts 11 Tx Green 12 Tx Yellow 13 Rx Green 14 Rx Yellow 15 Unit Green 16 Unit Red 17 Column 1 18 Column 2 19 Column 0 20 Column 3 ...

Страница 211: ...ensity Pin 1 Alarm 4 N O Deferred Alarm 2 Alarm Common 3 Alarm 3 N O Rx Traffic Fault 4 Alarm 1 N O Unit Fault 5 Alarm 2 N O Tx Traffic Fault 6 DAC out 7 Tx Inhibit 8 Rx Data 9 Alarm 4 N C 10 Alarm 3 N C 11 Alarm 1 N C 12 Alarm Common 13 Alarm 2 N C 14 Tx Data 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 ...

Страница 212: ... relays fall back to the non normal ie non energised alarm state 1 N 1 1 9 pin Male D type Pin 1 Ground 2 Line In 3 Line Out 4 Serial In A 5 Serial IN B 6 Fail In 7 Fail Out 8 Serial Out A 9 Serial Out B A standard 1 1 lead part number P1391 is available from Teledyne Paradise Datacom The lead is 10cm long STATION CLOCK 75 Ohm BNC FAN 2 pin Molex Pin 1 12 Volts 2 Return ...

Страница 213: ...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 214: ...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 215: ...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 216: ...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 217: ...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 218: ... 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 219: ...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 220: ...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 221: ...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 222: ...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 223: ...al Ethernet on small form factor pluggable module LVDS 25 pin female D type Option HSSI 50 pin SCSI 2 type connector Quad E1 four balanced G 703 on RJ45 connectors User Traffic Data Rate 2 4kbps 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 200Mbps Extensions are cumulative User Traffi...

Страница 224: ...cy to 33 of standard DVB S2 Short frame QPSK 2 5 7 15 8 15 3 5 2 3 11 15 4 5 13 15 14 15 8PSK 2 5 7 15 8 15 3 5 2 3 11 15 4 5 13 15 14 15 16APSK 2 5 7 15 8 15 3 5 2 3 11 15 4 5 13 15 14 15 32APSK 2 5 7 15 8 15 3 5 2 3 11 15 4 5 13 15 14 15 DVB S2X Paradise Ultra Short Frame Frame size of 3 240 bits reducing latency to 20 of standard DVB S2 Short frame QPSK 1 3 4 9 5 9 2 3 7 9 8 9 8PSK 1 3 4 9 5 9 ...

Страница 225: ...oll off factors of 5 10 15 20 25 and 35 See the document Saving Satellite Bandwidth by Optimising Spectral Roll off document number AN_035 from the White Papers section of http www paradisedata com for more details including occupied bandwith calculations Occupied Bandwidth See referenced document AN_035 above Recommended Channel Spacing See referenced document AN_035 above Phase Accuracy 2º maxim...

Страница 226: ...mance 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 Integrity Frequency Locked Loops give phase hit immune operation even with poor clock sources s...

Страница 227: ...5 12 6 Drop and Insert Option Specifications Parameter Modem Bearer Types T1 D4 T1 ESF and E1 G 732 Timeslot Selection Independent selection of arbitrary timeslots for both drop and insert Bearer Generation The terrestrial bearer may be looped through the Drop Mux then Insert Mux or terminated after the Drop Mux and a new blank bearer generated by the insert Mux The bearer generated within the Ins...

Страница 228: ...ations Parameter Modem BER Channel The BERT may operate through main traffic or ESC channel Use of ESC channel allows continuous real traffic BER performance monitoring while the modem carries traffic Test Patterns 211 1 215 1 220 1 and others compatible with common standalone BER testers Results Display of error count and average BER Autolog Automatic logging of average BER and other parameters a...

Страница 229: ... be stored and recalled from the front panel or remote M C Memories can be labeled with text string to aid identification User Interface Clear and intuitive web browser operator interface with plain English dialogue Optional graphic display backlit high contrast wide angle LCD and 17 key tactile keyboard Remote Monitor and Control For multi drop applications RS485 interface For direct to PC applic...

Страница 230: ...features are switched on is subject to data rate packet size and the specific combination of features Please contact Technical Support for help with assessing suitability for specific applications 12 13 BUC LNB facilities Parameter Modem BUC Power Supply Options Any BUC PSU up to 200W can be connected to the Q Lite which will route the power out through the Tx TNC to the BUC LNB Power 15 24V 0 5A ...

Страница 231: ... at a specific point on the curve Therefore the difference between the performance stated in this section and true QEF points where there are effectively no errors can be as little as 0 1 or 0 2dB This level of discrimination is extremely hard to measure without a complex test set up and a great deal of care If you have concerns on this issue then please contact our technical support team Note tha...

Страница 232: ...Q Lite Satellite Modem Installation and Operating Handbook 12 10 12 14 1 DVB S2 S2X Figure 12 1 PER for DVB S2 Normal Frames ...

Страница 233: ...Q Lite Satellite Modem Installation and Operating Handbook 12 11 Figure 12 2 PER for DVB S2 Short Frames ...

Страница 234: ...Q Lite Satellite Modem Installation and Operating Handbook 12 12 Figure 12 3 PER for DVB S2X Normal Frames ...

Страница 235: ...Q Lite Satellite Modem Installation and Operating Handbook 12 13 Figure 12 4 PER for DVB S2X Short Frames ...

Страница 236: ...Q Lite Satellite Modem Installation and Operating Handbook 12 14 12 14 2 FastLink Figure 12 5 BER for FastLink 12 14 3 TPC Figure 12 6 BER for TPC ...

Страница 237: ...Q Lite Satellite Modem Installation and Operating Handbook 12 15 12 14 4 DVB S DSNG Figure 12 7 BER for DVB S DSNG ...

Страница 238: ...23 55 DVB S2X 16APSK 13 18 285 63 128 53 DVB S2X 16APSK 7 9 307 73 138 47 DVB S2X 16APSK 77 90 338 67 152 39 DVB S2X 32APSK L 2 3 263 53 118 58 DVB S2X 32APSK 32 45 351 02 157 95 DVB S2X 32APSK 11 15 362 06 162 92 DVB S2X 32APSK 7 9 384 13 172 85 DVB S2X 64APSK L 32 45 420 65 166 15 DVB S2X 64APSK 11 15 433 87 171 37 DVB S2X 64APSK 7 9 460 32 181 82 DVB S2X 64APSK 4 5 473 54 187 04 DVB S2X 64APSK ...

Страница 239: ...53 FEC Modulation FEC Rate Min Data Rate kbps Max Data Rate Mbps FastLink BPSK 0 499 9 00 19 98 FastLink O QPSK 0 532 19 18 42 62 FastLink O QPSK 0 639 23 02 51 13 FastLink O QPSK 0 710 25 56 56 80 FastLink O QPSK 0 798 28 76 63 90 FastLink 8PSK 0 639 26 85 76 70 FastLink 8PSK 0 710 29 82 85 20 FastLink 8PSK 0 778 32 71 93 44 FastLink 8QAM 0 639 18 00 40 00 FastLink 8QAM 0 710 38 35 85 20 FastLink...

Страница 240: ...PSK VIT RS 7 8 7 5 23 33 O QPSK VIT SEQ 1 2 9 6 30 2 O QPSK VIT SEQ 3 4 14 4 45 2 O QPSK VIT SEQ 7 8 16 8 52 5 2 O QPSK VIT RS 1 2 8 6 26 67 O QPSK VIT RS 3 4 12 8 40 O QPSK VIT RS 7 8 15 46 67 O QPSK TPC 1 2 2 4 12 O QPSK TPC 3 4 14 4 60 O QPSK TPC 7 8 16 8 60 O QPSK TPC 0 93 17 9 60 8PSK TCM 2 3 19 2 60 8PSK TCM RS 2 3 17 7 60 8PSK TPC 3 4 21 6 60 8PSK TPC 7 8 25 2 60 8PSK TPC 0 93 26 8 60 16QAM...

Страница 241: ...dancy Check CW Continuous Wave ESC Engineering Services Channel FEC Forward Error Correction LCD Liquid Crystal Display IBS Intelsat Business Service IESS Intelsat Earth Station Standard IDR Intermediate Data Rate M C Monitor and Control MIB SNMP Management Information Base Mux Multiplexer OQPSK Offset Quaternary Phase Shift Keying PCB Printed Circuit Board PUP Paradise Universal Protocol PLL Phas...

Страница 242: ... Please refer to the equipment warranty statement for full details of returning equipment for repair or upgrade In summary 1 Ensure the equipment really does have a fault 2 Write an explicit fault report including what appears to be wrong the circumstances under which it occurs and what other equipment is involved 3 Provide an official Purchase Order to cover the cost of any repairs or sign discla...

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