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1. As DoubleTalk Carrier in Carrier allows equivalent spectral efficiency using a lower order modulation and or FEC Code it can simultaneously reduce CAPEX by allowing a smaller BUC HPA and or antenna Alternatively DoubleTalk Carrier in Carrier can be used to achieve very high spectral efficiencies E g DoubleT alk Carrier in Carrier when used with 16 QAM approaches the bandwidth efficiency of 256 QAM 8 bps Hz When combined with VersaFEC or LDPC TPC it can provide unprecedented savings in transponder bandwidth and power utilization This allows for its successful deployment in bandwidth limited and power limited scenarios as well as reduction in Earth Station BUC HPA power requirements VERSAFEC FORWARD ERROR CORRECTION CDM 625 is the first modem to offer VersaFEC a patented covered by U S patents 7 353 444 and 7 415 659 other patents pending system of high performance short block low latency LDPC codes designed to support latency sensitive applications such as cellular backhaul over satellite VersaFEC provides excellent coding gain with lowest possible latency VersaFEC s Eb No performance is similar to that of DVB S2 short block or LDPC 16k block with 70 90 lower latency Compared to TPC VersaFEC can provide coding gain of 1 0 dB or more ADAPTIVE CODING amp MODULATION ACM Satellite users have traditionally relied on worst case link margin to overcome rain fade which leads to significant inefficiencies ACM co2. CDM 625 Advanced sal OMTECH unir status sronto event C EE DTA MANN Tx TRAFFIC nemore CDM 625 Ax TRAFFIC comac mooe O gt onune test mooc O SATELLITE MODEM INTRODUCTION The CDM 625 Advanced Satellite Modem builds on Comtech EF Data s legacy of providing the most efficient satellite modems It is the first modem to combine advanced Forward Error Correction FEC such as VersaFEC and Low Density Parity Check LDPC codes with the revolutionary DoubleTalk Carrier in Carrier bandwidth compression allowing for maximum savings under all conditions This combination of advanced technologies enables multi dimensional optimization allowing satellite communications users to e Minimize operating expenses OPEX e Maximize throughput without using additional transponder resources e Maximize availability margin without using additional transponder resources e Minimize capital expenses CAPEX by allowing a smaller BUC HPA and or antenna e Or a combination to meet specific business needs The advanced technologies and features of CDM 625 are covered by a number of U S patents including 7 254 188 7 353 444 7 415 659 and other pending patents APPLICATIONS TYPICAL USERS e Cellular Backhaul e Mobile Operators e G 03 Trunking e Telecom Operators e IP Trunking e Satellite Service e Offshore amp Maritime Providers Communications e Government amp Military e Enterprise e Enterprise e Comm
3. other single sideband spurious from 0 to 0 75 x symbol rate is 48 dBc or lower 50 180 MHz 0 to 25 dBm 0 1 dB steps 0 to 20 dBm in CDM 600 emulation mode 950 2000 MHz 0 to 40 dBm 0 1 dB steps 0 to 45 dBm in CDM 600L emulation mode but power accuracy and spurious only guaranteed to 40 dBm 50 180 MHz 0 5 dB over frequency data rate modulation type and temperature range of 15 to 35 C 0 8 dB over frequency data rate modulation type and temperature range of 0 to 50 C 950 2000 MHz 0 7 dB over frequency data rate modulation type and temperature range of 15 to 35 C 1 0 dB over frequency data rate modulation type and temperature range of 0 to 50 C Advanced Communicati Output Impedance amp Return Loss Clocking Options External TX Carrier Off BUC Reference 10 MHz BUC Power Supply HW Option DEMODULATOR Input Power Range Desired Carrier Max Composite Operating Level Absolute Maximum Adaptive Equalizer Acquisition Range Acquisition Time Plesiochronous Doppler Buffer Receive Clock Clock Tracking LNB Reference 10 MHz LNB Voltage Monitor Functions 50 180 MHz 50 Q 75 Q 16 dB minimum return loss 18 dB typical BNC Connector 950 2000 MHz 50 Q 19 dB minimum return loss 21 dB typical Type N Connector Internal 0 06 ppm SCT External locking over a 100 ppm range TT Loop timing RX satellite clock supports asymmetric operation Ext
4. 5 docx 2010 Comtech EF Data 3 12 2010
5. BUC HPA size by eliminating the multi carrier backoff A proprietary closed network Drop amp Insert D amp l allows for Dropping or Inserting any combination of 1 to 31 time slots on each El D amp l is supported for E1 CCS only For QDI operation all Els must have a common clock source IP SUB MULTIPLEXER The IP Sub Mux allows multiplexing IP Ethernet traffic with serial or G 703 traffic into a single carrier This is particularly useful for cellular backhaul when both E1 and IP backhaul is required This reduces the number of modems and could possibly reduce the BUC HPA size by eliminating the multi carrier backoff EDMAC amp AUPC The CDM 625 supports EDMAC EDMAC 2 EDMAC 3 and AUPC EDMAC EDMAC 2 EDMAC 3 can be used to monitor and control the distant end of a satellite link using a proprietary overhead channel EDMAC 3 is also used for SNMP management of the distant end modem AUPC enables automatic uplink power control for a duplex link MANAGEMENT amp SNMP PROXY The modem can be managed via the front panel the remote M amp C port EIA 232 EIA 485 or the 10 100Base T Ethernet port With support for SNMP HTTP and Telnet the modem can be easily integrated into an IP based management system The CDM 625 can also act as SNMP proxy for the distant end modem This allows distant end modem management using SNMP without requiring an end to end IP link CDM 600 CDM 600L EMULATION MODE CDM 625 can be placed in CDM 600 o
6. X Terrestrial External Reference 100 ppm minimum Via RX IF center conductor 10 0 MHz 0 06 ppm With internal reference selectable ON OFF 3 0 dBm 3 dB Selectable ON OFF 13 VDC 18 VDC per DiSEq 4 2 and 24 VDC at 500 mA maximum E Noestimate Corrected BER Frequency offset Buffer fill state Receive signal level CDM 625 Advanced Satell with DoubleTalk Carrier i DOUBLETALK CARRIER IN CARRIER Delay Range Power Spectral Density Ratio Interferer to Desired Maximum Symbol Rate Ratio Eb No Degradation Satellite Restrictions 0 to 330 ms BSPK QPSK 8 PSK 8 QAM 7 dB to 11 dB 16 QAM 7 dB to 7 dB 3 1 TX RX or RX TX 0 dB Power Spectral Density R atio BPSK QPSK OQPSK 0 3 dB 8 QAM 0 4 dB 8 PSK 0 5 dB 16 QAM 0 6 dB 10 dB Power Spectral Density Ratio Additional 0 3 dB Satellite in loop back mode i e the Transmit Station can receive itself Non processing satellite i e does not demodulate or remodulate the signal ENVIRONMENTAL AND PHYSICAL Temperature Power Supply Power Consumption Physical Dimensions height x width x depth 1RU Weight CE Mark FCC Operating 0 to 502C 32 to 122 F Storage 25 to 852C 13 to 1852F 100 240 VAC 6 10 50 60 Hz Auto sensing 48 VDC HW Option 48 W typical with TPC LDPC Codec and Carrier in Carrier module installed 55 W max 60 W typical with TPC LDPC Codec IP Packet Processor and Carrier
7. bps DoubleTalk Carrier in Carrier License Full 512 kbps 1 1 Mbps 2 5 Mbps 5 Mbps 10 Mbps 15 Mbps 20 Mbps or 25 Mbps DoubleTalk Carrier in Carrier License Fractional 2 5 Mbps 5 Mbps 10 Mbps 15 Mbps 20 Mbps or 25 Mbps VersaFEC Codec Data Rate CCM 2 5 Mbps 5 Mbps or 16 Mbps VersaFEC Codec Symbol Rate ACM 300 ksps 1 2 Msps or 4 1 Msps Open Network IBS with High Rate IBS ESC IDR and Audio D amp I D amp l For Single Port T1 E1 D amp l For Quad El Port 2 3 and 4 Quality of Service requires IP Packet Processor Header Compression requires IP Packet Processor Payload Compression requires IP packet processor 1 1 Modem Redundancy Switch L Band 1 1 Modem Redundancy Switch 70 140 MHz 1 10 Modem Redundancy Switch Not available with IP Packet Processor 1 10 IF Redundancy Switch 70 140 MHz 1 10 IF Redundancy Switch L Band Ext Ser chersa tap Cover ror pawr supoly fa alng Getewe ay IN Active gt o eG of Data interlace Remote Comet M ee nae O 7ONA Comtech EF Data reserves the right to change specifications of products described in this document at any time without notice and without obligation to notify any person of such changes Information in this document may differ from that published in other Comtech EF Data documents Refer to the website or contact Customer Service for the latest released product information P art Number ds cdm62
8. d 1 10 redundancy switches available Backwards compatible with CDM 500 CDM 550 CDM 550T CDM 570 L and CDM 600 L Satellite Modems Interoperable with many Comtech EF Data Satellite Modems CDM Qx L SDM 8000 300A and 300L3 DOUBLETALK CARRIER IN CARRIER DoubleTalk Carrier in Carrier based on patented Adaptive Cancellation technology allows transmit and receive carriers of a duplex link to share the same transponder space Figure 1 shows the typical full duplex satellite link where the two carriers are adjacent to each other Figure 2 shows the typical DoubleT alk Carrier in Carrier operation where the two Carriers are overlapping thus sharing the same spectrum Carrier 1 Carrier 2 Figure 1 Traditional Full Duplex Link ein ae ra Composite m eO di J P TE m Carrier 1 f j Carrier 2 FE Se T iaki Figure 2 Duplex Link with DoubleTalk Carrier in Carrier CDM 625 Advanced Satellite Modem with DoubleTalk Carrier in Carrier When observed on a spectrum analyzer only the Composite is visible Carrier 1 and Carrier 2 are shown in Figure 2 for reference only DoubleT alk Carrier in Carrier is complementary to all advances in modem technology including advanced FEC and modulation techniques As these technologies approach theoretical limits of power and bandwidth efficiency DoubleT alk Carrier in Carrier utilizing advanced signal processing techniques provides a new dimension in bandwidth and power efficiency
9. ernal Clock By TTL low signal or external contact closure Via TX IF center conductor 10 0 MHz 0 06 ppm With internal reference selectable ON OFF 0 0 dBm 3 dB 24 VDC 4 17 Amps max 90 W 50 C 48 VDC 3 125 Amps max 150 W 50 C 180 W 30 C Supplied through TX IF center conductor and selectable ON OFF via M amp C control 50 180 MHz 105 10 log symbol rate to 70 10 log symbol rate dBm 950 2000 MHz 130 10 log symbol rate to 80 10 log symbol rate dBm 50 180 MHz 94 10 log symbol rate desired carrier dBc 10 dBm max with the additional requirement that within 10 MHz of the desired carrier the composite power is lt 30 dBc 950 2000 MHz 102 10 log symbol rate desired carrier dBc 10 dBm max with the additional requirement that within 10 MHz of the desired carrier the composite power is lt 30 dBc 20 dBm 5 tap design selectable ON OFF Programmable in 1kHz increments Below 64 ksymbols sec 1 kHz to Rs 2 kHz where Rs symbol rate in ksymbols sec Between 64 and 389 ksymbols sec 1 kHz to 32 kHz Above 389 ksymbols sec 1 kHz to 0 1 Rs kHz up to a maximum of 200 kHz Highly dependent on data rate FEC rate and demodulator acquisition range E g 120 ms average at 64 kbps R1 2 QPSK 10 kHz acquisition sweep range 6 dB Eb No Selectable from 64 to 262 144 bits in 16 bit steps Additional limitations for G 704 frame boundaries RX Satellite T
10. in C arrier module installed 67 W max 280 W typical with TPC LDPC Codec Carrier in Carrier module and 48 VDC BUC power supply installed 300 W max 1 75 x 19 0 x 17 65 4 4 x 48 x 44 8 cm approximate 10 8 Ibs 4 9 kg maximum with all option modules and 48 VDC BUC power supply installed EN 55022 Class B EN 61000 4 4 Emissions EN 61000 4 5 EN 50082 1 Immunity EN 61000 4 6 EN 60950 Safety EN 61000 4 8 EN 61000 4 9 EN 61000 3 2 EN 61000 3 3 EN 61000 4 2 Part15 Class B EN 61000 4 11 EN 61000 4 13 EF DATA MIMMIII AVAILABLE OPTIONS Hardware Hardware Hardware Hardware Hardware Hardware Hardware Hardware FAST FAST FAST FAST FAST FAST FAST FAST FAST FAST FAST FAST FAST FAST FAST ACCESSORIES CRS 170A CRS 180 CRS 300 CRS 280 CRS 280L 100 240 VAC 175W AC Primary Power Supply 48 VDC 125 W Primary Power Supply 24 VDC 90 W 50 C BUC Power Supply AC or DC Primary Power Supply 48 VDC 150 W 50 C 180 W 30 C BUC Power Supply AC or DC Primary Power Supply Integrated TPC 2 4 Generation and LDPC Codec Module DoubleTalk Carrier in Carrier Module VersaFEC Codec Module IP Packet Processor L Band IF in addition to 70 140 MHz Modem Data Rate 10 Mbps 15 Mbps 20 Mbps or 25 Mbps 8 PSK and 8 QAM Modulation 8 QAM requires TPC LDPC or VersaFEC Codec 16 QAM Modulation TPC LDPC Codec Data Rate 10 Mbps 15 Mbps 20 Mbps or 25 M
11. nverts the fade margin into increased throughput gain of 100 or more is possible The CDM 625 with VersaFEC was specifically architected to support ACM for IP Ethernet traffic ACM maximizes throughput under all conditions rain fade inclined orbit satellite operation antenna mis pointing noise interference and other impairments VersaFEC ACM can provide almost 85 reduction in latency compared to DVB S2 short block ACM can also be used with DoubleTalk Carrier in Carrier LOW DENSITY PARITY CHECK CODES LDPC amp TURBO PRODUCT CODES TPC CDM 625 offers an integrated LDPC and 2 Generation TPC codec LDPC is an advanced Forward Error Correction technique capable of providing performance much closer to Shannon limit The current LDPC implementation can provide 0 7 to 1 2 dB additional coding gain compared to an equivalent TPC code In order to take full advantage of the increased coding gain provided by LDPC Comtech EF Data has developed a patented 8 QAM modulation U S patent 7 254 188 that allows for acquisition and tracking at much lower Eb No compared to 8 PSK DUAL BAND CAPABILITY CDM 625 supports 70 140 MHz and L Band capability in the Same unit with independently selectable transmit and receive IF This simplifies sparing and stocking in networks requiring 70 140 MHz and L Band units 4 PORT MANAGED ETHERNET SWITCH WITH VLAN amp QoS CDM 625 base modem incorporates a 4 port 10 100Base T managed Ethernet swi
12. r CDM 600L emulation mode This permits easy integration into an existing CDM 600 L setup without changes to M amp C platform or redundancy switches FEATURE ENHANCEMENTS Enhancing the capability of the CDM 625 in the field is easy Features that do not require additional hardware can be added on site using FAST access codes purchased from Comtech EF Data Data Rate Symbol Rate Operating Frequency Major Operating Modes See User Manual For Details FEC Options None Viterbi k 7 per IESS 308 309 Viterbi with Reed Solomon Sequential Reed Solomon TCM Per 1ESS 310 Integrated LDPC and TPC 2 4 Gen Codec Optional Plug in Module VersaFEC Codec Optional Plug in Module Scrambling Management Form C Relays External Reference Input OR Output SYSTEM SPECIFICATIONS 18 kbps to 25 Mbps in 1 bps steps Modulation FEC amp Data Interface dependant 18 ksps to 12 5 Msps 50 180 MHz Standard AND 950 2000 MHz Option 100 Hz Resolution Independent TX and RX operation Open Network per IESS 308 309 310 314 Transparent Closed Network per IESS 315 LDPC TPC Codec Optional Plug in Module VersaFEC Codec Optional Plug in Module with Adaptive Coding amp Modulation or Constant Coding amp Modulation EDMAC Framed with without AUP C RS Outer Codec High Rate ESC Enhanced ESC ESC Drop amp Insert D amp I Enhanced D amp l Quad E1 Drop amp Insert QDI DoubleTalk Carrie
13. r in Carrier Optional Plug in Module Uncoded BPSK QPSK OQPSK Rate 1 2 BPSK QPSK OQPSK Rate 3 4 QPSK OQPSK Rate 7 8 QPSK OQPSK Rate 3 4 16 QAM Rate 7 8 16 QAM See CDM 625 User Manual for details Open Network and Closed Network modes 8 PSK TCM Rate 2 3 LDPC Code Rates Rate 1 2 BPSK QPSK OQPSK Rate 2 3 QPSK OQPSK 8 PSK 8 QAM Rate 3 4 QPSK OQPSK 8 PSK 8 QAM 16 QAM TPC Code Rates Rate 5 16 BPSK Rate 21 44 BPSK QPSK OQPSK Rate 3 4 QPSK OQPSK 8 PSK 8 QAM 16 QAM Rate 7 8 QPSK OQPSK 8 PSK 8 QAM 16 QAM Rate 0 95 QPSK OQPSK 8 PSK 8 QAM BPSK Rate 0 488 QPSK Rate 0 533 0 631 0 706 0 803 8 QAM Rate 0 642 0 711 0 780 16 QAM Rate 0 731 0 780 0 829 0 853 IDR Mode no RS per ITU V 35 Intelsat variant IBS mode no RS per lESS 309 externally frame synchronized Transparent Closed Network mode no RS or TPC LDPC per ITU V 35 Intelsat variant EDMAC mode no RS coding externally frame synchronized proprietary TPC LDPC modes externally frame synchronized proprietary AllRS modes externally frame synchronized per IESS 308 309 310 10 100Base T Ethernet with SNMP HTTP and Telnet support EIA 232 EIA 485 2 or 4 wire Hardware fault RX and TX Traffic Alarms Open Network Backward Alarms BNC Connector Input 1 2 5 or 10 MHz 6 dBm to 10 dBm 50 Q 75 Q nominal Output 10 MHz 2 7 V peak to peak 0 4 V Low Impedance Output CDM 625 Advanced Satellite Modem with DoubleTalk Carrier in Ca
14. rates industry leading payload compression for IP traffic Implemented in the hardware for maximum throughput and efficiency payload compression can reduce the required satellite bandwidth by as much as 40 50 Streamline Encapsulation SLE The IP Packet Processor incorporates Comtech EF Data s patent pending very low overhead Streamline Encapsulation SLE SLE can reduce the encapsulation overhead by as much as 65 compared to industry standard HDLC Advanced Quality of Service QoS The IP Packet Processor Incorporates multi level QoS to ensure the highest quality service with minimal jitter and latency for real time traffic priority treatment of mission critical applications and maximum bandwidth efficiency Supported modes are e DiffServ Industry standard method of providing QoS enabling seamless co existence in networks that implement DiffServ e Max Priority Provides multi level traffic prioritization with the ability to limit maximum traffic per priority class e Min Max Provides a Committed Information Rate CIR to each user defined class of traffic with the ability to allow a higher burstable rate depending on availability QUAD E1 INTERFACE QDI WITH ENHANCED D amp l The CDM 625 supports a Quad E1 interface that can aggregate up to four full or fractional Els into a single carrier with very low overhead This provides significant CAPEX savings by reducing the number of modems and could possibly reduce the
15. rrier DATA INTERFACES EIA 422 530 DCE Up to 14 Mbps V 35 DCE Up to 14 Mbps LVDS Serial Up to 25 Mbps HSSI Serial Up to 25 Mbps G 703 T1 1 544 Mbps Balanced 100 Q G 703 T2 6 312 Mbps 25 pin D sub Female 25 pin D sub Female 9 pin D sub Female Unbalanced 75 Q or balanced 110 Q or G 703 E1 2 048 Mbps BNC Female Unbalanced 75 Q or balanced 120 Q G 703 E2 8 448 Mbps Unbalanced 75 Q ASI Up to 25 Mbps Additional 2 048 Mbps E1 Ports for Quad E1 Balanced 120 Q Overhead Data Modem Alarms 4 nort 10 100Base T Managed Ethernet Switch BNC Female 9 pin D sub Female 44 pin High density D sub Male 15 pin D sub Male 4 x RJ 45 Optional IP Packet Processor Available MODULATOR Frequency Stability Transmit Filtering Transmit Filter R olloff Harmonics and Spurious Transmit On Off Ratio Output Phase Noise Output Power Power Accuracy 0 06 ppm 6 x 10 0 to 50 C 32 to 122 F with Internal Reference Per IESS 308 25 35 Better than 60 dBc 4 kHz typically lt 65 dBc 4kHz Measured from 1 to 500 MHz 50 180 MHz band Measured Fo 500 MHz 950 2000 MHz band 60 dBc minimum lt 0 480 rms double sided 100 Hz to 1 MHz Minimum 16 dB better overall than the Intelsat IESS 308 309 requirements dB Hz Frequency Offset 63 0 100 Hz 73 0 1 kHz 83 0 10 kHz 93 0 100 kHz Fundamental AC line spurious is 42 dBc or lower The sum of all
16. tch with VLAN capability and priority based Quality of Service QoS Access Native Mode and Trunk Mode are supported Traffic can be prioritized using port based priority or VLAN priority The maximum Ethernet frame size is 1536 bytes IP PACKET PROCESSOR The IP Packet Processor enables efficient IP networking and transport over satellite by adding routing capability with very low overhead encapsulation header compression payload compression and Quality of Service to the CDM 625 The advanced QoS combined with header and payload compression ensures the highest quality of service with minimal jitter and latency for real time traffic priority treatment of mission critical applications and maximum bandwidth efficiency Header Compression The IP Packet Processor incorporates industry leading header compression for IP traffic Header compression can reduce the 40 byte IP UDP RTP header to as little as 1 byte For TCP IP the 40 byte header is reduced to as little as 3 bytes For applications such as VoIP header compression can provide bandwidth savings exceeding 60 E g the 8 kbps G 729 voice codec requires 24 kbps of IP bandwidth once encapsulated into an IP UDP RTP datagram With header compression the same voice call needs about 8 5 kbps a saving of almost 65 And bandwidth requirements for typical Web HTTP traffic can be reduced by 10 or more with TCP IP header compression Payload Compression The IP Packet Processor Incorpo
17. unications on the Move e Offshore e Satellite News Gathering KEY FEATURES e DoubleTalk Carrier in Carrier bandwidth compression e Adaptive Coding and Modulation ACM e IP Packet Processor with header compression payload compression and advanced Quality of Service QoS Dual Band Capability 70 140 MHz and L Band in same unit Data Rate 18 kbps to 25 Mbps Symbol Rate 18 ksps to 12 5 Msps Modulation BPSK QPSK OQPSK 8 PSK 8 QAM 16 QAM FEC Viterbi Sequential Concatenated Reed Solomon TCM Turbo Product Code TPC IESS 315 Compliant LDPC Code and VersaFEC low latency LDPC Widest Range of Data Interfaces EIA 422 530 V 35 G 703 T1 6 703 E1 G 703 T2 G 703 E2 Quad G 703 E1 ASI LVDS HSSI 4 port 10 100Base T Ethernet 4 port Managed Ethernet Switch with VLAN and QoS e Sub Mux to multiplex IP Ethernet traffic with serial or G 703 traffic Drop amp Insert for T1 E1 e Enhanced D amp l for Single T1 E1 amp Quad El Management 10 100Base T Ethernet with SNMP Distant End SNMP Proxy HTTP Telnet and EIA 232 E1A 485 Embedded Distant end Monitor and Control EDMAC Automatic Uplink Power Control AUPC Engineering Service Channel ESC ESC Standard High Stability Internal Reference 6 x 10 8 5 tap Adaptive Equalizer L Band TX 10 MHz reference for BUC FSK communications and optional BUC power supply L Band RX 10 MHz reference and LNB power supply Open Network Modes CDM 600 L emulation mode 1 1 an
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