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Comtech EF Data CDM-840 Advanced VSAT Series Remote Router

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  • Integrated router
  • Integrated RAN Optimization
  • ACM and VCM capable
  • 1:1 Redundancy


SKU: SATRES-32734

Transmit
Data Rate 16 kbps to 15.35 Mbps, in 1 bps step (CCM mode) (Modulation and FEC dependent)
Symbol Rate 16 ksps – 4.5 Msps (CCM mode)
FEC VersaFEC Encoder (ACM and CCM modes)
Modulation & Code RateData Rate Range
BPSK 0.488 16.00 kbps – 2.19 Mbps
QPSK 0.533 17.07 kbps – 4.80 Mbps
QPSK 0.631 20.19 kbps – 5.67 Mbps
QPSK 0.706 22.577 kbps – 6.34 Mbps
QPSK 0.803 25.69 kbps – 7.22 Mbps
8-QAM 0.642 30.83 kbps – 8.67 Mbps
8-QAM 0.711 34.14 kbps – 9.60 Mbps
8-QAM 0.780 37.44 kbps – 10.53 Mbps
16-QAM 0.731 46.80 kbps – 13.16 Mbps
16-QAM 0.780 49.92 kbps – 14.04 Mbps
16-QAM 0.829 53.04 kbps – 14.91 Mbps
16-QAM 0.853 54.60 kbps – 15.35 Mbps
Encapsulation Ultra low overhead Streamline Encapsulation
Receive
Receive Data Rate (Pilots Off) QPSK: 1.000 – 110.893 Mbps

8-PSK: 1.779 – 166.110 Mbps

16-APSK: 2.637 – 167.665 Mbps

32-APSK: 3.703 – 168.000 Mbps
Receive Symbol Rate QPSK: 1 to 62 Msps

8-PSK: 1 to 62 Msps

16-APSK: 1 to 47 Msps

32-APSK: 1 to 37 Msps
FEC DVB-S2 Decoder (ACM, CCM and VCM modes) Normal frame
Modulation & FECData Rate Range

(Normal FEC frame, pilots off)
QPSK 1/4 1.000 – 30.395 Mbps
QPSK 1/3 1.000 – 40.699 Mbps
QPSK 2/5 1.000 – 48.943 Mbps
QPSK 1/2 1.000 – 61.309 Mbps
QPSK 3/5 1.188 – 73.674 Mbps
QPSK 2/3 1.322 – 81.979 Mbps
QPSK 3/4 1.487 – 92.223 Mbps
QPSK 4/5 1.587 – 98.406 Mbps
QPSK 5/6 1.654 – 102.589 Mbps
QPSK 8/9 1.766 – 109.519 Mbps
QPSK 9/10 1.788 – 110.893 Mbps
8-PSK 3/5 1.779 – 110.359 Mbps
8-PSK 2/3 1.980 – 122.799 Mbps
8-PSK 3/4 2.228 – 138.143 Mbps
8-PSK 5/6 2.478 – 153.670 Mbps
8-PSK 8/9 2.646 – 164.052 Mbps
8-PSK 9/10 2.679 – 166.110 Mbps
16-APSK 2/3 2.637 – 123.948 Mbps
16-APSK 3/4 2.966 – 139.436 Mbps
16-APSK 4/5 3.165 – 148.784 Mbps
16-APSK 5/6 3.300 – 155.108 Mbps
16-APSK 8/9 3.523 – 165.587 Mbps
16-APSK 9/10 3.567 – 167.665 Mbps
32-APSK 3/4 3.703 – 168.000 Mbps
32-APSK 4/5 3.951 – 168.000 Mbps
32-APSK 5/6 4.119 – 168.000 Mbps
32-APSK 8/9 4.397 – 168.000 Mbps
32-APSK 9/10 4.453 – 168.000 Mbps
Pilots On/off, automatically detected
Encapsulation Low overhead Enhanced GSE
Modulator Specifications
Operating Frequency 950 to 2150 MHz L-Band,

100 Hz frequency resolution
Frequency Stability ± 0.06 ppm (± 6 x 10-8), 0° to 50°C (32° to 122° F)
Frequency Reference Internal
Scrambling Comtech, disabled
Spectral Inversion Normal or inverted
Transmit Filtering Per IESS-308/-309 spectral mask
Transmit Filter Rolloff (Alpha) 20%, 25% and 35%
Output Power 0 to -40 dBm, in 0.1 dB steps
Power Accuracy ± 1.0 dB over frequency, data rate, modulation type and temperature range of 0 to 50° C
Transmit On/Off Ratio -60 dBc minimum
Harmonics and Spurious Better than -60 dBc/4 kHz

(typically < -65 dBc/4KHz)

Measured from Fo +/- 300 MHz
Output Phase Noise

    @ 100 Hz

    @ 1 kHz

    @ 10 kHz

    @ 100 kHz



-66.0 dB/Hz

-76.0 dB/Hz

-86.0 dB/Hz

-96.0 dB/Hz
< 1º rms double sided, 100 Hz to 1MHz (minimum of 6 dB better overall than the Intelsat IESS-308/309 requirement)
Fundamental AC line spurious is -42 dBc or lower The sum of all other single sideband spurious, from 0 to 0.75 x symbol rate, is -48 dBc or lower
Connector Type N (female)
Impedance 50 Ω
Return Loss 20 dB, minimum
External TX Carrier Off By TTL ‘low’ signal
Test Modes CW, 1/0 pattern, 2^23-1 and 2047 patterns
BUC Reference (10 MHz) Via TX IF center conductor, 10.0 MHz ± 0.06 ppm, selectable on/off, 0.0 dBm  3 dB
BUC Power Supply (HW Option) 24 VDC, 4.17 Amps max., 90 W @ 50° C

48 VDC, 3.125 Amps max., 150 W @ 50° C

Supplied through TX IF center conductor and selectable on/off via M&C control
Demodulator Specifications
Operating Frequency 950 to 2150 MHz L-Band, 100 Hz frequency resolution
Connector Type N (female)
Impedance 50 Ω
Input Power Range, Desired Carrier -65 dBm + 10 log (symbol rate in MHz) to -25 dBm
Maximum Composite Operating Level -5 dBm total composite power

20 dBc within 10 MHz band from the desired carrier for QPSK, 8-PSK, and 16-APSK

10 dBc within 10 MHz band from the desired carrier for 32-APSK

30 dBc outside of 10 MHz from carrier
Absolute Maximum, No Damage -10 dBm
Rolloff 20%, 25%, 35%
Acquisition Range +/- 100 kHz
Adaptive Equalizer Corrects up to 3 dB tilt
Return Loss 12 dB, minimum (typical 15 dB)
LNB Reference (10 MHz) Via RX IF center conductor, 10.0 MHz ± 0.06 ppm

Selectable on/off, -3.0 dBm ± 3 dB
LNB Voltage Selectable on/off, 13 VDC, 18 VDC, 24 VDC
LNB Current 500 mA, maximum
Monitor Functions Es/No estimate, receive signal level, frequency offset
Es/No Monitor Accuracy +/- 0.3 dB
Receiver Signal Level Monitor Accuracy +/- 6 dB (typical)
Packet Processor
Supported Protocols
RFC 768 – UDP

RFC 791 – IP

RFC 792 – ICMP

RFC 793 – TCP

RFC 826 – ARP

RFC 856 – Telnet

RFC 862 – Ping

RFC 894 – IP

RFC 959 – FTP

RFC 1112 – IP Multicast

RFC 1213 – SNMP MIB II
RFC 1812 – IPv4 Routers

RFC 2045 – MIME

RFC 2474 – Diffserv

RFC 2475 – Diffserv

RFC 2578 – SMI

RFC 2597 – AF PHB

RFC 2598 – Expedite Forwarding

RFC 2616 – HTTP

RFC 3412 – SNMP

RFC 3416 – SNMPv2

RFC 3418 – SNMP MIB
Statistics Detailed packet and throughput stats
Connectors
L-Band Transmit and Receive 2 x N-type (female)
10/100Base-T Ethernet interface (IEEE 802.3u) RJ-45
10/100/1000Base-T Ethernet interface (IEEE 802.3ab) RJ-45
G.703 E1, 2.048 Mbps (Unbalanced 75 Ω) BNC (female)
Remote Control 9-pin D-sub (male)
Redundancy Interface

TX, RX traffic alarms and unit faults
9-pin D-sub (female)
Available Options
OptionType
-48 VDC, Primary Power Supply Hardware
24 VDC, 90 W @ 50° C BUC Power Supply Hardware
48 VDC, 150 W @ 50° C BUC Power Supply Hardware
Transmit Data Rate FAST
Receive Data Rate FAST
Lossless Payload Compression /

Decompression
FAST
Header Compression/Decompression FAST
Advanced Quality of Service FAST
E1 RAN Optimization FAST
G.703 Clock Extension FAST
Physical, Power & Environmental
Dimensions (1RU) (H x W x D) 1.75” x 19.0” x 16.1”

(4.4 x 48 x 40.8 cm) approximate
Power Supply 100-240 VAC, 47Hz-63Hz IEC 320 input

-48 VDC (HW option)
Operating Temperature 0° to 50°C
Storage temperature –20° to 70°C
Humidity 95% maximum, non-condensing
Accessories
CRS-170A 1:1 Modem Redundancy Switch
Regulatory
CE Mark EN55022 Class B (Emissions)

EN50082-1 Part 1 (Immunity)

EN60950 (Safety)
FCC Approval FCC Part 15 Class B

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