Comtech EF Data CDM-QX Multi-Channel Carrier-in-Carrier Satellite Modem
Data rates up to 20 Mbps, Carrier-In-Carrier
CDM-QX Multi-Channel Carrier-in-Carrier Satellite Modem
The Comtech CDM-QX Multi-Channel Carrier-in-Carrier Satellite Modem offers cutting edge DoubleTalk Carrier-in-Carrier bandwidth compression capability that allows transmit and receive carriers of a full-duplex satellite link to share the same transponder space.
DoubleTalk Carrier-in-Carrier enables multi-dimensional optimization, thereby allowing satellite communications users to:
Reduce operating expenses (OPEX)
Increase throughput without using additional transponder resources
Increase availability (margin) without using additional transponder resources
Reduce capital expenses (CAPEX) by allowing a smaller BUC/HPA and/or antenna
Or, a combination to meet specific user needs
The Comtech CDM-QX Multi-Channel Carrier-in-Carrier Satellite Modem is available in both 70/140 Mhz IF: Comtech CDM-QX and L-Band: Comtech CDM-QXL
Data Rate (See Summary Table) |
32 kbps to 20 Mbps, in 1 bps steps (data interface dependant) |
Symbol Rate |
Up to 10 Msps |
Scrambling |
V.35, or synchronous |
FEC (See Summary Table) |
Viterbi 1/2, 3/4 and 7/8 Concatenated Reed-Solomon 1/2, 2/3, 3/4, and 7/8 |
Turbo Product Coding (TPC) -2nd Generation |
Hardware option BPSK Rate 5/16 and 21/44 QPSK Rate 21/44, 3/4, 7/8, and 17/18 8PSK Rate 3/4, 7/8, and 17/18 16-QAM Rate 3/4 and 7/8 |
M&C Interface |
EIA-232, EIA-485 (2- or 4-wire), 10/100 Base-T Ethernet with SNMP, HTTP and Telnet support |
Form C Relays |
TX, RX traffic alarms and unit faults |
External Reference |
1, 2, 5, 10 or 20 MHz, BNC connector |
IF Impedance & Connectors |
CDM-Qx: 75 0 (Optional 50 0), BNC female CDM-QxL: 50 0, Type-N female |
Monitor Functions |
Eb/N0, Frequency Offset, BER, buffer fill status, RX signal level, carrier power ratio |
Enterprise, Broadband Interactive Services, Disaster Recovery & Emergency Communications, G.703 Trunking, High Speed Content Delivery