Comtech CDMER-625A Advanced Satellite Modem

CDMER-625A Environmentally Resistant Advanced Satellite Modem

The Comtech CDMER-625A is a highly Environmentally Resistant (ER) satellite modem that  offers extensive added protection for aggressive operating environments that have a higher concentration of dust, sand and salt. The ER version uses an application of Urethane Conformal Coating (CC) and critical interface protective covers for enhanced protection against dust, sand and salt. Special protective Conformal Coating and protective covers have been designed to ensure that the CDMER-625A meets MIL-STD-810G requirements including Method 510 Procedure I (Blowing Dust), Method 510 Procedure II (Blowing Sand) and Method 509 (Salt Fog). Both the CC and protective connector covers are non-nutrient fungal growth materials. The ER version also provides an extended operating temperature range of 0 to 60º C. The ER version is not designed to be used in an un-controlled environment or outdoor application. The ER version carries the same two year standard warranty as other Comtech EF Data products

With support for the revolutionary DoubleTalk Carrier-in-Carrier bandwidth compression, VersaFEC Forward Error Correction (FEC), additional rolloffs and advanced packet processing, the CDMER-625A provides exceptionally reliable spectral purity and satellite space segment cost reductions under all conditions. These combinations of advanced technologies enable multi-dimensional optimization, allowing satellite communications users to: 

 Minimize operating expenses (OPEX)

 Maximize throughput without using additional transponder resources

 Maximize availability (margin) without using additional transponder resources

 Minimize capital expenses (CAPEX) by allowing a smaller BUC/amplifier and/or antenna

 Or, a combination to meet specific business needs

The modems are available with 70/140 MHz or L-Band IF and EIA-530/-422, V.35, sync EIA-232 and G.703 T1/E1 data interfaces. The CDMER-625A includes a high-performance packet processor for IP-centric applications.

Key Features

 Environmentally Resistant (ER)

 DoubleTalk Carrier-in-Carrier bandwidth compression

 Carrier-in-Carrier Automatic Power Control

 VersaFEC-2 High Performance LDPC with Adaptive Coding and Modulation (ACM), Short Block and Long Block

 VersaFEC FEC with Adaptive Coding and Modulation (ACM)

 5%, 10%, 15%, 20%, 25% and 35% Filter Rolloff

 Packet Processor with header compression, payload compression, advanced Quality of Service (QoS) and Managed Switch Mode with VLAN support

 Integrated 4-port managed Ethernet switch with VLAN and QoS

 Jumbo frame support

 Dual Band Capability: 70/140 MHz and extended L-Band (950 – 2250 MHz) in same unit 

 Data Rate: 18 kbps to 25 Mbps

 Symbol Rate: 18 ksps to 12.5 Msps

 Modulation: BPSK, QPSK/OQPSK, 8PSK/8-QAM/8-ARY, 16-QAM/16-ARY, 32-ARY

 FEC: Viterbi, Sequential, Concatenated Reed Solomon, TCM, Turbo Product Code (TPC) (IESS-315 Compliant), LDPC Code, VersaFEC (low-latency LDPC) and VersaFEC2 (high performance LDPC)

Doubletalk Carrier-in-Carrier