The Comtech CDM-700 is a high-speed satellite modem intended for operation with a range of multi-port data interfaces. The modem operates in broadcast, circuit restoration, point-to-point and point-to-multipoint applications with exceptional power and bandwidth efficiency.
Compact: 1RU, Chassis
(Optional) 70/140 MHz or L-Band
Combines multiple data streams into a single carrier
Data rate range: 1.5 to 155.52 Mbps within 1 to 64 Msps
QPSK, 8-PSK, 16-QAM, 64-QAM
Turbo Product Coding (TPC)
Two data interface slots
Data interfaces include:
CDI-10: Dual G.703 Interface
CDI-50: OC-3 Interface
CDI-60: HSSI Interface
CDI-70: 1000BaseT (GbE) Ethernet Interface
Unit Management/M&C, Standard Features
Front Panel Keypad and vacuum florescent display
Ethernet 10/100 BaseT for reflashing
RS-232 or RS-485
Asymmetric Data Rates
Standard 1.5 ppm internal reference
Enhancing the CDM-700's performance is easy. Additional features are added quickly on site, using FAST access codes purchased from Comtech EF Data. To enable these features, simply enter the code at the front panel. Other features are added with a simple module swap.
The CDM-700 provides bandwidth efficient transport of broadband data for satellite links. The powerful Ethernet M&C interface for the modem easily manages point-to-point, earth station and networking environments.
Turbo Products Coding (TPC)
The CDM-700 offers Turbo Product Coding. TPC simultaneously offers increased coding gain, lower decoding delay and significant bandwidth savings compared to Viterbi and Reed-Solomon (RS). The TPC rates are:
Rate 3/4 for QPSK, 8-PSK, 16-QAM, 64-QAM
Rate 7/8 for QPSK, 8-PSK, 16-QAM, 64-QAM
The operator may configure and monitor the modem from the front panel, or through the remote M&C port. Control and status is provided through the RS-232, RS-485 (2/4 wire) port or 10/100 BaseT Ethernet port.
Software - Flash Upgrading
The internal software is both powerful and flexible, permitting storage and retrieval of up to 10 different modem configurations. The modem uses 'flash memory' technology internally, and new firmware can be uploaded to the unit from an external PC. This simplifies software upgrading, and updates can now be sent via the Internet or e-mail. The upgrade can be performed without opening the unit by simply connecting the modem to the Ethernet port of a computer.
Fully Accessible System Topology (FAST)
The CDM-700 is extremely flexible and powerful, and incorporates a large number of optional features. Some customers may not require all of these features, and therefore, in order to permit a lower initial cost, the modem may be purchased with only the desired features enabled. If, at a later date, a customer wishes to upgrade the functionality of a modem, CEFD provides a system known as FAST which permits the purchase and installation of options through the use of special authorization codes, entered through the front panel, or remotely.