Software - Flash Upgrading; Verification; Data Interfaces; Turbo Product Coding - Comtech EF Data CDM-Qx Installation And Operation Manual

CDM-Qx Satellite Modem
Introduction
1.2.2 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, e-mail, or on
disk. The upgrade can be performed without opening the unit by simply connecting the
modem to the USB port or Ethernet port of a computer.
1.2.3

Verification

The Modem includes many test modes and loopbacks for rapid verification of the correct
functioning of the unit. Of particular interest is the IF loopback (grouped as modem),
which permits the user to perform a quick diagnostic test without having to disturb
external cabling. During loopback, all of the receive configuration parameters on the
selected Demodulator are temporarily changed to match those of the selected Modulator,
and an internal RF switch connects the modulator output to the demodulator input. When
normal operation is again selected, all of the previous values are restored.
1.2.4

Data Interfaces

The Modem can be ordered with a number of interfaces. Each data interface can operate
on a Modulator or Demodulator. This allows the user to exchange interface cards for
different applications. The interfaces offered include:
•
•
•
•
•
1.2.5

Turbo Product Coding

The Modem offers optional 2nd generation Turbo Product Codec (TPC). TPC
simultaneously offers increased coding gain, lower decoding delay, and significant
bandwidth savings. The TPC provides:
•
•
•
•
EIA/TIA-530
o (EIA-422) DCE (at rates up to 12 Mbps)
o V.35 DCE (at rates up to 12 Mbps)
G.703 Balanced T1 & E1 (DB-15) with D&I++
G.703 Unbalanced T1 & E1 (BNC)
EIA/TIA-612/613 HSSI (50-pin SCSI connector, to 20 Mbps)
1 to 4 Ports of G.703 (E1 with D&I ) Quad E1 Interface Card, (RJ-45)
BPSK 5/16 and 21/44
QPSK 21/44, 3/4, 7/8 and 17/18
8-PSK 3/4, 7/8, and 17/18
16-QAM 3/4 and 7/8
1–3
Revision 6
MN/CDMQx.IOM