Mocomtech CDM-570 - Manual (Page 101)

CDM-570/570L Satellite Modem with Optional IP Module Revision 4
Introduction MN/CDM570L.IOM
1–3
1.1.4 Verification
The unit includes many test modes and loopbacks for rapid verification of the correct
function of the unit. In particular, the IF loopback permits the user to perform a quick
diagnostic test without disturbing external cabling. During the loopback, all the receive
configuration parameters are temporarily changed to match the transmit side, 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.
1.1.5 Data Interfaces
The CDM-570/570L includes, as standard, a universal data interface that eliminates the
need to exchange interface cards for different applications. The interfaces offered
include:
• EIA-422 (EIA530) DCE (at rates up to 9.98 Mbps)
• X.21 DTE and DCE (at rates up to 9.98 Mbps)
• V.35 DCE (at rates up to 9.98 Mbps)
• Synchronous EIA-232 DCE (at rates up to 300 kbps)
• G.703 E1 (2048 kbps), balanced and unbalanced
• G.703 T1 (1544 kbps), balanced
• Optional – integrated 10/100 BaseT Ethernet interface
1.2 Major Assemblies
Assembly Description
AS/10901 Modem Card - CDM-570
AS/9979 Modem Card - CDM-570L
AS/10554 Turbo Codec
AS/10551 Reed-Solomon Codec
PL/10047-1 Chassis
PL/10235
IP Module 10/100 BaseT Ethernet Interface (optional)
1.3 FAST Options and Hardware Options
The CDM-570/570L is extremely flexible and powerful, and incorporates a large number
of optional features. 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 user wishes to upgrade the
functionality of a modem, Comtech EF Data provides FAST (Fully Accessible System
Topology) which permits the purchase and installation of options through special
authorization codes, entered remotely, or through the front panel.
The base unit is configured with a Viterbi codec. It offers BPSK, QPSK, and OQPSK
modulation types, and data rates up to 512 kbps, with all interface types except G.703.
EDMAC and AUPC operation are included.