Comtech EF Data CDM-600L, Инструкция по установке и эксплуатации

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CDM-600L Satellite Modem Revision 0
Introduction MN/CDM600L.IOM
1–3
1.1.3 Verification
The unit includes many test modes and loopbacks for rapid verification of the correct
functioning of the unit. Of particular note is the IF loopback, which permits the user to
perform a quick diagnostic test without having to disturb external cabling. During the
loopback, all of the receive configuration parameters are temporarily changed to match
those of 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.
1.1.4 Data Interfaces
The CDM-600L includes, as standard, a universal data interface that eliminates the need
to exchange interface cards for different applications. The interfaces offered include:
•
RS-422 (RS-530) DCE (at rates up to 10 Mbps)
•
X.21 DTE and DCE (at rates up to 10 Mbps)
•
V.35 DCE (at rates up to 10 Mbps)
•
Synchronous RS-232 DCE (at rates up to 300 kbps)
•
G.703 E1, balanced and unbalanced
•
G.703 T1, balanced
•
G.703 E2, balanced and unbalanced
•
G.703 T2, balanced
•
Serial LVDS (at rates up to 20 Mbps)
•
Dual Audio, 600
Ω
(produces a single 64 kbps IBS data stream)
1.2 Major Assemblies
Assembly Description
PL/9662-1
0.02 PPM Reference Modem Card – 75
Ω
receive Type F
PL/9662-2
1 PPM Reference Modem Card – 75
Ω
receive Type F
PL/9662-3
0.02 PPM Reference Modem Card – 50
Ω
receive Type N
PL/9662-4
1 PPM Reference Modem Card – 50
Ω
receive Type N
AS/0463 Turbo Codec – low rate
AS/9436 Turbo Codec – high rate
PL/9076-1 Baseband Framing Card
PL/9640-1 Chassis