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CDM-600L Satellite Modem
Installation
2.3
Configuration
There are no internal jumpers to configure, no interface cards to install, and no other
options to install. All configuration is carried out entirely in software. The unit should
first be configured locally, using the front panel keypad and display. The unit will ship
with a default 64 kbps, QPSK, Rate 1/2 configuration. Refer to the 'FRONT PANEL
OPERATION' chapter for details on how to fully configure the unit for the desired
operating parameters.
Note: The auto-sensing AC power supply does not require any adjustments. Simply plug
in the supplied line cord, and turn on the switch on the rear panel.
2.4
Select Internal IF Loop
Correct operation of the unit may be verified rapidly, without the need for externally
connected equipment. From the top level menu, select TEST, then IF LOOP (refer to
the 'FRONT PANEL OPERATION' chapter). The demod should synchronize, and the
green RECEIVE TRAFFIC LED should illuminate. If the unit does not pass this test,
call the factory for assistance.
2.5
Connect External Cables
Having verified correct operation in IF loop, enter the desired configuration, and proceed
to connect all external cables. If difficulties occur, please call the factory for assistance.
Note: The modulator gives an output power level in the range 0 to -40 dBm, and the
demodulator expects to see a signal in the range –130 + 10log(symbol rate) dBm to -130
+ 10log(symbol rate) +50 dBm.
CAUTION
The CDM-600L includes an internal programmable 13, 18, or 24V
LNB power supply at the receive IF connector, and optionally
includes a 24 or 48V BUC power supply at the transmit IF connector.
These power supply outputs are user configurable from the front
panel or remote control for ON/OFF state. Use appropriate DC
blocks for external test equipment or other devices subject to damage
by high DC voltage, or alternatively, assure that these power supply
outputs are turned OFF before connecting DC sensitive external
devices.
2–4
Revision 2
MN/CDM600L.IOM
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