CDM-600 Satellite Modem

Revision 7

Front Panel Operation

MN/CDM600.IOM

The second option is the Framing type.

The TX options are:

NONE

IBS (FAST option)

IDR (FAST option)

DROP (FAST option)

EDMAC

D&I++ (FAST option) (Ver 1.5.0 or greater) ESC++ (Ver 2.0.1 or greater)

The RX options are:

NONE

IBS (FAST option)

IDR (FAST option)

INSERT (FAST option)

EDMAC

D&I++ (FAST option) (Ver 1.5.0 or greater) ESC++ (Ver 2.0.1 or greater)

6.3.1.3CONFIG: TX

TX-IF: POWER ENCODER MOD DATA SCRAMBLER

DATA=20000.000kbps SYMBOL=10000.000ksym

Select the parameters on the top line to be edited using the [←] [→] arrow keys. Observe the Data/Symbol rates on the bottom line. Press ENTER

CONFIG: TX: TX-IF

TX-IF: CARRIER = ON (ON,OFF,RTI)

TX FREQ=176.0000MHz SPECTRUM

Three TX settings can be set from this menu. Select the parameter to edit using the [←] [→] arrow keys. The options for the TX carrier are shown in parentheses. To change the settings use the [↑] [↓] arrow keys. Select either ON, OFF, or RTI, then press ENTER.

IMPORTANT

RTI means RECEIVE/TRANSMIT INHIBIT. When selected, it will prevent the TX carrier from being transmitted, until the demodulator is locked. To avoid the Tx Carrier from being turned off when the demodulator loses lock for a very short period of time, the demodulator must be unlocked continuously for a period of 10 seconds before the transmit carrier is inhibited. This time interval is fixed and the user cannot change it.

Having this feature enabled does not affect the internal IF loopback feature. But, be aware that if an external IF loopback is attempted (connecting an external cable from the Tx IF output to the Rx IF input), then this will not work! (The Tx carrier cannot turn on until the demod is locked, and the demod cannot lock, because the TX output is off. The net result is that the demod will not lock, and the Tx carrier will not turn on. USE THE RTI FEATURE WITH EXTREME CARE!

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Premier Mounts CDM-600 Config TX TX-IF, TX-IF Power Encoder MOD Data Scrambler, TX-IF Carrier = on ON,OFF,RTI