Comtech EF Data CDM-600/600L - Manual (Page 85)

CDM-600/600L Open Network Satellite Modem Revision 3
Front Panel Operation MN/CDM600L.IOM
5–9
If the cursor is on the second parameter – the Framing Type – the display appears as shown:
Mode: Tx=RS422:NONE Rx=RS422:None
(None IBS IDR EDMAC D&I++ ESC++)
The Framing Tx and Rx options are as follows:
► NONE
► IBS (FAST option)
► IDR (FAST option)
► DROP (FAST Options
► EDMAC
► D&I++ (FAST Option):
CDM-600L – FW Ver. 1.20 and greater
CDM-600 – FW Ver. 1.5.0 and greater
► ESC++ (FAST Option):
CDM-600L – FW Ver. 1.3.0 and greater
CDM-600 – FW Ver. 2.0.1 and greater
Scroll through the available options using the [ ↑][↓] arrow keys, then press [ENT] once the
desired selection is made.
5.4.3 CONFIG: TX
Tx-IF: POWER ENCODER MOD DATA SCRAMBLER
(DATA=00064.000kbps SYMBOL=00064.000ksym
Select the parameter on the top line – the submenu branches available are TX-IF, FREQ,
POWER, EMCODER, MOD, DATA, and SCRAMBLERr – using the [
←][→] arrow keys,
then press [ENT]. The bottom line provides read-only Data/Symbol rate information.
5.4.3.1 CONFIG: Tx Æ TX-IF
TX-IF: CARRIER = ON (OFF,ON,RTI)
TX FREQ=12000.0000MHz SPECTRUM INVERT=OFF
Select the parameter to edit – Carrier, TX FREQ or SPECTRUM INVERT – using the
[
←][→] arrow keys.
To edit the Carrier, select OFF, ON, or RTI using the [ ↑][↓] arrow keys. Press [ENT] when done.
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.