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CDM-600 Satellite Modem Revision 7
Front Panel Operation MN/CDM600.IOM
6–9
Select each digit of the TX frequency to be edited using the [←] [→] arrow keys. Edit the
value of the digit using the [↑] [↓] arrow keys. When editing is complete, press ENTER.
Note that the range is from 52 to 88 MHz, and 104 to 176 MHz. The resolution is 100Hz.
For units manufacured after February 2005, and which display CDM-600(E) on the
opening menu, the range of IF frequencies has been extended to 50 - 90 MHz, and 100 -
180 MHz.
IMPORTANT
SPECTRUM INVERT should normally be in the OFF position. When in
the ON position, for all FEC types, except BPSK, the transmit spectrum
is inverted (which is the same as reversing the direction of phase rotation
in the modulator). In BPSK, the time-order of bits out of the FEC
encoder is reversed, to make the modem compatible with certain other
manufacturer’s modems.
CONFIG: TX: POWER
Select the parameter to edit using the [←] [→] arrow keys. Edit the output level mode,
either MANUAL or AUPC, using the [↑] [↓] arrow keys. Select each digit of the TX
Power Level using the [←] [→] arrow keys. Edit the value of the digit using the [↑] [↓]
arrow keys. When editing is complete, press ENTER.
If AUPC mode is selected, the lower line changes:
(Note that EDMAC, or D&I++, or ESC++ framing must be enabled for AUPC to
function.)
Use the [←] [→] arrow keys to select either TARGET-EbNo/RANGE or ALARM
ACTION, then press ENTER
If TARGET-EbNo/RANGE is selected, the following menu will be displayed:
Edit the target Eb/No of the remote modem. The default value is 3.0 dB, and upper limit
is 9.9 dB. Edit the maximum permitted increase in power level when in AUPC mode.
The default value is 1dB, and upper limit is 9 dB. The user should then press ENTER.
OUTPUT POWER: MODE = MANUAL (MANUAL,AUPC)
OUTPUT POWER LEVEL = –20.0 dBm
OUTPUT POWER: MODE = AUPC (MANUAL,AUPC)
TARGET-EbNo/RANGE ALARM/ACTIO
N
MINIMUM EbNo OF REMOTE MODEM = 5.0dB
MAXIMUM PERMITTED POWER INCREASE = 9dB