Comtech EF Data CDM-425, Инструкция по установке и эксплуатации

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CDM-425 Advanced Satellite Modem
Revision 0
Appendix F F–28 MN-CDM-425
On the top line, use the
▲▼ arrow keys to select the appropriate CnC operating mode.
Available selections are:
• Off • On (normal) • APC,Side ‘A’,
C-
Band
•
APC,Side ‘A’,X-Band
•
APC,Side ‘A’,Ku-Band
•
APC,Side ‘A’,Ka-Band
•
APC,Side ‘B’,
C-
Band
•
APC,Side ‘B’,X-Band
•
APC,Side ‘B’,Ku-Band
• APC,Side ‘B’,Ka-Band
If it is not known which satellite band is being used, no attempt
should be made to engage CnC-APC.
Once the mode has been selected, press ENTER – do not select Activate (on the bottom
line) yet.
Note the following:
•
If Side ‘A’ is selected at both sides, or Side ‘B’ is selected at both sides, both
modems will display a Frame Sync fault (under Rx faults). No further action is
possible until this error has been corrected.
•
If different satellite bands are selected on each side (for instance, Side ‘A’ is Ku-
Band, while Side ‘B’ is C-Band) the modem will display an
APC Band Mismatch
fault (under Rx faults). No further action is possible until this error has been
corrected.
4. Based on the known RF terminal equipment in use, determine a value for the maximum
allowed power increase (TPLI
max
) and then set this value. From the front panel, select the
CONFIG

Tx

Power menu:
Output Power Mode = Cn C- Auto-Power-Control
Level = -25.0dBm MaxPwrIncrease=2.5dB (

)
Use the bottom line to edit the power output level and the maximum permitted increase in
power level when in APC Mode:
Use the
◄ ►
arrow keys to select a digit to edit, and then use the
▲▼ arrow keys to
change the value of that digit. Press ENTER .
Note that when APC is in an active state, the value of the power level displayed in the
bottom left will show
‘AUTO’.