Comtech EF Data CDM-625, Инструкция по установке и эксплуатации

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CDM-625 Advanced Satellite Modem Revision 1
Front Panel Operation MN-0000036 (Ref MN/CDM625.IOM)
5.4.3.2 CONFIG: Tx
Æ
Freq (Frequency)
Tx-IF Frequency: 0050.0000 MHz
(
34v
)
Select each digit of the frequency to be edited using the
◄ ►
arrow keys. Edit the value of the digit
using the
▲ ▼
arrow keys, then press
ENTER
when done. The available frequency ranges are:
•
50 - 180 MHz, and
•
950 - 1950 MHz (L-band) - FAST Option.
The resolution is 100Hz.
If an LO-frequency has been configured, via the ODU menus, this menu shows a second line, e.g.:
Tx-IF Frequency: 1750.0000 MHz
(LO:12500 MHz Sat:14250.0000 MHz) (
34v
)
As the IF frequency is edited, the Satellite frequency updates accordingly.
Satellite Frequency = LO +/- IF frequency, where the sign +/- is determined by the LO mix
parameter.
5.4.3.3 CONFIG: Tx
Æ
Power
Output Power: Mode= Manual (Manual,AUPC)
Level= –20.0 dBm (
34v
)
Select the parameter to edit using the ◄ ► arrow keys. Edit the output level mode –
MANUAL
or
AUPC –
using the
▲ ▼
arrow keys. Move the cursor to a 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
.
For Tx frequencies of 50 - 180 MHz, the permitted level range is 0 to –25dBm.
For 950 - 1950 MHz (L-band), the range is 0 to –45dBm.
If the Tx framing is
EDMAC
, or
D&I++,
or
ESC++
or
D&I
, the power mode of
AUPC
may be
selected. See
Chapter 8. AUTOMATIC UPLINK POWER CONTROL
for more information
about the AUPC feature. The lower line indicates:
Output Power: Mode= AUPC (Manual,AUPC)
Target-EbNo-Range Alarm-Action (
34v
)
Use the
◄ ►
arrow keys to select either
Target-EbNo-Range
or
Alarm-Action
, then press
ENTER
.
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