Comtech EF Data Vipersat SLM-5650A, Инструкция по установке и эксплуатации

Страница: 124 / 516

SLM-5650A Satellite Modem
Revision 10
Front Panel Operation 7–18 MN-SLM-5650A
(CONFIG:) Rx

Frequency
Rx Frequency: 1955.0000 MHz
Spectrum: Normal (

E)
Use the

arrow keys to select Rx Frequency or Spectrum . Press [ENT] . Use Method 1 or
Method 2 to enter the desired Rx Frequency:
Method Procedure
1 Use the number keypad and enter the desired frequency. Press [ENT].
2
Use the

arrow keys to select a digit to edit, and then use the

arrow keys to change that
digit. Press [ENT].
For 70/140 MHz – the valid range is 52-88 or 104-176 MHz (in 100 Hz steps).
For L-Band – the valid range is 950-2000 MHz (in 100 Hz steps).
When entering an IF frequency, the M&C will check the occupied bandwidth calculated from
the data rate, modulation type, code rate and overhead, and will not allow an IF frequency to
be entered if the occupied bandwidth falls outside of the minimum or maximum IF
frequencies.
Select
Spectrum to counteract frequency converters that invert the spectrum. Use the

arrow
keys to select Normal or Invert . Press [ENT].
(CONFIG:) Rx

Acquisition
Acquisition: Range: 0001.000 KHz
Reacq: 000 Seconds (

E)
Use the

arrow keys to select Range or Reacq . Press [ENT] .
Option Settings
Range Demodulator Acquisition range:
0-60 kHz (in 1 Hz steps).
Reacq Holdoff time before the demodulator reverts to normal acquisition:
0 to 999 seconds.
During the holdoff, the demodulator will stay centered on the last known frequency position of the carrier
for faster reacquisition.
Use Method 1 or Method 2 to configure these options:
Method Procedure
1 Key in the desired frequency using the numbered keypad. Press [ENT].
2 Use the

arrow keys to select a digit to edit, and then use the

arrow keys to
change that digit. Press [ENT].