Uplink Setup - Comtech EF Data KST-2000B Installation And Operation Manual

Ku-Band Satellite Transceiver
Operation
3.1.1

Uplink Setup

Step
1
2
3
4
5
6
7
8
Procedure
Apply a 70 MHz (140 MHz) signal at a
known level between –25 and –45
dBm to the IF IN (J3) connector of the
KST-2000A/B.
Set the up converter to the desired RF
TX frequency using the appropriate
commands from the KP10 terminal, or
Windows™ M&C.
Before proceeding, ensure that the
HPA is properly terminated.
Enable external faults, execute the
appropriate HPA Power and Heater
commands
Turn the RF output of the up converter
ON.
Using an appropriate frequency meas-
uring device, ensure that the output of
the HPA (measured through the cou-
pler or attenuator) is at the correct fre-
quency.
Using an appropriate RF power meas-
uring device, set the up converter at-
tenuation until the power measured at
the output of the coupler or attenuator
is at the correct value.
Turn the RF output of the up converter
off.
The AGC function is selected as ON.
The AGC will not function below a
– 45 dBm input level.
1. If the AGC function is selected as
OFF, lower input levels can be
used limited only by noise.
2. See Section 3.12 for more infor-
mation on the AGC function.
1. See the up converter frequency
select command (Appendix B.3).
2. If an error message is received,
see Appendix B.2.3 to determine
the cause.
If a directional coupler and termina-
tion is used or an attenuator is used,
note the value.
See Appendix B.4 HPA commands.
1. See Appendix B.3 system con-
figuration commands.
2. There should be no up converter
faults at this time.
1. If an external 5 or 10 MHz source
is used, the internal reference
will automatically frequency-lock
to it.
2. Ensure that there are no reported
reference faults using the com-
mands in Appendix B.9, Refer-
ence Current Faults.
3. If the internal, high-stability oscil-
lator is used, its frequency can
be fine tuned using the reference
frequency adjust command.
4. See Appendix B.3. Allow at least
30 minutes warm-up before ad-
justing the oscillator.
See Appendix B.3.
See Appendix B.3.
3–3
Revision 9
MN/KST2000AB.IOM
Troubleshooting