Comtech EF Data KST-2000A/B - Manual (Page 51)

Ku-Band Satellite Transceiver Revision 9
Operation MN/KST2000AB.IOM
3–3
3.1.1 Uplink Setup
Step Procedure Troubleshooting
1 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. 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.
2 Set the up converter to the desired RF
TX frequency using the appropriate
commands from the KP10 terminal, or
Windows
™ M&C.
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.
3 Before proceeding, ensure that the
HPA is properly terminated. If a directional coupler and termina-
tion is used or an attenuator is used,
note the value.
4 Enable external faults, execute the
appropriate HPA Power and Heater
commands See Appendix B.4 HPA commands.
5 Turn the RF output of the up converter
ON. 1. See Appendix B.3 system con-
figuration commands.
2. There should be no up converter
faults at this time.
6 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. 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.
7 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. See Appendix B.3.
8 Turn the RF output of the up converter
off. See Appendix B.3.