An external AFC can be used instead of RVP900 AFC, but it is not recommended.
Background: Klystron or TWT-based Systems
The COHO is measured instead of the burst pulse.
Klystron systems that use a phase shifter should input the phase shifted COHO into the
IFD, so that RVP900 can digitally lock to the transmitted phase.
For Klystron systems, the AFC feedback loop is unused.
Test Equipment
KVM connected
Test Procedure
1. Enter the TTY setups through dspx.
2. Issue the Mb command, once for each pulse width.
3. Set all the values as required.
Checklist
Table 97 Burst Pulse and AFC Set Up Checklist
Task Checked OK/Not OK Remarks
Parameters are set.
See 5.2.1 Mb — Burst Pulse and AFC (page 93)
Test Passed
For Customer Date:
For Vaisala Date:
A.13 Checking Debug Options with the M+
Command
Test Goal
Verify that the TTY setups for the Board Configuration section are properly configured for
the customer application.
Appendix A – Installation and Test Procedures
351
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