Vaisala RVP900 - Checking Burst Pulse and AFC with Setup Mb Command; Table 96 Pulse Width Information Checklist

# Pulse Width Max PRF
3 ____ μsec ____ Hz
Test Procedure
1. Enter the TTY setups through dspx.
2. Issue the Mt # command, once for each pulse width.
3. Enter the start time and widths for each trigger as shown in 5.2.6 Mt<n> — Triggers for
Pulsewidth n (page 116).
4. For all unused triggers, set the width to 0.
5. Enter the Maximum PRF from the chart above.
6. Set the initial impulse response length to 1.5 times the pulse width, and the initial pass
bandwidth to the inverse of the pulse width.
Checklist
Table 96 Pulse Width Information Checklist
Task Checked OK/Not OK Remarks
Parameters are set.
See 5.2.6 Mt<n> — Triggers for Pulsewidth n (page 116)
Test Passed
For Customer Date:
For Vaisala Date:
A.12 Checking Burst Pulse and AFC with
Setup Mb Command
Test Goal
Verify that the TTY setups for the Burst Pulse and AFC
Configuration section are properly
configured for the customer application.
Background: Magnetron Systems
For magnetron systems, the phase and frequency of the burst pulse from the transmitter is
measured at IF.
The phase measurement is used for digital phase locking and second trip echo
filtering and
recovery.
The frequency measurement is used to implement an analog (±10V) AFC output to control
the STALO frequency.
RVP900 User Guide M211322EN-J
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