Vaisala RVP900 - Checking Input if Signal Level; Table 105 AFC Setup Checklist

3. Verify the following:
• Verify the system is in AFC mode by checking that the text on the terminal for the
AFC % output says AFC.
• Verify the frequency displayed on the setup terminal is within ±15 KHz of the center
IF frequency (the default value for the AFC hysteresis outer limit in the Mb
command); for example, in the range 29.985 ... 30.015 MHz.
If it is not in this range, verify that it moves within this range.
• Turn radiate
o for 10 minutes and then turn the radiate back on. Observe to see if
the AFC properly tracks the magnetron frequency as the magnetron warms.
• Set the control signal to the maximum and minimum values using MFC, then turn on
AFC. Observe to see if the AFC properly tracks back to the correct frequency.
4. Perform the tests listed above for each pulse width and verify that the AFC properly
tracks the center frequency:
• For pulse width 0.
• For pulse width 1.
• For pulse width 2.
• For pulse width 3.
Checklist
Table 105 AFC Setup Checklist
Task Checked OK/Not OK Remarks
Test procedure completed successfully.
Parameters are set.
See 6.6 Ps — Plot Burst Spectra and AFC (page 137).
Test Passed
For Customer Date:
For Vaisala Date:
A.21 Checking Input IF Signal Level
Test Goal
Verify that the input signal level is optimized for RVP901 by observing the power in the noise
using the Pr command.
You can perform this procedure with the transmitter
o since, in theory, it is only
measures receiver properties. However, you may notice some noise interaction between
the Tx and Rx.
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