Vaisala RVP900 User Manual

Appendix C _____________________________________________ Installation and Test Procedures
VAISALA______________________________________________________________________ 385
Test Passed
C.19 AFC Functional Test (Optional)
Test Goal
Verify that the AFC properly tracks the burst pulse frequency.
Special Test Equipment
- KVM connected
Reference
-See Section 5.4 Ps — Plot Burst Spectra and AFC on page 148
Test Procedure
1. Use the setup terminal to enter the Ps mode and observe the output on
a display scope.
2. Verify the following:
For Customer_________________________________ Date__________
For Vaisala___________________________________ Date__________

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
±15KHz 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 to 30.015 MHz. If it is not in this range, verify that it moves
within this range.

Turn radiate off 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.

Similarly, 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.

Perform the tests above for each pulse width and verify that the AFC
properly tracks the center frequency:
 For pulse width 1.
 For pulse width 2.
 For pulse width 3.

Vaisala RVP900 Specifications

General

Brand	Vaisala
Model	RVP900
Category	Receiver
Language	English