AFC Functional Test (Optional)

Test Goal

Verify that the AFC properly tracks the burst pulse frequency.

Test Equipment

KVM connected

Test Procedure

1. Enter the TTY setups through dspx.
2. Enter the Ps mode and observe the output on a display scope.
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 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.

   • 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