
, RF-Section:
Phase Lock
Related Performance Test:
Calibrator Amplitude Accuracy Test
A power meter is used to measure the output level of the 100 MHz
CAL OUTPUT signal. The 100 MHz Calibrator circuit on the
Phase Lock Assembly is adjusted as necessary for a -10.00
output level. The harmonic level of the calibrator output signal is
then checked using a second spectrum analyzer.
Power Meter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Spectrum Analyzer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HP 8566B
1. Set the spectrum analyzer LINE switch to STANDBY. Position the
spectrum analyzer on its right side as shown in Figure 3-84, and
remove the RF Section bottom cover.
Figure 3-84. Cal Output Adjustment Setup
2. Set the RF Section LINE switch to ON, and allow
the
RF Section
and power meter/power sensor to warm up for at least 5 minutes.
3. Connect the power sensor to the power meter POWER REF
output, and zero and calibrate the power meter. Connect the
power meter/power sensor to the RF Section front-panel CAL
OUTPUT connector.
4. Adjust
CAL OUTPUT fully clockwise for maximum
circuit gain and verify that the power meter indication is
-9.0
or greater. Adjust
CAL OUTPUT fully
counterclockwise for minimum circuit gain and verify that the
power meter indication is 11
or less.
3-166 Adjustments