Frequency; Input Signal Conditioning Check - HP 5334B Service Manual

What Checked:
1. The operation of the MRC is checked using the ratio function.
2. The 10 MHz oscillator signal at the rear panel BNC connector is verified.
For Failure: Refer to Section VIII of this manual. The Measurement Block contains the MRC (Multiple-
Register Counter) and other blocks involved are the Input Amplifier, Executive, Front Panel, and Time
BasePower Supply blocks.
4-19. FREQUENCY
Description: Using this test, a frequency is measured which will exercise the interpolators.
Procedure:
1. Connect the rear panel TIME BASE oscillator signal to the Channel A Input.
2.
Set the HP 5334B as follows:
Reinitialize the 5334B.
Observe: The HP 5334B front panel displays 10.000 000 0 MHz a 0.2 Hz.
Test Record: Mark Pass or Fail on the Operational Verification Test Record Card, line 4.
What Checked: The interpolators which provide the accuracy of the frequency count are tested. Defective inter-
polators may cause the reading to vary up to
+
100 Hz.
For Failure: Refer to Section VIII of this manual. The interpolators are part of the Measurement Block. Other
blocks involved here are the Input Amplifier, DAC, Executive, Front Panel, and Time BasetPower Supply blocks.
4-20. INPUT SIGNAL CONDITIONING CHECK
Description: This series of checks performs a functional test of the front panel relays and circuitry associated
with those relays.
Procedure:
1. Connect the rear panel TIME BASE oscillator signal to the Channel A Input.
2. Set the HP 5334B as follows:
Reinitialize the 5334B.
AUTO TRIG
.........................................................................................................
OFF
COM A
...................................................................................................................
ON
CHAN A and B 50n
............................................................................................
ON
GATE TIME
.........................................................................................................
1 Second
3. Adjust both TRIGGER LEVELISENS controls clockwise until trigger lights just go off.
HP 5334B
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Service Manual
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