Auto Trigger - HP 5334B Service Manual

4. Set:
..........................................................................
Channel A to Negative SLOPE
OFF
-
..........................................................................
Channel B to Negative SLOPE
ON
Observe: The H P 5334B front panel displays 50 ns
+
6 ns.
5. Set:
..........................................................................
Channel A to Negative SLOPE
ON
..........................................................................
Channel B to Negative SLOPE OFF
Observe: The H P 5334B front panel displays 50 ns
+
6 ns.
Test Record: Mark Pass or Fail on the Operational Verification Test Record Card, line 6.
What Checked: Time interval measurement and slope switch operation.
For Failures: Refer to Section VIII of this manual. In this case, the Input Amplifier, DAC, Measurement, Execu-
tive, Front Panel, and Time Basepower Supply blocks are involved.
4-22. AUTO TRIGGER
Description: The Measurement microcomputer sends a signal to the DAC block and disables the front panel trig-
ger level controls.
Procedure:
1. Connect the rear panel TIME BASE oscillator signal to the Channel A Input.
2. Set the H P 5334B as follows:
Reinitialize the 5334B.
GATE TIME
.........................................................................................................
1 Second
Obsewe: The H P 5334B front panel displays 10.000 000 0 MHz
-+
0.2 Hz and both Channel A and B trigger
lights are flashing.
3. Rotate Channel A trigger level control.
Observe: There is no effect on the Counter's operation.
4. Set AUTO TRIG to OFF. Rotate Channel A trigger level control.
Obsewe: Extreme clockwise and counterclockwise control settings will stop the gating and update of the
Counter. Trigger light stops flashing.
5. Set AUTO TRIG to ON. Connect the rear panel TIME BASE oscillator signal to Input B. Set FUNCTION
to FREQ B.
Obsewe: The H P 5334B front panel displays 10.000 000 0 MHz
+
0.2 Hz and Channel A and B trigger
lights are flashing.
HP 5334B
-
Service Manual
4-9