59
Subject to change without notice
34
RV4001:
Trigger-Symmetry
– Locate and identify RV4001 on the TB-Board.
– Connect a 25mV
pp
, 50 kHz sine wave signal to input CH I.
– Set attenuator CH I to 5 mV/div.
– Set input coupling CH I to AC.
– Set time base to 50 μs/div.
– Set trigger coupling to AC.
– Check that the AT/NM pushbutton is in AT (automatic trigger)
position (pushbutton switch OUT).
– Set LEVEL control to centre position.
– Reduce signal height to 0.5 div by switching the attenuator
to 50 mV/div.
– Adjust RV4001 for a triggered signal display.
– Press and release SLOPE pushbutton and adjust RV4001
for correct triggering on both SLOPE conditions.
– Reduce signal height carefully by turning the variable gain
knob to the left (ccw) and adjust RV4001 for minimum signal
height triggering in both SLOPE settings.
– Check that triggering is performed with a signal height less
than .5 division.
50 kHz @ 5 mV/div
50 mV/div Level ccw
Slope +
50 mV/div Level cw
Slope +
50 mV/div Level ccw
Slope –
50 mV/div Level cw
Slope –
RV4003
RV4004
CV4001
RV4005
TB-Board
RV4002
RV4001
A d j u s t m e n t P r o c e d e r e H M 3 0 3 - 6
