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CAUTION
If the observed waveform is low level AC, make sure it is not riding on a high ampli-
tude
DC voltage.
You will also have to reset the Trigger MODE switch (14) to NORM if the signal frequency is below 25Hz, and
possibly readjust the Trigger LEVEL control (9).
2-2-4. Dual trace Operation
Dual trace operation is the major operating mode of the 630-2. The setup for dual trace operating is identi-
cal to that of 2-3-2 single trace operation with the following exceptions:
1. Set the V MODE switch (5) to either DUAL. Select ALT for relatively high frequency signals (TIME/DIV
switch set to 0.5ms or faster). Select CHOP for relatively low frequency signals (TIME/DIV switch set to
1ms or slower)
2. If both channels are displayed in signals of the same frequency, set the Trigger SOURCE switch (18) to
the channel having the steepest-slope waveform. If the signals are different but harmonically related, trig-
ger from the channel carrying the lowest frequency. Also, remember that if you disconnect the channel
serving as the trigger source, the entire display will free run.
38
(b) TV – V Vertikale Videosignalkopplung
(c) TV-H Horizontale Videosignalkopplung
(d) synchrone Polarität
Abb. 2 – 3 Gebrauch des Trigger – TV – V – und TV – Schalters
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