Description of Parts
11
Name
B
Trigger level adjustment knob
(EXT TRIG LEVEL)
Function
Selects whether the trigger is activated at the signal level that is input to the
external trigger terminal (on rear).
Adjustment range: 0 to
±
10 V.
If the sweep-wave output from the oscilloscope is used as the external trigger
signal, the stimulation pulse can be monitored at any position on the oscilloscope
tube by setting the level adjustment knob.
Allowing for a noise margin and hysteresis in the built-in comparator, use a
trigger signal to oscillate up to about 1 V lower than the trigger level.
[Fig.11]
When set to SYNC
When the knob is turned fully counterclockwise until it locks (SYNC position),
the trigger level is approxi3 V.
When activating the trigger at a pulse of +5 V, the inconvenience of setting
the level can by avoided by using this position.
External trigger pulse
External
trigger
signal
Approx. 1 V or more is needed
