GND - vertical amplifier input circuit is grounded. The applied input
signal is connected to ground through a large resistor to provide a
pre-charge path for the AC input coupling capacitor.
DC - all components of the input signal are passed to the vertical
amplifier system.
6.
&
7.
STEP ATTEN BALance - a screwdriver adjustment to balance the
vertical amplifier system for minimum trace shift when switching
deflection factors.
8.
&
9.
Vertical POSition - controls the vertical position of the appropriate
trace. OFF detent turns the channel off.
10.
&
11.
VOLTS/DIV VARiable - provides a continuously variable deflection
factor between the calibrated settings of the VOLTS/DIV switch for
the appropriate vertical channel. Extends the maximum deflection
factor to at least 125 volts/div.
12.
VERTical GAIN - screwdriver adjustment to set the gain of the
vertical amplifier system.
13.
AUTO PRESET - screwdriver adjustment to set the AUTO PRESET
trigger point for automatic trigger operation.
14.
Trigger SOURCE - selects the source of the trigger signal.
COMP - the sweep is triggered from a DC coupled sample of the
vertical deflection signal after the vertical switching.
CH 2 - the sweep is triggered from an AC coupled sample of the
vertical deflection signal before the vertical switching and only from
Channel 2.
EXT - the sweep is triggered from the DC coupled signal applied to
the EXT TRIG banana jack.
3
212 Operators Handbook
