Figure 6. Location of vertical deflection system controls.
selects method o f coupling the in p u t signal to the vertical
deflection system.
AC: Input signal is capacitively coupled to the vertical
attenuator circuit. Dc component o f the input signal is
blocked. Lower frequency lim it (lower —3 dB point) is
about 10 hertz.
GND: Connects the in p u t attenuator to ground provid
ing a zero (ground) reference voltage display (does not
ground the input signal). Allows precharging o f the vertical
in p u t coupling capacitor by applying the input signal via a
one megohm resistor.
DC: A ll components o f the input signal are directly
coupled to the vertical attenuators.
20.
Display M ode-Five position lever switch that selects
the operation mode o f the vertical deflection system (signal
displayed on the crt).
C H I: Displays the signal applied to the CHI (X) INPUT
connector.
CH2: Selects the signal applied to the CH2 (Y) INPUT
connector for display. The CH2 mode position is selected
fo r X-Y operation (in conjunction with X-Y position o f SEC/
D IV switch) and provides vertical deflection from the CH2
INPUT.
10
305 Operators
REV A SEP 1979