2-1-2 Vertical Amplifier
Block
Refer to Figure 2-2 for references (10) to (12) and (14) to (23).
Refer to Figure 2-3 for reference (13).
VOLTS/DIV switches To select the calibrated deflection
factor of the input signals fed to the
vertical amplifier.
VARIABLEcontrols Provide continuously variable
adjustment of deflection factor between
steps of the VOLTS/DIV switches.
Calibrations are accurate only when the
VARIABLE controls are detented in
their fully clockwise positions.
PULL X 10 MAG Pulling these out will increase the
(on VARIABLE sensitivity of the associated vertical
controls) amplifiers by ten times at reduced
bandwidth.
Ground Connector Provides convenient point to attach
separate ground lead to oscilloscope.
CH-1 OUTPUT Provides scaled output of the channel 1
Connector signal suitable for driving a frequency
counter or other instrument.
CH- 1 or X-IN For applying an input signal to vertical
connector amplifier channel 1, or the X-axis
(horizontal) amplifier during X-Y
operation.
CH-2 or Y-IN For applying an input signal to vertical
connector amplifier 2, or the Y-axis (vertical)
amplifier during X-Y operation.
AC/GND/DC To select the method of coupling the
switches input signals to the vertical amplifiers.
AC position connects a capacitor
between the input connector and its
associated amplifier circuitry to block
any DC component in the input signal.
GND position connects the amplifier
input to ground instead of the input
connector, so a ground reference can be
established. DC position connects the
amplifier inputs directly to the
associated input connector, thereby
passing alt signal components on to the
amplifiers.
Channel 1 Vertical For vertically positioning trace 1 on the
POSITION control CRT screen. Clockwise rotation moves
the trace up. Inoperative during X-Y
operation.
Channel 2 Vertical or For vertically positioning trace 2 on the
Y POSITION control CRT screen. Clockwise rotation moves
the trace up. Adjusts the Y-axis of the
trace during X-Y operation.
CH-2 INV switch Push in to invert the polarity of the
Channel 2 signal.
X-Y switch Push in to select X-Y operation.
V MODE switches To select the vertical amplifier display
mode.
CH-1
push-button displays only
the input signal of channel 1 on the
CRT when pressed
Figure 2-2
Vertical Amplifier Block
CH-2
push-button displays only the input signal
of channel 2 on the CRT when pressed.
ALT
push-button displays the input signals of
both channels 1 and 2 (or more) on the CRT
when pressed. The CRT beam is switched
between channels at the end of each sweep to
achieve this multi-channel display.
CHOP
push-button displays the input signals of
both channels 1 and 2 (or more) on the CRT
when pressed. The CRT beam is switched
between channels at a 250 kHz rate during the
horizontal sweep to achieve this multi-channel
display.
ADD
push-button displays a single trace that is
the algebraic sum of the input signals of channels
1 and 2 when pressed.
PULL TRIPLE control When pulled, displays traces for
CH-1,
CH-2, and CH-3 (trigger), providing
ALT or CHOP push-button is also
pressed. Rotating this control also
vertically positions the CH-3 trace on
the CRT screen. This control is not
operative if any single-trace display
mode is selected.
PULL QUAD control When pulled, displays traces for
CH-l,
CH-2, CH-3 (trigger), and algebraic
sum of CH-1 and CH-2 signals,
providing ALT of CHOP pushbutton is
also pressed. This control is not
operative if any single-trace display
mode is selected.
10
11
23
22
12
13
14
15
15
15
16
17
18
19
20
21
4