Specifications

12
7 --
This switch chooses the display type. The choices are Main, Mix, Delay,
and X-Y. We'll discuss each in more detail below.
8
Position
Controls the horizontal position of the trace(s) on the screen.
9 Illum
Turns power on to the scope and controls the illumination of the
graticule, the scale printed on the CRT.
10
Position
Adjusts the vertical position of the trace of channel 1's signal.
11
Position
Adjusts the vertical position of the trace of channel 2's signal.
12 Dly. Time Pos.
This is a dual control. The inner (larger diameter control) sets the delay
time of the delayed sweep. The outer (smaller diameter control) is used
to vary the main timebase sweep speed.
13
Delay time/div
Adjusts the sweep time of the delayed timebase.
14
--
Selects the coupling of channel 1. The choices are DC, AC, and ground.
15 Volt/div
The large (inner) control adjusts the calibrated vertical gain of channel 1.
The smaller (outer) control continuously varies the vertical gain (this
control is sometimes incorrectly called a vernier). Turn the outer control
fully clockwise to have it click and be in the calibrated position. The
uncalibrated position is useful for e.g. setting a signal to full screen
height, then noting the change in signal amplitude for some physical
change in the circuit. It is also used for rise time measurements using
the 10%-90% marks on the screen.
16 Vert mode
Chooses which channels of the scope are displayed and how they're
displayed. The choices are CH1, CH2, DUAL, X-Y, and Add.
17
Volt/div
Same behavior as 15, except for channel 2.
18
--
Selects the coupling of channel 2. The choices are DC, AC, and ground.
19 Comp. test
A pushbutton switch that turns on component test. We'll discuss this
more below.
20 Beam find
A pushbutton switch that helps you figure out which controls need to be
adjusted to get a trace onto the screen.
21
Main time/div
Adjusts the sweep time of the main timebase.
22 Trace rotation
This is an adjustment that rotates the trace on the screen so that the
trace is parallel to the graticule.
The letters identify the connectors for inputs and outputs from the scope:
ID
Label
Function
A
--
Channel 1 input
B
--
Component test signal output (see discussion below)
C GND
Chassis ground connection. The chassis is connected to the power line
ground conductor via the power plug.
D CAL
Probe calibration signal (2 Vpp, 1 kHz square wave). It is used to adjust
the compensation of oscilloscope probes.
E
--
Channel 2 input
F Ext trig External trigger input
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