Controls, Connectors, and Indicators
(20) A u xilia ry Ground J a c k —Provides an auxiliary chassis ground con-
nection (banana jack) between the equipment under test and the
2245A.
(
2
T) Channel 3 and Channel 4 POSITION C ontrols—Adjust vertical po-
sition of Channel 3 and Channel 4 signal displays.
( 2 2 )
Channel 3 and Channel 4 VO LTS/DIV S w itch es—Select two basic
/ deflection factors for Channel 3 and Channel 4, 0.5 volt/division (but
ton lit) or 0.1 volt/division (button not lit).
The VOLTS/DIV switch setting displayed in the crt readout reflects
the attenuation factor of coded attenuator probes that are connected
to the vertical inputs.
(2 3 J
CH 3 and CH 4 Input C on ne cto rs—Connect signals to the inputs of
the Channel 3 and Channel 4 vertical attenuators. Input coupling is dc
only.
The input connectors are BNC with probe-coding ring contacts (the
same as Channel 1 and Channel 2). The limited choice of deflection
factors for the Channel 3 and Channel 4 inputs makes them useful for
digital and trigger signals.
Horizontal
Refer to Figure 2-4 for location of items 24 through 31.
(24) POSITION C on trol—Adjusts the horizontal position of the waveform
displays on the crt.
(2?) X10 M AG S w itch —Magnifies the A and B sweeps by a factor of 10
and extends the fastest sweep speed to 2 ns per division. The center
portion of an unmagnified sweep display will be within 0.5 division of
the center of a magnified sweep display. No action occurs in X-Y
mode.
When X10 MAG is on, a X10 symbol is displayed next to the SEC/DIV
readouts. The readouts reflect correct display sweep speeds for the
X I0 MAG displays and the unmagnified displays.
2245A Operators
2 -7
