Operating Instructions—Type 422 AC-DC
CRT
Channel 1
Sweep
Triggering
Power and
External
Blanking
Fig. 2-7. Front-panel controls and connectors.
STEP ATT BAL
Screwdriver adjustment to balance the ALG ADD: Signals applied to INPUT
input amplifier in the .02, .05 and .1
1 and INPUT 2 connectors are al
positions of the VOLTS/DIV switch. gebraically added and the algebraic
sum is displayed on the CRT. The
INPUT Input connector for vertical deflection
INVERT switch in Channel 2 al
signals.
lows the display to be CH 1 + CH 2
orCH 1 -C H 2 .
Input Coupling
Selects method of coupling input sig
(AC GND DC) nal to input amplifier.
AC: DC component of input signal is
CH 1: The signal applied to the IN
PUT 1 connector is displayed.
blocked. Low frequency —3 dB
CHOPPED: Dual-trace display of
point is about two hertz.
signals on both channels. Display
switched at a repetition rate of
GND: Input circuit is grounded (does
not ground applied signal).
about 150 kilohertz.
CH 2: The signal applied to the IN
DC: Provides coupling for all signals
from DC to 15 megahertz or great
PUT 2 connector is displayed.
er.
ALT: Dual-trace display of signals on
both channels. Display switched be
Mode
Selects mode of operation of vertical
tween channels at end of each
(not labeled)
input amplifiers. sweep.
2-8
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