Tektronix T922 User Manual

Operating
Instructions-T921/T922/T922R
2-6
I
L I MODE-Selects the operating
mode for the trigger
circuit .
AUTO : With the
proper LEVEL control setting,
the sweep can be triggered
by trigger signals with
repetition rates above about
20 Hz . In the
absence of an adequate trigger signal, or when
the LEVEL
control is misadjusted, the sweep free
runs to provide a reference display .
NORM : Permits triggering
on displayed signal .
In the absence of an adequate
trigger signal, or
when the LEVEL control is misadjusted, the
sweep does not run and no display is visible .
Setting
SOURCE to LINE position provides an
adequate trigger signal .
TV : Permits
triggering on television signals .
Triggers on TV field when
SEC/DIV switch is set
at .1 ms or slower . Triggers
on TV line when
SEC/DIV switch is set at
50 Ns or faster . Set the
SLOPE switch to +OUT for sync-positive input
signals and to -IN for sync-negative
input
signals .
(SLOPE-Selects the
positive- or negative-going
slope of the trigger
waveform
.
+OUT :
The sweep can be triggered from the
positive-going portion
of a trigger signal .
Fig . 2-6 . Time base front panel controls and connectors .
-IN : The sweep can be triggered from the
negative-going portion of a trigger signal .
LEVEL-Selects the amplitude
point on the trigger
signal at which the sweep is triggered .
Usually
adjusted for the desired display after trigger
SOURCE and
SLOPE have been selected .
(X (External Trigger)-Provides input
for external
trigger signals or for X axis signals in the X-Y mode .
SEC/DIV-Selects calibrated sweep
rates in a 1-2-5
sequence . X1-X10
variable control must be in the X1
detent position (fully ccw)
to read calibrated sweep
rates directly from the
SEC/DIV knob . Knob
numerals with
N
underneath indicates
sweep rates in
microseconds/division, numerals
with rn
underneath indicate
sweep rates in millisecon-
ds/division, positions with
no symbol under the
numerals indicate
sweep rates in seconds/division .
X1-X10-Provides calibrated sweep
rates when in X1
(fully ccw) detent position . Increases
the horizontal
gain by a factor of 10, providing at least
20 ns/div
sweep rate in
the X10 detent position (fully cw) with
the SEC/DIV knob set
to .2 /is .
(POSITION-Controls the horizontal
position of the
crt display .
REV . B APR 197 7

Tektronix T922 Specifications

General

Brand	Tektronix
Model	T922
Category	Test Equipment
Language	English