Tektronix 422, Instruction Manual

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Specification—Type 422 AC-DC
Characteristic Performance
Delay Line
Permits viewing of leading edge
of triggering signal (internal trig­
gering only).
TRIGGERING
Trigger Source (select­
ed by front-panel
TRIGGERING
Source switch)
Internal from both Channel 1
and 2.
Internal from Channel 1 only.
External from signal applied to
TRIG IN connector.
Trigger Coupling (select­
ed by front-panel
TRIGGERING
Coupling switch)
AC (capacitive)coupled.
AC (capacitive) coupled with
a tte n u a tio n of low-frequency
signals.
DC (direct) coupled.
Trigger Slope (select­
ed by front-panel
SLOPE switch)
Sweep can be triggered from the
positive-going or negative-going
portion of trigger signal.
Trigger Level LEVEL control allows selection
o f the triggering point on the
selected slope of the trigger
signal.
Trigger Mode (select­
ed by front-panel
TRIGGERING Mode
switch)
AUTO Mode fo r triggered sweep
at point selected by LEVEL con­
trol when adequate trigger signal
is applied (see Trigger Sensitiv­
ity); sweep free runs at sweep
ra te selected by T IM E /D IV
switch when trigger signal is in­
adequate or below 20 hertz.
NORM Mode fo r triggered sweep
at point selected by LEVEL con­
trol when adequate trigger signal
is applied (see Trigger Sensitiv­
ity); no trace when trigger signal
is inadequate.
Trigger Sensitivity
(AUTO and NORM
Mode)
Internal
AC 0.2 division of deflection m ini­
mum, 50 hertz to five mega­
hertz; increasing to one division
at 15 megahertz.
AC LF REJ 0.2 division of deflection m ini­
mum, 50 kilohertz to five mega­
hertz; increasing to one division
at 15 megahertz. Will not trigger
on two-division or less sine wave
at 120 hertz or less.
Characteristic Performance
DC
0.2 division of deflection m ini­
mum, DC to five megahertz; in­
creasing to one division at 15
megahertz.
External
AC 125 m illiv o lts m inimum, 50
hertz to five megahertz; increas­
ing to 0.6 volt at 15 megahertz.
AC LF REJ 125 m illivolts minimum, 50 kilo­
hertz to five megahertz; increas­
ing to 0.6 volt at 15 megahertz.
Will not trigger on 1.25 volt or
less sine wave at 120 hertz or
less.
DC
125 m illivolts minimum, DC to
five megahertz; increasing to 0.6
volt at 15 megahertz.
External Trigger Input
RC characteristics 100 kilohms ±3% paralleled by
33 picofarads ±5 pF.
Maximum Input vo lt­
age
250 volts DC + peak AC.
LEVEL control range
A t least +10 to —10 volts.
TIM E BASE
Sweep Rate
Calibrated range
Unmagnified 0.5 second to 0.5 microsecond/
division in 19 steps. Steps in
1-2-5 sequence.
Magnified
50 milliseconds to 0.05 micro-
second/division in 19 steps.
Steps in 1-2-5 sequence.
Uncalibrated (vari­
able) range
Continuously variable between
calibrated sweep rate settings.
E x te n d s slowest uncalibrated
sweep rate to at least 1.25
seconds/division.
Accuracy
Unmagnified
Over center eight
divisions
W ithin 3% o f indicated sweep
rate.
Over any tw o divi­
sion portion w ith ­
in center eight
divisions
Within 4% o f indicated sweep
rate.
Magnified
Over center eight
divisions
Within 5% o f equivalent sweep
rate.
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