Tektronix 454A Operator's Handbook

COUPLING
Determines method
of coupling
trigger
signal to trigger circuit.
AC: Rejects DC and attenuates sig-
nals below about 30 hertz. Ac-
cepts
signals between about 30
hertz and 150,megahertz.
System.
When CH 1 light is "on,
trigger. signal is obtain~ only
from the Channel 1 input signal;
when the light
is off, the trigger
signal
is obtained from the dis-
played channel(s). Source of
internal trigger signal is selected
by the TR IGGER switch.
LF REJ: (Low Frequency Reject)
Rejects
DC and attenuates sig-
nals below about 50 kilohertz.
LI NE: Trigger
signal obtained from
a sample of the line voltage ap-
plied to this instrument.
Accepts
signals betWeen about
50 kilohertz
and 150 megahertz.
HF REJ:
(High Frequenc!y Reject)
Accepts
signals between about
30 hertz and 50 ki lohertz; re-
jects DC and attenuates signals
outside the above
range.
EXT: Trigger signal obtained from
an external signal applied to the
EXT TRIG INPUT connector.
EXT -:- 10: Attenuates external trig-
ger signals 10 times.
SOURCE
DC: Accepts all trigger signals
from
DC to 150 megahertz or greater.
Selects source
of trigger signal.
CH 1 Light indicates that the intern,,1
trigger signal
is obtained only from
the signal connected to the INPUT
CH 1 connector (see TR IGGE R
switch).
I
NT: Internal trigger signal ob-
tained from VertiCal Deflection
EXT TRIG INPUT
I
nput connector for external trigger
signal.
8 4~A ®

Tektronix 454A Specifications

General

Brand	Tektronix
Model	454A
Category	Test Equipment
Language	English