Tektronix 434 User Manual

Operating Instructions—434
5 MHz BW
INVERT
(CH 2 only)
GAIN
A push-push switch that limits the
complete vertical amplifier system
bandwidth to approximately 5
MHz.
A push-push switch to invert the
Channel 2 display.
Screwdriver adjustment to set the
gain of the vertical amplifier.
algebraic sum is displayed on the
CRT. The INVERT switch in
Channel 2 allows the display to
be CH 1 + CH 2 or CH 1 - CH
2.
CHOP: Dual-trace display of signals
on both channels. Display
switched at a repetition rate of
approximately 100 kHz.
STEP ATTEN B A L Screwdriver adjustment to balance
the input am plifier in the 1 m V, 2
mV, 5 mV, and 10 m V positions of
the VO LTS/D IV switches.
Input Coupling Selects method of coupling input
(AC/DC, GND) signal to input am plifier.
AC: In the AC position (button in)
of this push-push switch, signals
are capacitively coupled to the
vertical amplifier. The DC
component of the input signal is
blocked. Low frequency —3 dB
down point is about 10 hertz.
CH 2: Displays Channel 2 only.
Triggering
SOURCE Selects source of trigger signal.
CH 1: A pushbutton switch that in
the CH 1 position (button in)
selects CH 1 as an internal
trigger source.
COMP: A pushbutton switch that
in the COMP position (button
in) allows the internal trigger
source to be determined by the
vertical mode of operation.
CH 1 and CH 2
Input
Mode
(Not labeled)
DC: In the DC position (button
out) of the AC push-push
switch, all components of the
input signal are passed to the
input amplifier.
GND: In the GND position (button
in) of this push-push switch, the
input of the vertical amplifier is
disconnected from the input
connector and grounded. Allows
precharging of the input
coupling capacitor.
Input connectors that allow
application of external signals to
the inputs of the vertical am plifier.
Includes a coding ring for probes
w ith scale factor switching.
Selects mode of operation for
vertical input amplifiers.
CH 1: Displays Channel 1 only.
A L T : Dual-trace display of signals
on both channels. Display
switched between channels at
the end o f each sweep.
EXT ATTEN
COUPLING
AD D: Signals applied to the CH 1
and CH 2 Input connectors are
algebraically added and the
LINE: When both the CH 1 and
COMP switches are pressed in, a
portion of the line frequency
voltage is used as a trigger signal.
EXT: When both the CH 1 and
COMP switches are out, signals
applied to the EXT TRIG
connector are used for
triggering.
In the 1:10 position (button in) of
this push-push switch, external
trigger signals are attenuated by a
factor of 10. In the 1 :'1 position
(button out) external trigger signals
are not attenuated.
Determines method of coupling
trigger signal to trigger circuit.
AC: In the AC position (button in)
of this push-push switch, DC is
rejected and signals below about
20 hertz are attenuated. Accepts
signals between about 20 hertz
and 25 megahertz.
DC: When both the AC and the LF
REJ push-push switches are out,
signals are directly coupled to
the trigger circuit. Accepts all
signals from DC to 25 megahertz
2-3

Tektronix 434 Specifications

General

Brand	Tektronix
Model	434
Category	Test Equipment
Language	English