Table of Contents
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SECTION
1
CHARACTERISTICS
Introduction
The Type 3A6 Dual-Trace Amplifier plug-in unit contains
two identical amplifier channels.
Either channel can be used
independently for a single-trace display, or the two channels
can be electronically switched for a dual-trace display.
Also,
the two channels can
be added
algebraically and the re-
sultant waveform displayed on the indicator unit crt.
A signal delay line in the plug-in unit delays the signal to
be displayed while the triggering signal passes to the time
base undelayed.
This allows the leading edge of the trig-
gering signal to be viewed on the crt.
The Type 3A6 can be used with any of the Tektronix 560-
Series Oscilloscopes*
or with the Tektronix Type
129 Plug-
In Unit Power Supply.
Frequency Response
De to 10 mc
(not more
than
3db
down
at 10 me) with
a
corresponding
risetime
of
typically
35
nanoseconds.
Deflection
Factors
Ten
calibrated
steps for each channel;
.01, .02, .05, .1, .2,
5,
1, 2, 5 and
10 volts/division.
Variable
control
in each
channel
permits
continuous,
uncalibrated
adjustment
from
0.01
to about 25 volts/division in conjunction with the step
switch.
Accuracy
Within
--3%
of indicated
deflection
with VARIABLE
in
the CALIB position.
Input Impedance
1 ] megohm
-+1%, paralled by about 47 pf.
Input Coupling
Ac or de coupled, selected by front-panel switch,
In the
*Cannot
be
used
with
a
Type
560.
Also,
when
used
with
a
Type
2B67
or 3B2
time-base
plug-in
unit or with
a Type 565
or RM565,
it may
not be
possible
to view the entire
leading
edge
of the trig-
gering
waveform
due
to the delay
of
these
time-base
circuits.
AC position low-frequency response is limited to about 2 cps
(0.2 cps with 10 < passive probe).
Maximum Input Voltage
600 volts combined
de and
peak ac; 600 volts peak-to-
peak
ac.
Polarity Inversion
Polarity of Channel 1 can be changed to provide 180° in-
version. No polarity inversion of Channel 2.
Operating Modes
Channel 1 only.
Channel 2 only.
Alternate between channels.
Chopped
between channels at approximately 150 ke rate.
Added
Algebraically.
Channel Isolation
50,000:1
or greater
at 100 ke.
Triggering
Internal triggering signals for time base are provided from
both channels or from Channel 1 only, determined by front-
panel switch.
Mechanical Features
Input connectors:
BNC jacks.
Construction: Aluminum alloy chassis and panel.
Accessories
Information
on
accessories
for use with
this instrument
is
included at the rear of the mechanical
parts list.
1-1
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