The 2465A, 2455A, and 2445A
The TEKTRONIX 2465A, 2455A,
and
2445A portable oscilloscopes have four
vertical channels with
DC
to 350 MHz, 250 MHz, and 150 MHz bandwidths.
Deflection factors run from 2 mV to 5 V per division,
in
a 1-2-5 sequence, with either
1
MO
or
50 0 input resistance,
in
channels 1 and
2.
Either AC
or
DC
input coupling
is
available at 1
MO.
Channels 3 and 4 give
0.1
V
or
0.5 V per division, with 1
MO
input
resistance, and
DC
coupling. With the standard 10X probes, channels 1 and 2 display
20
mV to 50 V/division and channels 3 and 4 display 1 V
or
5 V/division.
The trigger systems work automatically for most
signals. They operate in various
modes, from any
channel, with couplings for a wide range
of
signals. The 2445A
triggers from
DC
to
250 MHz. The 2455A and 2465A trigger from
DC
to 500 MHz.
Sweep speeds range from 1.5 s to 1 ns per division on the 2445A and 2455A and
to
500 ps per division on the 2465A, including the effects
of
the X10 magnifier and the
calibrated variable between 1-2-5 steps. Horizontal displays include A-Sweep, B-
Sweep (delayed), A alternated with B, and CH 1 (for X/V displays).
The SETUP features, AUTO, SAVE, and RECALL, save time and prevent errors,
whether you are a novice operator
or
a master. AUTO Setup works with almost any
signal. For repeating measurements, the Save and Recall functions record and restore
as
many as 30 instrument setups, including the extended-function options. Setups can
be
recalled either immediately
or
sequentially.
Digital readouts of time, voltage, scale factors, trigger levels, and auxiliary
information
also save time and reduce errors.
With the
available Counter/Timer/Trigger (CIT), Option 06
or
Option 09,
measurements require even less effort and give better accuracy. The
CIT
increases
trigger
selectivity, especially
in
digital systems. Option 09 includes the
CIT
and a
17
-bit Word Recognizer (WR). The available Television/Video (TV) enhancement,
Option 05, can trigger
at
any desired point
in
a frame and it can reduce the effects
of
ac
coupling and hum in a video signal. The available Digital Multimeter (DMM)
measures dc voltage, dc current, ac rms voltage, ac rms current, resistance, and
temperature with
floating inputs.
Instruments with
CIT
include MENU
in
the Trigger Mode selection. The
WR
adds a
Word Recognizer Probe connector on the rear
panel. The TV enhancement adds
LINES, FLD1, and FLD2 Trigger
Coupling.
The.
available GPIB interface accesses all controls and digital readings. The
interface adds
GPIB status indicators, just above the CRT. See the 24X5A/2467 GPIB
(Option
10) Instrument Interfacing Guide for information on integrating the instrument
into a
GPIB system.
The 2465A CT
includes
CIT
and
WR
(Option 09) and GPIB (Option 10). The
2465A
DM
adds
DMM
(Option 01) and also includes
CIT
and
WR
(Option 09) and
GPIB (Option 10). The 2465A
DV
adds TV (Option 05)
to
the features of the 2465A
DM.
Illustrations
at
the back
of
the manual show the instrument front and rear panels.
2465A/2455A/2445A Operators ix
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