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Model 1740A
General Information
SECTION |
GENERAL INFORMATION
1-1.
INTRODUCTION.
1-2.
The
Hewlett-Packard
Model
1740A
is a dual-
channel,
100-MHz,
delayed
sweep
oscilloscope
de-
signed
for general-purpose
bench
or field use. The
dual-channel
vertical deflection
system has 12 cali-
brated deflection factors from 5 mV/div to 20 V/div.
Input impedance is selectable (50 ohms or 1 megohm)
to
meet
various
measurement
requirements.
The
horizontal
deflection
system
has
calibrated
sweep
rates from 2 s/div to 0.05 us/div and delayed sweep
rates from 20 ms/div to 0.05 us/div.
A 10X magnifier
expands all sweeps by a factor of 10 and extends the
fastest sweep to 5 ns/div. In alternate or chop modes,
the
trigger-view
control
feature
will display
three
signals: channel A, channel B, and trigger signal. This
allows
correlation
of the time
between
the trigger
signal and the channel A and channel B signals. With
the A VS B control, an X-Y mode
of operation is
possible. The channel A input (Y-axis) is plotted versus
the channel B input (X-axis).
1-3.
This manual contains installation and operating
instructions, as well as maintenance information for
the Model
1740A. Instrument specifications and pro-
cedures for verifying proper operation are included.
Procedures are also included for adjusting the instru-
ment
to its performance
specifications.
Schematic
diagrams, the theory of operation, and troubleshooting
information are provided for use in maintaining the
instrument.
1-4,
This section of the manual contains the perform-
ance specifications for the Model
1740A, and a list of
the options available. It also lists the accessories sup-
plied with the Model 1740A and other accessories that
are available. Instrument and manual identification in-
formation are also included.
1-5.
SPECIFICATIONS.
1-6.
Table 1-1 is a complete list of the Model 1740A
critical specifications that are controlled by tolerances.
Table 1-2 contains general information that describes
operating characteristics of the Model 1740A.
1-7.
Any change in the specifications due to manufac-
turing, design, or traceability to the U.S. National
Bureau of Standards will be listed on a manual change
sheet included
with this manual.
The manual
and
manual
change
sheet supersede
all previous
infor-
mation concerning specifications of the 1740A.
1-8.
ACCESSORIES SUPPLIED.
1-9.
The following accessories are supplied with the
1740A:
One Blue Light Filter, HP Part No. 01740-02701
One Front-panel Cover, HP Part No. 5040-0516
One Accessory Storage Pouch, HP Part No. 1540-
0292
Two 10:1 Divider Probes, HP Model No. 10006D
1-10.
ACCESSORIES AVAILABLE.
1-11.
The following accessories are available for the
1740A:
Model 10002A 50:1 Divider Probe
Model 10004D 10:1 Divider Probe
Model 10007B 1:1 Divider Probe
Model 10020A Resistive Divider Prove Kit (Divi-
sion ratios of 1:1, 5:1, 10:1, 20:1, 50:1, and 100:1)
Model 10173A: RFI Metal Mesh Contrast Screen
Model 10140A: Collapsible Viewing Hood
Model
197A:
Oscilloscope
Camera
(Requires
a
Model 10376A Adapter for mounting on 1740A)
Models
1001A,
1002A,
and
1114A:
Testmobiles
(All accept the Model 1740A and provide mobile
stands for the oscilloscope)
1-12.
OPTIONS.
1-13.
The options listed below extend the usefulness
of the Model 1740A.
OPTION
001. Option 001 replaces the standard
de-
tachable power cord with a captive power cord. There
are two standard options available that install a special
CRT in the standard instrument. The only difference
between the optional CRT and the standard CRT is the
phosphor used in the CRT. Option 007 uses P7 phos-
phor and Option 011 uses P11 phosphor.
OPTION 090. This option omits the two Model 10006D
divider probes normally supplied as accessories. Other
probes listed under Accessories Available, which
are
more suitable, may be specified.
OPTION 101. Option 101 is designed for optimum per-
formance
with the HP Model
1607A
Logic State An-
alyzer to provide both digital logical state and analog
electrical analysis. (Refer to Section IV for circuit de-
tails and Section VI for a list of replaceable parts in
Option 101.)
1-1
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