HP 3400A Service Manual

SECTION |
GENERAL INFORMATION
1-1. INTRODUCTION
1-2.
This
section
contains
general
information
about
the
Model 3400A
RMS
Voltmeter
(Figure
1-1).
Included
are:
description
of
instrument,
purpose,
instrument
identification,
equipment
supplied
and
accessory
equipment
available.
Also
included
is
a
table
of
instru-
ment
specifications.
1-3. DESCRIPTION AND PURPOSE
1-4.
The
Model
3400A
RMS
Voltmeter
measures
the
actual
root-means-square
(RMS)
value
of
ac
voltages
between
100
microvolts
and
300
volts.
Frequency
range
is
from
10
Hz
to
10
MHz.
Full
scale
measurements
of
nonsinusoidal
waveforms
with
crest
factors
(ratio
of
peak
voltage
to
rms
voltage)
of
10
can
be
made.
1-5.
Ac
voltages
are
measured
with
a
specified
full-scale
accuracy
of
+1%
from
50
Hz
to
1
MHz,
+2%
from
1
MHz
to
2
MHz,
+3%
from
2
MHz
to
3
MHz,
and
+
5%
from
10
Hz
to
50
Hz
and
3
MHz
to
10
MHz.
A
single
front
panel
control
selects
one
of
12
voltage
or
decibel
ranges.
1-6.
The
Model
3400A
crest
factor
rating
is
10:1
which
enables
full
scale
readings
for
pulses
which
have
a
1%
duty
cycle.
At
1/10th
of
full
scale,
pulse
trains
with
0.01%
duty
cycle
(100:1
crest
factor)
can
be
accurately
measured.
1-7.
The
Model
3400A
provides
a
dc
output
which
is
proportional
to
the
front
panel
meter
reading.
By
using
this
voltage
to
drive
auxiliary
equipment,
the
Model
3400A
functions
as
an
rms
ac-to-dce
converter.
1-8. SPECIFICATIONS
1-9.
Table
1-1
contains
the
specifications
for
the
Model
3400A.
1-10.
INSTRUMENT
AND
MANUAL
IDENTIFICATION
1-11.
Hewlett-Packard
uses
a
two-section
serial
number.
If
the
first
section
(serial
prefix)
of
the
serial
number
on
your
instrument
does
not
agree
with
those
on
the
title
page
of
this
manual,
change
sheets
supplied
with
the
manual
will
define
the
differences
between
your
in-
strument
and
the
Model
3400A
described
in
this
manual.
Some
serial
numbers
may
have
a
letter
separating
the
two
sections
of
the
number.
This
letter
indicates
the
country
in
which
the
instrument
was
manufactured.
1-12. EQUIPMENT SUPPLIED
1-13.
The
equipment
supplied
with
each
Model
3400A
is
listed
and
described
in
Table
1-2.
I-]

HP 3400A Specifications

General

Brand	HP
Model	3400A
Category	Measuring Instruments
Language	English