HP 3400A Service Manual

Model
3400A
Maintenance
This corresponds to a crest factor of 10 where:
=
Ems = Epp you ~D) where D =__'
T, + Ts
cr. = © ae
Ep=E I1-D
EB p=Epp (I-0)
car. = Fen't~D)
E,,
VD(1
—Di
tT,
oT,
——_+
C.F.
=
1-0
(3)
d.
The
Model
3400A
should
indicate
1
volt,
+4%
(includes
the
+
3%
accuracy
of
410C).
e.
Adjust
pulse
generator
pulse
rate
to
250
pps
as
indicated
on
electronic
counter.
This
corresponds
to
a
crest
factor
of
20.
f.
Model
3400A
should
indicate
0.5
volt,
+4%
(includes
the
+3%
accuracy
of
410C.)
5-14. Output Noise Check
a. Connect 50 ohm feedthru to 3400A INPUT.
b.
Connect
another
RMS
Voltmeter
to
DC
output.
c. Set -hp- Model 3400A to 0.001 volt range.
d.
The
reading
on
the
RMS
Voltmeter
should
not
exceed
1
mV.
5-15.
ADJUSTMENT
AND
CALIBRATION
PROCEDURES
5-16.
The
following
is
a
complete
adjustment
and
calibration
procedure
for
the
Model
3400A.
These
procedures
should
be
conducted
only
if
it
has
previously
been
established
by
Perfor-
mance
Checks,
Paragraph
5-5
to
5-14,
that
the
Model
3400A
is
out
of
adjustment.
In-
discriminate
adjustment
of
the
internal
controls
to
refine
settings
may
actually
cause
more
difficulty.
If
the
procedures
outlined
do
not
rectify
any
maladjustments
that
may
exist,
and
you
have
carefully
rechecked
your
connections
and
settings,
refer
to
Paragraph
5-29,
Troubleshooting
Procedures
for
possible
cause
and
recommended
corrective
action.
NOTE
Unless
otherwise
noted,
the
3400A’s
top
and
side
covers
have
to
be
removed
to
calibrate
and
adjust
the
instrument.
5-17. Mechanical Meter Zero
5-18.
The
mechanical
meter
zero
screw
is
located
on
the
instrument
front
panel.
If
the
meter
pointer
does
not
indicate
zero
when
the
instrument
power
has
been
off
for
at
least
one
minute,
mechanically
zero
the
meter
following
the
procedure
outlined
below.

HP 3400A Specifications

General

Brand	HP
Model	3400A
Category	Measuring Instruments
Language	English