HP 3400A Service Manual

Model 3400A
Oresers
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Direct reading meter: dc meter which indicates rms
voltage level of input signal.
Mechanical zero adjustment: screwdriver adjustment for
zero of direct reading meter.
LINE ON pilot lamp: neon lamp which indicates when
power is applied to instrument and power switch is ON.
Power switch: two-position toggle switch which applies
115- or 230-volts ac to instrument.
RANGE switch: 12-position rotary switch which selects
various attenuation ranges available within Model 3400A.
INPUT connector: BNC jack which enables application of
input signal to instruments measuring circuits.
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Operating Instructions
115/230-volt switch: two-position slide switch which
sets
instrument
to
operate
from
either
a
115-
or
230-volt
ac source.
Input
power
jack:
three-prong
jack
which
enables
ap-
plication
of
line
voltage
to
instruments
power
supply
cir-
cuits.
115V/230V .25A FUSE: 0.25 ampere fuse which
provides protection against line voltage surges.
DC OUT jack: telephone-type jack which provides
negative
1-volt
de
out
at
full
scale
deflection,
output
is
°
Proportional
to
meter
deflection.
Output
impedance
is
1000 ohms.
A
telephone
plug
for
the
DC
OUT
jack
may
be
purchased
under
-hp-
Part
No.
1251-0067.
Figure 3-1. Model 3400A Controls and Indicators
3-3/3-4

HP 3400A Specifications

General

Brand	HP
Model	3400A
Category	Measuring Instruments
Language	English