HP 3400B, User'S And Service Manual

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The HP 3400B is a true root· means· square (RMS) analog voltmeter
capable of measuring ac voltages from 100 microvolts to 300 volts.
It is extremely flexible for audio and RF measurements from 10 Hz to
20 MHz and allows you to measure broadband noise and fast
rise-time pulses.
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Full·scale measurements of non·sinusoidal waveforms with crest
factors (the ratio of peak voltage to
RMS
voltage) up to 10: 1 can be
made. At lIlOth of full scale, pulse trains with 0.01% duty cycle
(100: 1 crest factor) can be measured accurately.
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A single front-panel control selects one of 12 voltage ranges (1 mv.to
300 V)
or decibel ranges
(-72
dBm to
+52
dBm).
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A dc output is provided on the rear panel which is proportional to the
front· panel meter reading. By using this voltage to drive auxiliary
equipment, you can use the voltmeter as an RMS ac·to·dc converter.
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Suitable for bench use or can be rack-mounted using the available
combining case or adapter frame accessories.
The HP 3400B is a form, fit, and function replacement for the original
HP 3400A. Completely redesigned, the "B" version extends the
bandwidth from 10 MHz, available with the
"A"
version, to
2
0 MHz.
The HP 3400B User and Service
Guide
contains new specifications and
calibration procedures for the improved performance of the
HP
3400B.
Updated schematics and replaceable parts lists are also included.
HP
3400B
RMS Voltmeter