Table of Contents
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The instruments on the following pages are useful accessories in certain
applications of the bridge.
Table A lists some of the instruments and their
primary use with the bridge.
*GR instruments. For a detailed description see the General Radio Catalog.
TABLE A
BRIDGE ACCESSORIES
TUNED AMPLIFIER
NULL DETECTOR
Type 1232-A
m
20 Hz to 20 kHz, 50 and 100 kHz
=
0. l-pV sensitivity
m
bandwidth approx 5%
120-dB gain
The Type 1232 Detector is a sensitive, general-
purpose, metered audio amplifier.
Intrinsically broad-
band (
+3
dB from 20 Hz to 20 kHz), i t has optional
filtering that can be tuned continuously over the audio-
Catalog
Description
frequency range or at spots up to 100 kHz.
Its utility as a null detector is enhanced by high
Detector
gain, longlife battery power, and the optional logarith-
amp) and companion 8-in. in-
mic response characteristic. The output is adequate to
strument
drive headphones.
ACCESSORY*
Type 1560-P95 Adaptor Cable
Type 1650-PI Test Jig
Type 1412-BC Decade Capacitor
Type 1350 Generator-Recorder
Assembl y
Type 1232 Tuned Amplifier and
Null Detector
Types 1309, 1310, 131 1, and 1313
Oscillators
Type 1900 Wave Analyzer
Type 1 191 Counter
A P P E N D I X 1
APPLICATION
Connections to:
External bias.
Detector output.
External DO potentiometer.
Incoming inspection.
(Rapid checking of single components.)
RAC and GAC reactive balances.
Transducer Analysis.
(Investigating sharp resonances in
mechanical transducers.)
External detector.
External generators.
High frequency (>20 kHz) tuned null
detector.
Tracking generator.
Checking frequency of external ac
generator.
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