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334A
HP 334A Technical Manual
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By Order of the Secretary of the Army:
Offical:
KENNETH G. WICKHAM
Major General, United States Army,
The Adjutant General.
HAROLD K. JOHNSON,
General, United States Army,
Chief of Staff.
Distribution:
Active Army
:
USAMB (1)
USACDCEC (1)
USACDCCEA (1)
TOAD (6)
USACDCCEA :
LEAD (8)
Ft Huachuca (1)
NG
: None.
USAR:
None.
For explanation of abbreviations used, see AR 320-50.
* U. S. GOVERNMENT PRINTING OFFICE : 1990 0 - 262-912 (30346)
SAAD (5)
Eighth USA (5)
42
44
Table of Contents
Default Chapter
3
Table of Contents
3
Section
7
1 General Information
7
1-A.1 Scope
7
L-A.3 Forms and Records
7
Description
9
Accessory Features
9
Modifications
9
2 II
11
Section
11
Installation
11
Introduction
11
Inspection
11
Power Requirements
11
Three-Conductor Power Cable
11
Bench Installation
11
Rack Installation
11
Repackaging for Shipment
11
3 III Operating Instructions
13
Section
13
Operating Instructions
13
Introduction
13
Controls and Indicators
13
Adjustment of Mechanical Zero
13
General Operating Information
13
Input Connections
13
Voltmeter Characteristics
13
Use of Output Terminals
13
Operating Procedures
14
Distortion Measurement
14
Section
17
4 Theory of Operation
17
Overall Description
17
Block Diagram Description
17
Distortion Measuring Operation
17
Distortion Measurement in am
17
Carriers
17
Voltmeter Operation
17
Schematic Theory
17
Impedance Converter Circuit
17
Rejection Amplifier Circuit
18
High Pass Filter
21
Meter Circuit
21
Power Supply Circuit
23
RF Detector Circuit (334A Only) . L
23
Vmaintenance
25
Test Equipment Required
25
Performance Checks
25
Fundamental Rejection Check
25
Second Harmonic Accuracy Check
26
Distortion Introduced by Instrument Check and Automatic Control Loop Operation
26
Frequency Calibration Accuracy Check
27
Input Resistance Check
28
Input Shunt Capacitance Check
28
Minimum Input Level Check
28
DC Isolation Check
28
Voltmeter Accuracy Check
29
High Pass Filter Check
29
Voltmeter Frequency Response Check
30
Residual Noise Check
30
AM Detector Check (Model 334A Only)
30
Adjustment and Calibration Procedure
31
Meter Mechanical Zero Set
31
Power Supply and Bias Adjustments
31
A3R16 and A3R30 Distortion Adjust
33
Bridge Balance Adjustment (C3)
33
Voltmeter Gain Adjustments
34
Voltmeter Frequency Response Adjustment
34
Sensitivity Switch Calibration
34
Troubleshooting Procedures
35
Bottom Shield Removal
35
Servicing Etched Circuit Boards
35
Servicing Rotary Switches
37
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HP 334A Specifications
General
Brand
HP
Model
334A
Category
Measuring Instruments
Language
English
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