Model 333A/334A
TABLE
OF
CONTENTS
Table
of
Contents
Section Page
I
GENERAL INFORMATION
........
1-3
1.1
. Description
............
1-3
1.6
.
Accessory Features
........
1-3
1.8
.
Option
...............
1-3
1.10
.
Instrument Identification
.....
1-3
Section
11
INSTALLATION
..............
2
.
1
. Introduction
............
2.3
.
Inspection
.............
2.5
.
Power Requirements
.......
2.7
.
Three-Conductor Power Cable
. .
2
.
10
.
Installation
............
2.12
.
Bench Installation
.......
2.14 . Rack Installation
........
2.16
.
Repackaging For Shipment
....
page
2-1
2-1
2-1
2-1
2-1
2-1
2-1
2-1
2-1
Section
-ge
III
OPERATINGINSTRUCTIONS
......
3-1
3-
1
.
Introduction
............
3
.
1
3.4
.
Controls and Indicators
......
3-1
3.6
.
General Operating Information
.
. 3-1
3.7
. Input Connections
.......
3-1
3.9
. Voltmeter Characteristic$
.
.
3-1
3.12
.
Output Terminals
.......
3-2
3.14
.
Operating Procedures.
......
3-2
3.15
. Instrument Turn.On
......
3-2
3.16
.
Adjustment of Meter
Mechanical Zero
.......
3-2
3.18
.
DistortionMeasurement
...
3-2
3.21
.
RF Carriers (334A only)
...
3-3
3.22
.
Voltage Measurement
.....
3-3
3.23
.
Meter
Indication
.......
3-4
3.27
.
Use
of
Output
Terminals ... 3-4
3.30
. 333A1334A with Option 01 . . 3-4
3.32
.
Manual Nulling
........
3-4
Section
Page
IV THEORY OF OPERATION
........
4-1
4.1
.
Overall Description
........
4-1
4.3
.
Block Diagram Description
....
4-1
4.4
.
Distortion Measuring
4.8
.
Carriers.
..........
4-1
4.10
. Voltmeter Operation
.....
4-1
4.12
.
Detailed Circuit Description
...
4-1
4.13
.
Impedance Converter Circuit
.
4-1
4.17
.
Rejection Amplifier Circuit
.
.
4-2
4.39
.
High Pass
Filter
.......
4-5
4.41
.
Meter Amplifier
.......
4-5
4.49
.
Power Supply Circuit
.....
4-7
4.54
.
RF Detector Circuit (334Aonly) 4-7
Section
Page
5.1
.
Introduction
............
5-1
5.3
.
Required Test Equipment
.....
5-1
Distortion Measurement
of
AM
Operation
..........
4
.
1
Distortion Measurement in
AM
V
MAINTENANCE
.............
5-1
Section Page
V
MAINTENANCE (Cont’d)
.........
5-1
5.5
. Performance Checks
.......
5-1
5.9
. Fundamental Rejection Check . 5-1
5.10
.
Second Harmonic Accuracy .
.
5-2
5.11
.
Instrument Induced
Distortion Check
.......
5-2
5.12
. Frequency Calibration Accuracy
Check
.............
5-3
5.13
.
Automatic Nulling Mode Check 5-4
5.14
.
Input Impedance Check
....
5-4
5.17
. Minimum Input Level Check .
.
5-5
5.18
. DC Isolation Check
......
5-5
5.19
. Voltmeter Accuracy and
Frequency Response Check
5-6
5.20
.
High
Pass
Filter
Check
....
5-7
5.21
.
Residual Noise Check ..... 5-7
5.22
. AM Detector Check (Model
5.23
. Adjustment and Calibration
Procedure
............
5-8
5.26
.
Adjustments
.........
5-8
5.27
.
Voltmeter Gain Adjustments . 5-8
5.28
.
Voltmeter Frequency Response
Adjustment
.........
5-10
5.29
.
Bridge Balance Adjustment
.
. 5-10
5.30
. Sensitivity SwitchCalibration
.
5-11
5.31
.
Components
.........
5-11
334Aonly)
..........
5-7
Power Supply and Bias
Adjustment of Factory Selected
5.33
. Troubleshooting Procedure
....
5-11
5
.38
.
Troubleshooting Voltmeter
Function
...........
5
.
12
5.40
.
Troubleshooting Distortion
Function
...........
5-14
5.45
.
Photoresistor Check and
Adjustment (A6V1 thruA6V5)
.
5-15
5.49
.
Servicing Etched Circuit
Boards
...........
5-16
5.52
. Servicing Rotary Switches
...
5-16
5 -54
*
Converter
........
5-16
Section Page
VI REPLACEABLE PARTS
.........
6-1
6.1
.
Introduction
............
6-1
6.4
.
Ordering Information
.......
6-1
6.6
.
Non-Listed
Parts
.........
6-1
Isolating the Impedance
Section Page
M
CIRCUITDIAGRAMS
...........
7-1
7-
1
.
Introduction
............
7-1
APpen&
A
CODE
LIST
OF
MANUFACTURERS
B SALES AND SERVICE OFFICES
C MANUAL BACKDATING CHANGES
iii
To Next Page
Loading...
Need help?
General
