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5Hz to 1MHz
WIDE RANGE FULLY AUTOMATIC
DISTORTION ANALYZER
MODEL 6900B SERIAL NO. __________
OPERATING AND MAINTENANCE
MANUAL
Unit 4, 15 Jonathan Drive, Brockton, MA 02301-5566
Tel: (508) 580-1660; Fax: (508) 583-8989
E-mail: [email protected]; Web: www.krohn-hite.com
Model 6900B Table of Contents
TABLE OF CONTENTS
1.0 GENERAL DESCRIPTION ....................................................................................................... 1-1
1.1 Introduction ................................................................................................................. 1-1
1.2 Specifications .............................................................................................................. 1-1
1.3 General Specification ................................................................................................... 1-3
2.0 OPERATION ........................................................................................................................... 2-1
2.1 Introductions................................................................................................................ 2-1
2.2 Power Requirements.................................................................................................... 2-1
2.3 Turn-on Procedure....................................................................................................... 2-1
2.4 Controls, Terminals, Indicators...................................................................................... 2-1
2.5 Operation .................................................................................................................... 2-2
2.6 Optional Features ........................................................................................................ 2-4
3.0 INCOMING ACCEPTANCE...................................................................................................... 3-1
3.1 Introduction ................................................................................................................. 3-1
3.2 Procedure ................................................................................................................... 3-1
4.0 CIRCUIT DESCRIPTION.......................................................................................................... 4-1
4.1 Introduction ................................................................................................................. 4-1
4.2 Circuit Description........................................................................................................ 4-1
5.0 CALIBRATION ........................................................................................................................ 5-1
5.1 Introduction ................................................................................................................. 5-1
5.2 Calibration Procedure................................................................................................... 5-1
5.3 Power Supply .............................................................................................................. 5-1
5.4 Voltmeter Calibration.................................................................................................... 5-2
5.5 Input Amplifier Calibration............................................................................................. 5-3
5.6 Stepping Amplifier Calibration ....................................................................................... 5-3
5.7 Output Amplifier Calibration .......................................................................................... 5-3
5.8 Frequency Detector Calibration..................................................................................... 5-4
5.9 1kHz Oscillator Calibration............................................................................................ 5-4
5.10 1kHz Calibration .......................................................................................................... 5-4
5.11 Integrator Level Calibration ........................................................................................... 5-4
5.12 Calibration Adjustments................................................................................................ 5-4
6.0 MAINTENANCE ...................................................................................................................... 6-1
6.1 Introduction ................................................................................................................. 6-1
6.2 Trouble-Shooting Procedure......................................................................................... 6-1
6.3 Step-by-Step Troubleshooting procedure....................................................................... 6-1
6.4 Power Supply .............................................................................................................. 6-6
6.5 ALC Amplifier .............................................................................................................. 6-6
6.6 Null Amplifier ............................................................................................................... 6-7
6.7 Meter Amplifier ............................................................................................................ 6-7
6.8 Operational Rectifier .................................................................................................... 6-7
6.9 Integrator..................................................................................................................... 6-8
6.10 Voltage Discriminator ................................................................................................... 6-8
6.11 Frequency Discriminator ............................................................................................... 6-8
6.12 Oscillator ..................................................................................................................... 6-8
7.0 PARTS LISTS, SCHEMATICS AND BOARD LAYOUTS ........................................................... 7-1
7.1 Ordering Information .................................................................................................... 7-1
7.2 Ordering Unlisted Parts ................................................................................................ 7-1
Model 6900B
Figure 1.1 Model 6900B
Model 6900B Section 1