Tektronix 067-1002-99 User manual

Tektronix, Inc.
P.O. Box 500
Beaverton, Oregon 97077
MANUAL PART NO.
061-2393-00
COMMITTED TO EXCELLENCE
067-1002-99
POWER SUPPLY
CALIBRATION FIXTURE
(for Universal Load Unit)
INSTRUCTION MANUAL
First Printing FEB 1981

Copyright © 1981 by Tektronix, Inc., Beaverton, Oregon.
Printed in the United States of America. All rights reserved.
Contents of this publication may not be reproduced in any
form without permission of Tektronix, Inc.
This instrument, in whole or in part, may be protected by one
or more
U.S. or foreign patents or patent applications.
Information provided on request by Tektronix, Inc., P.O. Box
500, Beaverton, Oregon 97077.
TEKTRONIX is a registered trademark of Tektronix, Inc.

MANUAL REVISION STATUS
PRODUCT: 067-1002-99 Calibration Fixture
This manual supports the following versions of this product: 067-1002-99
REV. DATE DESCRIPTION
@ FEB 1981 Original Issue
067-1002-99 FIXTURE
@

Section 1
Section 2
Section 3
CONTENTS
Page
INTRODUCTION
About This Manual .......................... 1-1
Description of the Module .................. 1-2
SPECIFICATIONS
Physical ................................... 2-1
Electrical ................................. 2-2
Environmental .........................•.... 2-7
Cable ...................................... 2-7
I WARNING l
The remaining portion of this Table of
Contents lists servicing instructions
that expose personnel to hazardous volt-
ages. These instructions are for quali-
fied service personnel only.
POWER SUPPLY PERFORMANCE CHECK
Safety Summary ............................. 3-1
General .................................... 3-2
Equipment Required ............•............ 3-3
Pre par at ion ...........•.................... 3-4
Procedures .................•............... 3-7
NOTE
To adjust the power supply, refer to the
adjustment procedure in the service
manual for the product in which the
supply is installed.
DC Supplies .......... · ................... 3-7
Line Voltages ..........•...•............ 3-17
INIT-0 and PWRFL-0 ...................... 3-18
067-1002-99 FIXTURE @
ii

Section 4
Section 5
Seotion 6
iii
REPLACEABLE ELECTRICAL PARTS
DIAGRAMS AND SCHEMATICS
REPLACEABLE MECHANICAL PARTS
@
067-1002-99 FIXTURE

ILLUSTRATIONS
Figure
Description Page
1-1 The 067-1002-99 Calibration Fixture ........ v
3- 1 -Remote Swi t ch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3- 3
3-2 Performance Check Set-Up ................... 3-4
3-3 Connecting the Load Unit to the
Power Supply ............................... 3-6
3-4
Connecting the Trigger to the
Power Supply ............................... 3-8
3-5 Measuring 40 kHz Ripple .................... 3-10
3-6 Measuring 60 Hz Ripple ..................... 3-15
3-7 Power-Up Waveform ................ -- .......... 3-19
3-8 Power-Down Waveform ................. ~ ...... 3-20
TABLES
Table
Description
Page
2-1 Physical Specification ........ ~ ............ 2-1
2-2 Electrical Specification ................... 2-3
2-3 Interconnect Cable Pin-Out ................. 2-7
3-1 Performance Check Summary .................. 3-12
067-1002-99 FIXTURE
@
iv

Figure 1-1. The 067-1002-99 Calibration Fixture.
v @
067-1002-99 FIXTURE

Section 1
INTRODUCTION
ABOUT THIS MANUAL
This manual describes the 067-1002-99 Calibration Fixture
(Figure 1-1) and its use in servicing of the 620-0295-00 Low
Voltage Power Supply. The manual includes:
• Specifications
• Cable and schematic diagrams
• Parts list
• The performance check procedure for the power
supply.
The following documents contain related information:
• 067-0883-99 Universal Load Unit Instruction Manual.
Refer to this manual for general operating instruc-
tions and for the calibration fixture (plug-in)
theory of operation.
• 620-0295-00 Low Voltage Power Supply Service Manual.
Refer to this manual for power supply schematics,
parts lists, maintenance procedures, and theory of
operation. The Maintenance section contains a proce-
dure to bring up supplies which are not operating
properly or which have been repaired. The manual
also contains an abbreviated performance check
procedure for use in the field.
NOTE
When a Universal Load Unit is available,
the performance check procedure in this
manual should be used in preference to
the procedure in the power supply ser-
vice manual.
067-1002-99 FIXTURE
@
1-1

INTRODUCTION
• The service manual for the product in which the
power supply is installed. To adjust the power
supply, refer to the adjustment procedure in this
manual.
DESCRIPTION OF THE MODULE
The calibration fixture includes two assemblies:
• A personality plug-in for the TEKTRONIX Universal
Load Unit
• A cable harness
The plug-in assembly consists of a metal framework enclosing
a circuit board. An edge connector at the rear of the board
connects it with the load unit. The circuit board includes a
set of resistors which program two load levels for each
channel. These resistors were selected in accordance with
equations given in the appendix to the load unit instruction
manual.
A chart on the front of the plug-in lists the voltage range
for each supply. Channels 1 and 2 are connected in parallel
to the +5 V supply, and Channels 5 and 6 are connected in
parallel to the +55 V supply.
The cable assembly connects the load unit to the power
supply under test.
1-2 @
067-1002-99 FIXTURE