Tektronix 305 DMM User manual

Tfektronix
305 DMM
OSCILLOSCOPE
OPERATORS
INSTRUCTION MANUAL

Tektronix. Inc.
P.0. Box 500
Beaverton. Ore on 97077
070-2424-00

Tektronix
COMMITTED TO EXCELLENCE
PLEASE CHECK FOR CHAN E
INFORMATION AT THE REAR
OF THIS MANUAL
305 DMM
OSCILLOSCOPE
OPERATORS
INSTRUCTION MANUAL
First Printin JUL 1978
Serial Number ----------------------------- Revised JUL 1981

Copyri ht e 1978 Tektronix, Inc. All ri hts
reserved. Contents of this publication may not be
reproduced in any form without the written
permission of Tektronix, Inc.
Products of Tektronix, Inc. and its subsidiaries
are covered by U.S. and forei n patents and/or
pendin patents.
TEKTRONIX, TEK. SCOPE-MOBILE, andf^?*
are re istered trademarks of Tektronix, Inc.
TELEQUIPMENT is a re istered trademark of
Tektronix U.K Limited.
Printed in U.S A. Specification and price chan e
privile es are reserved.

TABLE OF CONTENTS
Pa e Pa e
LIST OF ILLUSTRATIONS ii
LIST OF TABLES iii
GENERAL INFORMATION 1ADJUSTMENT AND BASIC DISPLAY 17
Introduction 1Oscilloscope Display 17
Safety Information 1Di ital Multimeter Display 20
Operatin Volta e 2APPLICATION AND MEASUREMENTS 22
Internal Battery Operation 4
Battery Char in 5Instantaneous Amplitude Measurements-DC 22
Battery Care 5Peak-to-Peak Amplitude Measurement-AC 24
Volta e Comparison Measurements 25
CONTROLS AND CONNECTORS 6Time Duration And Frequency Measurement 20
Power Source And Connectors 6Time Difference Measurement Between Two
Calibrator And Display Controls 8 Pulse Waveforms From Different Sources 27
Vertical Controls 8 Dual Trace Phase Difference Measurements 28
Horizontal Controls 11 Hi h Resolution Phase Difference Measurement 30
Tri erin And Sweep Controls 12 Rise Time Measurement 31
Di ital Multimeter Controls 14 Common Mode Rejection 32
BASIC INSTRUMENT OPERATION 15 SPECIFICATION 33
Operatin Considerations 15 Electrical Characteristics 33
REV A SEP 1979 305 Operators

LIST OF ILLUSTRATIONS
Pa e Pa e
Fi ure 1. Description of power source operation. 3Fi ure 13. Example of peaktopeak volta e
Fi ure 2. View of rear cover. 6measurement. 24
Fi ure 3. Ri ht side view of instrument cabinet. 7 Fi ure 14. Example of time duration and frequency
Fi ure 4. Left side view of instrument cabinet. 7 measurement 26
Fi ure 5. Location of display and calibrator controls. 9Fi ure 15. Time difference between two pulses from
Fi ure 6. Location of vertical deflection system different sources. 27
controls. 10 Fi ure 16. Example of dual trace phase difference
Fi ure 7. Location of horizontal deflection system measurement. 28
controls. 11 Fi ure 17. Example of hi h resolution phase difference
Fi ure 8. Location of tri er and sweep controls. 12 measurement. 30
Fi ure 9. Location of di ital multimeter controls. 14 Fi ure 18. Example of rise time measurement. 31
Fi ure 10. Probe compensation. 16 Fi ure 19. Common mode rejection of an undesired
Fi ure 11. Location of external operator adjustments. 19 line frequency. 32
Fi ure 12. Example of instantaneous volta e measure
ment with VOLTS/DIV set at 10M
position. 23
ii 305 Operators REV A SEP 1979

LIST OF TABLES
Pa e
TABLE 1. Battery char e related to operatin tem
perature and char in temperature. 5
TABLE 2. Electrical Characteristics 33
@305 Operators iii

305 DMM Oscilloscope
@
305 Operators

ENERAL INFORMATION
INTRODUCTION
The Sony/Tektronix 305 DMM Oscilloscope is a versatile
solid-state (except crt> portable instrument that combines
small size and li ht wei ht with the ability to make preci
sion waveform and di ital measurements associated with
industrial, military, computer maintenance, and business
machine applications. The 305 is mechanically constructed
to withstand shock, vibration and other environmental
extremes associated with portability. Operatin power for
the instrument is provided by external dc, rechar eable
batteries, or normal power-line volta e. Internal circuitry
rechar es the batteries whenever the instrument is connect
ed to power-line volta e. Selection of the DMM or oscil
loscope function (or both} is made with front panel push
buttons.
The DMM is autoran in and measures resistance, ac
volta e and dc volta e. Full scale measurements are 2 me 
ohms, 700 Vac and 1000 Vdc. The front panel di ital read
out is a 3-Vi di it display containin an automatic ne ative
polarity indicator and decimal point locator. No polarity
indication is shown for positive measurements. Input con
nectors for the multimeter are located on the ri ht side of
the instrument cabinet.
Oscilloscope functions provide dual-channel, dc to 5
me ahertz vertical deflection with calibrated deflection
factors of 5 millivolts/division to 10 volts/division in a 1-2-
5 sequence. The horizontal deflection system provides cali
brated sweep rates from 0.5 second to 1 microsecond per
division. A X10 ma nifier increases the indicated sweep rate
by a factor of ten, extendin the fastest sweep rate of 0.1
microsecond/division. The tri er input may be internal or
external, with tri erin effective over the full bandwidth
of the vertical deflection system. Calibrated X-Y measure
ments are made with Channel 2 (Y) providin the vertical
deflection and Channel 1 (X) horizontal deflection. Oscil
loscope si nal input connectors are located on the left side
of the instrument cabinet The crt display is an 8 X 10 di
vision raticule with each division measurin 0.632 centi
meters (approximately 0.25 inches).
SAFETY INFORMATION
This operatin manual contains information which the
user must follow to ensure safe operation of the instru
ment. Warnin information is intended to protect the
operator while Caution information protects the
instrument.
REV A SEP 1979 305 Operators 1