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T EK T R O N IX
D C 505
UNIV ER S A L
CO U NTER/TIDIE R


I N ST RU CTIO N M A NU A L
Te ktronix, Inc.
. . Box 500
Beaverton, Oregon 97005 Serial Nu m ber



070-1665-00 F irst P rinting JULY 1974
WA RR A NTY

All T EK T R ONIX inst r ume n ts are wa rra n ted agai n st
defective mate r ials and wor k mans h i p for o n e year .
Any q uestio n s wit h respect to t h e wa rr anty s h ould
be ta k en up wit h you r TE K T R O N IX F ield En gi n ee r or
re p resentative .

All re q uests fo r repai r s a n d r e p laceme n t parts
s h oul d be d i rected to t h e T EK T R O N IX F ield Office
o r re prese n tative i n yo ur area . T h is will assure you
t h e fastest p ossible service . P lease i n clude t h e
inst ru ment Ty p e N umber or P art N um b er a nd Serial
N umber wit h all re q uests for p a r ts or service .

Specifications a n d price c h ange privileges rese rved .

Co p y r ig h t , 1974 by Te k tronix, Inc., B eaverton,
Orego n . P ri n ted in th e Un ited States of Ame rica . All
r ig h ts r eserved . Con tents of t h is publication may not
be re pr oduced in a n y for m with out permission of
Te k tro n ix, Inc .


U .S.A. and foreign T E K T R ONIX p roducts covered
b y U .S. and foreig n p atents and/or patents pending .

TEKTRONIX is r egistered tra dema rk of Te k tronix,
Inc .
DC505


TA BLE
OF CO N T EN TS
Page
SECTION 1 OPER ATI N G INSTRU CTIO NS
IN TR OD U CTIO N 1-1
I n stallation 1-1

OPER ATIONAL CHECK 1-2

Controls and Connectors 1-2
Display Tests 1-2
Channels & 1-3
Ratio / Check 1-4
I NPUT CON SID ERATIONS 1-4
Input Sources 1-4
Inp ut Cou pling 1-4
Attenuators and Maximum Inp ut Volts 1-4
Sensitivity and Frequency Range 1-4
Slope and L evel 1-4
FRE QUENCY MEASUREMENTS 1-5
Frequency 1-5
Triggeri ng 1-5
Measurement Intervals 1-5
Measurement Rate 1-5
RATIO ME AS UREMEN TS 1-6
Triggering 1-6
Resol utio n 1-6
PER IOD MEAS UREMEN TS 1-6
Gating 1-6
Averaging 1-6
L ow F requencies 1-6
TIME IN TERVAL MEAS UREMENTS 1-6
Time Interval Averaging ' 1-7
S i ngle-Shot Using H OLD 1-7
WIDT H MEASUREMEN TS 1-7
Time Interval Averagi ng 1-7
Single-Sh ot U sing H O LD 1-7
EVENT MEASUREMEN TS 1-8
Averaging 1-8
TOTALIZING 1-9
P urpose 1-9
Operation 1-9
FUN CTIO NS AVAILABLE AT REAR CONNECTO R 1-9
Customizing the Interface 1-9
Control L ines 1-9
Sig nal L ines 1-9
DC 505


TA BLE
O F CO N T E NTS
(cont)
SECTION 1 OPERATING INSTRUCTIONS (cont) P age
ELECTRICAL C HARACTERISTICS 1-10
Performance Conditions 1-10
Table 1-6 Channels & Input 1-10
Table 1-7 Display Resolution
and Accuracy 1-11
Table 1-8 Internal Time B ase 1-13
Table 1-9 Display 1-1
Table 1-10 Outp uts 1-14
Table 1-11 Environmental 1-15

SECTION 2 THEORY OF OPERATION
INPUT AND TRIGGER 2-1
AC/DC Selection, Attenuators, an d
Cou pling, CH & ( ) 2-1
Input Amplifier, Signal Shaping,
Slope Selection an d Output 2-1
Signal Selection 2-1
Time - 2-2
AVERAGING AND CONTROL 2-2
Averaging Divi d er 2-2
Gate an d Control L ogic Generator 2-2
Phase L ock Loop 2-3
COUNTERS, DISPLAY MULTIPLEXING, TIME
B ASE AND PARAMETER SELECTION 2-4
10