Tektronix TG501 User manual

Tektronix
INSTRUCTION MANUAL
TG 501
TIME MARK
GENERATOR

lëktronix
COMMITTED TO EXCELLENCE
PLEASE CHECK FOR CHANGE INFORMATION
AT THE REAR OF THIS MAN AL.
TG 501
TIME MARK
GENERATOR
INSTRUCTION MANUAL
Tektronix, Inc.
P.O. Box 500
Beaverton, Oregon 97077
Serial Number -----------------------------------
070-1576-02
Product Group 75
First Printing OCT 1978
Revised FEB 1984

TG 501
TABLE OF CONTENTS
Page
LIST OF ILL STRATIONS ....................................................................................................................... ii
Section 1 Specification ........................................................................................................ 1-1
Section 2 Operating Instructions ....................................................................................... 2-1
WARNING
THE FOLLOWING SERVICE INSTRUCTIONS ARE FOR USE BY QUALIFIED
PERSONNEL ONLY. TO AVOID PERSONAL INJURY, DO NOT PERFORM
ANY SERVICING OTHER THAN THAT CONTAINED IN OPERATING
INSTRUCTIONS UNLESS YOU ARE QUALIFIED TO DO SO.
Section 3 Theory of Operation ........................................................................................... 3-1
Section 4 Caibration Procedure ......................................................................................... 4-1
Performance Check ...................................................................................... 4-1
Adjustment Procedure ................................................................................. 4-5
Section 5 Maintenance ........................................................................................................ 5-1
Section 6 Options ................................................................................................................. 6-1
Section 7 Rep aceab e Eectrica Parts ............................................................................. 7-1
Section 8 Diagrams and I ustrations .................................................................................. 8-1
Section 9 Rep aceab e Mechanica Parts ........................................................................... 9-1
REV D AUG 1980
i

LIST OF ILL STRATIONS
Figure
No. Page
2-1 Pug-in insta ation and remova ................................................................. 2-1
2-2 Contros and Connectors .................................................................................. 2-2
2-3 Timing error of time base .......................................................................... 2-3
2-4 Measuring timing error of time base .......................................................... 2-3
2-5 Markers approximatey at pu se duration and period .............................. 2-4
2-6 Measuring pu se duration .................................................................................. 2-4
2- 7 Measuring pu se period ............................................................................... 2-5
3- 1 Functiona B ock Diagram of schematic diagrams 1 and 2 circuitry ............. 3-3
3-2 Functiona B ock Diagram of schematic diagram 3 circuitry ......................... 3-5
3-3 Functiona B ock Diagram of schematic diagram 4 circuitry ......................... 3-7
3-4 Functiona B ock Diagram of schematic diagram 5 circuitry ......................... 3-9
5-1 Semiconductor device ead configuration found in the TM 500 fami y .... 5-5
5-2 Location of jumpers and integrated circuits required for c ock options ... 5-9
jj @ AUG 1980

TG 501
OPERATORS SAFETY S MMARY
The genera safety information in this part of the summary
is for both operating and servicing personne . Specific
warnings and cautions wi be found throughout the
manua where they appy, but may not appear in this
summary.
power cord into a propery wired receptace before
connecting to the product input or output terminas. A
protective ground connection by way of the grounding
conductor in the power cord is essentia for safe opera 
tion.
Terms In This Manual
CAUTION statements identify conditions or practices that
cou d resut in damage to the equipment or other property.
WARNING statements identify conditions or practices
that cou d resut in persona injury or oss of ife.
Terms As Marked on Equipment
CAUTION indicates a persona injury hazard not im 
mediate y accessib e as one reads the marking, or a
hazard to property inc uding the equipment itse f.
DANGER indicates a persona injury hazard immediate y
accessibe as one reads the marking.
Symbols As Marked on Equipment
DANGER — High vo tage.
Protective ground (earth) termina.
ATTENTION — refer to manua.
Power Source
This product is intended to operate from a power source
that wi not app y more than 250 vo ts rms between the
supp y conductors or between either supp y conductor
and ground. A protective ground connection by way ofthe
grounding conductor in the power cord is essentia for
safe operation.
Grounding the Product
This product is grounded through the grounding conduc 
tor of the power cord. To avoid e ectrica shock, p ug the
Danger Arising From Loss of Ground
Upon oss of the protective-ground connection, a
accessib e conductive parts (inc uding knobs and con 
tros that may appear to be insuating) can render an
e ectric shock.
se the Proper Power Cord
Use on y the power cord and connector specified for your
product.
Use on y a power cord that is in good condition.
Refer cord and connector changes to qua ified service
personne .
se the Proper Fuse
To avoid fire hazard, use on y the fuse of correct type,
vo tage rating and current rating as specified in the parts
ist for your product.
Refer fuse rep acement to qua ified service personne .
Do Not Operate in Explosive Atmospheres
To avoid exp osion, do not operate this product in an
exp osive atmosphere un ess it has been specifica y
certified for such operation.
Do Not Operate Plug-In nit Without Covers
To avoid persona injury, do not operate this product
without covers or pane s insta ed. Do not appy power to
the p ug-in via a p ug-in extender.
@ AUG 1980
iii

TG 501
SERVICE SAFETY S MMARY
FOR QUALIFIED SERVICE PERSONNEL ONLY
Refer als t the preceding Operat rs Safety Summary.
Do Not Service Alone
Do not perform interna service or adjustment of this
product un ess another person capab e of rendering first
aid and resuscitation is present.
se Care When Servicing With Power On
Dangerous votages exist at severa points in this product.
To avoid persona injury, do not touch exposed connec 
tions and components whie power is on.
Disconnect power before removing protective pane s,
so dering, or repacing components.
Power Source
This product is intended to operate from a power source
that wi not appy more than 250 vo ts rms between the
supp y conductors or between either suppy conductor
and ground. A protective ground connection by way of the
grounding conductor in the power cord is essentia for
safe operation.
@ AUG 1980
V

TG 501
TG 501 Time Mark Generator
VI
REV B JAN 1977

Section 1 — TG 501
SPECIFICATION
INTROD CTION
Description
The TG 501 is a genera purpose Time Mark Generator
p ug-in designed to operate in a TM 500 Series Power
Modu e. A Variab e Timing Readout provides a simpe but
accurate means of measuring timing errors over ±7.5%
minimum range. Since many specifications are given in
percentages, the error readout e iminates the need for
computations and, additiona y, essens para ax dis 
crepancies.
waves are seected by se f-cance ing push-buttons when
the rotary switch is in the 521 n position.
A outputs are avai ab e at the front-pane connectors,
or by modification at the interface connector, ocated at
the back of the p ug-in, and the TM 500 Series Power
Modue.
Marker se ection from 5 s through 1 ns in a 1, 2, 5,
sequence is avai ab e. 5 s through 10 ns markers are
se ected by a rotary switch. 5, 2, and 2 ns modified sine
Power supp ies are current imited. The 5 V suppy is
over-votage protected to avoid damage to the integrated
circuits.
Table 1-1
ELECTRICAL CHARACTERISTICS
Characteristics Performance
Requirements Supplemental Information
Markers 5 s through 1 ns in a 1, 2, 5
sequence.
5 s through 10 ns are seected
by a rotary switch. 5 ns, 2 ns,
and 1 ns are push button seected
modified sine waves.
Marker Ampitude >1 V peak on 5 s through 10 ns
markers. >750 mV peak-to-peak into
50  on 5 ns and 2 ns markers.
>200 mV peak-to-peak into 50 
on 1 ns markers.
Trigger Output Signa
Saved to marker output from 5 s
through 100 ns. Remains at 100 ns
for a faster markers.
Ampitude same as marker ampitude.
Interna Reference
Standard Option 01
Crysta Frequency 1 MHz 5 MHz
Stabiity (0°C to +50° C)
after 1/2 hour warm-up
Within 1 part
in 10 5
Within 5 parts
in 10 7
Long-Term Drift
1 part or ess
in 10 5 per
month
1 part or ess
in 10 7 per
month
Setabiity
Adjustabe to
within 1 part
in 10 7
Adjustab e to
within 5 parts
in 10 ’
REV D SEP 1980
1-1

Table 1-1 (cont)
Specification — TG 501
Characteristics Performance Requirement
Supplemental Information
Externa Reference Input
(Avai ab e Ony if U50 and
jumpers are insta ed and U100
is removed)
Lift pin 3 of U350 from socket;
IC and jumpers for 5 or 10 MHz,
1 MHz externa reference requires
jumpers.
Acceptab e Frequencies 1 MHz, 5 MHz, or 10 MHz.
Interna y hard wired so output
frequencies counted down to 1 MHz.
Input Ampitude Must be TTL, compatibe.
Error Readout Range
To ±7.5%.
Timing Error Measurement
Accuracy
Device under test error is
indicated to within one east
significant digit (i.e., to
within one dispayed count).
Exampe; If DUT Timing error reads
3.0% s ow, the absoute accuracy
wi be between 2.9% and 3.1%
s ow.
Table 1-2
ENVIRONMENTAL CHARACTERISTICS
Characteristics Description
Temperature
Meets M L-T-28800B, c ass 5.
Operating
0°C to +50° C
Non-operating -55° C to +75° C
Humidity
95% RH, 0°C to 30°C Exceeds M L-T-28800B, c ass 5.
75% RH, 30°C to 40° C
45% RH, 40° C to 50° C
Atitude Exceeds MIL-T-28800B, c ass 5.
Operating 4.6 Km (15,000 ft)
Non-operating 15 Km (50,000 ft)
Vibration
0.38 mm(0.015 inch peak- Exceeds MIL-T-28800B, c ass 5,
to-peak, 5 Hz to 55 Hz, when insta ed in qua ified
75 minutes. power modu es.
Shock
30 g's (1/2 sine) 11 ms Meets MIL-T-28800B, c ass 5,
duration, 3 shocks in each when insta ed in quaified
direction a ong 3 major axes, power modues.
18 tota shocks.
Bench Handing 12 drops from 45°, 4 inch Meets MIL-T-28800B, c ass 5.
r equiibrium, whichever
occurs first.
Transportation
Qua ified under Nationa Safe Transit Association Preshipment Test
Procedures 1A-B-1 and 1A-B-2.
EMC Within imits of MIL-461A, and F.C.C. Regu ations, Part 15, Subpart J,
Cass A.
E ectrica Discharge
20 kV maximum charge app ied to instrument case.
1-2
REV D AUG 1980

Specification — TG 501
Table 1-3
PHYSICAL CHARACTERISTICS
Characteristics Description
Finish
Anodized a uminum pane and chassis
Net Weight 2 bs., 4 oz. (1 kg.)
Dimensions 2.633 in. (66.8 mm) w
x 11.240 in. (285.3 mm) d
x 4.961 in. (125.9 mm) h
REV C AUG 1980
1-3