1'!ktron00
EXCELLENCE
COMMITTED
TO
Tektronix,
Box
P.O.
Beaverton,
Inc.
500
Oregon
97077
PLEASE
THE
AT
CHECK
REAR
OF
067
SWEEP GENERATOR
INSTRUCTION
FOR
CHANGE
THIS MANUAL.
-1
011
-00
DIGITAL
MANUAL
Serial
Number
______
INFORMATION
_
070-3679-00
Product Group
First Printing JAN 1982
20
I
I ,
I
i
Copyright
Contents of this publication may not
©
1982 Tektronix,
Inc.
All
rights reserved.
be
reproduced
form without the written permission of Tektronix,
Products of Tektronix,
by
U.S.
and
foreign patents and/or pending patents.
TEKTRONIX, TEK, SCOPE-MOBILE,
registered trademarks of Tektronix,
is a registered trademark of Tektronix
Printed
in
U.S.A.
Inc.
and
Specification
its subsidiaries
and
Inc.
TELEQUIPMENT
U.K.
Limited.
and
price change
are
are reserved.
in
Inc.
covered
~
~
privileges
any
are
OPERATOR'S
SERVICE
Section
SAFETY
1
SAFETY
SPECIFICATION
SUMMARY
SUMMARY
••••••••••••••••••••••••••••••••••••
067-1011-00
TABLE
OF
DSG
CONTENTS
.................................
Page
iv
v
Seotion
PRODUCT
PERFORMANCE
CHARACTERISTlCS
OPERATING
2
Installation
Functions
Indicators
and
APPLICATIONS
Jumper
Frequency Response
Digitally
1900
Genlocking
Blanking
Picture
Sinewave
Markers
OPERATING
Harmonics
Data
ECL
Traceability
NBS
DESCRIPTION
CONDITIONS
........................
•••••••••••••••••••••
............................
INSTRUCTIONS
and Removal
Controls,
of
•••••••••••••••••••••••••••••
Instructions
Connectors,
.................................
Options
Locking
Digital
for
Monitor
Horizontal
••••••••••••••••••••••••••••••••••••
CONSIDERATIONS
of
Transmission
•••••••••••••••••••••••••••••
•••••••••••••••••
to
DSG
the
Sweep
••••••••••••••••••••
••••••••••••••••••
TRS
1900
the
Composite
Testing
Testing
DSG
the
•••••••••••••••••••••••••••
to
Reset
.....................
Digital
Sweep
•••••••••••••••••••••••••••
•••••••••••••••••
••••••••••••••••••••••
the
•••••••••••••••
......
Blackburst
••
1-1
1-3
1-3
2-1
2-2
2-3
2-3
2-4
2-4
2-4
2-4
2-6
2-6
2-9
2-9
2-9
2-9
2-11
i
067-1011-00
DSG
Section
THEORY
3
General
Circuit
PART
Internal
External
Timing
Black
Sweep
Manual Frequency
Cosine
Output
Reset
PART
General
+5V
-5.2V
OF
1:
2:
Supply
TABLE
OPERATION
OF
CONTENTS
(cont)
....................................
Overview
THE
SWEEP
Lock
Lock
•••••••••••••••••••••••••••••••••••••
Burst
Control
Generator
Off
Supply
Generator
•••••••••••••••••••••••••••••••••••••
Operation
THE
SWITCHING
••••••••••••••••••••••••••••••••••••
•••••••••••••••••••••••••••••••••
•••••••••••••••••••••••••••
GENERATOR
••••••••••••••••••
..............................
••••••••••••••••••••••••••••••
••••••••••••••••••••••
••••••••••••••••••••••••••••••
Control
•••••••••••••••••••••••••••
••••••••••••••••••••••••
•••@•••••••••••••••••••••••••••
•••••••••••••••••••
POWER
SUPPLY
••••••••••
3-1
3-1
3-1
3-1
3-3
3-5
3-9
3-9
3-10
3-10
3-10
3-10
3-11
3-11
3-11
3-13
Section
4
CALIBRATION
Introduction
General
Preliminary
PERFORMANCE
ADJUSTMENT
...............................
Instructions
Procedure
AND
FUNCTIONAL
PROCEDURE
•••••••••••••••••••••••
••••••••••••••••••••••
CHECK
•••••••••••••••••••••••••
PROCEDURE
4-1
4-1
4-3
4-3
4-11
ii
067-1011-00
DSG
Section
TABLE
5
MAINTENANCE
Preventive
Cleaning
Lubrtcation
Adjustment
TROUBLESHOOTING
Theory
Diagrams
Circuit
Component and Wiring
Testing
of
Op.eration
•••••••••••••••••••••••••••••••••••
Board
Equipment
TROUBLESHOOTING
Control
Fuses
Static-Sensitive
Test
Circuit
Voltages
Component Checking
Transistors
Resistors
Crystal
Setting
••••••••••••••••••••••••••••••••••••••
Equipment
Isolation
and Waveforms
••••••••••••••••••••••••••••••••••
Oven
OF
CONTENTS
Maintenance
(cont)
••••••••
~
••••••••••••
.................................
••••••••••••••••••••••••••••••
•••••••••••••••••••••••••••••••
AIDS
Illustrations
TECHNIQUES
and
•••••••••••••••••••••••••••••••
•••••••••••••••••••••••••
••••••••••••••••••••••••
••••••••••••••••
Color
••••••••••••••••••••••••••
Codes
•••••••••••
•••••••••••••••••••
••••••••••••••••••••••••••••
Components
•••••••••••••••••••••••••••••
••••••••••••••••••••••••••
•••••••••••••••••••••
•••••••••••••••••••••••••
Integrated
••••••••••••••••
Circuits
(IC)
••••
5-1
5-1
5
....
5-2
5
....
5-2
5-2
5
...
5-2
5--2
5-3
5-3
5-3
5-3
5-5
5-5
5-5
5-5
5-6
5-6
5-6
1
2
2
Section
Section
Section
Section
PARTS
Ordering
6
OPTIONS
7
REPLACEABLE
8
DIAGRAMS
9
REPLACEABLE
ORDERING
AND
AND
•••••••••••••••••••••••••••••••••••
ELECTRICAL
CIRCUIT
MECHANICAL
REPLACING
PARTS
BOARD
PARTS
iii
•••••••••••••••••
ILLUSTRATIONS
5-8
5-8
067-1011-00
DSG
OPERATORS SAFETY SUMMARY
The general safety information
for
both operating and servicing personnel. Specific
is
warnings and cautions will be found
they
manual where
summary.
Terms
CAUTION statements identify conditions
could result in damage
WARNING statements identify conditions
that could result in personal
In
This Manual
apply, but may not appear in this
to
in
this part
the equipment
injury
or
of
throughout
or
or
other property.
loss of life.
Terms As Marked on Equipment
CAUTION indicates a personal
mediately accessible
to
hazard
DANGER indicates a personal
accessible
property including the equipment itself.
as
one reads the marking.
as
one reads the marking,
injury
hazard not
injury
hazard immediately
Symbols In This Manual
This symbol indicates where applicable
or
cautionary
found.
other information is
the summary
the
practices that
or
practices
im-
or
to
be
Grounding the Product
This product is grounded through the grounding conduc-
tor
of the power cord.
power cord
connecting
protective ground connection
conductor in the power cord is essential for safe operation.
into
to
the product
To
avoid electrical shock, plug the
a properly wired receptacle before
input
or
output terminals. A
by
way of the grounding
Danger Arising From Loss of Ground
Upon loss
accessible conductive
trols that may appear
electric shock.
of
the protective-ground connection, all
p~rts
(including knobs and con-
to
be insulating) can render
Use the Proper Power Cord
a
Use
only
the power cord and connector specified for your
product.
only
Use
For detailed information on power cords and connectors,
Jee Fig. 4-1.
Refer cord and connector changes
personnel.
a power cord that is in good condition.
to
qualified service
Use the Proper Fuse
an
Symbols As Marked on Equipment
~
DANGER -
High
voltage.
@ Protective ground (earth) terminal.
,&
Power Source
This product la Intended
that will not apply more than 250 volts rms between
supply conductors
and ground. A protective ground connection by way of
grounding
safe operation.
ATIENTION
or
conductor
- refer
to
between either supply
In
the
to
manual.
operate from a power source
power cord Is essential
conductor
the
the
for
To
avoid fire hazard, use only
voltage rating and current rating
list for your product.
Refer fuse replacement
to
the
fuse of correct type,
as
specified in the parts
qualified service personnel.
Do Not Operate In Explosive Atmospheres
To
avoid explosion,
explosive atmosphere unless
certified
for
such operation. ·
Do Not Remove Covers
To
avoid personal injury,
covers
covers and panels properly installed.
or
panels. Do not operate
do
not operate
or
do
this
it
has been specifically
Panels
not
remove the product
the
product without the
iv
product in
an
067-1011-00
DSG
SERVICE SAFETY SUM
FOR
Do Not
Do not perform internal service or adjustment of this
product unless another person
aid
Use
Dangerous voltages
To avoid
tions and components
Service Alone
resuscitation is present.
and
Care When
perso.nal
Servicing With Power On
exist
injury, do not touch exposed connec-
QUALIFIED
Refer also
capable
several points in this product.
at
power is
while
to
of rendering first
on.
SERVICE
the preceding Operators Safety
ARY
before
ONLY
removing protective panels,
operate from a power source
to
rms between the
volts
250
supply
conductor
essential for
PERSONNEL
Summary.
Disconnect power
soldering,
Power Source
This product is intended
that
supply conductors or between either
and ground. A protective ground connection by way of the
grounding conductor in the power cord is
safe operation.
or replacing components.
not apply more than
will
v
067-1011-00
DSG
1-1.
Digital
Sweep
vi
Generator.
067-1011-00
DSG
Product
The
support
Tektronix
Generator
Description
067-1011-00
the
Performance Check and Adjustment
1900
provides a 10-bit
digital-to-analog
compatible
Format
digital
test
an
D/A
signal.
A/D -D/A
alone.
separation
part
of
used
Detecto~,
in
analog
provide
television
equipment
with
for a Parallel
video
pair
Future
of
the
calibration
conjunction
the
frequency
NBS-traceable
generators,
(See
Digital
Digital
converter
the
proposed
interface,
The
Digital
to
make
digital
A/D
and
with
Digital
response
Fig.
2-11).
SECTION
1
SPECIFICATION
Sweep
Generator
(DSG)
procedures
Test
Signal
digital
(DAC)
·sMPTE
Interface
Generator.
data
or
any
standard
(System
signal
other
("Digital
M/NTSC),
generating a swept-frequency
D/A
Sweep
frequency
processing
frequency
Generator
permits
domain measurements on
equipment
response
characteristics
and performance check
a 1900 and
Sweep·
Generator
standard,
performance
waveform
an
015-0408-00
provides
and
verification
monitors,
is
part
and
is
designed
The
Digital
to
drive
video
DAC
Video
July,
1979)
sinewave
the
division
will
require
procedures.
Peak-to-Peak
an
NBS-traceable
of
an
effort
of
Tektronix
other
television
of
the
to
the
Sweep
1900
of
the
as
When
to
The
Digital
samples
stored
55.9
kHz
Digital
decreasing
OUTPUT
from
55.93
kHz
every
Sweep
per
second)
in
three
sinewave,
d~ta
representing
the
of
the
kHz
two
number
067-1011-00
to
lines
switched-variable
vary
DIGITAL
Digital
used
the
to
digital
DATA
Sweep
enable
OUTPUT
Generator
sync and
provides a BLACK
The
Digital
DIGITAL
signals
provides
sweep, and
Sweep
CLOCK
from
INPUT
the
identification
also
Generator
word
PROMs.
all
of
7.159
of
control
data
used
supplies
BURST
Generator
connector
1900
DIGITAL
provides
data
To
generate
256
words
higher
words
provides
MHz
active
also
to
provides
derived
per
in
each
video.
permits
generate a CW
10-bit,
from a
digital
stored
in
frequencies
sinewave.
digital
field
A
front-panel
an
non-composite
provides a BLANKING
burst
OUTPUT
insertion
to
which
may
be
which
the
locked
uses
by
the
OUTPUT. A separate
of
nominal
nominal
1-MHz
3.58
intervals
MHz
14.31818
cosine
data
the
PROMs
is
generated
The
data
by
to
increments
operator
signal.
digital
output
the
1900.
1900
may
to
the
TRS
and
4.43
MHz
(Mega
lookup
representing
are
used.
by
DIGITAL
DATA
sweep a
of
to
manually
Because
data,
which
be
1900
the
may
It
also
genlocked.
through
and Clock
MARKER
during
MHz
output
the
markers.
table
a
DAC
55.93
the
be
the
1-1
The
067-1011-00
circuit
(shown
indicator,
connectors
switched-variable
Digital
and
boards
in
Sweep
pinout
Fig.
two
for
of
Generator
the
Digital
and one
1-1).
25-pin
blanking,
D-type
frequency
proposed
067-1011-00
Sweep
large
The
markers,
conform
Generator
board
front
Digital
control.
SMPTE
DSG
consists
in a single-wide
panel
and
to
Standard.
includes
Data
blackburst
Digital
the
signal
connectors,
of
two
TM500
a
green
output,
interfaces
levels,
small
LED
three
and one
of
clock
package
power
bnc
the
rate,
1-2
067-1011-00
DSG
Performance
The
following
Digital
25
temperature
period
Characteristics
DIGITAL
Frequency Range
Format
Sweep
degrees
before
DATA
+-5
Conditions
electrical
Generator
degrees
between
performing
OUTPUT
O
characteristics
is
calibrated
C
and
is
operated
and
50
degrees
verification
Table
ELECTRICAL
Performance
Requirement
55.93kHz
in
55.93kHz
10-bit
are
valid
at
an ambient
at
a normal ambient
c.
Allow a 20-minute
tests.
1-1
CHARACTERISTICS
to
7.159MHz
increments
data
words
only
if
the
temperature
warm
Supplemental
Information
Field
CW
SMPTE
(Proposed
1979)
10-bit
Sweep
digital
Standard
parallel
signal.
of
up
or
.data
July,
Sample
Frequency
Voltage·
Driver
Dynamic Range
Clock
Levels
Impedance
14.31318MHz
+/-
100Hz
Digital
(Blanking)
Digital
(
100
Word
Word
IRE)
to
( 4
240
800
x
fsc),
10K
10K
balanced
balanced
ECL
ECL
1-3
067-1011-00
DSG
Characteristics
DIGITAL
CLOCK
Format
Voltage
Input
Levels
Impedance
BLANKING
Polarity
INPUT
Table
1-1
ELECTRICAL
Performance
Requirement
Jumper
(cont.)
CHARACTERISTICS
selectable
Supplemental
Information
SMPTE
(Proposed,
1979)TRS
10K
100
Standard
July
&
Clock
balanced
ohm,+/-5%
ECL
TTL-compatible
levels
Factory
high
set
during
for
bl
an
king.
Vertical
Horizontal
Blanking
Blanking
Line
Line
Line
Line
10.8
261,Field
Through
21
,Field
And
262,Field
Through
20,Field
microseconds
2
1
1
2
23
Lines
22
Lines
Digitally
from
clock
the
frequency.
Total
Total
derive
sample
d
1-4
067-1011-00
Table
ELECTRICAL
1=1
CHARACTERISTICS
DSG
(cont.)
Characteristics
MARKER
BLACKBURST
Mainframe
Interface
OUTPUT
Performance
Requirement
v@
1
@
v
1
v @
1
@
v
0.5
@
v
1
@
v
0.5
@
v
1
@
v
1
1.006747
2.013494
3.020241
3.579545
4.026988
4.418501
4.977805
5.984552
-,
MHz
MHz
MHz
MHz
MHz
MHz
MHz
MHz
Supplemental
Information
Marker
are
of
Amplitude
10%.
utility
A
for
Not
as
Sync 286mV,nominal.
Burst
TM500
Uses
location.
tween 6-7 and 23-24
as
family
Frequencies
multiples
55.93 kHz.
within
signal
genlock
shaped
test
a
286mV,nominal.
or
any
signal-source
a
plugin.
only.
for
signal.
TM5000.
single-wide
Keyed
use
be-
1-5
067-1011-00
DSG
Characteristics
Temperature
Operating
Storage
Altitude
Operating
Storage
Table
ENVIRONMENTAL
PHYSICAL
CHARACTERISTICS
Table
CHARACTERISTICS
1-2
Supplemental
0
degrees
-40
degrees
To
4,572
To
15,240 m
1-3
Information
C
to
C
to
m
(15,000
(50,000
+50
+65
degrees
degrees
feet)
feet)
C
C
Characteristics
Finish
Length
Width
Height
Net Weight
Net
Shipping
Weight
Information
Anodized aluminum
and
chassis.
cm
29.2
6.6
12.7
0.82
1.5
cm
cm
kg
kg
(11.5
(2.6
(5.0
(1.8
(3.3
in.)
in.)
in.)
lbs)
lbs)
side-panel
1-6
067-1011-00
DSG
section
This
indicators.
and
explanations,
Installation
Digital
The
received.
Power
module
module
Modules
instruction
operation.
describes
Following
and jumper
and Removal
Sweep
It
or
occur
Arcing
connectors
plug-in
Generator
operates
referred
the
Turn
removing
OPERATING
installation,
those
options.
Instructions
any
in
hereafter
to
manual
for
~J
power module
the
rear
the
at
reduces
and damage
circuitry.
SECTION
2
INSTRUCTIONS
operating
discussions
calibrated
(DSG)
DSG,
the
is
Tektronix
the
of
as
line-voltage
off
otherwise
interface
useful
may
are
"TM500".
requirements
before
arcing
connectors.
life
be done
of
controls,
example
ready
and
TM500
Refer
inserting
may
the
the
to
connectors
applications,
to
TM5000
or
the
to
and power
use
Series
power
when
plastic
Check
module
cutouts
special
Do
service
The
and 7
alignment.
between
insertion
compartment
When
lower
compartment and
interconnecting
when
for
not
TM500
at
the
guides
the
the
in
the
~n
interface
rear
insert
personnel.
power module
standard
the
The
pins
23 and
the
of
has
units
or
TM500
barriers
selected
circuit
DSG
plug-in
the
TM500
24.
DSG,
been
properly
are
selected
the
press
jack.
Power
the
on
compartments.
board
connections
until
MUST
barrier
Power
because
reserved
firmly
The
Module power
have a
location
Module
barrier
A
that
for
matched,
compartments.
seat
to
POWER
DSG
2-1
interconnecting
the
If
edge
this
connector,
for
has
barrier
may
any
in
barrier
other
align
the
indicator
switch
another
been
ensure
to
also
other
plug-ins.
circuit
is
barriers
they
type
verified
installed
proper
an
have
location
would
the
indicate
DSG
Insert
board
should
turned
jacks
do
may
of
between
optional
with
the
be
on.
power
the
of
match
not
indicate
instrument.
qualified
by
pins
connector
barrier
that
upper
into
the
preclude
the
the
will
the
DSG
in
illuminated
the
6
and
To
remove
release
connector
out
of
the
the
DSG,
latch,
disconnects
located
power module.
turn
067-1011-00
off
the
on
the
from
the
DSG
TM500
lower
power module.
Power Module and
left
corner
The
of
the
DSG
pull
DSG,
will
the
until
now
the
slide
Funotions
POWER
DIGITAL
CLOCK
DIGITAL
CLOCK
INT/EXT
DATA
ot
Controls, Connectors,
INPUT
OUTPUT
and
Indioators
A
green
in
Accepts proposed
and Clock
D-type
the
outside
Button
Sweep
produce
when
INPUT.
to
EXTernal
source
Generator
INPUT.
Provides
via a 25-pin
connector
video
LED
the
power
subminiature
Digital
source.
switch
Generator
the
not
using
Setting
to
10-bit
DAC.
indicating
supply.
information
Sweep
to
14.31818
the
allows
drive
through
D-type
to
drive
voltage
SMPTE
Generator
cause
to
the
the
the
14.31818
standard
via a 25-pin
connector
the
INTernally
MHz
clock
DIGITAL
button
an
outside
Digital
DIGITAL
MHz
subminiature
a SMPTE-compatible
to
to
Digital
CLOCK
switch
clock
Sweep
CLOCK
words
present
TRS
lock
an
signal
SINEWAVE H RESET
FREQUENCY
MANUAL/SWEEP
Button
line
to
Switched
control
represented
word
pulled
is
2-2
switch-to
of
horizontal
information
out.
generated
digital
variable
the
frequency
by
Normal sweep
when
phase-lock
sweep
sync.
control
the
DIGITAL
when
control
each
information
to
manually
of
the
sinewave
DATA
the
control
information
is
pushed
OUTPUT
is
in.
067-1011-00
DSG
Functions
BLANKING
MARKER
BLACKBURST
of
OUTPUT
Controls,
Connectors,
at
BNC
Sweep
conforms
Standard
intended
synchronizing
precision
and
Inicators
TTL-logic
to
indicate
time
In
this
sync and
1V
1-MHz
points
the
Composite
source
for
the
case
information
markers
intervals,
nominal
for
sweep mode.
connector
to
Generator.
(Cont.)
levels
to
an
composite
of
the
burst
black
genlock
to
in
to
standard.
insertion.
via a BNC
3.58
MHz
references
burst
to
the
RS170A
format
be used
signal,
via a BNC
outside
video
Tektronix
may
be.used
conector
and 0.5V markers
and
when
output
allow
to
the
This
only.
as a utility
not
connector
source
blanking.
4.43
using
an
outside
Digital
signal
EIA
Video
It
as
1900,
for
at
MHz
via
is
a
the
a
Jumper
J857
disables
J445
pin 2 to
MANUAL
All
with
section
Options
inverts
disables
FREQUENCY
of
these
the
the
pin
help
of
APPLICATIONS
BLANKING
nominal 1
the
3.
control.
jumpers can be found on
of
the
the
manual.
when
nominal
Removing J533
parts
MHz
jumpered
markers
3.58
location
will
and
2-3
when
4.43
pin 2 to
jumpered
MHz
markers
halve
the
illustration
the
Main
pin
3.
pin 2 to
when
resolution
Sweep
board (A1)
in
the
J447
foldouts
pin
3.
jumpered
of
the
067-1011-00
DSG
Frequency Response
The
Digital
the
frequency
example
response
the
Digital
signal
source
is
shown
is
Sweep
response
being
Sweep
as
measurements can be
detection
the
frequency
leaving
the
manual
Digitally
Fig.
2-1 shows a
Generator.
Digital
data
for
the
1900
following
jumper
The
Clock Source jumpers P532, P534, and
"Internal
technique.
only
for
Looking
The
Output.
the
to
drive
factory-set
P206
must be
Clock"
response
device-under-test
1900
Testing
Generator
in
Fig.
checked.
Generator
shown
made
the
015-0408-00
the
typical
external
The
Digital
Digital
the
in
positions
is
of
digital
2-1,
When
can
in
Fig.
even more
Using
DSG
of
the
the
to
application
clock
Input.
DSG,
the
manner:
the
"Remote
{pins
where
test
the
Sweep
intended
primarily
television
the
1900
used
with a high
also
2-2.
serve
Many
accurately
differential
signal
errors
generator
displayed,
Peak-to-Peak
1900
D.igital
of
the
is
being
provided
Generator
To
use
the
1900 must be
The
Digital
TTL"
position
P536
2-3).
for
checking
equipment.
DAC
frequency
quality
as
an
analog
frequency
response
using a differential
technique,
cancel
as
explained
Detector.
TRS
Digital
provides
External
configured
Data Source
must be
Sweep
by
the
(pins
digital
Clock from
in
Control
1-2).
in
An
DAC,
sweep
errors
out,
1900
the
the
in
in
Genlooking
Another
together
Generator,
BLACKBURST
on
the
and
the
the
way
is
and
OUT
back
Digital
needed.
Blanking
It
is
burst
Digital
for
possible
from
the
Sweep
1900
to
lock
to
use
genlock
of
the
of
the
Sweep
Composite
to
generate
1900. A
Generator
to
the
the
1900 and
the
internal
the
Digital
1900.
Generator
Sweep
cable
is
DSG
Blackhurst
the
oscillator
1900
to
the
Sweep
The
cable
DIGITAL
a composite
from
the
connected
2-4
Digital
of
DSG.
Generator
between
the
CLOCK
video
BLANKING
to
pins
Sweep
the
Generator
Digital
Connect
to
the
1900
INPUT
sweep
using
OUT
16
(hot)
Sweep
the
Program
Digital
is
no
longer
sync and
on
the
and 7 (Gnd)
In
Out
067-1011-00
DSG
Tektronix i 900
Digital Generator
Tektronix 175-3671-00
Interconnecting
Cables
"MARKER OUT" from Digital Sweep Generator
2-1.
SYNC
"COMP
Calibrating
015-0413-00
OUT" from 1900
the
1900
Peak-to-Peak
Detector Amp
015-0408-00
Detector
Head
to
the 7B53A MAIN TRIG
to
7A26 INPUT.
frequency
IN.
response.
Oscilloscope
Test
System
Tektronix
7603
D
7A13 7A26 7853A
i
3679-02
Tektronix 1900
Digital Generator
Tektronix 175-3671-00
Interconnecting
Cables
"MARKER OUT" from Digital Sweep Generator
2-2.
"COMP
Checking
Device Under Test
SYNC
OUT" from 1900
frequency
Detector
Head
015-0413-00
to
the
to
response
2-5
Peak-to-Peak
Detector Amp
015-0408-00
7B53A MAIN TRIG
7A26 INPUT.
of
device
Oscilloscope
D
7A13 7A26 7B53A
IN.
under
test.
Test
System
Tektronix
i
7603
3679-03
of
the
Sweep
mode
during
Digital
back
to
VITS.
Remote
Generator
sweep
Sweep
the
internally-generated
Control
to
Generator's
input
switch
time.
067-1011-00
on
the
the
1900
During
non-sweep
blanking,
information
DSG
1900.
to
the
time,
This
allows
external
as
defined
the
1900
for
digital
is
sync,
the
Digital
by
the
switched
burst,
input
and
Picture
With a
picture
(see
Generator
terminate
Sinewave
Provision
sinewave
output.
with
should
phase
sinewave
frequency
sinewave
wave
where
same
leaving
point.
as
Tektronix
Figs.
a
picture
be
discontinuity
gets
the
part
shown
Monitor
monitor,
2-3
can
the
Horizontal
is
outputs
Both
locked
frequency
(Figs.
looks
abruptly
frequency
of
a change
SINEWAVE
in
Testing
and
be added
MARKER
made
are
monitor
on a
the
Figs.
1900
in
resolution
2-4).
into
output
Reset
on
the
to
horizontal
useful
in
to
horizontal.
on
the
is
not
2-5
and
scope,
reset
will
sweep
in
H
signal
frequency
RESET
2-7
and
the
signal
of
the
The
MARKER
the
picture
in
this
Digital
or
depending
evaluation
output
an
integer
2-6).
in
in
also
on
2-8.
Fig.
the
phase
be
with
being
causes
path
picture
output
via
case.
Sweep
to
Locking
sinewaves,
SINEWAVE
at
changing.
Generator
allow
on
the
of
resolution,
multiple
2-5
the
SINEWAVE
the
only
additional
between
monitor
of
the
free-running
application.
to
horizontal
shows
H
trailing
Fig.
H
the
the
A-B
to
however,
of
the
how
RESET
2-6 shows
RESET
change
spectral
DSG
may
Digital
mode.
lock
the
since
horizontal
the
mode.
edge
of
disabled,
at
components
and a
be checked
Sweep
Do
not
the
sinewave
For
use
output
creates
The
blanking,
that
a
the
sine-
the
When
display
and
the
pure
VITS,
detector
using
2-10.
Digital
sweep
etc.)
the
is
obtained
It
should
Sweep
information
will
output.
sweep
Generator
cause
generator
with
H
be
noted
(SINEWAVE
noise
with
RESET
that
and a
and/or
off
H
2-6
when
DAC,
RESET,
a
detector,
(out)
distortion
as
using
anything
Blanking,
a
cleaner
shown
a
detector
other
in
the
output
in
Figs.
with
than
Markers,
resultant
2-9
067-1011-00
DSG
3679·04
2-3.
A
composite
by
the
1900;
video
displayed
frequency
on
sweep
a
picture
with
monitor.
sync
and
burst
being
inserted
2-4.
Frequency
sweep
with
sinewave
2-7
H-Reset
ON,
viewed
on
3679-05
picture
monitor.
067-1011-00
DSG
2-5.
Frequency
sinewave
output.
incrementation
H-Reset
ON,
at
with
DAC
3679·06
3679·08
2-6.
Frequency
sinewave
output.
incrementation
H-Reset
OFF,
at
3679·07
with
DAC
3679·09
2-7.
Spectrum
sinewave
frequency
DAC
of
H-Reset
output).
output
(single
ON
with
2-8
2-8.
Spectrum
sinewave
frequency
DAC
of
H-Reset
output).
output
OFF
with
(single
1
::.'
...
t
Markers
The
Digital
identification
markers
0.5V
4.43
MHz
points.
Sweep
of
are
Generator
nominal
provided
067-1011-00
provides
1-MHz
in
intervals
the
same
DSG
1V
marker
output
during
at
outputs
the
nominal
for
sweep.
3.58
and
Fig.
measurement
setups.)
of a dual
displayed
overdrive
Harmonics
Digital
accuracy
output
point
analog
DAC
output.
frequencies.
the
are
converter.
2-11 shows
The
of
data
and
from a
is
rounded
sample
nonlinearities
Different
reconstructed
strongly
markers
application.
markers
channel
in
the
other
recovery
The
MARKER
Digital
generated
resolution.
digital
to
may
Taking
dependent
being
(See
are
displayed
oscilloscope,
channel
capabilities.
output
OPERATING
Sweep
by
the
This
to
analog
the
nearest
have an
will
digital
analog
all
also
these
signal
on
error
words
the
used
NOTE
should
CONSIDERATIONS
Digital
contribute
quality
in a frequency
Figs.
while
through
provides
converter.
discrete
of
factors
will
through
not
up
are
2-1
the
an
Sweep
to
used
into
typically
of
or
sweep
amplifier
be
1024
level.
1/2048
to
to
the
response
2-2
for
one
vertical
amplitude
terminated.
Generator
possible
Every
errors
generate
account
digital
analog
Therefore,
of
full
in
be 60
equipment
channel
is
having
has
levels
the
different
harmonics
dB
to
good
10-bit
sample
every
scale.
analog
down
analog
of
of
but
ECL
Data
Transmission
uses
speed
receiver.
viewed
characteristic
Transmission
differential
and
noise
Due
as a transmmission
of
digital
ECL
margin
to
the
impedance
data
(emitter-coupled
when
speed
received
of
line
at
the
from
.ECL
and
receiving
the
signals,
should
2-9
Digital
logic).
by a
Sweep
This
differential
the
cables
be
terminated
end.
ECL
Generator
offers
ECL
must be
with
gate
outputs
good
its
067-1011
...
00
DSG
2-9.
Detector
H-Reset
output
ON.
with
sinewave
3679-10
2-10.
Detector
H-Reset
output
OFF.
3679-12
with
3679-11
sinewave
2-11.
Use
of
the
marker
2-10
output.
067-1011-00
DSG
also
ohm)
lines.
NBS
calibration
attaining
digital
Fixture
low
W5F
with
require
system
1900
transmitting
the
the
at
Traceability
067-1011-00
The
traceability
voltmeter
are
frequency
Waveform
015-0408-00
the
traceable
and
response.
frequency
approach
to
pulldown
provides
end, and
receiving
Digital
fixtures
television
for
traceability
NBS
transfer
amplitude
Monitor.
measurement
Combining
response
establishing
resistors.
pulldown
end
Sweep
which can be used
the
and
standards
measurements
The
Peak-to-Peak
the
measurements
resistors
termination
the
of
Generator
signal
illustrated
is
067-0916-00 Video Amplitude
to
Digital
1900
of
frequency
low
accurate
Digital
The
(typically
resistors
interface
ECL
is
to
measurements.
allow
Detector
Digital
yields
video
accurate
with
Sweep
Generator
measurements
a complete
amplitude
Sweep
transmission
part
provide
Fig.
in
Tektronix
a
system
Test
Signal
Generator/
ohm)
510
(typically
of
set
a
of
NBS
path
The
2-12.
and
in
allows
with
systematic
measurements.
A
Calibration
traceable
1485
conjunction
accurate
Generator
the
at
100
for
MOD
high
2-11
NBS or other
Recognized
Standards
Digital
Voltmeter
067-1011-00
DSG
',
067-0916-00
Amplitude
Video
Calibration
Fixture
,,
015-0408-00
Peak
to
Peak
Detector System
,,
1485 Mod W5F
Waveform
Monitor
,,
1900
Digital
Generator
067-1011-00
Digital Sweep
Generator
Other Television
and Measurement
Equipment
Teat
2-12.
traceability
NBS
3679-13
explanation.
2-12
067-1011-00
DSG
General
067-1011-00
The
boards:
board
will
Part
Circuit
The
circuit
addresses
block
internal
external
a
horizontal
sinewave
integrated
step
In
an
the
from
Each
(main
talk
will
2
Overview
Digital
to
diagram.
digital
through
manual
analog
cosin.e lookup
the
these
of
Crystal
the
board),
about
talk
Sweep
drive
a
for
crystal
clock
timing
output.
frequency
to
cosine
block
addressing
circuit.
the
digital
functions
THEORY
Calibration
Oven
the
and
main board and
the
about
Generator
a sweep
cosine
The
oscillator·
signal.
Blackburst
cosine
table.
lookup
the
lookup
14-MHz
also
used
The
lookup
operation
converter
table
will
SECTION
OF
Fixture
board,
Switching
switching
uses
control
table.
clock
or
includes
timing
The
determine
to
is
sweep
a
Digital
for
now
3
OPERATION
consists
Digital
the
Power Supply
the
power
14-MHz
a
circuit
Figure
be
may
from an
provision
block
generated
control
front
set
output
either
discussed
be
in
panel
the
table
to
of
Sweep
crystal
supply.
clock
which
3-1 shows a
derived
external
for
provides
sweep
the
by a sync
generates
cosine
the
control
address
data
sweep
can
or
in
three
oven
and countdown
generates
from
source.
locking
addresses
CW
detail.
circuit
Generator
board.
board,
simple
either
The
to
vertical
frequency
generator
generator.
used
is
increment
derived
then
be
output.
Part
and
an
TRS,
and
and
to
with
for
Internal
internal
The
at
the
point
buffer
Q787.
operation
cir.cuit
Proper
de
test
board A1).
selectable
U599D
Lock
14-MHz
junction
available
is
Oscillator
center
to
the
PART
clock
crystal
The
the
of
of
oscillator
1:
is
oven
Q3130
at
frequency
C793
in
SWEEP
THE
generated
Y3016
indicated
is
thermistor
and
J675
(from
its
output.
3-1
GENERATOR
by
oven
in
is
the
adjusted
is
adjustment
crystal
the
control
to
approximately
by
RT3101.
side
back
c793.
by
range.
oscillator
stability.
external
An
the
of
C788
Q799
and
14.3
main
is
V
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