Tektronix 7D01 User manual

Tektronix, Inc .
P.O . Box 500
Beaverton, Oregon

97077
070-2206-02
Product Group 57
IN
COMMITTED TOEXCELLENCE
CHECK FOR
CHANGE INFORMA
F THIS MANUAL .
(Serial No .
I°

I
00000 and
up)
N
Serial Number
ION
MANUAL
.
First
Printing OCT 1976
Revised OCT 1982

LIST OFILLUSTRATIONS
... ................... .
ii
LIST OF TABLES
............ ............... .
ii
SAFETY SUMMARY
SECTION 1 GENERAL
INFORMATION
INTRODUCTION ............. . . .........
1-1
GLOSSARY
.................. . ........
1-1
INSTALLATION
.............. ... .......
1-1
PACKAGING FOR
SHIPMENT ..........
. .....
1-2
SPECIFICATION ..
. ................
. ...... 1-3
S'T'ANDARD ACCESSORIES
............... .... 1-
9
SECTION
2 OPERATING
INSTRUCTIONS
FRONTPANEL CONTROLS,
CONNECTORS AND
INDICATORS
.......... . . 2-1
DETAILED OPERATING
INFORMATION
.......... 2-1
AUXILIARY
FUNCTIONS
... . . ............
2-1
INTERNAL
STRAP SELECTIONS
.
.... ........ 2-4
SIGNAL
CONNECTIONS
........ .... ......
2-6
DISPLAYING DATA
................
. ....
2-7
TRIGGERING
..... . . ..............
. . . . 2-7
CLOCK QUALIFIER
OPERATION
........ . . . .
2-8
ASYNCHRONOUS
AND SYNCHRONOUS
DATA SAMPLING
.

. . . . ............
2-9
OPERATIONAL ANALYSIS

................
2-10
APPLICATIONS ...........
. .............. 2-13
INTRODUCTION ................ 
, .
.2-13
FAULT' IDENTIFICATION
...... . . . ........ 2-13
DELAY BY WORDS

............. ........ 2-13
DELAY BY EVENTS ............... .
. .... 2-14
STATE TABLE AND MAPPING
DISPLAYS
. . .... 2-14
MICROPROCESSOR
ANALYSIS .......... ....
2-16
STORAGE BUFFER
ANALYSIS ............
. .

-2-17
FUNCTIONAL CHECK

...................
2-17
REV B, APR 1979
PAGE
THE
REMAINING PORTION
OF THIS TABLE
OF CON-
TENTS LISTS THE
SERVICINGINSTRUCTIONS
. THESE
SERVICING
INSTRUCTIONS ARE FOR USE
BY QUALI-
FIED
PERSONNEL ONLY .
T O AVOID
ELECTRICAL
SHOCK, DO NOT PERFORM
ANY SERVICING
OTHER
THAN
THAT CALLED OUT
IN THE OPERATING
IN-
STRUCTIONS UNLESS QUALIFIED
TODO SO .
SECTION
3 THEORY OF OPERATION
BLOCK DIAGRAM DESCRIPTION
............... 3-1
DETAILED CIRCUIT DESCRIPTION
. ............. 3-3
FRONT
PANEL WIRING .... . ..
. ........... 3-3
WORD
RECOGNIZER ..........
. . ......... 3-3
MEMORY ................
. . . . . ....... 3-4
TRIGGER ..................
. ......... 3-7
TIMEBASE .....................
. . . . . . 3-9
VERTICAL
OUTPUT
.....................
3-9
HORIZONTAL
OUTPUT ..................
3-10
CURSOR ... . ........................
3-10
POWER SUPPLIES
. .....................
3-12
SECTION
4 MAINTENANCE
PREVENTIVE
MAINTENANCE ................. 4-1
CLEANING ....... . . . .................
4-1
VISUAL
INSPECTION ... . . . .
. . . . ..........
4-1
LUBRICATION
............
. . . . ......... 4-1
SEMICONDUCTOR
CHECKS ....... ..........
4-2
TROUBLESHOOTING
...............
. .......
4-3
TROUBLESHOOTING
EQUIPMENT .... ...
. .... 4-3
- TROUBLESHOOTING
TECHNIQUES
....... . . . . 4-3
CORRECTIVE
MAINTENANCE ..............
. . . 4-7
OBTAINING
REPLACEMENT PARTS ...........
4-7
SOLDERING
TECHNIQUES ................. 4-7
COMPONENT
REMOVAL AND REPLACEMENI
...... 4-8
ADJUSTMENT
AFTER REPAIR ..............
4-14
SECTION 5 PERFORMANCE
CHECK AND
ADJUSTMENT
PRELIMINARY
INFORMATION
. .............. 5-1
TEST EQUIPMENT
REQUIRED . . .
... ......... 5-1
PRELIMINARY
PROCEDURE
. . . . . . . ......... 5-3
PERFORMANCE
CHECK AND
ADJUSTMENT
PROCEDURE
................
. . ..... . . . 5-4
SECTION 6
REPLACEABLE ELECTRICAL
PARTS
SECTION 7
INSTRUMENT OPTIONS
7D01 Instruction (SN
B020000 & up)
SECTION 8 DIAGRAMS
AND CIRCUIT BOARD
ILLUSTRATIONS
SECTION 9 REPLACEABLE
MECHANICAL PARTS
CHANGE
INFORMATION
PAGE

71301 Instruction (SN B020000 & up)
FIGURE
NO .

PAGE
Frontis-
piece

71301 Logic Analyzer . .

............. . . .
.iv
1-1

71301 Dimensional Drawing .....

..... . .
.1-8
2-1

Front-panel
controls, connectors, and
indicators . .

.... .... . . . . . .
.2-2
2-2

Internal Display Clock Source and
Full Display/First
Trigger Selectors . . . .... ... .2-4
2-3

Internal
Signal
Selector
. .

.... . . . . . ..... .2-5
2-4

Pin assignments
for
Data Out
connector J120 . .

. .

.

... ........ .2-6
2-5

Suggested
methods for terminating
data outputs
from Data
Out
connector
J120 .

. . .

............ .2-7
2-6

Suggested
method for assembling a
remote Manual
Reset button ............. .2-7
2-7

Typical channel 0 to 15 pretrigger
data display ...... .

.

........... .2-8
2-8

Equipment
setup and displays for
finding a data fault and examining it
on an
analog display .

.

.......... .2-14
2-9

Equipment setup and data display
window that has been positioned after
a preselected word has occurred 25 times ...... 2-15
2-10

Equipment setup and display window
that has been positioned after 10,500
2-15
2-16
2-17
.3-2
.3-3
.3-5
LIT

I LLU ,ATI N
FIGURE
NO .

PAGE
3-4

Latch Clock timing for
4-channel
operation .

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

. 3-5
3-5

Latch Clock timing for 8-channel
operation . . . . . . . . . . ..............
.3-6
3-6

Memory Selector
timing for 4-channel
operation (display time
only)
....

........
.3-6
3-7

Memory Selector timing
for 8-channel
operation (display time
only)
.

. .

.......
.3-6
3-8

Binary output of U628
versus channel
displayed .....

...

........ .
.3-9
4-1

Lubrication
procedure for a typical cam
switch . .

.............. . . ..
.4-2
4-2

Circuit board locations ...

.

.... . . .
. .4-5
4-3

Power
supply
+5 volt test point location ..... . . .4-6
4-4

Location of securing
screws on the
Memory circuit board
.

..... . . . . . . .4-8
4-5

Multi-pin connector and P number
orientation
for the Memory circuit board . . . . . . .4-9
4-6

Location of securing
screws on the
Interface circuit board .....

. . . . . . ... . 4-10
4-7

Locations of securing screws on the
Output
circuit board ......

. . . . . . . 4-10
4 .8

Locations of securing screws and shield
on the Power Supply board . . ........ ....
4-11
4-9

Locations of securing screws on the
Cursor circuit board . .

. . ...

. . .....
4-11
4-10

Locations of hex nuts and screws on
front
sub panel which secure the Word Recog-
nizer circuit board
.

.......... 4-12
4-11

Exploded view of
circuit-board pin
and ferrule .... ..... . . . . . ..........
4-14
The illustrations in
Section 8 are located near their associated
Diagrams on the foldout pages
.
REV . A, MAR 197 7
2-11
clock pulses have occurred .. ...........
Typical setup for troubleshooting a
microprocessor system
.. ... .........
2-12 Typical setup
and display for trouble-
shooting a storage
buffer ................
3-1 71301 Block Diagram ............
3-2 Equivalent
circuit for one channel of
P6451
Data Acquisition Probe . ........ .
3-3
Truth
Table
for Store/Display Clock
Gate . ........................ . .
LIST
TABLE
NO .
1-1 Electrical
Characteristics .. .... . . . . ......
1-2 Environmental Characteristics ...... ........
1-3
Physical Characteristics ..... .. ...........
2-1 Format Output
Levels . .
.
.......
2-2 Minimum Clock Pulses Required to Display
Data (After the MANUAL RESET Button is
Pressed)
........... . . ... . .........
PAGE
............... 2-10
.............. .
.4-6
...............
.5-1
...............
.7-1
GE
TABLE
NO .
.1-3 2-3 Operational Analysis ....
.1-8 4-1 Power Supply Tolerances .
.1-8 5-1 `test Equipment ......
.2-1 7-1 Option Information Locat
.2-9

LIST OFILLUSTRATIONS ... . . . . . . ..............
ii
LIST OFTABLES ........ . . . . . . . . . . . . . .......
ii
SAFETY SUMMARY ..... . ... . . . . ., ., . ., ....
.iii
SECTION
1 GENERAL INFORMATION
INTRODUCTION ............. . . .....
....
1-1
GLOSSARY .................. . . . . . . ... 1-1
INSTALLATION
.............. . . . . . . . ... 1-1
PACKAGINGFOR
SHIPMENT .......... . . . ... 1-2
SPECIFICATION
................. . . ....... 1-3
STANDARD ACCESSORIES ..........
.... . .... 1-9
SECTION 2 OPERATING INSTRUCTIONS
FRONT PANEL CONTROLS,
CONNECTORS AND INDICATORS ........
.... 2-1
DETAILED OPERATING INFORMATION
...... . . . . 2-1
AUXILIARYFUNCTIONS
............... . . 2-1
INTERNAL STRAP SELECTIONS
............. 2-4
SIGNAL CONNECTIONS . . ................
2-6
DISPLAYING DATA
......... . . .......... 2-7
TRIGGERING ................. . .
...... 2-7
CLOCK QUALIFIER OPERATIO ......
. ..... 2-8
ASYNCHRONOUSAND SYNCHRONOUS
DATA SAMPLING ..................
. . . . 2-9
OPERATIONAL
ANALYSIS

........ . ..
. .... 2-10
APPLICATIONS
.................... .
... . . 2-13
INTRODUCTION .................
. . . ... 2-13
FAULT
IDENTIFICATION ..............
. . .
2-13
DELAY BY
WORDS

...................
. . 2-13
DELAY
BY EVENTS .....................
2-14
STATE TABLE AND
MAPPING DISPLAYS ...... 2-14
MICROPROCESSOR
ANALYSIS .............. 2-16
STORAGE
BUFFER ANALYSIS .............. 2-17
FUNCTIONAL CHECK

................... 2-17
REV
C JUN 1980
'THE REMAININGPORTION
OF THIS TABLE OF CON-
TENTS LIS'T'S THE
SERVICINGINSTRUCTIONS . THESE
SERVICING
INSTRUCTIONS ARE FOR USE BY QUALI-
FIED PERSONNEL ONLY . T
O AVOID ELECTRICAL
SHOCK, DO NOT PERFORM
ANY SERVICING OTHER
THAN THAT CALLED OUT IN THE
OPERATING IN-
STRUCTIONS UNLESS QUALIFIED TO
DO SO .
PAGE
7D01
Instruction (SN B020000
&
up)
SECTION
3
THEORY
OF OPERATION
BLOCK DIAGRAM DESCRIPTION .... . . ......... 3-1
DETAILED CIRCUIT DESCRIPTION . . . ... ........ 3-3
FRONT PANEL
WIRING . . . . .... . . ......... 3-3
WORD RECOGNIZER
...... . . . . .... . . .... . 3-3
MEMORY
............. ........ ...... . 3-4
TRIGGER ......... ... . . . . . . . ........
. 3-7
TIMEBASE ........... . . . . . . . ... ..
.... 3-9
VERTICAL OUTPUT

....... . .... .... . . .
. . 3-9
HORIZONTAL OUTPUT . . . . . . . . ... .... . . . 3-10
CURSOR .................. . . . ....... 3-10
POWER SUPPLIES ........... ..... . .....
3-12
SECTION 4 MAINTENANCE
PREVENTIVE MAINTENANCE ..... . . . . . ....... 4-1
CLEANING ........... 4-1
VISUAL INSPECTION ................. . .
. .
4-1
LUBRICATION ................. ... . ...
.
4-1
SEMICONDUCTOR CHECKS ........... . . ... . 4-2
TROUBLESHOOTING .................. . .... 4-3
TROUBLESHOOTING EQUIPMENT ........
. ...
4-3
TROUBLESHOOTING TECHNIQUES ........... 4-3
CORRECTIVE MAINTENANCE ................. 4-7
OBTAINING REPLACEMENT PARTS ...........
4-7
SOLDERING TECHNIQUES ................. 4-7
COMPONENT REMOVAL AND REPLACEMENT ..... 4-8
ADJUSTMENT AFTER REPAIR .............. 4-14
SECTION 5
PERFORMANCE CHECK AND ADJUSTMENT
PRELIMINARY INFORMATION ..............
5-1
TEST
EQUIPMENT REQUIRED ............... 5-1
PRELIMINARY
PROCEDURE ....... .

.... .
.5-3
PERFORMANCE
CHECK AND ADJUSTMENT
PROCEDURE ......................... . 5-5
SECTION 6 REPLACEABLE
ELECTRICAL PARTS
SECTION 7 INSTRUMENT
OPTIONS
SECTION 8
DIAGRAMS AND CIRCUIT BOARD
ILLUSTRATIONS
SECTION 9 REPLACEABLE
MECHANICAL PARTS
CHANGE INFORMATION
PAGE

7D01
Instruction (SN B020000 & up)
TABLE
NO .
LIST
. . . ...
.iv
....,
.1-8
. . . . .
.2-2
. . . . . .2-4
. . ...
.2-5
..... .2-6
2-5

Suggested methods for terminating
data outputs from Data Out connector
J120 .

...

...... ....
..
.2-7
2-6

Suggested method for assembling a
remoteManual Reset button ........ .... . .2-7
2-7

Typicalchannel 0 to 15 pretrigger
data display ....

.

.

....... . ... .2-8
2-8

Equipment setup and displays for
finding a data fault and examining it
on an analog display .

.......... . 2-14
2-9

Equipment setup and data display
window that has been positioned after
a
preselected word has occurred 25 times ......
2-15
2-10

Equipment setup and display window
that has been positioned
after 10,500
clock pulses have occurred . .

...........
2-15
2-11

Typical setup for
troubleshooting a
microprocessor system . .

...

......... 2-16
2-12

Typical setup and display for trouble-
shooting a storage buffer ................
2-17
3-1

7D01 Block Diagram . . .

........ .3-2
3-2

Equivalent circuit for one channel of
P6451 Data Acquisition Probe .

......... .3-3
3-3

TruthTable for Store/Display Clock
Gate . .... .... . . ............... .3-5
LIST
1-1

Electrical Characteristics . .

..............
1-2

Environmental
Characteristics ............. .
1-3

Physical Characteristics .......,.....,.,. .
2-1

FormatOutput Levels .

.

......
2-2

Minimum
Clock Pulses Required to . Display
Data
(After the MANUAL RESET' Button is
Pressed) ...... .. ..................
FIGURE
PAGE
NO .
P
3-4

Latch Clock timing for 4-channel
operation . .

. .

.... .,..,.

. 3-5
3-5

LatchClock timing for 8-channel
operation .....

. .

....... .3-6
3-6

Memory Selector timing for 4-channel
operation (display time only) .

. .

....... .3-6
3-7

Memory Selector timing for 8-channel
operation (display time only) .

. .

,.,.... .3-6
3-8

Binary output of U628 versus channel
displayed .....

...

. . . . ..... .3-9
4-1

Lubrication procedure for a typical cam
switch . .

.............. . . . . .4-2
4-2

Circuit board locations ...

.

.

.... . . . . .4-5
4-3

Power supply +5 volt test point location . . . . . . . .4-6
4-4

Location of securing screws on the
Memory
circuit board .

......... . . .4-8
4-5

Multi-pin
connector and P number
orientation for the Memory circuit board ...... .4-9
4-6

Location
of securing screws on the
Interface circuit board .....

.......... 4-10
4-7

Locations of securing screws on the
Output circuit board ......

.......
4-10
4-8

Locations of securing screws and
shield
on the Power Supply
board
. .

..........
4-11
4-9

Locations of securing screws on the
Cursor circuit board . .

.....

....... 4-11
4-10

Locations of hex nuts and screws on front
sub panel which secure the Word Recog-
nizer circuit board .

.......... 4-12
4-11

Exploded view of circuit-board pin
and ferrule
........................ 4-14
The illustrations
in Section 8 are located near their associated
Diagramson the foldout pages
.
PAGE
.
es
.
ca
REV . A, MAR 1977
PAGE
................
2-10
................ .4-6
................ .5-1
or ............... .7-1
FIGURE
NO .
Frontis-
piece 7D01 Logic Analyzer .. .... . . . . . .
1-1 7D01 Dimensional Drawing ..... . . .
2-1 Front-panel controls, connectors, and
indicators . . . . . . . . . .
2-2 Internal Display Clock Source and
Full Display/First Trigger Selectors .....
2-3 Internal Signal Selector .. ...... . . .
2-4 Pin assignments for Data Out
connector J120 .. .. .... .
GE
TABLE
NO .
.1-3 2-3
Operational Analysis . .
.1-8 4-1 Power
Supply Toleran
.1-8 5-1 Test
Equipment ....
.2-1 7-1
Option Information L
.2-9

Ground
the
Instrument
Do Not Operate in Explosive Atmosphere
Avoid Live Circuits
Do Not Service or Adjust Alone
AFETY
WARNING I
71301 Instruction (SN B020000 & up)
The following safety information is provided to ensure safe operation of this instrument . WARNING information is intended
to protect the
operator
; CAUTION information
is
intended
to protect the instrument .
The following
are
general
safety
pre-
cautions that must be observed during all phases
of
operation and maintenance .
To reduce electrical-shock hazard, the mainframe (oscilloscope) chassis mustbe properly grounded . Refer to the mainframe
manual for grounding information .
Do not operate this instrument in an area where flammable gases or fumes are present . Such operation could cause an
explosion .
Electrical-shock
hazards are present
in
this instrument . 7 - he protective instrument covers must not be removed by operating
personnel . Component
replacement and internal adjustments must be referred to qualified service personnel .
Do not service
or
make internal
adjustments to this instrument unless another person, capable of giving first aid and resusci-
tation, is present
.

7D01 (SN B020000 & up)
7D01 FEATURES
2206-1
The 7D01 Logic Analyzer will store and display up to 16
channels of digital data when installed in a 7000-series mainframe
.
The cursor function provides an intensified zone on the data display,
and a corresponding numerical readout display shows
the logic state (1 or 0) for each displayed channel of data . The position of the
cursor, relative to the trigger, is also displayed
on the crt readout . Cursor readout is displayed in either 3-bit or
4-bit bytes .
Digital data can be stored in 3 formats :

4
channels at
1016 bits/channel, 8 channels at 508 bits/channel, or 16 channels at
254 bits/channel . The sample rate is selectable from 10
nanoseconds to 5 milliseconds/sample (in a 5-2-1 sequence) when
using the internal time base, or can be used with an external clock signal
(up to
50
megahertz) .
The7D01 can be triggered from 4 sources : channel 0 data, an
external signal, a built-in 16-channel word recognizer, or
man-
ually . The triggered data can be produced following the trigger
(POST TRIG), centered around the trigger (CENTER), or pre-
ceeding the trigger (PRETRIG) . The input
threshold can be varied from minus 12 volts to plus 12 volts, or set to plus 1 .4
volts for TTL logic levels .
The Word Recognizer
produces
an output
when the logic states of the 16 input data channels match
the states of the corres-
ponding Word Recognizer switches . Two qualifier inputs are also provided to enable
the Word Recognizer output . The Word
Recognizer operates in either the synchronous or
asynchronous mode . A variable filter (to at least 300 nanoseconds) allows
rejection of brief
false-trigger signals .

The 7D01 Logic
Analyzer will store and display
up to 16 channels of digital
data when installed in a 7000-series
mainframe .
The
cursor function provides an intensified
zone on the data display, and
a corresponding numerical readout
display shows
the logic state
(1 or 0) for each displayed
channel of data . The position of
the cursor, relative to the trigger, is
also displayed
on the crt
readout . Cursor readout is displayed
in either 3-bit or 4-bit bytes .
Digital data can
be stored in 3 formats :

4
channels at 1016 bits/channel,
8 channels at 508 bits/channel,
or 16 channels at
254 bits/channel
. The sample rate is
selectable from 10 nanoseconds
to 5 milliseconds/sample (in
a 5-2-1 sequence) when
using
the internal time base, or can
be used with an external clock signal (up
to 50 megahertz) .
The 7D01
can be triggered from 4 sources
: channel 0 data, an external
signal, a built-in 16-channel word
recognizer, or man-
ually . The
triggered data can be produced
following the trigger (POST
TRIG), centered around the
trigger (CENTER), or pre-
ceeding the
trigger (PRE TRIG) . The input
threshold can be varied
from minus 12 volts to plus 12
volts, or set to plus 1 .4
volts for TTL logic
levels .
The Word Recognizer
produces an output when the
logic states of the 16 input data
channels match the states of the corres-
ponding
Word Recognizer
switches . Two qualifier inputs are
also provided to enable the
Word Recognizer output . The Word
Recognizer
operates in either the synchronous
or asynchronous mode . A
variable filter (to at least 300
nanoseconds) allows
rejection of brief
false-trigger signals .
iv
7D01 (SN B020000 & up)
7D01 FEATURES
REV B,
JAN 1979

The 7D01 is calibrated and ready to use when received . It is designed to occupy a vertical and horizontal
plug-in compartment in all 7000-series mainframes with readout except the 7104, which may suffer crt
damage that will not be covered by the instrumentwarranty, and the Digital Processing Oscilloscope (DPO),
which will not digitize the 7D01 outputs . There are some . . . .
azMwarIturOEXCEUFNce

Date : ___
Product : __
7D01__ Q .

C ANAL Y I R
4-22-81
IN
ION
Change Reference :
Manual Part No . : , . .--------
Q7_Q72Z0fa-02 . . .__

71301 Operator's
Manual
The Operator's manual
contains the information
necessary
to operate the 7001
Logic Analyzer . The manual
is divided
into three sections, each
covering a specific topic of the
instrument . Section 1
provides a basic description of
the
7001, a glossary of logic
terms, installation
instructions,
and
specifications . Section 2
contains operating information
for the
instrument . Information
concerning available op-
tions for
the 7001 is on a tabbed
page in Section 3 .
7001
Instruction Manual
The Instruction
manual provides operating
and servicing
information for
the 7001 Logic Analyzer . The
manual is
divided into ten sections .
Operating information is
covered
in
the first two sections ; servicing
information is contained
in
the remaining eight sections of
the manual . Schematics
are
located at the rear of the
manual and can be unfolded
and used
for reference while reading
other parts of the
manual . The reference designators
and symbols
used on the
schematics are defined
on the first page of the
Diagrams
section . Abbreviations used
in the manuals, except in
the
parts list and
schematics, comply with the American
National Standards Institute
Y1 .1-1972 publication . The
parts
lists are computer printouts
and use computer-
supplied
abbreviations .
CPU-Central
Processing Unit
.
ECL---Emitter-Coupled
Logic .
REV
OCT 1982
INTRODUCTION
GLOSSARY
The terms listed
in this glossary are
used throughout
this
manual .
Asynchronous-Multiple
digital information
transferred at
non-common clock rates
.
Bit---The
smallest increment
of digital information .
Jitter--A form of distortion
in asynchronous
systems that
is due
to timing variations
of the received data
.
Multiplexing--The
combining of
multiple inputs into
a
single
output .
Parallel-to-Serial
Conversion--The technique
of storing a
digital pattern from
a parallel bus, then
transferring that
pattern
out to a serial bus
.
N ~ All
ON
Parity
Bits--Bits added to the data
stream which enable the
receiver
to verify whether
the data is correctly or
incor-
rectly
received .
PROM .
-Programmable ReadOnly
Memory .
RAM-Random
Access Memory .
Serial Data-Data
transferred on
a single line . Serial data
logic
is derived in a
sequential mode .
Store
Clock---The clock used
to store information
into the
7001 memory .
Synchronous--Digital
information transferred
with the
same clock reference .
Threshold Voltage--The
comparator input
voltage on the
inverting input,
which is used as
a reference . Thus,
if the
signal on the
non-inverting input
is above the
threshold
voltage, the
output is H I ; if
the signal is below the
threshold
voltage, the output
is LO .
TTL-Transistor-Transistor
Logic .
Section
1--7001
(SN B020000
& up)
"Wired-OR"-ECL
gate outputs that
are connected together
to yield the equivalent
output of an OR
gate .
INSTALLATION
The7001 is calibrated
and ready to
use when received . It is
designed to occupy
a vertical and horizontal
plug-in com-
partment
in all 7000-series
mainframes with
readout except
the
7104, which may suffer
crt damage that will not
be cov-
ered
by the instrument warranty,
and the Digital
Processing
Oscilloscope
(DPO), which will
not digitize the 7001
out-
puts . There
are some operating
modes, however,
that will
not provide proper
operation . These
modes are discussed
under Displaying
Data in Section 2 . Install
the 7001 in the
two compartments
on the right side of a
three-compartment
mainframe, or in
the right vertical andA
horizontal compart-
iments in the center
of a four-compartment
mainframe .
NOTE
Some rackmounted
mainframes have vertically
mounted rods in front
of the plug-in compart-
ments that interfere with the
installation of the
7001 .
Detach these rods
by removing the mount-
ing screws
at each end before
installing the 7001 .