Tektronix 7623A User manual

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TEKTROND©
INSTRUCTION MANUAL
Tektronix, Inc.
P.O. Box 500 es
Beaverton, Oregon 97005 Serial Number 2.
070-1684-00
First
Printing
April
1974

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7623A/R7623A Operators
TABLE OF CONTENTS
LIST OF ILLUSTRATIONS
LIST OF TABLES
SECTION 1 OPERATING INSTRUCTIONS
PRELIMINARY OPERATION
AC POWER SOURCES
AC POWER CORD
OPERATING VOLTAGE
OPERATING TEMPERATURE
RACKMOUNTING
PLUG-IN UNITS
PLUG-IN INSTALLATION AND REMOVAL
CONTROLS AND CONNECTORS
FRONT PANEL CONTROLS AND CONNECTORS
REAR PANEL CONTROLS AND CONNECTORS
OPERATING CHECKOUT
GENERAL
SET-UP INFORMATION
DISPLAY FOCUS
TRACE ALIGNMENT
GRATICULE ILLUMINATION
VERTICAL DEFLECTION SYSTEM
TRIGGERING ‘
HORIZONTAL DEFLECTION SYSTEM
STORAGE OPERATION
BEAMFINDER
Z-AXIS INPUT
GENERAL OPERATING INFORMATION
INTENSITY CONTROL
DISPLAY FOCUS
GRATICULE
LIGHT FILTER
BEAMFINDER
Page
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1-6
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7623A/R7623A Operators
TABLE
OF
CONTENTS
(cont.)
Page
READOUT MODES 1-19
DISPLAY PHOTOGRAPHY 1-19
STORAGE 1-20
CARE OF STORAGE SCREEN 1-21
VERTICAL MODE 1-22
TRIGGER SOURCE 1-23
X-Y OPERATION 1-24
INTENSITY MODULATION 1-24
RASTER DISPLAY 1-25
CALIBRATOR 1-25
SIGNALS OUT 1-26
APPLICATIONS 1-27
SECTION 2 SPECIFICATIONS 2-1
INTRODUCTION 2-1
STANDARD ACCESSORIES 2-9
SECTION 3 RACKMOUNTING INSTRUCTIONS 3-1
INTRODUCTION 3-1
INSTALLATION INSTRUCTIONS 3-1
RACK DIMENSIONS 3-1
SLIDE-OUT TRACKS 3-2
MOUNTING PROCEDURE 3-4
REMOVING OR INSTALLING THE INSTRUMENT 3-5
SLIDE-OUT TRACK LUBRICATION 3-5
SECTION 4 OPTIONS 4-1

LIST OF ILLUSTRATIONS
FRONTISPIECE
Figure 1-1. Location of voltage-selector jumper.
Figure 1-2. Front panel controls and connectors.
Figure 1-3. Rear panel controls and connectors.
Figure 1-4. Definition of measurement lines on the graticule.
Figure 1-5. Location of Readout Mode switch.
Figure 1-6. Location of Calibrator jumper on Storage circuit board.
Figure 3-1. Slide out track assembly and mounting hardware.
Figure 3-2. Vertical mounting position of the left stationary section and the
securing hole location. These dimensions also apply to the right front rail.
Figure 3-3. Details for mounting stationary sections.
Figure 3-4. Installing and removing the instrument.
Figure 3-5. Adjusting the slide out tracks for smooth sliding action.
Figure 3-6. Dimensional drawing.
LIST OF TABLES
TABLE 1-1. Power Cord Color Coding
TABLE 1-2. Regulating Range and Fuse Data
TABLE 2-1. ELECTRICAL
TABLE 2-2. ENVIRONMENTAL
TABLE 2-3. PHYSICAL
TABLE 2-4. SYSTEM SPECIFICATIONS
7623A/R7623A Operators
Page
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1-9
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7623 OSCHLOSCOP!
5
The
Tektronix
7623A/R7623A
Storage
Oscilloscope
is
a
solid-state
instrument
designed
for
fast
writing
rate
storage
applications.
The
7623A
operates
in
three
display
modes—NON
STORE,
STORE,
and
SAVE,
and
has
four
storage
modes—
BISTABLE,
VAR
PERSIST,
FAST
BISTABLE,
and
FAST
VAR
PERSIST.
This
instrument
has
three
plug-in
compartments
that
accept
any
7-series
plug-in
units
to
form
a
highly
flexible
measurement
system.
7623A/R7623A Operators ®
—_

Section 1—7623A/R7623A Operators
OPERATING INSTRUCTIONS
PRELIMINARY OPERATION
To effectively use the 7623A/R7623A Storage Oscilloscope, the operation and capabilities of the instru-
ment must be known. This section provides preliminary operating information, describes operation of con-
trols and connectors, and provides an operating checkout procedure.
AC POWER SOURCES
This instrument is intended to be operated from a single-phase, earth-referenced power source having
one current-carrying conductor (the Neutral Conductor) near earth potential. Operation from power sources
where both current-carrying conductors are live with respect to earth (such as phase-to-phase on a three-wire
system) is not recommended since only the Line Conductor has over-current (fuse) protection within the
instrument.
AC POWER CORD
This instrument has a three-wire power cord with a three-terminal polarized plug for connection to
the power source and safety-earth. The safety-earth terminal of the plug is directly connected to the in-
strument frame. For electric-shock protection, insert this plug only in a mating outlet with a safety-earth
contact or otherwise connect the frame to a safety earth system. The color-coding of the cord conductors
is in accordance with recognized standards as shown in Table 1-1.
TABLE 1-1
Power Cord Conductor Identification
Conductor Color Alternate Color
Ungrounded (Line) Brown Black
Grounded (Neutral) Blue White
Grounding (Earthing) Green-Yellow Green-Yellow
The 7623A/R7623A can be operated from either a 110-volt or a 220-volt nominal line-voltage source.
In addition, three operating ranges can be selected within each nominal line voltage source. Use the follow-
ing procedure to obtain correct instrument operation from the line voltage available:
1. Disconnect the instrument from the power source.
2. Remove the six screws securing the power unit (nine screws in the R7623A;; see Figure 1-1).
3. Slide the power unit out of the rear of the chassis.
REV. C, NOV. 1976 1-1

Operating Instructions—7623A/R7623A Operators
POWER UNIT
SECURING
SCREWS
ALT SPARE VOLTAGE-SELECTOR
FUSE JUMPER JUMPER
Figure 1-1. Location of voltage-selector jumper.
4. To convert from 110-volts to 220-volts nominal line voltage, or vice versa, remove the voltage-
selector jumper and replace it with the spare jumper stored on the pins adjacent to the voltage selector
area (see Figure 1-1). The jumpers are color coded to indicate the nominal voltage for which they are in-
tended; brown for 110-volt nominal operation and red for 220-volt nominal operation. Change the fuse to
provide protection for the selected nominal line voltage. Use the fuse located in the Alt Fuse holder on the
Rectifier board (see Figure 1-1 for fuse location and Table 1-2 for fuse type). Also, change the line-cord
plug to match the power-source receptacle or use a suitable adapter.
1-2 ®
>

Operating Instructions—7623A/R7623A Operators
5. To convert the instrument from one regulating range to another, remove the voltage selector
jumper and re-install it on the set of pins corresponding to the desired regulating range. The proper reg-
ulating range will center about the average line voltage to which the instrument is to be connected (see
Table 1-2).
TABLE 1-2
Regulating Range and Fuse Data
Pins Regulating Range
Selected
110-volts (nominal) 220-volts (nominal)
LOW 90 to 110 volts 180 to 220 volts
MED 99 to 121 volts 198 to 242 volts
HI 108 to 132 volts 218 to 262 volts
Line Fuse 3.2 A slow-blow 1.6 A slow-blow
OPERATING TEMPERATURE
The 7623A can be operated where the ambient air temperature is between 0°C and +50°C. This in-
strument can be stored in ambient temperatures between —55°C and +75°C. After storage at temperatures
beyond the operating limits, allow the chassis temperature to come within the operating limits before power
is applied.
The 7623A is cooled by air drawn in through the top, side, and bottom panels and exhausted through
the rear panel. Components that require most cooling are mounted externally on a heat radiator. Adequate
clearance must be provided on all sides to allow heat to be dissipated from the instrument. Do not block or
restrict the air flow through the holes in the cabinet or the heat radiator. Maintain the clearance provided
by the feet on the bottom and allow about two inches clearance on the top, sides, and rear (more if possible).
The R7623A is cooled by air drawn in through the air filter on the rear panel and exhausted through
ports on the right side of the instrument. Adequate clearance must be provided at these locations. Allow
at least one and one-half inches clearance behind the air filter and at least one inch on the right side.
A thermal cutout interrupts power to the instrument if the internal temperature exceeds a safe oper-
ating level. Power is automatically restored when the temperature returns to a safe level. Operation in
confined areas or close to a heat source may cause the thermal cutout to open.
RACKMOUNTING
Instructions and dimensional drawings for rackmounting the R7623A are located in Section 3.
® 1-3

Operating Instructions—7623A/R7623A Operators
PLUG-IN UNITS
The 7623A will accept up to three 7-series plug-in units. This plug-in feature permits a variety of
display combinations and also allows selection of bandwidth, sensitivity, display mode, etc. to meet many
measurement requirements. In addition, it allows expansion of the oscilloscope system to meet future
measurement requirements. The overall capabilities of the resultant system are in large part determined
by the characteristics of the plug-in selected. For complete information on plug-ins available for use with
this instrument, see the current Tektronix, Inc., catalog.
PLUG-IN INSTALLATION AND REMOVAL
To install a plug-in unit into one of the plug-in compartments, align the slots in the top and bottom
of the plug-in with the associated guide rails in the plug-in compartment. Push the plug-in unit firmly into
the plug-in compartment until it locks into place. To remove a plug-in, pull the release latch on the plug-in
unit to disengage it and pull the unit out of the plug-in compartment. Plug-in units can be removed or in-
stalled without turning off the instrument power.
It is not necessary that all of the plug-in compartments be filled to operate the instrument; the only
plug-in units needed are those required for the measurement to be made. However, at environmental ex-
tremes, excess radiation may be radiated into or out of this instrument through the open plug-in compart-
ments. Blank plug-in panels are available from Tektronix, Inc., to cover the unused compartment; order
Part No. 016-0155-00.
When the 7623A is calibrated in accordance with the calibration procedure given in the Service manual,
the vertical and horizontal gains are standardized. This allows calibrated plug-in units to be changed from
one plug-in compartment to another without recalibration. However, the basic calibration of the individual
plug-in units should be checked when they are installed in this system to verify their measurement accuracy.
See the plug-in unit instruction manual for verification procedure.
Special purpose plug-in units may have specific restrictions regarding the plug-in compartments in
which they can be installed. This information will be given in the instruction manual for these plug-in units.
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