Operating Temperature; Plug-In Units; Installation; Interchanging Plug-Ins - Tektronix 7704A Instruction Manual

Operating Instructions—7704A Operators
Operating Temperature
The 7704A can be operated where the ambient air
temperature is between O°C and +50°C. This instrument
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 7704A is cooled by convection air flow through the
instrument. Adequate clearance must be provided on all
sides to allow heat to dissipate. Do not block or restrict the
air flow through the holes in the cabinet. Maintain the
clearance provided by the feet and allow about two inches
clearance on the top, sides and rear (more if possible).
Operating Position
A bail-type stand mounted on the bottom of the
instrument permits the 7704A to be tilted up about 10° for
convenient viewing.
PLUG-IN UNITS
General
The 7704A accepts up to four TEKTRONIX 7-series
plug-in units. This plug-in feature allows a variety of display
combinations and also allows selection of bandwidth,
sensitivity, display mode, etc. to meet the measurement
requirements. In addition, it allows the oscilloscope system
to be expanded to meet future measurement requirements.
The overall capabilities of the system are determined by
the characteristics of the plug-ins selected. Some typical
combinations are given under ""Applications'" on page 1-18.
along with simplified instructions for setting them up. For
information on other plug-ins, see the current Tektronix,
Inc. catalog.
Installation of Plug-In Units
CAUTION
Plug-in units should not be installed or removed
without first turning the instrument power off, to
prevent instrument damage.
To install a plug-in unit into a plug-in compartment,
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 to pull the unit out
of the compartment.
1-2
All the plug-in compartments do not need to be filled to
operate the instrument; the only plug-ins needed are those
required for the measurement to be made. At environ-
mental extremes, excess interference may be radiated into
the instrument through the open plug-in compartments.
Blank plug-in panels are available from Tektronix, Inc. to
cover the unused compartments; order TEKTRONIX Part
No. 016-0155-00.
Interchanging Plug-ins
When the instrument is calibrated as directed in the
Service Manual's Calibration procedure, the vertical and
horizontal gains are normalized, allowing calibrated plug-in
units to be interchanged from one 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 operating instructions section of the
plug-in unit instruction manuals for verification procedure.
CONTROLS AND CONNECTORS
The major controls and connectors are located on the
front panel of the instrument. Several auxiliary functions
are provided on the rear panel. Figure 1-2 shows the front
and rear panels and provides brief descriptions of each
control and connector. More detailed operating information
is given under 'Detailed Operating Information' starting on
page 1-9.
Front-Panel Color Coding
Portions of the front-panel of the 7704A and its plug-in
units are color-coded as follows to aid in operating the
instrument:
RED
Identifies the nomenclature and controls that will
uncalibrate the instrument.
BLUE
Identifies the controls affecting the CRT display mode.
GREEN
Identifies all trigger controls.
Other colors such as gray, orange, yellow, etc. have no
functional assignments, but are used as needed to indicate
the relationship between the appropriate controls and
connectors.
REV. B, NOV. 1977