Tektronix 634, Инструкция по эксплуатации

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Section 1 —634 Operators
GENERAL INFORMATION
INTRODUCTION
The Operators Manual contains information necessary to
effectively operate the 634 Monitor and is divided into
three sections: Section 1 provides packaging for
shipment information, specifications, and a list of
standard accessories. Section 2 contains operating
information. Information concerning available options for
the 634 Monitor is located in section 3.
WARNING
The Instruction Manual contains ten sections. Operating
information is covered in the first two sections, servicing
information is covered in the remaining eight sections.
Schematic diagrams are located at the rear of the manual
and can be unfolded for reference while reading other
parts of the manual. The reference designators and
symbols used on the schematic diagrams are defined on
the first page of the Diagrams and Circuit Board
Illustrations section. Abbreviations used in the manuals,
except in the parts list and schematic diagrams, comply
with the American National Standards Institute Y1.1-
1972 publication. The parts list is a computer printout
and uses computer supplied abbreviations.
INSTRUMENT DESCRIPTION
The 634 Monitor is a compact, solid-state instrument
with excellent resolution, providing a video display of
information input to the VIDEO INPUT connectors on the
rear panel.
High voltage is present inside the instrument.
To avoid electric shock, operating personnel
must not remove the protective covers.
Component replacement and interna!
adjustments must be made by qualified
service personnel only.
Video signals connected to the VIDEO INPUT connector
are amplified by the Input and Video Output Amplifiers to
drive the crt control grid.
The Input Amplifier also supplies a synchronization
signal to the Vertical and Horizontal Ramp Generators.
The vertical and horizontal ramps are then geometrically
shaped and amplified to drive the electromagnetic
deflection yokes.
Signal samples from the Vertical Ramp Generator and
Horizontal Yoke Driver provide retrace blanking to the crt
cathode. Screen blanking can be achieved by supplying a
zero input level to the rear-panel TTL BLANKING
connector.
The Dynamic Focus circuit provides focus correction for
the display when the crt beam is deflected from crt
center. Thus, by varying the voltage to the crt focus
element, the Dynamic Focus Circuit compensates for
geometric defocusing.
The High-Voltage and Low-Voltage Power Supplies
provide all the voltages necessary for operation of this
instrument.
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