Atec WVR500 User Manual
Service Manual
WVR500
Waveform/Vector Monitor
070-8897-01
Warning
The servicing instructions are for use by qualified
personnel only. To avoid personal injury, do not
perform any servicing unless you are qualified to
do so. Refer to all safety summaries prior to performing service.
Specifications
Product Description
This section contains a brief functional description of the WVR500 monitor,
followed by the characteristics tables.
The Tektronix WVR500 monitor is a rasterizing television waveform/vector
monitor which outputs a display signal to a remote monitor or video switcher.
It has dual standard (NTSC and PAL) capability with the functionality of a
waveform monitor, vectorscope, and picture monitor. The instrument is 8 1/2
inch wide by 1 1/2 inch high by 17 inches long, weighing 4 1/2 pounds, fitting
the standard half-rack applications. The instrument can be powered from AC
lines ranging from 90-250 V.
The WVR500 monitor uses a proprietary rasterizer which displays analog-like
waveforms and vectors on the remote monitor simultaneously with the appropriate measurement graticules. The rasterized waveform and vector displays can fill
the entire screen or be reduced to 1/4 sized windows overlaying the picture
monitor display. The picture monitor display cannot be resized.
Instrument operation is controlled by a microprocessor which polls the front-panel switches. The front-panel switches are the momentary touch type, several of
which have lighted functional indicators. Many of the monitoring functions are
selected through the on-screen menus, which are entered by pressing front-panel
buttons.
Displays can come from two channels of unterminated composite video input
loopthrough connectors on the rear panel. An external reference input allows for
the connection of an external sync signal. The rear-panel remote connector
allows for full instrument operation from a remote location.
The Waveform display mode provides three standard sweep rates: 1 Line
(5 ms/Div), 2 Line (10 ms/Div), and 2 Field. The line-rate sweeps can be
magnified X10 to additional sweep rates: 1 Line Mag (0.5 ms/Div), and 2 Line
Mag (1 ms/Div). The 2 Field sweep is magnified by approximately X20. Vertical
gain is either fixed at X1 or X5, or variable from 50% to 120% of the input
signal amplitude. The signal filter selections are Flat (no filter) and Luminance
(low pass filter), which can be displayed separately or in a parade display in the
2 Line and 2 Field sweeps. The Line Select mode allows specific lines to be
viewed. The Amplitude Alarm mode provides automatic video level monitoring
by highlighting the portion of the waveform exceeding the 100 IRE (1.0 V PAL)
graticule line.
WVR500 Waveform/Vector Monitor Service Manual
1–1
Specifications
The Vectorscope display mode displays signals with the standard vectorscope
color bars amplitude and phase relationships. The vector display can also be used
to make differential gain and phase measurements. The +V display (PAL only)
overlays the –V axis on the +V axis to check the PAL system color encoders.
A full 360_ digital phase shifter, with 75% and 100% color bars settings, and
variable gain are provided.
The Picture Monitor display mode displays the video input signal as a picture.
The brightness, contrast, hue, and chroma of the display are set internally and are
not adjustable.
The Waveform-in-Picture display mode displays the Waveform Monitor and/or
the Vectorscope displays in 1/4-screen sized windows overlaying the Picture
Monitor display. The reduced displays can be made semi-transparent for full
viewing of the Picture display.
Options
Accessories
User Interface
Characteristics Tables
Refer to the Options section for a list of the available options for the WVR500
monitor.
Refer to the Replaceable Parts list for a list of the Standard and Optional
accessories.
Many of the instrument monitoring parameters are configured through the menu
system. The
menu access, while the numbered buttons are used to make selections from the
displayed menus. The large unlabeled center knob is called the General Purpose
(GP) Knob, and is assigned control of monitoring functions through the menu
system. Instructions on how to make menu selections begin on page 2–12.
The current setting of several of the front-panel controls are displayed in the
on-screen readout. A description of the on-screen readout begins on page 2–11.
The tables that follow specify instrument electrical characteristics, mechanical
characteristics, environmental characteristics, and certification. The tables are
logically grouped under specific functions, beginning with video input and
vertical channel specifications and ending with the instrument’s certifications.
MENU, PRESETS, DISPLAY, CONFIG, and CLEAR buttons control
1–2
Categories
Each table consists of a column that identifies the characteristics that are defined
by the entries in the description column. A single item in the category column
might have multiple description items, which could include performance
requirements, reference information, and performance verification step numbers.
WVR500 Waveform/Vector Monitor Service Manual
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