User Manual Part 2

Analog Color Bar Generator B-2MTX5000 User and Technical Manual
B.2.3 Configuration
Each of the four operating modes can be configured to meet
your needs. Configuration is accomplished using four push
button switches mounted on the CBG board. Configuration is
normally performed only when the MTX5000 IDU is first
installed, or if the CBG has been replaced by the factory.
Configuring the CBG will include specifying the following:
• If the CBG will generate audio tones, video color bars, or
both
• What text will be displayed on screen whenever the color
bars are displayed. There are two lines of text: Text Line
A and Text Line B. Each line contains 16 character fields.
Each character field can display any character in the full
character set.
• Where each text line is displayed on the screen
• Which characters in a text line are visible on the default
screen and which are hidden
• The foreground and background colors of the text lines
• The length of time (delay) the CBG will wait after loss of
video signal before it begins generating tones and/or bars.
Configuration of the CBG consists of selecting the characters for
each of the two lines of text and for a seven-character control
line.
B.2.4 Technical Background
The CBG includes circuits that provide both a video signal, and
audio test tones of 1 kHz and 400 Hz on separate audio
channels (1 kHz on Audio 1, 440 Hz on Audio 2).
Text lines and parameters are stored in memory and are
controlled by a microprocessor. A video detection circuit notifies
the processor whenever a valid external video signal is present.
Non-volatile memory preserves parameters and transmitter ID
information. Once set, no battery or other power is required to
save these parameters.
B.3 Configuration
B.3.1 General
Configuration of the CBG involves using the MTX5000 IDU color
LCD display panel touch screen or function keys, four control
switches on the CBG board (See Figure B-1 on page B-3), and
an external monitor to enter text for the text lines and the
numerical parameters for the control line.
The MTX5000 IDU must be removed from its mounting rack (if
installed). The top cover panel must then be removed to allow
connection between the external monitor and the CBG and to
allow access to the four control switches. Steps are provided in
the following procedures to set all parameters in the CBG.
To avoid potential operator problems that could impact operation
of the MTX5000 System, the IDU color LCD display panel Color
Bars screen Off option must be selected when procedures
contained in this Appendix are completed.
When performance of these procedures is complete, perform
“Select Color Bar Generator Mode” on page 3-52 to select the
CGB operating mode required for Analog Preset operations.