Promax GV-698, Instruction Manual

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TV SIGNAL GENERATOR
GV-698
1 GENERAL
1.1 Description
The GV-698 TV signal generator is a multi-standard, multi-system unit with
advanced functions. It has been designed using the most modern technology resulting
in great reliability and reduced consumption. Its modular structure makes it highly
versatile and permits rapid access to all its components. Starting from base modules,
it is possible to increase the applications of the instrument by adding modules if
desired.
The GV-698 is particularly suitable for those industrial sectors that require
high-quality pictures such as adjustment and analysis lines, production studios,
technical assistance services, etc. In addition, being easy to operate, it is indispensable
in the training of video technicians.
The GV-698 operates in accord with the CCIR/OIRT recommendations for the
colour systems PAL-SECAM and FCC for the NTSC system and may provide a
modulated signal for practically all the transmission standards presently in use. The
video is equipped with 32 pattern charts to analyze the picture visually or with an
oscilloscope. For geometric adjustments, the electronic circle can be inserted in all the
charts.
To detect defects in the tuning circuits and IF amplifier stages, the GV-698 has
a complete radio-frequency modulator, its principal characteristics being:
- Frequency range from 37 to 865 MHz
- Synthesized frequency output
- Tuning by channels or by frequency (in steps of 50 kHz)
- Attenuation of output RF signal up to 50 dB (in steps of 10 dB)
The VTR (Video Text Recorder) function is available to check the functioning
of video tape recorders, particularly the functions of "still", stepped image, heads
position, etc.
Microprocessor control, the presentation of information on a wide illuminated
alphanumeric display and the incorporation of a single rotary selector for all the
functions results in simple and easy operation. The functions controlled are:
- Selection and display of RF by channel or by frequency
- Selection of the colour system and sound standard
- Selection of the output chart
- Storage of up to 32 different programs is possible. Each program
(chart/system-sound standard/frequency or RF channel) may be stored or
retrieved at any time.
Internal (1 kHz/3 kHz) or external modulation of sound is possible. For a
superior analysis of the video and sound signal, there are push–buttons for cancelling
or including certain basic functions, such as:
05/96 GV-698