Narrow-bandwidth Television Association
Triple Waveform Generator
Printed Circuit Board and stylish instrument case simplifies building a small
electronic circuit that generates three (or five) useful NBTV video test
The assembled printed circuit board. All components are standard and easily
obtained from local suppliers.
Triple Waveform Generator built in a small enclosure, suitable for one preset
Internal view. The output voltage and line frequency are set using the two
preset potentiometers. When fully enclosed this generator is suitable for either
375 or 400 Hz line frequency operation.
Universal version built in a larger cabinet with two extra waveforms.
Internal view. Output voltage, line frequency and missing syncpulse are
adjustable from the front panel. A wafer type switch selects each of five
A5 description in pdf-format.