HackTV nbtv-am mode + HackRF ONE - first tests

HackTV software in nbtv-am 32-line video mode - first tests

SETUP
- HackTV and Hacktv-gui software on Windows PC
- HackRF One SDR transceiver
- attenuator with DC-blocking capacitor
- tunable xtal detector (am medium wave)
- af amplifier (single transistor)
- mechanical NBTV 32-line disc monitor
- oscilloscope for visual monitoring of video signal

OBSERVATIONS
- image is rotated by 90 degrees and mirrored
- sync pulses very large in proportion to the video signal

It would appear that the implementation of the NBTV 32-line club standard in HackTV (committed Dec. 1, 2020) does not take the scanning direction and aspect ratio of the standard into account.
(NBTV has 32 vertical lines, 12.5 horizontal frames / sec and the scanning direction is from bottom right to top left of the frame. Aspect ratio is 3:2 in portrait orientation.)

LINKS