View Single Post
Old 6th Dec 2017, 2:07 pm   #7
Join Date: Jun 2009
Location: Herefordshire, UK.
Posts: 2,219
Default Re: 405 line TV with the HackRF

fsphil. As far as I know audio was transmitted with AM modulation, the sound power being 1/4 of the vision power (ie the same as for the 405 line system). The very early 240/405 dual standard TVs (Televisors??) only had to change the vertical scanning parameters, not the audio.
SteveCG is offline