The 70 cm band has become impractical to be used for ATV. The lowest band left is the 50 cm (UHF TV Channel 39 - 615.25MHz). As it is only 8 MHz wide, VSB TV transmitters need to be used.

Bands above 1 GHz

FMTV is used on all Bands above 1GHz. The sound subcarriers used are 5.5 MHz & 5.742 MHz or 6.0 MHz & 6.5 MHz. RF bandwidths are 15 MHz on the 23 cm band to work into TV repeaters. For FMTV Point to point linking, 27 MHz is used.

ATV band usage have their signal bandwidth very dependent on which band is being used. There are three bands that have more then 200 MHz of bandwidth. The 23 cm band falls within the IF pass band for satellite receivers. This is why I am using the same IF for my TV modulator design.

Both the satellite bands C and KU are nearby in frequency to our ham bands. C band LNBs can be used by tuning to the top end of the sat IF band above 1650 MHz. If your LO (local oscillator) is at 5.150 GHz, you can tune into the upper end of the 9 cm band. Changing or moving the DRO inside its cavity causes the L.O. frequency to move. KU band LNBs with a 9.75 or 10 GHz L.O. are the best type to use for this conversion. This is a simple way to get started on the 3 cm band.