The technical parameters of SATV (small-bandwidth ATV) are as follows:

1. Picture frequency and line frequency as for the CCIR-2 system.

2. Maximum video bandwidth between 500 kHz and 1 MHz.

3. No audio carrier; the audio information is NBFM modulated on the video carrier, maximum deviation ±5 kHz.

Note : SATV transmitters are very easy to construct : no audio transmission is required and the tuning of the PA stages is simple.

At the receiving end there are two possible concepts:

a. The bandwidth of the TV receiver is made smaller and an I.F. limiter plus an FM detector are added.

b. A normal FM receiver is used for the audio part of the signal. From between the mixer and the I.F. filter of this receiver the broadband signal is coupled to a separate I.F. amplifier and detector, and the video signal obtained is sent to a video monitor.

Modern TV receivers can be easily modified for SATV.

Note: Advantages: Better use of the bands - e.g. several simultaneous QSO's possible in the bandwidth available in the 435 MHz band - and better signal range.