modulation standards

Another SPEAKeasy design goal was to be able to easily incorporate new coding and modulation standards in the future, so that military communications can keep pace with advances in coding and modulation techniques.

XETV's audio signal can be heard on 87.7 MHz on the FM band in San Diego, Tijuana and surrounding areas, though at a slightly lower volume than other FM radio stations due to TV modulation standards.

In Europe, while most countries used the same broadcast standard, there were different modulation standards (PAL-G versus PAL-I, for example), and using an external modulator allowed manufacturers to make a single product and easily sell it to different countries by changing the modulator.