For AM stations with an FM translator, the same encoding is used. FM stations that run multiple HD streams get separate Nielsen encoders for each format/channel. I've seen many FM's that don't encode their HD-2, 3, etc. In theory, stations are supposed to use separate encoding for a stream, but that doesn't always happen either.Does the PPM system allow for different PPM codes to be embedded in the (original) AM signal and HD/Translator/Stream signals (or even up to 4 different PPM codes so the AM, HD, Translator and Stream content can be individually rated)?
