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HD Radio only FM Translator

kfbkfb

kfbkfb

Inspired by the existence of HD Radio only AM stations, I was wondering if anything currently prevents an HD Radio only FM translator?

If they are allowed, could they use up to 250W (same as regular FM translators), or does HD Radio interfere more than regular FM?


Kirk Bayne
 
kfbkfb said:
Inspired by the existence of HD Radio only AM stations, I was wondering if anything currently prevents an HD Radio only FM translator?

If they are allowed, could they use up to 250W (same as regular FM translators), or does HD Radio interfere more than regular FM?
Click to expand...
Sure, there are a lot of FM-HD hybrid translators around. But addressing AM-HD there are two options: 1. analog/digital at the same time, and 2. newly approved digital-only AM (known an MA3 mode).

I don't see where there would be any objection to an MA3 AM already approved for an FM translator, running an FM-HD modulated translator.

Regarding your question about power; to be clear, all translators are not 250W. Effective Radiated Power (ERP) of the translator varies, depending on height, co-and adjacent full class stations in the area, directional antenna pattern, etc.

Because FM HD is frequency modulated, it's easier to keep the digital sidebands inside the mask. So, unless you're a DX'er with a capacitive-tuned 'slide rule' radio, you're unlikely to hear the digital sidebands on an FM-HD station.
 
I was thinking of an HD Radio digital only signal (no analog FM at all) from the FM translator.

IIRC, the HD Radio power level is 1% or 10% of the analog FM signal, so I'm wondering the this would carry over and become 2.5W or 25W maximum power for an HD Radio digital only FM translator.


Kirk Bayne
 
kfbkfb said:
I was thinking of an HD Radio digital only signal (no analog FM at all) from the FM translator.

IIRC, the HD Radio power level is 1% or 10% of the analog FM signal, so I'm wondering the this would carry over and become 2.5W or 25W maximum power for an HD Radio digital only FM translator.


Kirk Bayne
Click to expand...
Digital-only is not currently allowed for FM broadcast stations, including translators. Only AM stations can go full digital modulation.
 
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