[BC] FCC Modulation measurements

[Harold Hallikainen]

> In a message dated 10/03/2007 4:24:43 PM Eastern Daylight Time,
> pchristensen at ieee.org writes:
>
>> Today, I would be surprised if the FCC still had regional enforcement
>> staff
>>  with the wherewithal, resources and time to make such detailed
> measurements.
>
> Now, it's probably all done digitally. The signal is downconverted to some
> useful IF, then fed directly into a fast A/D converter, where a fast
> DSP/CPU
> computes everything you ever wanted to know about the chosen signal.
> Synchronous
> AM, deviation, spectral purity, bandwidth, pilot injection, subcarriers
> injection & deviation, RBDS, IBUZ, etc.
>
> A PC probably even controls the whole thing. Park the van, push a button,
> 10
> seconds later, you have a readout of every signal the unit could detect.
> Drive
> to the next market, repeat...
>
> Right?
>
> Willie...
>

Could be, but the rules no longer define how to measure modulation. I
think Eric Small or maybe SBE filed a petition 10 or 20 years ago to have
them define such things as how long an FM peak could be ignored, etc.
Maybe they'll get to it in another 10 or 20 years...

Harold
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