[Elecraft] OT -RFI question

[Tony Estep]

On Thu, May 26, 2011 at 12:56 PM, Jim Brown <jim at audiosystemsgroup.com>wrote:

> ...a cell phone used by the person wearing pacemaker -- worst case, it's a
> 1 watt
> PEP AM UHF, transmitter...


This is interesting. I thought cellphones used an ADC to convert your audio,
then some sort of FSK to transmit it. A web search turned up references to
NFM used by early analog cellphones, but nothing about AM. Can somebody
point me to a relevant link?

Tony KT0NY