[Elecraft] OT -RFI question

[Alan Bloom]

TDMA (time division multiple access) cell phones share a frequency
channel by transmitting only in certain time slots.  The power is pulsed
on and off even though the modulation mode may be constant-power.

Al N1AL


On Thu, 2011-05-26 at 15:19 -0500, Tony Estep wrote:
> 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
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