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Thread: Crystal Tutorial
www.piclist.com/techref/index.htm?key=crystal+tutorial
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face BY : cousensspam_OUT@her.forthnet.gr



Peter L. Peres wrote:
Not always so I was flipping through the fm band in london some years
ago ( just after the launch of the national radio-one on the fm band )
The new radio one station was 3hz off frequency (could have been my
equipment)
the national radio-two was 7hz off freq.

One the two London comercial station, Capital Radio, was 280khz off freq
LBC, the other, about 200hz
After a phone call to the DTI radio division the next day
Capital (bubble gum) Radio was only 150hz off

> *However* if a local radio station is strong enough then its carrier can
> be received in a direct conversion receiver and divided directly. Provided
> it is not some pirate transmitter, it should be linked to a very good
> frequency standard in most countries. AM is better than FM here and AM
> beacons are best (such as used for naval and aviation purposes).

FM is also difficult to measure (75khz modulation) you have to wait
for the music to stop to get an accurate reading (and the DJ to shut up)

I use a digital scanning receiver with a frequency counter permanantly
connected to the 10.7mhz 1st. IF out (it also has a 455khz output)
it serves as a tuning aid and a quick guide to the stations status
(licensed or pirate)

>
> BUT I was interested in a stand-alone, simple set of methods.
>
> Peter

--
Peter Cousens
email: cousensspamspamspam_OUTher.forthnet.gr  phone: + 3081 380534
snailmail:  Folia, Agia Fotini, Karteros, Heraklion  Crete, Greece.

Is it true that they have, on the new version of windows
managed to increase the MTBF from 95 to 98 minutes ?
(That's why they called it 95)

<3637A544.5620@her.forthnet.gr> 7bit

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