[GreenKeys] DOVETRON TRANSMITT TONES DRIFTING

[Bob Camp]

Hi

One quick way to check the tones is to feed them into a computer 
spectrum analysis program. There are a number of good free ones on the 
net. They all will give you more information about the tones than you 
ever want to know ...

	Take Care!

		Bob


On Mar 20, 2005, at 9:35 PM, Roy Morgan wrote:

> At 04:50 PM 3/20/2005 -0800, ROBERT LAAG wrote:
>> JUST WONDERING IF ANYONE HAS SEEN THE PROBLEM WHERE THE TRANSMITTING 
>> TONES START DRIFTING OFF FREQ???
>
>
> Robert,
>
> Let's clarify a little bit,  can we?
>
> Are you feeding the AFSK tones output of the Dovetron into the audio 
> section of your transmitter?
>
> Are you getting reports that your transmitted tones are drifting.. if 
> so are BOTH tones drifting, or just ONE?  Or are they both drifting 
> the same amount? Different amount?
>
> Have you measured the audio tones from the Dovetron with a frequency 
> counter?  You can get it into Mark or Space hold and see what the 
> frequencies are and see if they are actually drifting.
>
> If BOTH of your transmitted tones are drifting, then it's likely in 
> the transmitter, not the Dovetron, assuming you are using AFSK tones 
> fed to the audio section of your transmitter.
>
> I look forward to hearing what the trouble is once you find it.
>
> Roy
>
> Roy Morgan
> K1LKY since 1959
> 7130 Panorama Drive, Derwood MD 20855
> 301-330-8828 home .... 301-975-3254 work
> roy.morgan at nist.gov
>
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