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Message-ID: <057b01c66738$3e091550$7900a8c0@athlon1200>
From: "Dave Brown" <tractorb@ihug.co.nz>
To: <rsgb_lf_group@blacksheep.org>
References: <444AF315.9020304@telus.net> <056601c66732$7dba60b0$7900a8c0@athlon1200> <444C1A56.4060202@telus.net>
Date: Mon, 24 Apr 2006 12:44:28 +1200
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Subject: Re: LF: Re: PhaseScope beta 1.0 release...
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Scott, Murray
 Fine. Tks for replies.
 I'm not concerned about the RX stability contribution-that's under 
control (or should be!) But for non-GPS  disciplined TXs I wondered 
just how good they would have to be to be able to be 'observed'-as in 
how much latitude there was for the transmitted frequency to be offset 
from the nominal.  Seems like plus/minus 1 Hz may be the limit as per 
Scotts email, although as Murray points out, the phase info will 
probably be of no particular value for such sources, always assuming 
the source remains inside the above limits over the integration time.

Possible 'targets' noted, Murray- Is there a source from Antarctica on 
exactly 20 kHz? I had a look for the 19.1 kHz TX down there last year 
but as it was only on for 60 seconds at a time every few minutes I 
didnt 'copy' it. Not sure if it's still running-must check.

I'll get back to you re a test on 181.4 some time soon.

73 Dave, ZL3FJ


----- Original Message ----- 
From: "Scott Tilley" <sthed475@telus.net>
To: <rsgb_lf_group@blacksheep.org>
Sent: Monday, April 24, 2006 12:22 PM
Subject: Re: LF: Re: PhaseScope beta 1.0 release...


> Dave
>
> Your RX needs to be stable to within a Hz if it is Clicklock can 
> deal with the variations... If the RX is say 2 Hz off calibration 
> then simply offset the integer value set in phase scope to deal with 
> this... RX stability to within a Hz (+- 0.5Hz) is the most important 
> feature and most LF receivers do this well.  Otherwise the Clicklock 
> alg. can deal with it...
>
> I'm sure Peter will go on and on about this shortly :-)
>
> Good luck.
> Scott
>
>
> Dave Brown wrote:
>> Hi Scott
>> Wondering just how close to nominal does the tx have to be 
>> maintained to stay 'in view' so to speak?
>> 73
>> Dave, ZL3FJ
>>
>> ----- Original Message ----- From: "Scott Tilley" 
>> <sthed475@telus.net>
>> To: "LWCA LF Reflector" <lowfer@lwca.org>; 
>> <rsgb_lf_group@blacksheep.org>
>> Sent: Sunday, April 23, 2006 3:23 PM
>> Subject: LF: PhaseScope beta 1.0 release...
>>
>>
>>> PhaseScope based on the 'Clicklock' algorithm by Peter Martinez, 
>>> G3PLX is now available for download and testing by interested 
>>> experimenters.
>>>
>>> Download the archive here:
>>> http://www3.telus.net/sthed/phasescope/
>>>
>>> I have only tested it on a system running Windows XP.  If you are 
>>> interested in a MAC or Linux build let me know as the API used and 
>>> the coding allows this... An earlier Linux alpha version was 
>>> tested successfully...
>>>
>>> The package comes with detailed instructions.
>>>
>>> Comments and bug reports encouraged.
>>>
>>> 73 Scott
>>>
>>>
>>>
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>>>
>>
>>
>>
>
>
>
> -- 
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> 


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