[time-nuts] time-nuts Digest, Vol 63, Issue 52

[David C. Partridge]

If you change the scale factor on the oscillator graph to about 100ppt, the
pps to 10nS and the DAC to 50uv it isn't so scary :-)

My oscillator trace is varying about =/- one fifth of a division in the
short term.   My time constant is set at 400 seconds which seems to have
considerably reduced the size of the frequency excursions compared to the
default, and also reduced the large excursions of the DAC voltage.

PS to Mark Sims:  I like the latest beta version of Heather a lot especially
the satellite map improvements.  Could I also suggest you always display the
clock bias to three decimals to reduce dancing.

Dave
-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
Behalf Of GandalfG8 at aol.com
Sent: 11 October 2009 23:13
To: time-nuts at febo.com
Subject: Re: [time-nuts] time-nuts Digest, Vol 63, Issue 52

 
In a message dated 11/10/2009 13:10:55 GMT Daylight Time, holrum at hotmail.com
writes:


Alas,  if there was only an FM to R...  there is some  useful information in
the revision history/comments near the beginning of the  file heather.cpp

The OSC graph defaults to OFF because it tends to be a  very jagged and
noisy looking graph that gets rather annoyingly in the way of  things.  The
next rev of the program has a display filtering option that  makes that plot
look a lot more tame.

The OSC param is shown in PPB in  the status info at the top of the screen 
since that is the way it comes into  the program.   It is shown in PPT in 
the plots since that gives values  that are much easier read against the
scale divisions on the screen.  I have considered converting to PPT in the
status 
info,    can't remember why it stayed  PPB...

---------------------------------------- 

RTFM comes  to mind:-)                   


------------------
LOL
 
Well it's a great piece of software and I think you deserve congratulations,
as does John for the Windows port, and I'm looking forward to  the next
release.
 
Yes, once I'd enabled the osillator graph and it virtually obliterated
everything else I could see why it was normally off:-)
 
I loaded Heather up originally in the hopes that she would also  work for
the Mini-T and would help me make some sense of what I was seeing with
those.
It certainly works ok, comparisons with the Thunderbolt are fascinating and
I've no doubts as to the accuracy of what Lady H is reporting, but the
jury's still out on whether or not it all makes very much sense:-)
 
regards
 
Nigel
GM8PZR
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