to build a
> receiver? I do have some ham gear that will receive there but signals aren't
> so good.
>
> Bob
>
>
>
> From: Bob Camp
> To: Discussion of precise time and frequency measurement
> Sent: Friday, September 27, 20
Bob
From: Bob Camp
To: Discussion of precise time and frequency measurement
Sent: Friday, September 27, 2013 1:35 PM
Subject: Re: [time-nuts] Shielding a DAC line -> WWV
Hi
Anything under 100 ppb relative to WWVB is probably closer than the ionosphere
will
li...@rtty.us said:
> Anything under 100 ppb relative to WWVB is probably closer than the
> ionosphere will let you get under normal conditions. You can indeed get a
> zero beat, but that's not always a guarantee that the carrier isn't moving
> around at some odd rate. Far better to use WWVB. The
___
> From: Bob Camp
> To: Discussion of precise time and frequency measurement
> Sent: Friday, September 27, 2013 1:11 PM
> Subject: Re: [time-nuts] Shielding a DAC line -> WWV
>
>
> Hi
>
> If you already know that the standard is within 50
t now.)
Bob
From: Bob Camp
To: Discussion of precise time and frequency measurement
Sent: Friday, September 27, 2013 1:11 PM
Subject: Re: [time-nuts] Shielding a DAC line -> WWV
Hi
If you already know that the standard is within 50 ppb, then it only c
in
> synchronization.
>
>
> Bob
>
>
>
>
> From: Bob Camp
> To: Discussion of precise time and frequency measurement
> Sent: Friday, September 27, 2013 4:30 AM
> Subject: Re: [time-nuts] Shielding a DAC line -> WWV
>
>
> Hi
>
&
beats aren't varying.
What do you think?
Bob
From: Bob Camp
To: Discussion of precise time and frequency measurement
Sent: Friday, September 27, 2013 4:30 AM
Subject: Re: [time-nuts] Shielding a DAC line -> WWV
Hi
One hertz at 20 MHz is indeed
beats aren't varying.
What do you think?
Bob
From: Bob Camp
To: Discussion of precise time and frequency measurement
Sent: Friday, September 27, 2013 4:30 AM
Subject: Re: [time-nuts] Shielding a DAC line -> WWV
Hi
One hertz at 20 MHz is indeed
rt of the cycle to
compare so that I can listen to the ticks trying to be in synchronization.
Bob
From: Bob Camp
To: Discussion of precise time and frequency measurement
Sent: Friday, September 27, 2013 4:30 AM
Subject: Re: [time-nuts] Shielding a DAC
eady to go GPS or buy a rubidium standard.
>
>
> Bob
>
>
>
>
> From: Bob Stewart
> To: Discussion of precise time and frequency measurement
> Sent: Thursday, September 26, 2013 6:13 PM
> Subject: Re: [time-nuts] Shielding a DAC line
>
>
> Hi Bob,
>
>
;
>
>
> From: Bob Stewart
>To: Discussion of precise time and frequency measurement
>Sent: Thursday, September 26, 2013 6:13 PM
>Subject: Re: [time-nuts] Shielding a DAC line
>
>
>Hi Bob,
>
>I should have mentioned that I added a new 5
_
> From: Bob Camp
>To: Discussion of precise time and frequency measurement
>Sent: Thursday, September 26, 2013 7:54 PM
>Subject: Re: [time-nuts] Shielding a DAC line
>
>
>Hi
>
>I suspect that you have a ground offset between the OCXO's ground return and
&
on of precise time and frequency measurement
>Sent: Thursday, September 26, 2013 7:54 PM
>Subject: Re: [time-nuts] Shielding a DAC line
>
>
>Hi
>
>I suspect that you have a ground offset between the OCXO's ground return and
>the DAC's ground reference. The signal *sho
Hi
I suspect that you have a ground offset between the OCXO's ground return and
the DAC's ground reference. The signal *should* be DC, Shielding it won't hurt,
but it really should not help much. If anything is an issue a simple R/C
filter at the OCXO pin should nuke it better than coax will.
I made some minor hardware changes to my GPSDO today and I see that it's locked
to a new DAC voltage about 21mV higher. So, I was wondering about shielding
the short run to the OCXO. I have immediately available RG-174 and I'm putting
that in. But, should this be some sort of steel shelled se
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