John,
Depends on your setup. If one of the channels is synchronous with the
time-base, then you can expect much less noise on that channel, since
you are not sweeping two clocks asynchronous to the time-base, so you
will for relatively clean sources only expose a fractional range of the
phase errors.
Cheers,
Magnus
On 2019-01-08 19:48, John Ackermann N8UR wrote:
Hi Luciano --
Thanks for posting that. There's a subtle point about the noise floor
that's forever been on my list of things to investigate: the noise
floor should be lower in timestamp mode than in time interval (A->B)
mode.
That's because in timestamp mode there is jitter contribution only
from a single measurement, whereas in time interval mode there is a
measurement from each channel so you have two jitter components. So a
guess is that the floor should be about sqrt(2) lower in timestamp
mode. Someday I will test that theory.
John
----
On 1/8/19 12:38 PM, tim...@timeok.it wrote:
.gif of the TICC noise floor.
Luciano
Da "time-nuts" time-nuts-boun...@lists.febo.com
A time-nuts@lists.febo.com
Cc
Data Tue, 8 Jan 2019 18:31:02 +0100
Oggetto Re: [time-nuts] Short term 10MHz source
Hi Paul,
here the TICC noise floor.
Regarding the GPS/TICC versus a good Rubidium standard like the
HP5065A , you cannot apreciate the Rubidium ADEV stability lower than
10Kseconds.
Luciano
Da "time-nuts" time-nuts-boun...@lists.febo.com
A "Discussion of precise time and frequency measurement"
time-nuts@lists.febo.com
Cc
Data Sat, 5 Jan 2019 12:35:26 -0000
Oggetto Re: [time-nuts] Short term 10MHz source
Hi All sorry for a new be question but what is a TICC regards
Paul B UK
-----Original Message-----
From: time-nuts [mailto:time-nuts-boun...@lists.febo.com] On
Behalf Of Chris
Burford
Sent: 02 January 2019 03:56
To: Time Nuts List
Subject: [time-nuts] Short term 10MHz source
I have a situation in which I have access to a GPSDO 10MHz source
but for
only about 10-12 hours at a time. My current residence does not
allow a
permanent GPS antenna therefore I am limited in its use.
I do realise that the long term stability of the GPSDO is
somewhat superior
to a Rubidium source. I'm planning on using my TICC to validate
both my
GPSDO and RFS. I'm aware that such a short "power on" period is
somewhat
counterproductive but I have no other options. I'd like to know
if a 6-8
hour window for the GPSDO is sufficient for use as a 10MHz source
for the
TICC.
I appreciate any and all comments.
Regards, Chris
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