[time-nuts] Short term 10MHz source

[timeok at timeok.it]

   John,
   I suppose this and all my measurenents are made in time stamp mode.
   Thanks for the work you have done.
   Luciano


   Da "time-nuts" time-nuts-bounces at lists.febo.com
   A time-nuts at lists.febo.com
   Cc
   Data Tue, 8 Jan 2019 13:48:22 -0500
   Oggetto Re: [time-nuts] Short term 10MHz source
   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, timeok at timeok.it wrote:
   >
   > .gif of the TICC noise floor.
   > Luciano
   >
   >
   > Da "time-nuts" time-nuts-bounces at lists.febo.com
   > A time-nuts at 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-bounces at lists.febo.com
   > A "Discussion of precise time and frequency measurement" time-nuts at 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-bounces at 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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