Thank you Attila,
Just for informations, as I must build the board from scratch, does this
design is good to implement into the datalogger?
I mean, for the second RTK purpose, does this u-blox module satisfy my
requirements (link below)?
http://www.opendigitalradio.org/lea-m8f-gpsdo
Regards,
Ilia.
Il 26/04/2016 01:36, Attila Kinali ha scritto:
On Mon, 25 Apr 2016 23:34:52 +0200
Ilia Platone <[email protected]> wrote:
I selected this because of the CMOS output, since I didn't find any
Connor Winfield osc with these levels yet.
To get to CMOS levels, you usually add a simple inverter, with an
capacitor in front and a 1M resistor across the inverter (from input
to output).
Actually want to achieve less than around 78ps jitter at 125MHz. (this
should be achievable using this also:
http://www.digikey.it/product-detail/it/fox-electronics/FVXO-HC53B-125/FVXO-HC53B-125-ND/2153894)
I think you are mixing up a few things here:
Your logger might have very relaxed jitter requirements, but the
GPS module needs a low noise reference signal. If you feed it with
the noisy HC53 output, you will degrade your GPS receivers performance
severely. At the minimum, you should use a normal XO for the GPS modul.
You can of corse use a HC53 as the reference for your logger if its
jitter is ok for you.
And for comparison, for a XO you usually talk about jitter in the
order of 100fs to 1ps (10kHz-20MHz)
Attila Kinali
--
Ilia Platone
via Ferrara 54
47841
Cattolica (RN), Italy
Cell +39 349 1075999
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