Is there a "best" way to do this without adding phase noise? For example, a
5V OCXO into an ADF4002, or a 3.3V or even 1.8V logic input. Is a resistive
divider the way to go?
Mark
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Hi Hal,
I'm familiar with 1-bit D/As and plan to use something a bit more evolved
than the MCU/counter approach. I am already working in an FPGA as that is
absolutely required to deal with the 80-MSPS 16-bit radio data stream.
(This is an SDR project first, a GPSDO project second, or maybe third
Said, would you suggest implementing the dividers and PFD in the FPGA, along
with the digital filtering? Or feeding the FPGA with some version of the
PFD output? I am trying to avoid an extra A/D step here, but I have no
experience with it. Post-filter, I am satisfied that a simple one-bit D/A
w
Thanks to everyone who responded. I had this bright idea that I would turn
off mail delivery and just read the list through the pipermail interface.
It works great, until you want to reply to a message. Sorry if this breaks
the thread in two.
Language is imprecise even when carefully thought ou
Hi everyone,
I'm new to the list, and have been reading the recent threads on
Arduino-based GPSDOs and the pros/cons of 10-kHz vs 1-Hz time pulses with
interest.
As I understand it, there are a couple of reasons why one needs a
time-interval / phase measurement implemented outside the MCU:
1) Ti
