[time-nuts] Re: Ublox NEO-M8T-0-10​as a LO question

[John Ackermann N8UR]

That's probably a really bad idea.  The phase noise from the TIMEPULSE 
output is pretty bad compared to a "real" RF source, and by the time 
it's multiplied up to 10 GHz you'll have more noise than signal. 
Attached are some phase noise plots and a couple of spectrum analyzer 
captures to give you some idea what to expect.

BTW, even the Bodnar unit may not look too good at 10 GHz -- remember 
that you increase phase noise by 20 dB for 10 times multiplication.

John


On 3/29/21 12:25 PM, Chris Wilson wrote:
> 
> 
>    29/03/2021 17:20
> 
> Can I use my Ublox NEO-M8T-0-10​  as a LO for  a  modified satellite LNB on 10 GHz? It needs 25 MHz and the Ublox is my only GPS locked source for such a frequency. I want to receive the Es Hail downlink with excellent stability. I can lock the receiver to 10 MHz which is available from my Trimble Thunderbolt. If the Ublox would do I would not have to buy something like the Leo Bodnar GPS. Thanks.
> 
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