[time-nuts] HP 58540A Phase Noise Improvements

[Rob Kimberley]

Hi Paul,

While there are certainly oscillators out there approaching the -160dBc at 
1KHz (OSA BVAs spring to mind), some of the phase noise performance of the 
OCXO will be degraded by the GPS receiver itself. Not sure from my 
experience that this sort of figure would be achievable in practice.

I'm interested to see what other comments you get.

Good luck.

Rob Kimberley
----- Original Message ----- 
From: "Paul Christensen" <pchristensen at ieee.org>
To: <time-nuts at febo.com>
Sent: Friday, July 07, 2006 4:53 PM
Subject: [time-nuts] HP 58540A Phase Noise Improvements


>I am currently using a HP 58540A GPS-disciplined OCXO as the frequency
> reference to an ICOM IC-7800 transceiver.  I am looking to improve the 
> phase
> noise performance of the 58540A.
>
> Although some HP 58540A units contain the MTI 230-series OCXO, I have been
> considering the MTI 260 series for its superior phase noise performance 
> but
> it uses a larger PC board footprint.  The PC board in the 58540A seems to
> have accommodated several OEM's form factors as evidenced by the PC board
> silk-screen.
>
> Does anyone have any suggestions as a replacement OCXO with excellent 
> phase
> noise approaching -160 dBc @ 1 kHz?  Are there any special precautions or
> other alignments required when dropping in a replacement OCXO?  Thanks!
>
> Paul
>
>
>
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