[time-nuts] Software Sawtooth correction prerequisites?

[Jason Rabel]

I got a few of them off eBay a long time ago, it doesn't appear the seller
has any more of them (they were removed from some other equipment IIRC).

I still have two of the Superstar II receivers. They are older OEM models
with the 4mb flash (all the new firmwares require the 8mb flash) so they are
not firmware upgradeable. I scrounged up some PDFs with basic info, their
pinout is very similar to the older Rockwell Jupiter receivers. Anyhow, yes
they do have the Rakon 10 MHz TCXO on them.

I was going to do something with these, but I know I'll never get around to
it and I'm sure one of you guys could put them to better use.

$25 shipped takes the pair of receivers and a pair of 9" MCX-SMA pigtails.
Contact me off-list... first come first serve.

Jason


> The Novatel SuperstarII receivers use an on board Rakon 10MHz TCXO (made 
> a little (120km) to the North of me) local oscillator which can be 
> disconnected with relatively little surgery and replaced with a piece of 
> thin coax and a connector. However the required amplitude is relatively 
> small - easily fixed with a pair of resistors - typically the output 
> from the onboard TCXO itself has to be attenuated.
> Magnus acquired some of these cheaply, however even the new price isn't 
> too steep. UNSW has used these receivers in geodetic survey/monitoring 
> applications. The code phase field data from some of these exhibits 
> encouraging stability (about 5 -10x better than the oscillator specs) 
> when averaged over a few seconds even with the standard TCXO.
> 
> If you want to roll your own GPS receiver the MITEL/ZARLINK chipsets use 
> a 10MHz reference.