[time-nuts] GPS orthodontics: sawteeth & hanging bridges

[SAIDJACK at aol.com]

Hi,
 
it's funny, Randy seems to be the only engineer here really familiar  with 
the Motorola innards.
 
Aren't there any Motorola GPS engineers here??
 
Would love to hear some of the nitty gritty details of how the  
firmware/hardware works, what you guys think about the iLotus products, etc  etc.
 
For example, do the receivers get calibrated during production to minimize  
the effects of SAW filter variations etc? Could more modern tuners that use  
digital filters instead of SAW's perform better (see digital TV tuners from  
Xceive, NXP, etc)? Would it make sense to replace the TCXO with a good OCXO and  
use that crystal's output instead of a divided-down 1pps? How much does the  
Antenna LNA's noise figure affect the stability?

The NDA's will hopefully expire soon, so please do spill out the  secrets!!
 
bye,
Said