[GPS_Standard] Introduction

[Zack Widup]

Hi All,

I'm new to this group and this is my first posting here.

I made a couple boards from the PDF files of the circuit patterns that 
Bert has supplied.  I also programmed a couple PIC's already for them. I 
can post some photos at some future date.

I have a few Isotemp model 118 OCXO's that I got on eBay for about $15 
each.  One was DOA but I have three that work.  These are very stable 
units, warm up in about 15 minutes and have a 0.3 ppm variation with a  
control voltage of 8 volts supplied by the OCXO, negative slope.  So I 
plan on trying one of them out with the circuit.  I also plan on getting 
an HP10811 unit on eBay to play around with.

I also have a bunch of Jupiter 12 GPS engines around here and will try the 
circuit using a couple of them.

I do have one question - I ordered a couple LTC1485's frmo Digikey and 
they accidentally sent me LTC485's.  They are sending me the 1485's but I 
wonder if the 485's will also work in the circuit?

I'll let you all know how this works out when I get it all put together.

I plan on using these as reference oscillators for microwave transverters.  
I have all my transverter LO's from 2304 through 10368 MHz phase-locked
to a 10 MHz source.  The Isotemp OCXO's have been very stable and accurate 
as free-running devices so far but I think the extra accuracy will come 
in handy as I go up the bands to 24 GHz, 47 GHz, etc.

73, Zack W9SZ