[time-nuts] Trimble/Nortel 45000 GPS Locked ReferenceOscillatorboard

[quartz55]

I've tried the antenna in all locations within 200' of my room and nothing makes any difference.  I still need to take the unit somewhere there's nothing in the way and see what it does there.
  ----- Original Message ----- 
  From: Erno Peres 
  To: time-nuts at febo.com 
  Sent: Tuesday, December 24, 2013 10:20 AM
  Subject: Re: [time-nuts] Trimble/Nortel 45000 GPS Locked ReferenceOscillatorboard



  Dave,

  my opinion is that this big tree around your GPS antenna causing a  lot of " trouble "
  as especially when the tree are wet.......

  Rgds Ernie.




  -----Original Message-----
  From: quartz55 <quartz55 at hughes.net>
  To: Discussion of precise time and frequency measurement <time-nuts at febo.com>
  Sent: Tue, Dec 24, 2013 4:10 pm
  Subject: Re: [time-nuts] Trimble/Nortel 45000 GPS Locked Reference Oscillatorboard


  That Nortel board you have there looks exactly like the board I got in my Nortel 
  TBW50AA GPSTM.  You can find the book on-line, look for "Dual Voltage Global 
  ositioning System Timing Module (GPSTM) OEM General Specification".  Yes the 
  ower supply is speced from 24 to 48VDC plus or minus.  They don't specify AC, 
  ut since the bridge is there it will work. 2.08A warm up and .6A at 36VDC steady 
  tate.
  I'd like to see some of your LH traces if you don't mind, especially the osc 
  race. I don't seem to be able to get my osc trace less than ~400 ppt/div. You 
  an see pics of my unit and traces from LH here http://s251.photobucket.com/user/DogTi/library/time?sort=3&page=1
  Dave
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