[time-nuts] HP Z3805A

[SAIDJACK at aol.com]

Hello Edgardo,
 
glad you received them well, and within 48 hours from China! Hopefully  
they will work as well for you as for me.
 
I noticed that some of the 60Hz/120Hz artifacts can come through the power  
supply into the 10MHz, so pick a power supply that has a case-ground 
connection,  not just two pins like the normal wall-warts have. That will help 
reduce the  supply noise.
 
On the antenna, we are feeding them from a very low cost 5V automotive  
antenna, and a Symmetricom 1-to-4 splitter with lightning protection (that's  
important!). Works very well for us. I am sure most 5V antenna will work just 
 fine.
 
Hopefully they will work well for you too. BTW: try Ulrich Bangerts Z38xx,  
that program can be used to initiate the auto survey and monitor progress.
 
Bye,
Said
 
 
 
 
In a message dated 9/14/2012 11:49:32 Pacific Daylight Time,  
edgardo at iptel.net.mx writes:

Dear  Said,  


Good afternoon. I bit the bullet and ordered two HP Z3805A GPS units from  
the asian source you kindly advised. The units are really nice and brand new 
 looking! The deal was smooth as silk and via DHL, the delivery took less 
than  48 hours to my door. 


I preferred to buy two bare units to compare them side by side, instead  of 
buying the complete kit. Now I will have to search for a decent power  
supply and antennas for them. I plan to use a single GPS antenna and an HP RF  
splitter to feed both units. 


I have two questions regarding this and your experience will be certainly  
appreciated.


a. What kind of antenna should I use for them? Any GPS antenna matching  
the instrument`s output voltage should do the job?
b. I am thinking of picking a 24VDC 2.5A power supply. From an HP Z3801A  
manual (I can not locate the manual for the Z3805A) it reads that in terms of 
 voltage and current consumption I should be fine. 
c. How critical is the power supply design in terms of noise to feed the  
Z3805As? I am planning for a well regulated source but I find the switched  
power supplies interesting for this purpose.


Thank you beforehand for your time and comments. Please be sure I will be  
grateful for that.


Regards,

 
 
 
 





Edgardo