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, edga...@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 _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.