Re: [time-nuts] Z3805A high value PU

2013-04-17 Thread Charles P. Steinmetz
Mark wrote: For the first 6 hours PU stayed at 432us, then it dropped sharply to 5.6us and then slowly climbed to 18us. Doesn't seem right to me. Nothing it does in the first 6 hours has anything to do with anything. (1) The oscillator will be swinging around wildly (comparatively

Re: [time-nuts] Z3805A high value PU

2013-04-17 Thread Mark C. Stephens
Many thanks, mark -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Charles P. Steinmetz Sent: Wednesday, 17 April 2013 4:03 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Z3805A high value PU Mark

Re: [time-nuts] Z3805A high value PU

2013-04-17 Thread cfo
On Wed, 17 Apr 2013 08:26:08 +, Mark C. Stephens wrote: On a more serious note, I have rack mounted both clocks with UPS power and they shall not be disturbed. http://www.vk2hmc.net/blog/?p=86 Many thanks, Is it wise to install an unregulated fan inside the 3805 housing , so close

Re: [time-nuts] Z3805A high value PU

2013-04-17 Thread Mark C. Stephens
: Thursday, 18 April 2013 4:32 AM To: time-nuts@febo.com Subject: Re: [time-nuts] Z3805A high value PU On Wed, 17 Apr 2013 08:26:08 +, Mark C. Stephens wrote: On a more serious note, I have rack mounted both clocks with UPS power and they shall not be disturbed. http://www.vk2hmc.net/blog

[time-nuts] Z3805A high value PU

2013-04-16 Thread Mark C. Stephens
Dear Fellows, I recently purchased a pair of Z3805A off eBay seller tommy_chou. I have fired them up with a MaxRad 26db timing antenna attached to each. The antennae have a clear view of most of the sky. The receivers are having no problems seeing enough satellites. The problem I am seeing on

Re: [time-nuts] Z3805A high value PU

2013-04-16 Thread Charles P. Steinmetz
Mark wrote: I recently purchased a pair of Z3805A The problem I am seeing on both is the predicted uncertainty is high compared to other receivers I have seen. I am experiencing a PU of ~8us for the first and ~24us for the second. My questions are, What could be causing such bad figures?

Re: [time-nuts] Z3805A high value PU

2013-04-16 Thread Mark C. Stephens
of precise time and frequency measurement Subject: Re: [time-nuts] Z3805A high value PU Mark wrote: I recently purchased a pair of Z3805A The problem I am seeing on both is the predicted uncertainty is high compared to other receivers I have seen. I am experiencing a PU of ~8us for the first

Re: [time-nuts] Z3805A high value PU

2013-04-16 Thread Jim Lux
On 4/16/13 8:28 PM, Mark C. Stephens wrote: Actually, before I plugged the GPS antenna into the second unit, I checked out where it last called home: LAT N 36:01:05.225 LON E 128:41:48.761 HGT+1214.14 m (MSL) Mt Palgong, according to Google Earth Lots of transmitter towers up