Re: [time-nuts] New (refurbished) LPRO-101 GPSDO

2010-10-18 Thread Rob Kimberley
-Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Bob Camp Sent: 17 October 2010 16:09 To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] New (refurbished) LPRO-101 GPSDO Hi The antenna should do fine just

[time-nuts] New (refurbished) LPRO-101 GPSDO

2010-10-17 Thread David McClain
I just received my LPRO-101 with a GPSDO control on it, from TenMhz.com. After fiddling with getting a good placement for the GPS antenna, so that it doesn't keep losing the satellites, I have been attempting to discipline the oscillator for more than 24 hours. At this point, the LED has

Re: [time-nuts] New (refurbished) LPRO-101 GPSDO

2010-10-17 Thread Bob Camp
Hi Straight out of the box, an LPRO should be within 2x10^-10 after an hour on power. That's with no disciplining and just normal luck in terms of it getting banged about in shipment. That also assumes it was set properly before it was shipped. As long as your antenna is outdoors with a good

Re: [time-nuts] New (refurbished) LPRO-101 GPSDO

2010-10-17 Thread mike cook
Le 17/10/2010 11:55, David McClain a écrit : I just received my LPRO-101 with a GPSDO control on it, from TenMhz.com. After fiddling with getting a good placement for the GPS antenna, so that it doesn't keep losing the satellites, I have been attempting to discipline the oscillator for

Re: [time-nuts] New (refurbished) LPRO-101 GPSDO

2010-10-17 Thread David McClain
Well, not exactly an urban jungle here, but there could be multipath off the neighbor's home... Thanks for that suggestion. I will try moving the antenna about. When I first deployed it, the GPS would go solid reception for a while, and it actually claimed to lock, after only an hour or

Re: [time-nuts] New (refurbished) LPRO-101 GPSDO

2010-10-17 Thread Bob Camp
Hi The antenna should do fine just sitting on the roof. It will do better sitting over a ground plane. Does the antenna have a clear view of the sky to the south? Bob On Oct 17, 2010, at 10:15 AM, David McClain wrote: Well, not exactly an urban jungle here, but there could be multipath

Re: [time-nuts] New (refurbished) LPRO-101 GPSDO

2010-10-17 Thread David C. Partridge
Also Regards, David Partridge -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Bob Camp Sent: 17 October 2010 16:09 To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] New (refurbished) LPRO-101 GPSDO

Re: [time-nuts] New (refurbished) LPRO-101 GPSDO

2010-10-17 Thread David McClain
Hi Bob, Well,... sort of... I live in a rather cramped housing development, where the neighbors wall is about 20 feet from my window, and his wall is about 12 feet high. So that seems rather marginal for a southern view from the windowpane of my lab. As it happens, I moved the antenna

Re: [time-nuts] New (refurbished) LPRO-101 GPSDO

2010-10-17 Thread Bob Camp
Hi Depending on your local antenna restrictions, you may or may not be able to put up a proper outdoor antenna. If you can, it's well worth it. They are available for $40 on the e-place. The normal ones mount on the end of a piece of iron pipe, so setting up a mound is normally pretty easy. I