Re: [time-nuts] eBay GPS antenna test results.

2018-02-12 Thread Bob kb8tq
Hi Sitting here casually reading the data sheets for some of the modern Trimble survey receivers - they have gone to 7.2V (just below your 7.5V trigger point) as an antenna supply voltage. Who knows what that might imply relative to this antenna. Bob > On Feb 11, 2018, at 12:44 PM, John

Re: [time-nuts] Allan variance by sine-wave fitting

2018-02-12 Thread Tom Van Baak
Hi Ralph, Nice test. Two comments. 1) Your 5065A is working really well; is it one of Corby's "super" ones? What sort of environmental controls did you have during the run, if any. How long had the 5065A been powered up before you ran the test? 2) Is there a reason you didn't or couldn't make

[time-nuts] Allan variance by sine-wave fitting

2018-02-12 Thread Ralph Devoe
I've been comparing the ADEV produced by the sine-wave fitter (discussed last November) with that of a counter-based system. See the enclosed plot. We ran the test in Leo Hollberg's lab at Stanford, using a 5071a Cesium standard and my own 5065a Rubidium standard. Leo first measured the ADEV using