[time-nuts] A few questions about Tboltmon

[Chris Waldrup]

Hi Bryan,




I didn't do that. Is this something accessible under one of the tabs?




Chris



—
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On Thu, Aug 6, 2015 at 5:21 AM, Bryan _ <bpl521 at outlook.com> wrote:

> Did you do 48 hour precision first survey first to get an accurate Lat/Long/ altitude?. You will probably need to start with a cold reset to erase any previously stored data and then perform the survey.
> -=Bryan=-
>> Date: Wed, 5 Aug 2015 19:16:23 -0700
>> From: kd4pbj at gmail.com
>> To: time-nuts at febo.com
>> Subject: [time-nuts] A few questions about Tboltmon
>> 
>> Hi,
>> 
>> 
>> I got my new Thunderbolt up and running this past weekend but I have a few questions. I understand Lady Heather is a better program, and I have downloaded it. However right now I am trying to get things right with Tboltmon first. I had used it with my previous GPSDO, a Starloc II. I hate to say but the Starlic just worked, so I didn't pay much attention to Tboltmon other than to see that I was seeing satellites. Please forgive me if some of the questions may sound simplistic, but I'm sort of new to being a time nut. 
>> The Thunderbolt is brand new in package. I purchased a Power One open frame supply from EBay that was also new old stock. Before connecting it to the Thunderbolt, I went ahead and ordered new electrolytic caps from Mouser and spent last Friday night recapping the Power One box. I measured the outputs with a DMM to make sure I had 5 V, -12 V and 12 V. 
>> Noticing that in my old antenna location I could now only see 1-2 satellites (trees have grown a bit) I moved the antenna to the roof of my house, attached to a plumbing vent pipe, with a completely open view of the sky here on top of a mountain in Tennessee. 
>> 
>> 
>> Here's what I am noticing:
>> To start with I simply turned on the Thunderbolt on Saturday morning without doing a warm or cold reset. Within a few minutes, I was seeing six or seven satellites, with the SV boxes lit up green with various numbers which I assume are satellite ID numbers. When I woke up Sunday I was down to seeing only two satellites. The numbers listed were different than the ones I saw before I went to bed Saturday.  But when I unplugged the AC power from the Thunderbolt and plugged it back in, I was back to six satellites. 
>>  I had thought that the GPS satellites I am able to see from my location are fixed 24/7. Do they move and different satellites come into view with rotation of the earth?
>> I did a warm reset when I got up at 4:45 this morning and when I got home, four satellites were still green on Tboltmon. About an hour ago I went ahead and did a cold reset. 
>> I now have 6 satellites where the SV is green, and one with a yellow SV with a value of 7.0. 
>> All critical alarms are green, and all minor alarms are green except position questionable which is yellow. That has been yellow since Saturday. 
>> Under the Disciplining status, Mode is (0) Normal and Activity is (0) Phase Locking. 
>> The Timing Outputs are all over the place and have been since Saturday. Twenty minutes ago I got:
>> PPS  -106588.28 ns GPS
>> 10 MHz  166.08 ppb
>> 
>> 
>> So far today I have gotten the following ppb readings:
>> -41.48
>> 374.30
>> 0.48
>> 0.70
>> 
>> 
>> Should the Timing output variance concern me? 
>> 
>> 
>> Thanks in advance for any help or advice. 
>> 
>> 
>> Chris
>> KD4PBJ
>> Monteagle, TN
>> 
>> 
>> 
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