Products > Test Equipment
bg7tbl gpsdo master reference
mojoe:
Thanks for the reply. I understand that the PPS is better after the survey, as that was the reason for doing it. I also know that it takes a while for an oscillator to settle. I'm hoping that someone who knows the intricacies of LH will respond, and enlighten us all.
FPSychotic:
Hi, I'm trying to update the GPSDO version 2017 , without LCD, with a neo-m8t, I think it is soldered properly,I did 3 times ,it is recognised in the port com and u-center will connect, but it is mot showing any data or loading any config.
Had anyone this issue?
Does anyone knows other place to ask?
Electro Fan:
Hi, I have an older (2018-06-05) BG7TBL GPSDO and it has been an excellent performer. I use the GPSDO and a BG7TBL distribution amplifier to provide a 10 MHz ref input to various test equipment such as the freq generator and freq counter shown below along with an oscilloscope and a spectrum analyzer and a few other pieces of test equipment.
I'm interested in adding a new BG7TBL GPSDO that will handle 2 or more GNSSs concurrently (probably GPS and Galileo but others and more - up to 3 or 4 would be of interest).
If possible I'd like to have the multi GNSS unit with the LCD display.
Just checking to see what the latest date code anyone has for a BG7TBL GPDSO that supports multiple systems, and also what the latest u-blox concurrent GNSS timing module anyone has found inside (M8, M9, M10 or some variants of these)?
Also, if anyone has determined how much if any 10 MHz accuracy might be gained by configuring the GPSDO for one vs 2 vs 3 or possibly 4 systems that would be interesting to hear.
Thanks for any help with any of this. EF
Ringmodulator:
Hi Electro Fan,
it looks like the wafeform generator and the counter are synced to the same source, probably the gpsdo (and this is just a guess and might be wrong).
In this case the displayed results on the counter do not say anything about the quality/accuracy of the gpsdo.
I own two gpsdos, of which one is a bg7tbl which can use up to three gnss (M8T) and FA-2 /FA-3.
Tony Albus has a video on YT on accuracy vs multiple GNSS.
https://www.youtube.com/@TonyAlbus
He has multiple ones on gpsdos and I dont remember which one it was. You may find it with the search function.
Regards
Chris
Electro Fan:
Hi Ringmodulator,
Thanks for your comments, I appreciate it. I read a number of your earlier posts and they have always been helpful - Thx!
Your comments motivated me to run a few quick tests as shown in the attachments.
If you or anyone else would like to see some other tests let me know.
Part 1: with attachments
Edit Notes:
Image 1 - is with 30MHz signal from generator with GPSDO Ref input to Generator and Counter
Image 2 - is same thing but over longer time
Image 4 - shows 30 MHz signal from generator without Ext Lock (which can be seen in post 1002 above)
Navigation
[0] Message Index
[#] Next page
[*] Previous page
Go to full version