When the power first comes up, what is the text that appears in the RS232 right at the beginning?
It might look something like this..
:40:45 $GNTXT,01,01,02,u-blox AG - www.u-blox.com*4E
19:40:45 $GNTXT,01,01,02,HW UBX-M80xx 00080000 *43
19:40:45 $GNTXT,01,01,02,ROM CORE 2.01 (75331) Oct 29 2013 13:28:17*4A
19:40:45 $GNTXT,01,01,02,PROTVER 15.00*01
19:40:45 $GNTXT,01,01,02,GNSS OTP: GPS GLO, SEL: GPS GLO*67
19:40:45 $GNTXT,01,01,02,ANTSUPERV=AC SD PDoS SR*3E
19:40:45 $GNTXT,01,01,02,ANTSTATUS=DONTKNOW*2D
19:40:45 $GNTXT,01,01,02,LLC FFFFFFFF-FFFFFFED-FFFFFFFF-FFFFFFFF-FFFFFF69*3E
19:40:45 $GNTXT,01,01,02,RF0 dev ok*04Hello.
No. I wrote U-Center can display the NMEA data. The U-blox neo 7m could not be controlled at the moment.
Another problem I have noticed yet.
On my two notebooks (with docking station) The GPSDO is misinterpreted as any pointing device.
The cursor jumps over the display and menus are activated indiscriminately.
Currently, the set up only works on my old Core2Duo tower.
Jörg
Note that that particular output is from a questionable "M8N" board that I bought on ebay. A genuine M8N would have both ROM and flash firmware revisions displayed, not just one. My board appears to lack the EEPROM it is supposed to have.
Also, it may have an OXO, not a TCXO.. Which is another move to save a few pennies.. Its understandable, as I paid around $20 for my module, very little.
For what it's worth, the actual PPS output stability is almost identical across the ublox line, regardless of variant or temperature compensation on the oscillator. I've tested close to half a dozen ublox branded modules as old as the LEA 5T and as recent as the M8T and the PPS output is essentially identical. Of course there are different output options on the more recent timing grade devices that would be more impacted by oscillator stability, but the PPS is the same.
Still a few views on the last generation of the BG7TBL GPSDO.
Everything is fine also connect to PC with RS 232 cable. U-Center and Lady heaters work easily with this device and the NMEA data is displayed in the software.
best regards
Hello Ted.
First, in the bottom line, the device displays "GPS not fix".
Later, the 10 MHz is displaed, with a deviation of about 0.0120 Hz.
After about two or three hours, the letter "L" is displayed as the first character. Then only the last point varies.
I suppose it means the PLL is locked.
Regards. Jörg
Hello Ted.
First, in the bottom line, the device displays "GPS not fix".
Later, the 10 MHz is displaed, with a deviation of about 0.0120 Hz.
After about two or three hours, the letter "L" is displayed as the first character. Then only the last point varies.
I suppose it means the PLL is locked.
Regards. JörgSo what is the internal frequency counter referenced to then?
Sent from my SM-G900I using Tapatalk
Jorg, did I correctly interpret your posts and does that new unit, with the LCD display. have a Trimble OCXO?
Hello everyone. I have some recent pictures in chronological order. In fact, I currently have only patch antenna indoor at the window. . . . . . Best regards. Jörg
Re. Post 'Reply #531, by Jorg:Hello everyone. I have some recent pictures in chronological order. In fact, I currently have only patch antenna indoor at the window. . . . . . Best regards. Jörg
Hello Jorg: Thank you for the LCD photo series presentation of your GPS results. This is great, and I like that the "L" stays there as long as the GPS is Locked, and apparently with a 4D Fix. I'm even happier now that I ordered one of these, as I have been interested in it ever since finding it on ebay (Reply #484, https://www.eevblog.com/forum/testgear/bg7tbl-gpsdo-master-reference/msg1379350/#msg1379350). You provided the confidence for me that this is a very nice unit, and that now I won't have to keep my computer connected to my GPS to know its status. The LCD now says it all (enough anyway) for me. And of course I will now be able to use a fully compatible GPS application to see its complete status with time offset error, etc.
You have done a lot of work here for us. Thanks and cheers, Ted
Jorg, which antenna are you using now? How does it differ from the one supplied?
The new BG7TBL 10MHz GPSDO with a LCD Display
https://www.ebay.com/itm/Latest-10MHZ-SINE-WAVE-Sinewave-GPS-DISCiPLINED-CLOCK-GPSDO-with-LCD-Display/112700839490?hash=item1a3d7e5642:g:TqQAAOSwPPpaOhYT