Please HELP, my T2 is receiving data on limited Sat bands

Jim Campi

Jim Campi

Active Member
I tried updating my T2 parameters to also receive Galileo and Bediou. This involved making some changes to the parameters tab in Net view as well as sending a Greis command.

I set up in the field hoping to see better performance and it was far worse. I now am receiving only 2 channels each on GPS and Glonass. That translates to a fix of just 4 satellites, if I can even get that. Occasionally it will rise to 7 or 9 but that is transient and gone before the point is accepted.

Can someone please help me get this configured? I am completely fine going back to just GPS and Glonass. I just want my system working again. I have clients that have been waiting a week or more for me to get back and survey their site and all I have are excuses.

Thank you in advance for any help provided.

Sidebar: Something isn't making sense with respect to signal strength. When reviewing the signal strength of of each band for the constallations, the help page indicates that the strongest signals are zero (in red) and weakest as 9 (in blue). It seems like the numbering system is the opposite of that in reality. Also, the color scheme is not intuitive. I would expect red to indicate a problem and green to be the optimal. Moderate signals should be yellow or possibly a color similiar. All day we encounter this configuration when driving. Apparently Red and Blue were chosen as opposite ends of the spectrum? The help page may need to be updated or perhaps I am losing my mind. THIS IS AN AFTER THOUGHT AND SECONDARY TO GETTING MY EQUIPMENT UP AND OPERATIONAL.

Jim
 

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Duane Frymire

Active Member
Jim Campi said:
Is that it?
Click to expand...
Jim, I tried that and found better results with default configuration. Some others said they had better results with what you are trying. I went back to default myself.

To use under new configuration you do have to use D8PSK and rtcm3 msm short for correction stream.
If that doesn't work; If you clear nvram it should go back to default configuration.
 
Adam Plumley

Adam Plumley

Active Member
JAVAD GNSS
Jim, can you set them up on rams and leave it on for a while? I will be able to look in an hour or two.
 
Shawn Billings

Shawn Billings

Shawn Billings
5PLS
Just to be clear, you have to update the OAF on the Triumph-2 and update the firmware to "latest". Is that what you did, Jim.

Also, regarding Duane's comment, you do not have to use D8PSK if you use a 2 second broadcast rate. With 2 second rate, you can use DQPSK, which should have better range over D8PSK. It's also less wear on the radio (duty cycle is cut in half) and there is no loss in performance because the Upsampling can extrapolate the corrections reliably over a few seconds.
 
Shawn Billings

Shawn Billings

Shawn Billings
5PLS
On the LS, you'll need to set your correction type to RTCM 3.2 MSM Short (as Duane said) and you'll need to select the RTK engine profile for four constellations (the default for a standard LS is GPS + Glonass only).
 
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Duane Frymire

Active Member
Shawn Billings said:
Just to be clear, you have to update the OAF on the Triumph-2 and update the firmware to "latest". Is that what you did, Jim.

Also, regarding Duane's comment, you do not have to use D8PSK if you use a 2 second broadcast rate. With 2 second rate, you can use DQPSK, which should have better range over D8PSK. It's also less wear on the radio (duty cycle is cut in half) and there is no loss in performance because the Upsampling can extrapolate the corrections reliably over a few seconds.
Click to expand...
Does that apply to T3 or LS as base also? Or are there too many signals with those bases?
 
Jim Campi

Jim Campi

Active Member
Shawn Billings said:
Just to be clear, you have to update the OAF on the Triumph-2 and update the firmware to "latest". Is that what you did, Jim.

Also, regarding Duane's comment, you do not have to use D8PSK if you use a 2 second broadcast rate. With 2 second rate, you can use DQPSK, which should have better range over D8PSK. It's also less wear on the radio (duty cycle is cut in half) and there is no loss in performance because the Upsampling can extrapolate the corrections reliably over a few seconds.
Click to expand...
Latest firmware on T2, yes. Using msm short and D8PSK.

I don't believe I have data upsampling set (but have frequency set to 0.2). Not sure if the broadcast rate is different from the rover's collection rate.
 
Jim Campi

Jim Campi

Active Member
Shawn Billings said:
On the LS, you'll need to set your correction type to RTCM 3.2 MSM Short (as Duane said) and you'll need to select the RTK engine profile for four constellations (the default for a standard LS is GPS + Glonass only).
Click to expand...
I may need to change the engine profile.

That would not have anything to do with the bands that the T2 tracks, correct?

Mu concern is that the T2 is only seeing 4 signals/bands.
 
Matt Johnson

Matt Johnson

Well-Known Member
5PLS
Jim, I took a look, the radio frequency, channel bandwidth and broadcast period were wrong for your radio settings. You definitely don't want the radio broadcast period set to 0.2.

BASE-SETUP_20230613-16.54.43.png


Also you had the external antenna selected on the LS. Is it actually connected because it was not working.

I think we need to see on Netview to understand why it isn't tracking all the signals.
 
Matt Johnson

Matt Johnson

Well-Known Member
5PLS
Jim,

I notice the satellite icon on the home screen of the LS shows 30 satellites being tracked but when I look at the satellite screen it only shows 10 which is very strange and I don't understand this.


HOME-1_20230613-18.03.00.png


STATUSBAR-SATELLITES_20230613-18.02.52.png
 
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