new Alpha + settings

hi Jim
I have a problem with the new “Alpha+” Settings are not saved.
I tried several times to return to the default settings,
but when turned on, the setting is always the same as for l1 (single frequency).
I’m using the version RTKViever2.
when trying to change the type of configuration Alpha RTK reseiver,
I get an error message. In the attached photo.

what’s below
is the error details:

See the end of this message for details on invoking
just-in-time (JIT) debugging instead of this dialog box.

************** Exception Text **************
System.NullReferenceException: Object reference not set to an instance of an object.
at RtkViewer.CheckFirmwareUpdateForm.BwFwCheckRunWorkerCompleted(Object sender, RunWorkerCompletedEventArgs e)
at System.ComponentModel.BackgroundWorker.OnRunWorkerCompleted(RunWorkerCompletedEventArgs e)

************** Loaded Assemblies **************
Assembly Version:
Win32 Version: 4.8.4121.0 built by: NET48REL1LAST_C
CodeBase: file:///C:/Windows/Microsoft.NET/Framework64/v4.0.30319/mscorlib.dll

Assembly Version:
Win32 Version:
CodeBase: file:///C:/Users/Administrator/AppData/Local/Polaris/RTK_Viewer2/RtkViewer2.exe

Assembly Version:
Win32 Version: 4.8.4121.0 built by: NET48REL1LAST_C
CodeBase: file:///C:/Windows/Microsoft.Net/assembly/GAC_MSIL/System.Windows.Forms/v4.0_4.0.0.0__b77a5c561934e089/System.Windows.Forms.dll

Assembly Version:
Win32 Version: 4.8.4001.0 built by: NET48REL1LAST_C
CodeBase: file:///C:/Windows/Microsoft.Net/assembly/GAC_MSIL/System/v4.0_4.0.0.0__b77a5c561934e089/System.dll

Assembly Version:
Win32 Version: 4.8.3752.0 built by: NET48REL1
CodeBase: file:///C:/Windows/Microsoft.Net/assembly/GAC_MSIL/System.Drawing/v4.0_4.0.0.0__b03f5f7f11d50a3a/System.Drawing.dll

Assembly Version:
Win32 Version: 4.8.3752.0 built by: NET48REL1
CodeBase: file:///C:/Windows/Microsoft.Net/assembly/GAC_MSIL/System.Configuration/v4.0_4.0.0.0__b03f5f7f11d50a3a/System.Configuration.dll

Assembly Version:
Win32 Version: 4.8.4121.0 built by: NET48REL1LAST_C
CodeBase: file:///C:/Windows/Microsoft.Net/assembly/GAC_MSIL/System.Core/v4.0_4.0.0.0__b77a5c561934e089/System.Core.dll

Assembly Version:
Win32 Version: 4.8.3752.0 built by: NET48REL1
CodeBase: file:///C:/Windows/Microsoft.Net/assembly/GAC_MSIL/System.Xml/v4.0_4.0.0.0__b77a5c561934e089/System.Xml.dll

Assembly Version:
Win32 Version: 4.8.3752.0 built by: NET48REL1
CodeBase: file:///C:/Windows/Microsoft.Net/assembly/GAC_MSIL/System.Management/v4.0_4.0.0.0__b03f5f7f11d50a3a/System.Management.dll

************** JIT Debugging **************
To enable just-in-time (JIT) debugging, the .config file for this
application or computer (machine.config) must have the
jitDebugging value set in the system.windows.forms section.
The application must also be compiled with debugging

For example:

When JIT debugging is enabled, any unhandled exception
will be sent to the JIT debugger registered on the computer
rather than be handled by this dialog box.

Hi Igor,
Your Alpha+ is running 3-constellation (GPS, BDS, Galileo) reception firmware, and the old “type configuration” UI should be removed from RTK Viewer. Will do that in next version.
You can just restart RTK Viewer.
Sorry to cause the inconvenience.


Hi Jim
the problem is not over i cant use
Alpha +.

I cant save the setting as a base,here are my actions:
1.set factory defaults
always get RTK Rover GPS+BDS+GAL
2.Configure as Base
3.restart RTK Viewer.
4.I get RTK Base GPS+Beidou (single frequency)

Even as a single frequency,cant connect to your
RTK base redirect service.

About the single frequency receiver issue, I will repeat your procedures and get you a solution tomorrow.

As for the caster connection issue, I will reply you in email. (due to some login information involved)

Hi Igor,
Please use “Updates->Check Firmware Update” to update firmware. This may resolve your first issue.
Let me know if it works.


Hi Jim,
I use RTK Viewer+
when I try to update, get the following message:
You are running the latest version of Alpha firmware.
please give a link to download the new version.

Hi Igor,
Do not use RTK Viewer version1.x together with Alpha+ devices; that is for Alpha. Please use RTK Viewer 2.x instead.


Jim, I’m waiting for a solution to the problem.
please read again what I’m writing
see the post above, I’m using the version
RTK Viewer 2.x

Hi Jim,
I really hope to get a working version of Alpha +,
your single frequency “Alpha” works fine,
I hope the dual-frequency will be even cooler.

Hi Jim,
After upgrading to dual-frequency mode, I was able to set my Alpha to “Base” mode.
Now I get corrections and fix.
But when you configure the transmission in RTCM mode, an unstable connection with your RTK base redirect service.
so I have made an order for another alpha so far, maybe you will fix this bug later and I can connect with emlide receiver.
I also have a question:
How can I increase data collection time?
the program GNNS_Viewer had this option,
but that was for single frequency alpha.

Hi Igor,
I can send Alpha+ base correction data to F9P evb (via Redirect Service) and get correct fix result.

You can use another tool GNSS Viewer to configure survey time.

In GNSS Viewer’s, go to RTK–>Configure RTK Mode and Operational Function, and follow the steps

  1. Set RTK Mode as “RTK base mode”
  2. Set RTK Operational Function as “Survey Mode”
  3. Set Survey Length as your preferred number of secs
  4. Set Attribute as “Update to SRAM + Flash”
  5. OK

Hi Djim,
the link to GNSS Viewer is not working,
file weight 22 bytes,please reload.
I updated to the latest version RTKViewer2 April 8th version,
but in RTCM mode,from your application cant connect to
RTK redirection service.In skytraq mode instant connection.

The link is fixed. Please try again.

My STRSVR settings screens and RTK Viewer video.


Jim, try connecting from your android application Polaris NTRIP Server.

…in RTCM mode…

I just uploaded a new app, which can work as NTRIP server or client.

Please wait for a while when it is under examination. I will let you know when it is on Android Play store.

Thank you, you are the best !

1 Like

started testing a little new alpha +
and a new application for android.
Now it is clearly visible graphically,
connection to the server
and the number of satellites.
But only get RTK fix for a short time,
very quickly jumps from GPS- to flat- to fix
and back.
the number of satellites is sufficient.
what do you advise ?
perhaps disable Glonass?

You may try this. Perhaps it helps the position fixing in your environments.