This forum uses cookies
This forum makes use of cookies to store your login information if you are registered, and your last visit if you are not. Cookies are small text documents stored on your computer; the cookies set by this forum can only be used on this website and pose no security risk. Cookies on this forum also track the specific topics you have read and when you last read them. Please confirm whether you accept or reject these cookies being set.

A cookie will be stored in your browser regardless of choice to prevent you being asked this question again. You will be able to change your cookie settings at any time using the link in the footer.

  • 1 Vote(s) - 5 Average
  • 1
  • 2
  • 3
  • 4
  • 5
SDR AIS available in OpenPlotter 2
maximum gain is not always the best for AIS reception. It is ok for calibration but you should find your best gain. In next versions leaving the gain empty you will apply an auto gain.
(04-21-2020, 06:51 AM)Sailoog Wrote: Please forgive a beginners question. Where do i select this device? In OpenCPN under the connections tab? I am just getting started with the OpenPlotter Basic distribution.

To get AIS data you only need to select a device and set the PPM and the UDP port values. All options in "calibration" section are just to find out the PPM of your device.

Short calibration manual
  • Select a device
  • Click "Initial PPM" to get an approach to your ppm value. The longer you let the program calculate the better result you will get. If you run the program for hours you will get almost the final ppm but if you do not have time just wait for the value to stabilize.
  • Close the program and put the result into the PPM field.
  • Select the GSM band for your zone and try to get the strongest channel clicking "Get Channel".

  • Put the strongest channel into "Channel" field and press "Get PPM". Put the result into the PPM field again rounding the value without decimals and you are done.
  • Provide a UDP port to send AIS data to (default 10110). A Signal K connection will be created for that UDP port.

PPM values have a tolerance of +/-7.
PPM value can be negative.
If you do not find the correct PPM you will not get AIS data.
The PPM value will change with temperature so let the device work for 30 minutes before calibrating.
Some devices are already calibrated (PPM near 0) even with different temperatures.
This is an openplotter app, SDR VHF, not an openCPN plugin or feature. Manual under construction:

Forum Jump:

Users browsing this thread: 1 Guest(s)