RCU Forums - Weatronic RF link quality tools/database

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Weatronic RF link quality tools/database

The original "Weatronic diagnostic tool"

http://www.rcuniverse.com/forum/m_9129187/tm.htm

having turned into a product support thread, I am making a new one about the original purpose:
Giving the users of this system a tool to diagnostic their system and a database to compare their system performance with others.

Please, if you have any general support question, use the other thread. If you want to post your datalink results of if you have any RF link quality doubt or question, use this thread. I am looking for as much feedback as possible. Thank you.

I am also finishing a comprehensive article about Weatronics advanced programming and tips that will publish around the end of the year.

First of all the method to be able to display meaningful data about the Rf link quality.

After the flight, download the data to your computer.

Open GigaControl 2.50
Go to the the Nav View window.

Configure Nav View as follows:

Right panel upper window Rx data ( RSSI1, RSSI2, Frames1, Frames2 ):

Erase all the data on the right panel.
Hit the + button and select the following:
'receiver', then RSSI 1rx, then RSSI 2rx, then frame rx1, then frame rx2.

http://www.geohei.lu/olin/data/model...up%20right.jpg

Right panel lower window Tx data ( RSSI1, RSSI2, Frames1, Frames2 ):

Hit the + button and select ' diagram below'.
Select again the + button and the following:
'transmitter' then RSSI 1tx, then RSSI 2tx, then frame tx1, then frame tx2.

Left panel alfa numeric values and error codes:

Right click on the title box and select 'hide all columns'

http://www.geohei.lu/olin/data/model...tup%20left.jpg

Then right click again on the title bar and select 'receiver' then Frame rx 1, then Frame rx 2, then status rx ( optionally Failsafe ).
Do the same thing with 'transmitter' then frame tx 1, frame tx 2, then status tx

http://www.geohei.lu/olin/data/model...20left%202.jpg

You should end up with the following display:

http://www.geohei.lu/olin/data/model...p%20config.jpg

You can now load the nav file by hitting the 'open' button and selecting the file target.
The data log will open automatically.
Center the graph to the flight zone ( you will recognize it since the RSSI start to drop when the plane goes away from you and the curve is like a "bathtub") and zoom it to get rid of the post and pre flight crap.

Select the wrench button on the right panel and select 'Y-axis scaling' then 'scale possible values'

http://www.geohei.lu/olin/data/model...2%20config.jpg

This option will enable you to evaluate the values compared to their maximum. It is very important to select this option otherwise the graph will not be meaningful since the scale would change every time you move into the graph: the program is configured to show the 'visible values' by default.

If you see a zone of the flight that you want to evaluate more precisely, then center it on the dotted line, dragging the horizontal button. Then left click on the dotted line. This will automatically pull the associated line on the left alfa numeric panel and highlight it. Note that these lines are only recorded every second on the tx side with the micro receivers. The big receivers can record at a much higher rate on the rx side ( rx micro sd card ).

In the example below I have zoomed on an event in flight 2 and clicked on the dotted line:

http://www.geohei.lu/olin/data/model...202%20zoom.jpg

The line at 317s is automatically displayed in the left panel and highlighted. I then just have to read the values...

Note that the RSSI values can fluctuate between -110 dBm and -8 dBm, -8 dBm being the highest value ( best reception ).

There are 100 frames per second of which 45 source frames ( PPM mode, PCM modes would give you 25 to 35 source frames ) . Anything below 100 means that you have lost some of the frames( like the A,B,L,R data on the Spektrum flight log ). The control frames being more than doubled in PPM and quadrupled in PCM ( 100 frames transmitted for 45 / 35 source frames ) the RF link is obviously very redundant.

The error codes are shown on the data window for both the Tx and the Rx. A new very nice feature of Gigacontrol 2.50 is that when you stop your mouse arrow on an error code for a while, you'll see a comment window popping up with the code description. So no need to decipher the code with the separate code list anymore :).

PLEASE send the logs with the proper formatting. Here is an example of a log screen shot that was sent to me for analysis. It is completely meaningless because the person did not select the "scale possible values" option:

http://images.rcuniverse.com/forum/u...30/Om32344.jpg