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Old 10-18-2009, 11:19 AM
  #72  
olnico
 
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Default RE: Weatronic 2.4 RF diagnostic tool

Hi Jeanfi,

I have checked you file and it looks perfectly fine. I don't think that your trouble comes from the RF link.

Here is the analysis of your data:


Lowest RSSI 1 rx:-82,5 dBm
Lowest RSSI 2 rx:-85 dBm
Lowest frame rx1:63
Lowest frame rx2:64

Average RSSI rx values: -80,5 dBm
Failsafe 0
losses of feedback communication ( 136/168 events ): 3 for a total of 24 seconds.

Lowest RSSI 1 tx: -102,5 dBm
Lowest RSSI 2 tx: -102,5 dBm
Lowest frame tx1: 0
Lowest frame tx2: 0



The jamming must be coming either from downstream of the RF stage ( EMI pickup on the patch cable or Tx module or antenna module downstream of the QC chip ) or up stream of the Rx de-muxing stage ( either in the final dispatch board of the RX upstream of the QC chip or in the servo lines ).

There is also something strange in your log file: the recording starts from no where ( ie not from the original power up ). Also the shape of the RSSI curves is almost perfect. I have never seen such a perfect tub like curve yet on a wea log. This looks strange to me. Was that a flight log ?

Could you fly this system in a quieter environment and post the results here ?

What I could also do at a later stage is send you my system quickly by Fedex so that you could do the same tests with another proven set.