23-09-2023, 04:19 PM
Today 23 Sept I had 2 flights on my Superextra 1m, one with my Tx12 tx and one with my Tx16s. The SuperExtra has a RM ER6 rx, and over many flights there has never been a control problem. However the appearance of the flight log when its flown with the Tx16s continues to concern me. I attach the 2 logs from today, one is called Superext12 and the other SuperExtra16 with the tx in the plot name.
Comparing the 2 logs, the Tx12 has a better signal quality throughout, based on RQly, RSNR, and RSSI. Looking at the Superext16 plot, you see the tx power TPWR has a baseline 10mw, but there are around 9 jumps in Tx power, including one to 100mw lasting 2-3 secs at 90 seconds. The Tx12 log has no jumps, meaning at no time did the tx detect a potential danger of signal loss. The 12 log had a higher RQly, remaining at 98-100 throughout, while the Tx16 log dropped below 90 on 5 occasions.
The RSNR is clearly lower in the tx16 log. While the tx12 RSNR remains mostly above 10, the tx12 has some zero values and other values below 1-2. Finally the RSSI is better in the tx12, with many values higher than -60 db, while the tx16 its mostly below -60db.
I have detected no evidence of a fault in my Tx16s, rather the lower signal quality manifest today appears to relate to the lower baseline TPWR. I will be changing my Tx16 baseline soon to 25mw to see if it confirms this theory.
I would be interested in comparing flight logs from other Tx16 flights. If you send me a Tx16 csv flight log, I will be happy to plot it. I am working to make a detailed analysis of many of my flights.
Comparing the 2 logs, the Tx12 has a better signal quality throughout, based on RQly, RSNR, and RSSI. Looking at the Superext16 plot, you see the tx power TPWR has a baseline 10mw, but there are around 9 jumps in Tx power, including one to 100mw lasting 2-3 secs at 90 seconds. The Tx12 log has no jumps, meaning at no time did the tx detect a potential danger of signal loss. The 12 log had a higher RQly, remaining at 98-100 throughout, while the Tx16 log dropped below 90 on 5 occasions.
The RSNR is clearly lower in the tx16 log. While the tx12 RSNR remains mostly above 10, the tx12 has some zero values and other values below 1-2. Finally the RSSI is better in the tx12, with many values higher than -60 db, while the tx16 its mostly below -60db.
I have detected no evidence of a fault in my Tx16s, rather the lower signal quality manifest today appears to relate to the lower baseline TPWR. I will be changing my Tx16 baseline soon to 25mw to see if it confirms this theory.
I would be interested in comparing flight logs from other Tx16 flights. If you send me a Tx16 csv flight log, I will be happy to plot it. I am working to make a detailed analysis of many of my flights.