05-09-2023, 05:41 PM
Some really good log plots here, including some zoom in. And I am impressed you are getting 9 minutes of flight time. I have not seen your plane nor heard about it, I wondered if I could tell anything about it from the plots. Whether the plane has a 2S or 3S lipo: I find with 2S lipos and a matek rx the RSNR does not drop to zero, as it has done here on 5 occasions during the 9 minutes but it very quickly bounces back. RSNR falls to zero may be more common with 3S planes. However the lack of any change in any signal parameters with big throttle ups and a down makes me place a bet its a 2S. Its not a 3D plane, they have a very different throttle profile with frequent big changes, up or down, and I see changes in RSSI and RSNR when thr changes.
The plots are doing nothing for the theory that the throttle changes up or down cause tx power jumps. However the falls in RSNR appear a bit related to the jumps: since your signal remains normal (based on RSSI and RQly) while RSNR falls, the ratio of signal to noise may fall due to bursts of noise.
I see you have dynamic power on, and base value of TPWR is 10mw, so I rule out you fly with a RM boxer or a TX12 tx, and I think you must have a RM t16s.
Throughout the flight the RSSI and the RQly are nominal, and really good. On 2 occasions your tx saw the need to jump to 50 mw, and around 15 times to jump to 25 mw. I have had flights with such frequent jumps, and I have decided the jumps reflect the fact that PRCAC is a noisy radio environment, causing falls in RSNR. There are 2 viewpoints:
(a) the tx is working as per its design, no need to worry as RSNR is quickly restored after a jump
(b) if you set the base dyn power to 25mw, you would see a very different log, a near pristine log with basically nothing to see. I know this because I have a tx12 as well as a TX16s, and TX12 has base dyn power of 25mw. I am still considering whether to increase base dyn power on my Tx16s. I don't like RSNR values of zero, no matter how transient.
In another thread I discussed the views in Discord, and Sunjun's method to set the base dyn power to 25mw.
I suggest in plots instead of adding 10 to RSNR, you multiply it by 2. This is because a fall in RSNR of 10 (from 12 to 2) is a very different thing to a fall in RQly from 100 to 90; also the RSNR may be the most sensitive indicator of what is happening with the signal. The RQly and RSSI are nominal throughout while RSNR falls to zero on 5 occasions.
The plots are doing nothing for the theory that the throttle changes up or down cause tx power jumps. However the falls in RSNR appear a bit related to the jumps: since your signal remains normal (based on RSSI and RQly) while RSNR falls, the ratio of signal to noise may fall due to bursts of noise.
I see you have dynamic power on, and base value of TPWR is 10mw, so I rule out you fly with a RM boxer or a TX12 tx, and I think you must have a RM t16s.
Throughout the flight the RSSI and the RQly are nominal, and really good. On 2 occasions your tx saw the need to jump to 50 mw, and around 15 times to jump to 25 mw. I have had flights with such frequent jumps, and I have decided the jumps reflect the fact that PRCAC is a noisy radio environment, causing falls in RSNR. There are 2 viewpoints:
(a) the tx is working as per its design, no need to worry as RSNR is quickly restored after a jump
(b) if you set the base dyn power to 25mw, you would see a very different log, a near pristine log with basically nothing to see. I know this because I have a tx12 as well as a TX16s, and TX12 has base dyn power of 25mw. I am still considering whether to increase base dyn power on my Tx16s. I don't like RSNR values of zero, no matter how transient.
In another thread I discussed the views in Discord, and Sunjun's method to set the base dyn power to 25mw.
I suggest in plots instead of adding 10 to RSNR, you multiply it by 2. This is because a fall in RSNR of 10 (from 12 to 2) is a very different thing to a fall in RQly from 100 to 90; also the RSNR may be the most sensitive indicator of what is happening with the signal. The RQly and RSSI are nominal throughout while RSNR falls to zero on 5 occasions.