NTZANIS wrote:
Why some mentioned spikes and driving that amps is dangerous ,is the pro create spikes is that in software is spikes really exist?
The following info was published in Telegram test group in early Oct'22 (Alpha stage):
Regarding power "jump", which we all have reported earlier.
Conditions: first TX after power up transceiver or first TX after switching to new band. And assumption was that this "jump" will affect sensitive (MOSFET or LDMOS) external power amps.
My latest measurements are showing that there is no real power "jump". However, according to EE, current power meter tries to 'emulate' analogue (needle) reading - and that what have confused us all.
My proof is as following, below.
Setup
- 100W dummy load
- Power from SS2DX below 20W.
-
AD8310 based SWR/Power meter, displaying actual FWD and REF voltage reading, plus power in watts decimals; measurement interval is 1ms.
If you set playback speed (I use VLC) to 0.25, (or, alternatively, go by frame), it is easy to see, that in the first recorded example the ESDR3 power meter "jumps" to 16.6W, then "returns and stabilizes" to 15.1W (representing deviation of 1.5W - that is really big). At the same time, the external power meter detects output power in range from 18.5 to 18.7W (deviation of 0.2W and is not on start TX only, but across all TX period, which means this might be construction deviation or interference).
The following few tests in recording are to display, that the above behaviors remains constant in all scenarios in question: switching between bands, or stop-start SS2.
Hopefully, this will clear the misinterpretation.
I have already spoken to EE, they will see if it is possible to make different modes to in-build power meter, i.e. make is switchable (by user) between "emulation" and "real".
If you can make your own tests on your SS model - this would be good. I did not check any model except DX.
Video:
mega.nz/file/PVpE1YpI#jHltLel5PgpZcjxevuE9gNEpbsqmpGoIwK8P6abYIO4