Thank you for the clarification between a transmatch and an antenna tuner. The original question still remains! Is it unreasonable to believe that the reason we don't see any deviation on our output power metering system is because the internal ALC is constantly adjusting any deviations caused...
I believe most ALC circuits monitor forward power and control the output level. We are not talking about the upper limit of some PA's that use a -1dB compression limit but a closed loop system that maintains a set power level.
In reference to my original question, why can't we see this...
I have been interacting with a local retired communication engineer and his response has been the same as yours. I know and have advocated that matching the xmtr to a feed line does not remove the VSWR from the line. Also moving the VSWR on the antenna side of the transmatch does show a VSWR...
Yes, you are correct, I just assumed that most RF transmitters use some type of feed back loops to maintain a specific output, regardless of moderate VSWR on the feed line. With that being said, I guess my original question seems meaningless? Sorry for taking up your time, although you did...
I believe you covered the majority of our transmitting scenario nicely but left out the closed loop output sensing or ALC that maintains the desired power level.
I am in total agreement with everything with the exception, more information is needed about the sensing circuit (ALC) that actually...
This could be a typical setup: We're transmitting a signal of 100W measured directly out of our Pa / Matching network into coaxial feed line. The feed line has a 52.2 -J0.31 Ohm impedance. The length of this coaxial feed line is 100'. The matched line loss of this feed line is .709dB/100' at...