Bob Cunnings wrote: > > I have set up for PSK31 operation with the new firmware and am getting > exactly what I expect. I'm using a peak reading external meter and it > agrees with the power commanded and the power indicated on the K3 > front panel RF meter. First I adjusted audio drive to get 4 bars on > the ALC meter using a pure tone (Digpan tune mode), and could then > adjust power at will with the power indicated on the external peak > reading meter tracking the power control nicely. > > PSK31 "idle" average power is about 50% of the key down (single tone) > power. Using Digipan tune mode I see commanded power equal to > indicated power when the external meter is set to read either peak or > average (of course). When sending PSK31 idle I must have the meter > set to read peak to get agreement with the front panel RF meter, which > makes sense since the change notes state: > > "The RF power bargraph shows approx. peak power..." > > (in the SSB TX POWER CONTROL section). > > Are you adjusting audio drive to get 4 bars of ALC with a pure tone? > > Bob NW8L > >
I have PWR set to 5W. I'm sending a pure tone at 1KHz which is my preferred center frequency for data modes. I increase the LINE level until I get 5 bars of ALC. If I stop when it gets to 4 the ALC display is flickering like the bars keep on being redrawn. I'm getting 5 bars with LINE = 36. However, the power meter reading stops increasing at about 2.8W, when LINE=32 which gives 4 bars. I cannot get more than 2.8W with PWR=5W when sending a pure tone. The meter reads exactly what PWR is set to in CW mode. When transmitting an idle signal the meter reads a bit less than half the value it showed on the pure tone. If I set PWR to 12W I'm currently getting about 6.5W on the pure tone. Now if I set PWR to 12W, giving as I say about 6.5W out, and then back the PWR control down, then the power starts to reduce once PWR gets to 6.5W, and when I get to 5W the meter also shows 5W out. It holds that level on subsequent transmits, and if I transmit an idle tone I get just over 2W shown on my (non peak reading) meter, which is what you would expect at that level. If I then press TUNE, and then try transmiting in DATA A again, either a pure tone or an idle signal, the output reverts to the lower level again. ----- Julian, G4ILO K3 s/n: 222 K2 s/n: 392 G4ILO's Shack: www.g4ilo.com Zerobeat Ham Forums: www.zerobeat.net/smf -- View this message in context: http://www.nabble.com/K3-FIRMWARE-UPDATE%3A---MCU-1.87%2C-DSP-1.69---%28Finally%21%29-tp17041394p17052261.html Sent from the Elecraft mailing list archive at Nabble.com. _______________________________________________ Elecraft mailing list Post to: [email protected] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
