The User Guide for WSJT-X says It is usually best to turn AGC off or reduce the RF gain control to minimize AGC action, but the Icom IC-705 seems not to have an option to turn AGC off, only to set it to fast, medium and slow. Should it be set to slow?
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Actually you can get AGC off on the 705. The process is a bit roundabout, but it's the same as the other Icom touchscreen radios.
- Set the mode you're interested in (i.e. USB-D for FT8) because AGC settings are remembered per mode.
- Open the FUNCTION quick menu.
- Press and hold AGC for one second to open the AGC settings menu.
- Press whichever one of the AGC settings you want to be replaced by OFF.
- Turn the main dial all the way left — the setting below the lowest AGC time constant should be OFF.
- Press EXIT.
- Now you can select AGC OFF at any time.
FT8 isn't really that sensitive to AGC, though; you'll do very little harm by just leaving the AGC at MED.
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$\begingroup$ Thank you so much. I completely missed that, and I played with it and read the manual. I was expecting off to be at the other end of the spectrum. Do you want double the karma? ham.stackexchange.com/questions/22017/… $\endgroup$ Jul 10 at 7:51