On 08/07/2017 18:28, Dave 'Doc' Corio wrote:
I using an Icom IC-7200 which has the built-in sound card that feeds to the computer via a USB cable. AF Gain on the rig has no effect on this audio level. The Windows sound card level does indeed work, but setting this at 0dB leaves me with a WSJTX indicated level of between 60 to 70.
Hi Dave,Icom have never provided line level output controls on their rigs, fortunately the level is a reasonably generous one. For rigs that have analogue output you can always build a passive pad to attenuate it a little if needed. Many interface units for analogue audio connections like the SignaLink USB provide input and output analogue level controls.
For USB digital audio outputs they have stuck with this fixed level, the RF gain control is one obvious option if there are particularly strong signals in the receiver passband. I would not worry about the background noise level reaching 40db to 50dB on the WSJT-X level indicator, as has been repeated many times, it is usually not that critical.
73 Bill G4WJS.
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