Re: [wsjt-devel] PWR slider & TUNE

[Bill S. <g4...@cl...>]

On 17/03/2019 00:51, Gary McDuffie wrote:
>> On Mar 16, 2019, at 12:25, Black Michael via wsjt-devel<wsj...@li...>  wrote:
>>
>> That should depend on what you have selected....sounds like you have Tune selected but not Transmit.
> What happened to the idea that the TX Level should always be left at maximum (top).  That was drummed into us at the same time that setting the sound card channels (in and out) at 0db and the receive level ~30 with nothing but white noise.
>
> Gary - AG0N

Hi Gary,

using digital attenuation of transmit audio is not critical for signal 
quality until high levels of attenuation. On receive there is a 
requirement to find the sweet spot between swamping quantization errors 
and maintaining maximum headroom for possible strong signals. With Tx 
there is vastly more scope for setting level. Neither are hyper-critical 
but more attention is warranted for Rx level setting, mainly due to the 
unknown factor of potential clipping from strong signals.

73
Bill
G4WJS.