Re: [RTTY] DXP38 vs Soundcard stuff

[Phil Duff NA4M <na4m@arrl.net>]

At 01:21 3/13/2004, Kok Chen wrote:

> When you are comparing or use any kind of a device that has a A/D 
> converter at the input (e.g., Sound Card, DXP38, etc), it is critical that 
> the audio levels are adjusted so as to match the range of the converter.

Interesting point and something I've wondered about.

How do we determine what is the "best" input audio level to sound cards 
used for MMTTY,  PSK, and other digital modes for optimum receive performance?

Can we just rely on the software's built in input "overload" indicators if 
they have such?  Should we adjust the audio input to the point just below 
the "overload" indication?   If not where?

73 Phil NA4M

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