[RTTY] Sound card for RTTY/MMTTY

[Joe Subich, W4TV]

 > According to NewEgg:
 >
 >      SIIG IC-510012-S2 : Signal/Noise ratio = 68.5 dB
 >      SIIG IC-710012-S2 : Signal/Noise ratio = 92.0 dB
 >
 > How relevant are those S/N ratios for for RTTY?

I'm sure Chen will weigh in on this subject but my short answer is
"not very."  Either one should provide all the performance the
average amateur will need.

In most cases the audio level from the transceiver should be set
at least 10 dB above the noise floor of the sound card and the
maximum level from the radio will be limited by the transceiver
AGC.  As long as the "quite band" noise from the transceiver can
dominate the sound card noise, the soundcard S/N is not critical.

On the other hand, for $15, I'd always choose the better spec <G>.

73,

    ... Joe, W4TV


On 1/16/2011 2:46 PM, Jim Reisert AD1C wrote:
> On Tue, Dec 28, 2010 at 1:34 PM, Joe Subich, W4TV wrote:
>
>> SIIG IC-510012-S2 ($20.00)
>>     http://www.newegg.com/Product/Product.aspx?Item=N82E16829270008
>
>> SIIG IC-710012-S2 ($35.00)
>>     http://www.newegg.com/Product/Product.aspx?Item=N82E16829270006
>
> According to NewEgg:
>
>      SIIG IC-510012-S2 : Signal/Noise ratio = 68.5 dB
>      SIIG IC-710012-S2 : Signal/Noise ratio = 92.0 dB
>
> How relevant are those S/N ratios for for RTTY?
>