Hi Guys,
Thank You for your recent comments regarding 75 Baud RTTY. I think I'm
ready to "go at it" this weekend.
I am trying to check out the performance of my computers sound card
running RTTY with MMTTY and using a K3 for the receiver and Spectran audio
analyzer software. Here are the numbers I'm getting:
1) Cable to sound card input disconnected, noise floor averages -100dB.
2) Cable connected from K3 rcvr to sound card input but no signal, noise
floor averages -70dB.
3) Same as #2 above but with an S-9 signal, signal averages -44dB or 26dB
above the no signal noise floor.
QUESTIONS:
a) Is 26dB a reasonable S/N ratio for a built-in mother board sound card?
b) How much could I likely improve the S/N ratio with a better quality
sound card?
Thanks & 73,
Dick- K9OM
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