[UK-CONTEST] Data contest - apologies

[David]

Stuart 

Why do you think that is so for data modes? The distortion of even a cheap
£2 USB sound adaptor will be better in terms of distortion, IMD and SNR than
the audio and RF circuits of a SSB transmitter plus the same in the
receiver.

A software defined radio (SDR) is a different thing all together. It is
exposed to a very wide bandwidth and needs to perform with very large
unwanted signals while listening to very weak signals. A data mode demand
from/to a transceiver requires a very small dynamic range and narrowband
signals. Totally different set of circumstances.

73 David G3YYD



-----Original Message-----
From: uk-contest-bounces at contesting.com
[mailto:uk-contest-bounces at contesting.com] On Behalf Of M0RXX
Sent: 07 March 2012 13:13
To: Peter Lock
Cc: uk-contest at contesting.com; <g4fnl at bubloz.demon.co.uk>
Subject: Re: [UK-CONTEST] Data contest - apologies

Hi Peter
Laptop sound cards are not good enough in most cases for data work. I saw a
report on a dell and it was very bad these were for SDR units but the same
principle.

Stuart Southern. 

Radio Amateur. M0RXX
First Aid Saves Lives.