LF: RX and Sound Card

["James Moritz" <james.moritz@btopenworld.com>]

Dear LF Group,

I have just uploaded "RX_Soundcard_cal_v1.pdf" to the files page at the 
UK500kHz group web site (go to 
http://groups.google.com/group/uk500khz/files - it is down at the bottom of 
the list). This describes a way of calibrating receiver frequency and sound 
card sampling rate using an off-air standard frequency such as MSF or 198kHz 
R4, without requiring an accurate audio frequency to calibrate the sound 
card. This is addressed primarily to WOLF mode transmission and reception, 
where this calibration has to be done fairly accurately in order for the 
mode to work properly, but could also be generally useful where sound card 
sample rate calibration has to be done, and there is no precision audio 
frequency source available in the shack.
Any comments would be welcome,

Cheers, Jim Moritz
73 de M0BMU