Using RSP Pro 2 for CW RTTY decoding?

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RSP2user
Posts: 108
Joined: Mon Oct 09, 2017 7:11 am

Re: Using RSP Pro 2 for CW RTTY decoding?

Post by RSP2user » Fri Jan 05, 2018 2:27 am

Info for you:

1) Make sure your PC sound card sample rate is set as described here: http://w1hkj.com/FldigiHelp-3.21/html/s ... _page.html
2) Read the RTTY/FSK Configuration for FLDigi here: http://w1hkj.com/FldigiHelp-3.21/html/r ... _page.html
3) Review how the FLDigi FSK demodulator works here: http://w1hkj.com/FldigiHelp-3.21/html/rtty_page.html
4) In the FLDigi settings, the key elements to change to first attempt to get a clean RTTY characters are: 1) the Baud Rate. Note that 45.45 (or 45 if the PC won’t allow for 45.45) Baud is a common setting for RTTY at HF and HAM frequencies. Other settings used are 50 Baud, 56.25 Baud, and 75 Baud. 2) Stop bits – start with 1.5 for received RTTY. Then try 1 stop bit or 2 stop bits, if you were getting too many errors and these were not caused by radio signal fading or other issues.
5) Start with default settings for the carrier shift. However, note that the actual carrier shift is 170Hz to distinguish between a mark (2125 Hz) and a space (2295 Hz). Also, the common setting for the number of bits per character is 5 for RTTY.

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