----- Original Message ----- From: "Christos Nikolaou" <[EMAIL PROTECTED]> To: <[email protected]> Sent: Friday, May 23, 2008 5:50 PM Subject: [softrock40] Multiband SoftRock with Si570 and PowerSDR-SR40
>I managed to have a modified multiband SoftRock RxTX 6.2 with the > Si570 (LVDS) board from WB6DHW and a small addition of a FIN1002. > I also setup the PowerSDR-SR40 thats got Si570 control over the LPT > interface. > So far so good, Si570 responds to PowerSDR and I have Rx and Tx (no > transmit images since it works like a SDR-1000) from 160 up to 10m (no > change whatsoever to 6m). > Well, that happens though with an erratic behaviour, sometimes it does > change band, sometimes it does not change, instead it goes to its > default startup frequency. After a few tries, it manages to change > band. Not sure but it seems that either PowerSDR-SR40 has a weird bug > on Si570 programing or I'm not doing something right. > > Has anyone else notified this? > > 73 > Christos SV1EIA > > > P.S. > I setup the Si570 Xtal to be 114285000Hz. Christos, Some have reported the same behaviour. It seems there is a timeing issue in I2C routine on fast computers. As temporary workaround it seems that it can be resolved by addings some Cs over the SDA and SCL lines to artifically slow down the timing. I am planning to do this weekend a test with Jan G0BBL to resolve this issue in the software, after which I will release a new PowerSDR-sr40 and si570.exe (standalone control prog.) and si570.dll (Winrad driver). Thanks for your interest. 73, Guido PE1NNZ
