Hi Tommi In testing here in VK - VK2JN and VK2DSG have passed files in excess of 4 Mb on 80m band - best time seems to be late afternoon when atmospheric noise is a lesser problem Both stations here using licenced versions of RFSM8000 VER .534
To achieve these speeds around the 3000 bps you do require quite good S/NR figures - but who is going to try and pass a 4mb file if S/NR is -5 - just forget about it until you have good conditions Sound card calibration is another thing that requires some attention using this program to get the best transfer speeds Here in VK we both used CheckSR.exe from MixW - and Calibrate.exe from RFSM8000 - later withdrawn by author But we used to calibrate with both programs and then made an average reading of both results and used this in the tx/rx soundcard setup In my opinion - a good program for use on HF - given fair to good conditions and maybe a lot better on VHF Regards Les VK2DSG From: Tommi Holopainen Sent: Monday, October 13, 2008 6:04 AM To: digitalradio@yahoogroups.com Subject: [digitalradio] RFSM file transfer Hello Just wondering has anybody else tryed transfer quite big files on HF with RFSM or some other mode?. We just tranfered OH7TE ---> OH7JJT "Big" 1.3 MB file 80m band. File was simply zipped program file. Propagation on 80m band was not very good, some qrm, aurora and fading as usually here dark time. We had abt 400 km QRB. Transfer time was about 1 hour Stations setup: OH7JJT: Yaesu FT 990 40 w Dipole abt 8 m up Software RFSM 8000 version 0.534 OH7TE JUMA TRX2A Digi Mode Edition + Lauta Mosfet PA abt 60 w Dipole up 12m Software RFSM 8000 version 0.534 -Tommi OH7JJT-
