Rick wrote: > If the S/N ratios are measuring above the noise, the numbers indicate a > very good link. As I have found out the hard way, when we tested SCAMP, > it was not easy to even maintain 10 dB above noise. I am not clear on > the amount of data you are sending as it appeared to be used more as a > chat mode? Or did you send large files too?
I DONT THINK YOU LOOKED AT THE FILE SIZES AND THE TRANSFER TIMES OF THE FILES LISTED BELOW ---- READ ALL OF BELOW THROUGH FOR FILE SIZES AND TIMES TAKEN (Copied from previous email) Connecting to 'TEST4'... - 29/09/2007 - 11:19:09 AM RFSM-8000, version 0.508, user license: BETA-TESTER - 29/09/2007 - 11:19:09 AM Maximum supported connection speed - 8000 bit/sec - 29/09/2007 - 11:19:09 AM Connected to 'TEST4' - 29/09/2007 - 11:19:17 AM 'TEST4' accept FTP-requests. - 29/09/2007 - 11:19:17 AM 'TEST4' accept MAIL-requests. - 29/09/2007 - 11:19:17 AM Receiving file 'ATT00017.jpg', size 28623 bytes, from 'TEST4'... - 29/09/2007 - 11:20:10 AM File 'ATT00017.jpg' received succesfully, all time 173 sec, average speed 1322 bits/sec - 29/09/2007 - 11:23:20 AM Receiving file 'ATT00023.jpg', size 39781 bytes, from 'TEST4'... - 29/09/2007 - 11:24:18 AM File 'ATT00023.jpg' received succesfully, all time 259 sec, average speed 1225 bits/sec - 29/09/2007 - 11:28:55 AM Receiving file 'ATT00011.jpg', size 16126 bytes, from 'TEST4'... - 29/09/2007 - 11:29:40 AM File 'ATT00011.jpg' received succesfully, all time 45 sec, average speed 2846 bits/sec - 29/09/2007 - 11:30:42 AM Receiving file 'ATT00020.jpg', size 35064 bytes, from 'TEST4'... - 29/09/2007 - 11:31:37 AM File 'ATT00020.jpg' received succesfully, all time 257 sec, average speed 1090 bits/sec - 29/09/2007 - 11:36:11 AM 'TEST4' request to read download directory 'C:\RFSM8000\TRANSMIT'... - 29/09/2007 - 11:36:19 AM Request for sending file 'filelist' to 'TEST4'... - 29/09/2007 - 11:36:19 AM Sending file 'filelist', size 643 bytes, to 'TEST4'... - 29/09/2007 - 11:36:29 AM File 'filelist' sended succesfully, all time 14 sec, average speed 350 bits/sec - 29/09/2007 - 11:36:44 AM 'TEST4' request to get file 'C:\RFSM8000\TRANSMIT\#70726153230- de VK2KDK-birds and bee.jpg'... - 29/09/2007 - 11:37:47 AM Request for sending file '#70726153230- de VK2KDK-birds and bee.jpg' to 'TEST4'... - 29/09/2007 - 11:37:48 AM Sending file '#70726153230- de VK2KDK-birds and bee.jpg', size 67971 bytes, to 'TEST4'... - 29/09/2007 - 11:38:09 AM File '#70726153230- de VK2KDK-birds and bee.jpg' sended succesfully, all time 405 sec, average speed 1342 bits/sec - 29/09/2007 - 11:44:54 AM Receiving file 'ATT00017.jpg', size 28623 bytes, from 'TEST4'... - 29/09/2007 - 11:45:36 AM File 'ATT00017.jpg' received succesfully, all time 90 sec, average speed 2531 bits/sec - 29/09/2007 - 11:47:24 AM Receiving file 'ATT00035.jpg', size 32482 bytes, from 'TEST4'... - 29/09/2007 - 11:48:12 AM File 'ATT00035.jpg' received succesfully, all time 117 sec, average speed 2214 bits/sec - 29/09/2007 - 11:50:26 AM Receiving file 'Hi-Q Hat + Hot Rodz addition.JPG', size 1089463 bytes, from 'TEST4'... - 29/09/2007 - 11:51:39 AM If you look at the transfer times you can see they go up and down in relation to band conditions > > Did the path drop out rather suddenly? The S/N levels seemed to be > holding up quite well. If you had switched to Olivia, MFSK16, etc., do > you think you could have continued communicating? Yes the path did drop out completely - and we maybe would have been able to continue with Olivia - but of course it would only have been good enough to chat - and maybe small service messages > > The 8PSK ALE modes are the same or very similar waveforms to what is > used in RFSM2400 and the advantage of PC-ALE is that it now supports CAT > PTT switching which is something I expect in a modern digital program. Read capabilities of RFSM8000 below > > When I use the term ALE, I am mostly referring to the various modulation > schemes as one thing. I personally have minimal interest in the Link > Establishment part of ALE as I don't see this as being used much except > for some longer distance alerting on HF for sudden emergencies. What I > do see more useful is that the modulation schemes are available as a > more open standard and can compete with Pactor modes. The Freeware version of RFSDM2400 working at max speed of 3200 bits per second is available to all > > The fastest modes in RFSM are not as fast as the fastest modes in "ALE" > since they can go about double that speed but do require ISB I think and > that will not be used on HF amateur radio bands. The fastest speed avail to registered users - using the non standard mode (.3 TO 2.7 KHZ will be 6666 bits per second and for those that can use the .3 to 3.3 khz version will be 8000 bits per second Again, maybe we need to > change the terminology to the appropriate MIL-STD or STANAG such as we > do with Multipsk calling the slow speed 8FSK125 waveform 141A? > > 73, > > Rick, KV9U > COPIED FROM THE SITE http://rfsm2400.radioscanner.ru/ > 1. Capabilities of «RFSM-8000» (and will be more...) > > - backward compatibility with «RFSM-2400»; > - More speed – up to 8000 bps (for registered users ONLY); > - No limits on size of transfered files (for registered users ONLY); > - Transmitter control over CI-V interface; > - Broadcast chat (without connection) (for registered users ONLY); > - Logarithmic spectroscop view; > - "Waterfall" (colored/grayed) view (for registered users ONLY). > > And all features from «RFSM-2400» (available without registration): > - user chat (keyboard to keyboard); > - download a file from the remote users DOWNLOAD directory; > - upload a file to the remote users UPLOAD directory; > - read and display the remote users DOWNLOAD directory; > - change to a sub-directory in the remote users DOWNLOAD directory; > - operates as mail-server/mail-client, i.e. read mail-box, get mail, send > mail, > - delete mail; > - operation as a timed "beacon"; > - operate as a simple local HTTP proxy (for access to the Internet). Regards Les Announce your digital presence via our Interactive Sked Page at http://www.obriensweb.com/drsked/drsked.php Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/digitalradio/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/digitalradio/join (Yahoo! ID required) <*> To change settings via email: mailto:[EMAIL PROTECTED] mailto:[EMAIL PROTECTED] <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
