Re: [digitalradio] Re: RTTY Configurations
Thanks Vojtech, I'm getting a grip on this now, maybe an internal beta of my DM780 software with PSK / RTTY / Olivia by the end of May. It's working on receive now but needs refining. Simon Brown, HB9DRV - Original Message - From: Vojtech Bubnik [EMAIL PROTECTED] I only allowed the HAM subtype of RTTY in PocketDigi mostly because of my time lack to port everything. The other reason is to keep the UI simple, which is probably the reason of your question. I asked the same question about used submodes as you couple of months ago here at this list.
[digitalradio] Re: RTTY Configurations
Hi Simon. I only allowed the HAM subtype of RTTY in PocketDigi mostly because of my time lack to port everything. The other reason is to keep the UI simple, which is probably the reason of your question. I asked the same question about used submodes as you couple of months ago here at this list. The only requests I got are from the yachters for allowing reception of DWD (Deutche Wetterdienst) broadcasts. http://www.dwd.de/de/wir/Geschaeftsfelder/Seeschifffahrt/Sendeplaene/broadcast_rtty_1prog.pdf http://www.dwd.de/de/wir/Geschaeftsfelder/Seeschifffahrt/Sendeplaene/broadcast_rtty_2prog.pdf The others are perfectly content with the just one submode. Hope it helps. 73, Vojtech OK1IAK
[digitalradio] Re: RTTY Configurations
--- In digitalradio@yahoogroups.com, Simon Brown [EMAIL PROTECTED] wrote: What are the common RTTY configurations? I ask because I am in the middle of porting / rewriting the fldigi RTTY code but have never used RTTY myself. I'm thinking about combinations of baud / shift / bits / whatever. Simon Brown, HB9DRV Well of course 170 Hz shift and 45.45 baud is the most common and about the only thing you'll ever hear on the ham bands. And there is hardly enough RTTY outside the ham bands to bother with anymore. There is some 75 baud weather type traffic I guess, and they may use 850 or 425 shift. Then a military standard is/was 85 Hz shift, and I've been wanting to try this on the ham bands but haven't found anybody to sked with so far. There was a net for military radio collectors that was using 850 Hz and 45.45 baud. 50 baud used to be popular in Europe (standard speed for Telex machines) but I get the impression that has died out for ham use. Then there is the PK-232 that uses 200 Hz shift because it has only one narrow shift and that is their compromise between 170 Hz for RTTY and 200 for Pactor/Amtor. So you might want to make a shift of 185 or so to allow copy of both sides of a QSO where one is using 170 Hz and the other is using 200. And 200 so optimum performance when talking to a PK-232. There's also Minimum Shift Keying where the shift is equal to the baud rate (or is it half the baud rate) but I've never encountered it on the air.
Re: [digitalradio] Re: RTTY Configurations
jhaynesatalumni wrote: --- In digitalradio@yahoogroups.com, Simon Brown [EMAIL PROTECTED] wrote: What are the common RTTY configurations? I ask because I am in the middle of porting / rewriting the fldigi RTTY code but have never used RTTY myself. I'm thinking about combinations of baud / shift / bits / whatever. Simon Brown, HB9DRV Well of course 170 Hz shift and 45.45 baud is the most common and about the only thing you'll ever hear on the ham bands. And there is hardly enough RTTY outside the ham bands to bother with anymore. There is some 75 baud weather type traffic I guess, and they may use 850 or 425 shift. Then a military standard is/was 85 Hz shift, and I've been wanting to try this on the ham bands but haven't found anybody to sked with so far. There was a net for military radio collectors that was using 850 Hz and 45.45 baud. 50 baud used to be popular in Europe (standard speed for Telex machines) but I get the impression that has died out for ham use. Then there is the PK-232 that uses 200 Hz shift because it has only one narrow shift and that is their compromise between 170 Hz for RTTY and 200 for Pactor/Amtor. So you might want to make a shift of 185 or so to allow copy of both sides of a QSO where one is using 170 Hz and the other is using 200. And 200 so optimum performance when talking to a PK-232. There's also Minimum Shift Keying where the shift is equal to the baud rate (or is it half the baud rate) but I've never encountered it on the air. Does anyone run 100wpm ASCII RTY anymore?
