home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
HAM Radio 3.2
/
Ham Radio Version 3.2 (Chestnut CD-ROMs)(1993).ISO
/
bbs
/
bpq402a
/
jkisscw.doc
< prev
next >
Wrap
Text File
|
1990-09-04
|
2KB
|
39 lines
I have added CWID to my JKISS and JKISSP EPROMs. The Callsign to be sent
is patched into the EPROM image with the program PATCHID, which takes two
parameters, the required callsign, and the file to patch (either JKISS
or JKISSP). Note that the specified file is overwritten, so I suggest you
make a copy of the original first.
PATCHID G8BPQ JKISS - Note call must be in upper case
The CW patttern which will be sent is displayed on the screen - please
check it, just in case my translate table is wrong!
The ID is sent after one minute, then at 29 minute intervals, with a dot
length of 60ms. If my calculations are correct, this equates to 20 WPM
The ID is send in AFSK (assuming a normal AFSK modem), but because of the
hardware design it is not possible to control which tone corresponds to
mark or space - it depends on what was sent just before the ID starts.
If you are using a modem with a scrambler (eg G3RUH), then the system
wont work - the two tones will sound the same. I'd like to know if a
CWID facility form RUH modems would be useful - if there is a significant
demand I'll see if I can find a solution. A simple on-off keying may be
possible, but would depend on the PTT characteristics of the TX. If you
have a better idea, please let me know!
The normal SLOTTIME/PERSISTENCE code is used to minimise collisions with
other stations (hence the interval of 29 mins, allowing a bit of time for
conjestion, without going over the statutory 30 mins interval).
John Wiseman, G8BPQ
4 Sept 1990