9 Packet-Radio
121
on shortwave, one port can be configured as 1200 baud access point and the fourth one as
9600 baud access point.
To switch into the SRP mode, first the KISS mode has to be enabled. KISS master and
KISS modems automatically negotiate if SRP can be enabled. All modems in a SRP-ring
must be capable of SRP!
A complete description of the SRP protocol exceeds the limits of this update information
and can be found in relevant literature or in the Internet.
9.8
Commands
9.8.1
Aprs
Default setting: 0
Parameter: 0 Off, APRS-beacon disabled
1 On, APRS-beacon transmits GPS-position data
if available
2 FIX, APRS-beacon transmits fixed position
data (adjustable with
Aprs Position
).
In GPS mode the beacon only sends if the position data is not older than 20 minutes. If
the GPS receiver fails, the beacon terminates the transmission after 20 minutes.
The APRS beacon uses as sender call-sign the
MYcall
of the virtual channel 0. As
long as this call-sign is not set the APRS-beacon cannot be activated. The
MYcall
of
the virtual channel 0 is automatically set to the Pactor
MYcall
(after a
RESTart
), so
that normally only a single
MYcall
entry is necessary to set all PACTOR as well as
Packet-Radio/APRS
MYcall
to your own call-sign..
Additional to the normal nummeric parametes, the
APRS
command provides several sub
commands:
COmment
,
PAth
,
POsition
,
SHort
,
SYmbol
,
TImer
Also refer to chapter
on page
9.8.1.1
APRS COmment
Default setting: none
Parameter: -
or at maximum 40 characters
Sets the comment text that is added to every APRS-datagram. E.g. a short description of
the system can be entered: “PTC-IIIusb 20 W, Dipole”. The comments maximum length
is 40 characters. Longer comments will be rejected with an error message. A minus
character (-) as first Comment character sets the Comment to “NONE”, and with this
deletes the comment.
