an unproto packet with the path GPS via C-3, FLOOD4-4. Either KAM Plus will
then display the resulting action as follows:
A>GPS,C-3,FLOOD4-4/H: <UI>:234
A>GPS,C-3*,FLOOD4-4/V: <UI>:234
A>GPS,D*,FLOOD4-3/V: <UI>:234
A>GPS,C*,FLOOD4-2/V: <UI>:234
A>GPS,B*,FLOOD4-3/V: <UI>:234
Station C hears the HF unproto packet of station A and digipeats it via its GATE-
WAY out its VHF port. Digis B and D hear the VHF UI packet and store it for
digipeating, and D transmits first. In turn station C hears station D’s repeat of the
frame and digipeats the frame, decrementing flood to “FLOOD4-2.” It didn’t
digipeat its own “FLOOD4-4" frame because it can’t hear itself! Station B fin-
ishes last due to the slot/persist algorithm. D digipeats the frame only once even
though it hears both B’s and C’s transmissions since they are within 30 seconds
of it’s own transmission.
New In the KAM’98
Compared to previous Kantronics’ TNCs, the KAM’98 improves GPS function-
ality in several ways.
Using a Second Serial Port
A second read-only serial port, configured in firmware, is supported at pin 3 of
the AUX port of the KAM’98. This second read-only port accepts NMEA strings
from most GPS portables and frees up the KAM’98 RS-232 standard serial port
for connection to a laptop. This configuration eliminates the need for a special
cable, such as the Kantronics HSP, to accommodate the sharing of the RS-232 se-
rial port between a GPS device and a computer.
With this second port, the KAM’98 can be configured as part of a GPS tracker -
GPS device, TNC, and transceiver - and at the same time accommodate automati-
cally the attachment of a computer for sending/receiving packet data. For exam-
ple, the KAM’98 with GPS device attached to the second serial port will allow a
program such as APRS to take control of transmitting fix locations via UI frames.
This may be handy when a driver wishes to add his computer to a tracker already
operating in his vehicle.
GPS NMEA Interfacing Capability
Packet Modes of Operation
KAM’98 v 8.3
195
User’s Guide
Summary of Contents for KAM 98
Page 4: ...User s Guide ii KAM 98 v 8 3...
Page 18: ......
Page 132: ...Getting Started Other Topics User s Guide 114 KAM 98 v 8 3...
Page 160: ...blank page Non Packet Modes of Communication RTTY Operation User s Guide 142 KAM 98 v 8 3...
Page 342: ...blank page Command Reference KAM 98 Commands User s Guide 324 KAM 98 v 8 3...
