Timewave DSP-232, Operating Manual

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Chapter 6 GPS Applications
Figure 6-4 illustrates the pin
assignments for connecting a GPS
receiver to the DSP-232. The same
pin assignments can be used to
connect to a Peet Bros.
ULTIMETER II® weather station.
9. When done using the DSP-
232 as a Stand Alone
Tracking Device, connect
our TNC to the computer
gain, verify that your terminal
baud rate is at 4800 baud, 8
bits, no parity, one stop bit. A
few seconds after powering
up, the DSP-232 should
display its sign-on message
and command prompt.
APRS Hardware Single Port Mode (HSP) Set-Up: Requires a registered version of APRS
APRS version 4.03 and higher includes a routine that controls the switching of the Single Port Mode between the
TNC and any GPS receiver using the handshaking lines of the COM port. HSP allows you to operate APRS on a
computer with limited COM ports, such as a laptop which usually has only one COM port, or your PC which uses
one of the two COM ports dedicated to a mouse. This is the only configuration which uses the APRS adapter cable.
You will need to have a registered copy of APRS in able to activate the GPS input. Registration information is
contained in the APRS shareware readme files. The shareware version of APRS can be obtained through many
BBSs.
Follow these steps to connect the APRS Adapter Cable to your equipment:
1. Look at the APRS adapter cable. It looks like this:
Notice the words on the outside of the rectangle; they say TNC , Computer , and GPS . This is how the Cable
should be connected.
2. Connect the APRS Adapter Cable to the serial port on the TNC using a DB-9 to DB-25 converter (not
supplied with AEA APRS Adapter Cable). The male side of the Adapter Cable, labeled TNC , should be
connected to the female end of the DB-9 to DB-25 converter. The male side of the converter should be
connected to the female serial port on the DSP-232.
3. Connect an RS-232 (not included) to a free COM port on your computer. Connect the other end of this cable
to the RS-232 port marked “Computer” on the APRS Adapter Cable. (The female side of the Adapter Cable,
labeled ‘computer’, should be connected to a cable going to the computer.)
4. The cable that comes out the side of the APRS Adapter, labeled “GPS”, connects to the NMEA-0183 port on
your GPS receiver.
The cable is now correctly connected to your equipment.
To set up the DSP-232 for HSP operation, follow these steps:
September, 05 6-5