DAVIS WeatherLink for Windows 4.0 - Manual (Page 21)

S O F T W A R E I N S T A L L A T I O N A N D S E T U P
Finding the Correct Serial Port
12
F I N D I N G T H E C O R R E C T S E R I A L P O R T
The software contains a procedure for locating the serial port to which your sta-
tion is connected or determining whether that serial port is working. Using the
Loopback command (as opposed to Test) will help you determine whether a com-
munication problem is being caused by the serial port or by the WeatherLink.
Note: This procedure will only work for direct connections. If you are making a phone modem con-
nection, you may want to simply check the communications software you normally use for the
correct serial port setting. Otherwise, you must consult the documentation supplied with your
modem.
In order to use this procedure, you will need the loopback connector (the short
cable with a phone jack on one end and a red plastic tip on the other) supplied
with your Weatherlink software package.
1. If necessary, disconnect the 40-foot WeatherLink cable from the DB9 or DB25 adapter
which is connected to the COM port.
2. Insert the loopback connector into the DB9 or DB25 adapter.
3. Choose Serial Port from the Setup menu.
The software opens the Serial Port dialog box.
S ERIAL P ORT
4. Choose Loopback.
The software will search all standard serial ports and inform you of the COM
port at which the loopback connector is located.
L OOPBACK C ONNECTOR F OUND
The software automatically selects the correct COM port for you in the Serial Port
dialog box. If it cannot find the loopback connector at any COM port, your serial
port is not working. Consult your computer documentation for help.