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4.6 Serial Port Software Configuration
This device incorporates two separate RS232E compatible outputs which may be
configured via software to transmit 2 different altitude data protocols simultaneously. Thus
eliminating the need for the hardware jumpers detailed in Tables V and VI. The RS485 output
will repeat the TxD1 protocol and data settings. Hardware jumpers override software settings!
Connect the digitizer to an IBM compatible computer running Hyperterminal as
described in §4.5 and as shown in the Dynamic Calibration Block Diagram. Assign the serial
port protocols as follows:
Apply power to the digitizer and after the 30 second self test time has elapsed data will appear on
the PC screen.
Type <enter>
Type ADJ
<enter> Accesses the digitizer adjustment program. The Digitizer responds A=
Type P
<enter>
The digitizer will respond with a three digit number as follows:
Serial Altitude Data Resolution
1. The first digit represents the serial altitude data resolution.
0 = Use DA-15S connector protocol hardware jumpers.
1 = 100 foot resolution on TxD1 and RS485 and TxD2 output.
2 = 10 foot resolution on TxD1 and RS485 and TxD2 output.
2. The second digit represents the protocol selection for TxD1 and the RS485 output.
0 = Use DA-15S connector protocol hardware jumpers.
1 = UPS Aviation Technologies. 1200bps.
2 = Trimble/Garmin. 9600bps.
3 = Northstar. 2400bps.
4 = Magellan, 1200bps.
5 = ARNAV, 9600bps.
The digitizer will respond with ?>(current altitude).
To identify the current serial port settings.
TxD1 Protocol
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