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Receiver commands allow you to change or query the status of various operating parameters such as elevation mask, antenna altitude, position mode, etc. In this context, set commands are used to change the device operating parameters. Query commands prompt the device to output status messages for parameter settings and receiver operation.

If an invalid set or query command is issued, a "not acknowledged" (NAK) response is output:
 

$PASHR,NAK*30

Set command messages can be sent through serial port. When the DG16 receives a valid set command message, it returns an "acknowledged" (ACK) message:
$PASHR,ACK*3D

To clear the stored almanac, emphemeris data, reset the receiver memory, set the serial port baud rate to the specified rates, and/or send the modem initialization string through the specified port send the $PASHS,INI command. The format of the command is $PASHS,INI,d1,d2,d3,d4,d5,c6 where d1-d4 are the default baud rate codes for ports A-D, d5 is the reset memory code and takes a value of 0-3 with the following codes:

0 = No memory reset
1 = Reset internal memory/battery back-up memory
2 = Reset/reformat memory card
3 = Reset internal memory and memory card

For example, sending $PASHS,INI,5,5,5,5,3,0 will do a full receiver reset. Codes 0 and 2 behave like a power cycle. Codes 1 and 3 reset all parameters to default as well as the ephemeris and almanac. Code 2 and 3 reformat the memory card by clearing the FAT table and directory structure. The parameter c6 sets the modem initialization and takes values A-D or 0 = no initialization.

System Initialization - Baud Rate

The $PASHQ,PRT quarries the baud rate of the current port. The return is $PASHR,PRT,c1,d2*cc where c1 is the port (A,B,C,D), d2 is the port code listed below and *cc is the checksum.

0 = 300
1 = 600
2 = 1200
3 = 2400
4 = 4800
5 = 9600
6 = 19200
7 = 38400
8 = 56800
9 = 115200

• $PASHS,INI,2
  • $PASHR,ACK*3D