General Information 11
General Information
Some radio transmitters and receivers, such as FM radios, can interfere with the
operation of GPS receivers. Magellan recommends that you verify that nearby
hand-held or mobile communications devices do not interfere with your GPS
receivers before setting up your project.
The G12 has a number of available options. The options that are set in the
receiver will determine which commands and features you can use. For example,
if the photogrammetry option is not installed, you will not be able to use the
$PASHS,TTT command to output event time tags from the serial port.
The command $PASHQ,RIO queries for the receiver’s configuration. The
response message includes version numbers for the processor and channel
firmware, a list of installed options, and the receiver’s serial identification number.
The response is output in the format shown below:
$PASHR,RIO,f1,f2,f3,f4,f5*cc
CAUTION
The G12 may be damaged if the SMA center pin is not isolated from
DC ground. Provide a DC block between the center pin and ground.
The block should have the following characteristics:
• VSWR 1.15 maximum at 1575 MHz
• Insertion loss 0.2 dB maximum
• Maximum voltage 5 VDC
Table 1.4. $PASHR,RIO Message Format
Field Description
f1 Receiver name (maximum 10 characters)
f2 Main processor firmware version (maximum 10 characters)
f3 Channel Firmware version (maximum 10 characters). If not applicable,
this field is empty
f4 Option setting (maximum 42 characters). ASCII characters represent
installed options. For option definitions, see Table 1.5
G12RevD.book Page 11 Tuesday, April 2, 2002 4:33 PM
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