$JMASK,e<CR><LF>
Where the elevation mask cutoff angle, ‘e’, may be a value from 0 to 60
degrees.
The receiver will reply with the following response.
$>
4.6 $JNP
This command allows the user to specify the number of decimal places
output in the GGA and GLL messages.
This command has the following definition.
$JNP,x<CR><LF>
Where 'x' specifies the number of decimal places from 1 to 5. This command
will affect both the GGA and the GLL messages.
4.7 $J4STRING
This command allows the GPGGA, GPVTG, GPGSA, and GPZDA messages
to all be output with the issue of a single command. The output rate of each
message is limited to 1 Hz, however, you may choose to set the baud rate of
the current or other port at the same time.
This command has the following definition.
$J4STRING[,r][,OTHER] <CR><LF>
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