
FASTRAK MANUAL
Rev. G
64
JUNE 2012
‘Q’ – Angular Operational Envelope
Syntax:
Qs,[az
max
],[el
max
],[rl
max
],[az
min
],[el
min
],[rl
min
]<>
or
Qs<> to read back the current orientation limits
Purpose:
This command allows the user to set maximum and minimum limits for the
azimuth, elevation, and roll outputs. If the orientation outputs are outside of the
limits defined by this command, the system will output an error ‘y’.
The specific parameters are:
s
the number of the station whose angular limits are to be
established.
az
max
the maximum azimuth value for the angular operational
envelope.
el
max
the maximum elevation value for the angular operational
envelope.
rl
max
the maximum roll value for the angular operational envelope.
az
min
the minimum azimuth value for the angular operational envelope.
el
min
the minimum elevation value for the angular operational
envelope.
rl
min
the minimum roll value for the angular operational envelope.
Relatives:
V
Default:
180, 90, 180, -180, -90, -180
Example:
If the FASTRAK system outputs were to be used to drive a gimbaled system that
had physical orientation limits, then it would be a good idea to set the FASTRAK
angular operational envelope to those limits. Suppose the gimbaled system had
azimuth and elevation limits of +/-45 degrees. The following command should be
sent:
Q1,45,45,180,-45,-45,-180<>
The FASTRAK data will now contain an error ‘y’ each time the azimuth or
elevation limit is exceeded. In addition, the application software should be
programmed to ignore any data record containing the ‘y’ error to avoid causing
the gimbaled system to slam into a limit.
RECORD IDENTIFIER ........ Q
INITIATING COMMAND ....... Q