LinearX LT360 - Get Analog Input

60
LT360 Precision Turntable
DLL Programming Manual
■ Class Get (in)
■ Identifier lt_GetAnalogInput
■ Hex Value 0xAA
■ Call LT360LIB_CmdValue(Handle, lt_GetAnalogInput, RtnStr);
■ Returns 'OFF' or 'ON'
Description
This command returns the status for the Analog Input BNC function of the
LT360. The returned string value is either OFF or ON.
This parameter enables the Analog Input feature. When AnalogInput is set
ON, the LT360 will respond to the DC voltage at the analog input BNC
connector. When it is set OFF, it will ignore that input.
The LT360 has a scale factor of 10mV/deg for the analog input. The range
can be either unipolar (0 ... +3.600V) or bipolar (0 ... ±1.800V). The input
impedance of the analog input is 1M Ohm. Although the input is an
unbalanced BNC connector, the actually circuitry is differential. This helps
to reject ground noise.
The input source must be very stable and of low noise. The LT360 has a
resolution of 0.1 degrees and therefore responds to changes of 1mV at the
analog input. When this input is enabled, the LT360 will sample the input
and move to the location as indicated by the voltage. After that move is
completed, it then samples the analog input again and moves to the new
position. Monitoring of the analog input is real time.
If you are not using the analog input, this input must be set OFF. Other-
wise the LT360 will be controlled by any noise received at the input.
2.41 Get Analog Input