LT360 Precision Turntable
User Manual
LT360 Precision Turntable
User Manual
25
3.5 Analog Input
The Analog Input feature allows for direct positional control of the LT360 via
a DC analog signal. The connector is a BNC, and the internal circuitry is
differential to improve ground noise rejection.
The Analog Input can be enabled/disabled through software. When
enabled, the LT360 will respond to the DC voltage at the analog input BNC
connector. When disabled, 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 disabled. Otherwise
the LT360 will be controlled by any noise received at the input.
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