Control system employing a rotary knob
First Claim
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1. A control system connectable to a signal measurement and display instrument, comprising:
- means for generating data values representative of the angular displacement and direction of rotation of a rotary control means;
means for reading said data values at a predetermined rate to provide updated status and displacement values; and
means responsive to said status and displacement values for generating commands which establish operating conditions for said measurement and display instrument,means for reading said data wherein said means for generating data values includes a Gray code generator coupled to said rotary control means, a Gray code condition circuit coupled to said Gray code generator for producing an increment/decrement signal and a clock, and an up/down counter coupled to said Gray code condition circuit, wherein said up/down counter produces said data values in response to said increment/decrement signal and said clock.
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Abstract
A microprocessor controlled system is provided which is responsive to displacement information such as rotation rate and position of a rotary knob for controlling instrument functions such as display scrolling, the setting and display of measurement conditions (operating parameters), and the entering and display of alphanumeric data.
41 Citations
5 Claims
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1. A control system connectable to a signal measurement and display instrument, comprising:
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means for generating data values representative of the angular displacement and direction of rotation of a rotary control means; means for reading said data values at a predetermined rate to provide updated status and displacement values; and means responsive to said status and displacement values for generating commands which establish operating conditions for said measurement and display instrument, means for reading said data wherein said means for generating data values includes a Gray code generator coupled to said rotary control means, a Gray code condition circuit coupled to said Gray code generator for producing an increment/decrement signal and a clock, and an up/down counter coupled to said Gray code condition circuit, wherein said up/down counter produces said data values in response to said increment/decrement signal and said clock. - View Dependent Claims (2, 3, 4, 5)
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Specification