Each cycle can be decoded into 1 or 4 states, referred to as X1 or X4 resolution multiplication. One Electrical Degree (°e): 1/360th of one cycle. One Shaft Rotation: 360 mechanical degrees.
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Index (I): The index output goes high once per revolution, coincident with the low states of channels A and B, nominally 1/4 of one cycle (90 °e). Values are for the worst error over full rotation.ĬPI: The number of Cycles (C) of the A or B output Per Inch of linear strip movement.ĬPR: The number of Cycles (C) of the A or B outputs Per Revolution.Specifications apply over the entire operating temperature/voltage range.Encoder disks, quadrature decoder chips, counter chips, computer interface boards, mating connectors, and cables are also available.ĭownload the EM2/EM1 comparison chart.
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Dolby pulse encoder driver#
An internal 0.1 ♟ decoupling capacitor is designed into the EM2 to provide enhanced noise immunity.įor open collector and higher voltage applications, add the PC3 cable driver, or for differential cable driver outputs, add the PC4 cable driver. The EM2 operates with a single 5V supply and provides single-ended outputs capable of sinking and sourcing 5mA. Each EM2 module is resolution-specific and is matched to the resolution of an encoder disk. The EM2 provides digital A & B quadrature outputs with a third output index channel. The EM2 uses phased array detector technology to provide superior performance and greater tolerances over traditional aperture mask-type encoders. The EM2 consists of a lensed LED source and a monolithic detector IC enclosed in a small polymer package identical to the EM1. This module is designed to detect rotary position when used with a US Digital encoder disk.
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The EM2 is a transmissive optical encoder module designed to offer 2x or 4x higher resolution than the EM1 encoder module.