Content Preview
TB204 Rev1 Noise Problems with Dual Handwheels
Overview
Excessive noise can be present on the index channels in a handwheel setup since the channels are not driven The A
and B signals may cross over to the index channel as well as any noise sources causing index pulses to be detected on
the CPU card Since index channels trigger an interrupt to the DSP the DSP can eventually be crippled by unrelenting
interrupts Tying the index pulse to a fixed state eliminates excess interrupts
Procedure
1 Γ Connect the +INDEX to VCC The Green wire that was connected to the +INDEX Z is now connected to the Red
wire +5vdc
2 Γ Connect the ΓINDEX to GND The Black/Green wire that was connected to the ΓINDEX Z is now connected to the
Black/Red wire COM
Document History
Rev1 Created on 2007 04 03 by #000