Laser beta lasermike LS8000-3 - Manual (Page 40)

LaserSpeed 8000-3 Instruction Handbook
Interfacing with the LS8000-3
Part No. 93463 / Drawing No. 0921-01561 Page 40 of 221 Revision A (Sep 2007)
Typical Full Quadrature Pulse Train with Negative Velocity
Note: If excessive or erratic counts are noticed, the main cause is usually
improper termination of the pulse signals. It is recommended you look at the
signals (while connected to the external counter) with an oscilloscope to
determine if excessive ringing or rounding of the pulse train is present. A 100Ω
resistor can be used between true and false signals for differential
output.