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4 Agilent E1538A Enhanced Frequency/Totalize/PWM SCP
Introduction
The Agilent E1538A provides eight TTL compatible channels of digital I/O.
Channels can be individually configured to perform any one of the following
functions:
• Input:
-- Static digital state
-- Frequency measurement
-- Period meaurement
-- Totalize positive or negative signal transitions
-- Pulse width measurement
-- Rotational velocity (senses added or missing cogwheel teeth)
-- Quadrature position. (requires 2 channels)
• Output (configurable as Open Drain or passive pull-up):
-- Static digital state
-- Single pulse-per-trigger: Generates a pulse at each algorithm
execution. The pulse width is controlled by the algorithm.
-- Pulse Width Modulation: A free-running pulse train where a SCPI
command pre-configures the frequency and the algorithm controls
the pulse width.
-- Frequency Modulation: A free-running pulse train where a SCPI
command pre-configures the pulse width and the algorithm controls
the frequency. In this FM mode the duty cycle varies with
frequency.
-- Frequency Modulation: A free-running pulse train where the duty
cycle remains constant at 50% while the algorithm controls the
frequency.
-- Rotationally positioned pulse: The algorithm controls the angular
pulse position (relative to an input sensing rotational velocity). The
pulse width is fixed by a SCPI command. (requires a reference
channel in addition to any rotational pulse output channels)
-- Rotationally positioned pulse: The algorithm controls the width of
the pulse. The angular pulse position (relative to an input sensing
rotational velocity) is fixed by a SCPI command.(requires a
reference channel)
-- Stepper Motor Control: Controls 2-phase and 4-phase motors in