ADLINK Technology MCM-100, Руководство пользователя

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Operation 47
MCM-100/102
4.3.3 Pulse Output
The GPI/O can also simulate a pulse output. By setting a varying
amount of Pulse_initial_cnt and Pulse_length_cnt, varying pulse
frequencies and duty cycles can be obtained. The maximum out-
put frequency is 4MHz, as shown.
Calculation of the pulse frequency and duty cycle is as follows.
4.3.4 Digital Trigger IN for Continuous Analog Input
The GPI/O can be programmed as the digital trigger source for
continuous analog input acquisition. See “External Digital Trigger-
ing” on page 42. for details.
4.3.5 Synchronization Sample Clock IN
To synch multiple devices, the GPI/O can be programmed as
external sample clock input, with the same trigger signal and
external sample clock applicable to multiple MCM-100/102s to
achieve more than 4 channel synchronization without phase delay.
Note the synchronization sample clock must be continuous, with
valid frequency range from 1 kHz to 128 kHz.
Pulse_initial_count=7 Pulse_length_count=8
Timebase
PWM OUT
cnt length Pulse cnt initial Pulse
cnt length Pulse
Duty
cnt length Pulse cnt initial Pulse
F
F
PWM
Timebase
PWM
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