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SUMMARY OF PULSE PROCESSOR SETTINGS
Invert: Inverts the signal at the output of the pulse processor.
Falling: Selects 'Falling Edge' mode for the pulse processor. This mode is only relevant if the
'Width' is also specified. When the 'Falling' token is present together with 'Width,' the pulse
processor will generate a negative pulse, triggered from the negative edge of the input signal.
Width (Pulse Width): When a 'Width' token is present, a defined-length pulse is generated, which
starts after the specified 'Delay' and after the active edge of the 'input' signal. The length of the
pulse is specified in microseconds (as a floating point number) and internally converted to pixel
clock units. The maximum pulse width is at least 10 seconds. However, if the period of the 'input'
signal is lower than the selected width, the latter is dynamically clamped to the signal period.
The minimum pulse width is one pixel clock.
Delay: Delays the output pulse by the specified time in ms, µs or camera clock multiples.
If the 'Width' token is not present, both edges of the signal are delayed by the same amount. If
present, the delay is measured from the rising edge of the input
signal unless the 'Falling' token
*
is present, in which case the delay is measured from the falling edge of the input. The delay time
is specified in microseconds and is internally converted to pixel clock units.
Filter (Filter Time): When a 'Filter' token is present, the 'input' of the pulse processor is filtered
through an edge filter of the specified time. The time of the filter can be between 0 and 1 second.
In order for the output of the filter to be asserted, the 'input' signal must be continuously de-
asserted for the same duration. The edges of the 'input' are thus delayed by the specified filter
time (for a 'clean' input pulse). Filtering is applied before and independently of the delay and
duration. The filter time is specified in microseconds and is internally routed to pixel clock units.
Pixel Clock: The period of the pixel clock is the basic time interval for all camera timing.
Please note that pulse processors can sometimes generate pulses too short for the output
drivers to switch and the processed signal should be verified with an oscilloscope before use.
PROGRAMMABLE SIGNALS & DESCRIPTIONS
The settings as described are the signal's default state prior to processing.
Ready: An isolated open collector output with 1k pull-up signal (active high). 'Ready' is asserted
when the camera goes into 'Capture' mode and is de-asserted either when the Cine is triggered
or when recording is completed. 'Ready' changes synchronously with frame capture (at the end of
each exposure), so in 'External Sync' mode it will not change until F-Sync pulses are received.
Chapter 5: Signal s & Programmable I/O | 23
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