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RATC
Class
Description
Command syntax
Query syntax
Query response
Example
882 Video Test Instrument User Guide (Rev A.35)
pixel RATe Calibration factor
System parameter settings
Sets an internal multiplication factor used in setting the pixel clock frequency. The
multiplication factor can be set to compensate for the frequency error of the internal
reference crystal. Having to use a factor outside of the typical range may indicate a failure
of generator's hardware. Reinitializing the generator's memory sets the calibration factor
to a factory-default setting of 1.00000.
Note: The RATC parameter is a system level parameter that will affect the pixel clock
frequency of all formats that are recalled. The RATC value will be retained when the
generator is powered down and back up again. Query the current setting of RATC if you
are experiencing problems with the pixel clock or scan rate being off in frequency.
RATC factor
factor
floating point number equal to calibration factor
typical min = 0.99990
typical max = 1.00010
RATC?
factor
RATC 1.00007
// Increases pix clk by factor of 1.00007
783
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