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+What: /sys/bus/iio/devices/iio:deviceX/out_altvoltageY_frequency_resolution
+KernelVersion: 3.4.0
+Contact: linux-iio@vger.kernel.org
+Description:
+ Stores channel Y frequency resolution/channel spacing in Hz for PLL
+ devices. The given value directly influences the operating mode when
+ fractional-N synthesis is required, as it derives values for
+ configurable modulus parameters used in the calculation of the output
+ frequency. It is assumed that the algorithm used to compute the various
+ dividers is able to generate proper values for multiples of the channel
+ spacing.