NB3L202K

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7

The above phase noise data was captured using Agilent

E5052A/B. The data displays the input phase noise and

output phase noise used to calculate the additive phase jitter

at a specified integration range. The additive RMS phase

jitter contributed by the device (integrated between 12 kHz

and 20 MHz) is 45.7 fs.

The additive RMS phase jitter performance of the fanout

buffer is highly dependent on the phase noise of the input

source.

To obtain the most accurate additive phase noise

measurement, it is vital that the source phase noise be

notably lower than that of the DUT. If the phase noise of the

source is similar or greater than the device under test output,

the source noise will dominate the additive phase jitter

calculation and lead to an artificially low result for the

additive phase noise measurement within the integration

range.

Additive RMS phase jitter

45.7 fs