Performance Verification
Check Displayed Average
Noise Level (DANL)
This test does n
ot require an input signal.
The test measures the average internal noise level of the instrument, ignoring
residual spur
s.
It checks four ranges:
50kHzto5MHz(allmodels)
5MHzto3GHz(allmodels)
3 GHz to 4 GHz (MDO4104-6 and MDO4054-6 only)
4 GHz to 6 GHz (MDO4104-6 and MDO4054-6 only)
NOTE. If the specific measurement frequency results in measuring a residual spur
that is visible above the noise level, the DANL specification applies not to the
spur but to the noise level on either side of the spur. Please refer to the Spurious
Response specifications. (See page 19.)
88 MDO4000 Series Specifications and Performance Verification
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