Editing Spectrum analyzer (section)

=== Displayed average noise level ===
The '''Displayed Average Noise Level''' (DANL) is just what it says it is—the average noise level displayed on the analyzer.  This can either be with a specific resolution bandwidth (e.g. −120 dBm @1&nbsp;kHz RBW), or normalized to 1&nbsp;Hz (usually in dBm/Hz) e.g. −150 dBm(Hz).This is also called the sensitivity of the spectrum analyzer. If a signal level equal to the average noise level is fed there will be a 3&nbsp;dB display. To increase the sensitivity of the spectrum analyzer a preamplifier with lower noise figure may be connected at the input of the spectrum analyzer.<ref>''[https://www.keysight.com/us/en/assets/7018-06714/application-notes/5952-0292.pdf Keysight Spectrum Analyzer Basics] {{webarchive|url=https://web.archive.org/web/20180323154714/http://literature.cdn.keysight.com/litweb/pdf/5952-0292.pdf|date=2018-03-23}}'', p. 50, August 2, 2006, accessed March 25, 2018.</ref>