Agilent Technologies 89410A Getting Started Manual page 23

Measured noise band
The diamond-shaped
marker provides a
reference point
Carrier to noise ratio
normalized to one Hertz
7
Change to a normalized noise measurement:
Toggle to [
power ratio C/No
The display should appear as below. The grid lines have been turned off to
highlight the band power markers.
The carrier-to-noise and carrier-to-normalized-noise marker measurements
require that the standard (diamond shaped) marker be on the signal peak as a
reference. If the marker is not on, the displayed value will only reflect the noise
level.
Now the value indicated in the lower left corner of the display reflects the difference
between the marker level at the carrier peak and the noise-power within the band
markers normalized to one Hertz bandwidth.
This type of measurement is often used to measure adjacent-channel power.
Another method is shown on the following page.
You can perform band power measurements in either Vector or Scalar Mode. If
you use Scalar mode and you have selected a combination of resolution
bandwidth, window type, and number of frequency points such that the analyzer
implements the detector, the analyzer will prompt you to select the sample
detector in order to calculate the band power accurately.
]
Making Simple Noise Measurements
2-5