Figure 2-23 Signal Peak Set To Reference Level - Agilent Technologies 8560E User Manual

Making Measurements
Example 5: Third-Order Intermodulation Distortion
Figure 2-23 Signal Peak Set to Reference Level
Maximize dynamic range
12.Distortion-free dynamic range is important for this type of
The spectrum analyzer automatically sets the attenuation so the
maximum signal level is −30 dBm at the input mixer when the signal is
at or below the reference level (see Example 1). You will hear the input
attenuator click; notice that the value of the attenuator is now 20 dB
(see Figure 2-24 on page 79).
This change to the maximum mixer level can affect the noise, so you
may need to adjustment the resolution and video bandwidths.
Set a second marker and measure the distortion product
Once a marker is activated, the marker delta function activates a
second marker and displays the difference between the two markers.
Relative measurements can then be performed easily.
78
b. Set the reference level to this value by pressing
MARKER → REF LVL
resulting display.
measurement. To maximize such dynamic range:
a. Set the mixer input level to −30 dBm by pressing
,
MORE 1 OF 3 MAX MXR LEVEL
b. Enter −30 dBm.
. Figure 2-23 on page 78 illustrates the
.
MKR →
,
,
AMPLITUDE
Chapter 2