Agilent Technologies 346B Specifications download pdf (Page 29)

Chapter 2 2-5

Example Measurements

Equipment for Test Set-ups

In the example, a low amplitude, 26 GHz signal is generated with the Agilent 83650B. The

amplitude was further reduced by using an 8490D coaxial attenuator, which produced a

signal that was hidden in the noise floor of the spectrum analyzer in normal operation.

Refer to Figure 2-2, “Analog Input Signal with Preamp OFF.”

Figure 2-2 Analog Input Signal with Preamp OFF

When the internal preamp is turned on, the noise floor of the spectrum analyzer is

reduced, revealing the signal of interest. Refer to Figure 2-3, “Analog Input Signal with

Preamp ON.”

Figure 2-3 Analog Input Signal with Preamp ON

Preamp

Control

"OFF"

Preamp

Control "ON"

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Agilent Technologies 346B Specifications Page 29