Specifications

2-6 Chapter 2
Example Measurements
Equipment for Test Set-ups
Digital Test Set-up
Using the Agilent Technologies E444xA Option H26 will allow the user to view low
amplitude digital signals. Use the following instrument set-up to view an example of a
digital signal. Use the “Front Panel Key Select” on page 3-3 and “GPIB Control of Preamp
Gain” on page 3-4 to control the instrument while making measurements.
Figure 2-4 Digital Test Set-up
The test set-up shown in Figure 2-4, “Digital Test Set-up” can also be used to look for a low
amplitude modulated signals. In the example, we try to see the carrier suppression of a
multi-tone digital signal. The 20 GHz signal was generated by an Agilent E8267C Vector
Signal Generator.
The E8267C was configured using the following keystrokes:
[AMPLITUDE] > -60 > dBm [MODE] > Multitone > On
The default settings of the source were used to produce the signal as shown. The amplitude
was reduced even further by using a coaxial attenuator, model number 8490D.