Specifications

86 Chapter 10
Using External Millimeter Mixers (Option AYZ)
Making Measurements with Agilent 11974 Series Preselected Harmonic
Mixers
Using External Millimeter Mixers
(Option AYZ)
Making Measurements with Agilent 11974
Series Preselected Harmonic Mixers
Preselected mixers apply a tracking filter to the input signal before
sending it to the mixer. This makes the displayed results easier to
understand because it eliminates the multiple mixing products that are
displayed using harmonic mixers (see “Making Measurements With
Agilent 11970 Series Harmonic Mixers” on page 82).
Step 1. Connect the signal source and preselected mixer to the analyzer as
shown in Figure 10-3.
Figure 10-3 Instrument Connections with a Preselected Harmonic Mixer
Step 2. Configure the analyzer for preselected external mixing:
Press
Input/Output, Input Mixer, Input Mixer (Ext), Mixer Config, Mixer Type
(Presel).
Step 3. If necessary, adjust the tracking of the preselected harmonic mixer
using the procedure “Frequency Tracking Calibration with Agilent
11974 Series Preselected Harmonic Mixers” on page 88.
Step 4. Select the desired mixing band. In this example an Agilent 11974Q (33
to 50 GHz mixer) is used:
Press
Input/Output, Input Mixer, Ext Mix Band, 33−50 GHz (Q).
Step 5. Set the microwave source to a frequency of 40 GHz and an amplitude of
−15 dBm.
Step 6. Enter the conversion-loss data for the mixer, to calibrate the amplitude