320 Chapter 8
Frequency-Offset Measurement (Option 008)
Measurement of Mixers
Procedures for controlling external signal source
Follow the steps below to control an external signal source.
Step 1. Press - Frequency Offset to display the “Frequency Offset Menu.”
Step 2. Press External Source to display the “External Source Menu.”
Step 3. Press Frequency Format to turn it ON. The frequency setting of the external signal source
(LO) is displayed as shown in
Figure 8-6.
Figure 8-6 Display of external signal source setting
Step 4. Press Control to turn the external signal source control ON, which allows you to send
setting values such as frequency to the external signal source and start the control. If the
external signal source control is turned
ON, (Ctrl) will be displayed on the screen as shown
in
Figure 8-7.
Figure 8-7 Display of external signal source control
NOTE If the external signal source control fails, the GPIB setting may be wrong. See "Setting the
GPIB" on page 426.
3. Avoid Spurious Function
The E5070B/E5071B has the avoid spurious function (Figure 8-8). This function allows
you to implement measurement by avoiding the spurious signal generated from the
following signals:
• Stimulus signal and its harmonics
• Local signal within the receiver and its harmonics
• For an external signal source (if LO Frequency is turned ON), the set signal and its
harmonics
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