128 Keysight EXG and MXG X-Series Signal Generators User’s Guide
Optimizing Performance for All Models
Using the Frequency and Phase Reference Softkeys
When using the signal generator as the input to a system, you can set the frequency multiplier so
that the signal generator displays the output of the system, as illustrated below using a doubler:
When measuring mixers, the frequency multiplier and frequency offset are often used together. In
the upconverter example below, the multiplier is set to
-1 and the offset is set to 3 GHz so that the signal generator displays f
RF
.
Using the Frequency and Phase Reference Softkeys
The MXG/EXG can be set to have either a user-determined frequency or phase reference.
Figure 5-26 Frequency Reference and Frequency Offset Softkeys
Signal Generator Doubler
Output = 4 GHz
X2
Input = 2 GHz
Selected
Multiplier
2
Signal Generator
Output
2 GHz
Entered/Displayed
Frequency
4 GHz
Mixer
Signal Generator
(local oscillator)
f
LO
= 800 − 600 MHz
f
IF
= 3000 MHz
Selected
Multiplier
−1
−1
Signal Generator
Output (f
LO
)
800 MHz
600 MHz
f
RF
= 2200 2400 MHz
Selected
Offset
3000 MHz
3000 MHz
Entered/Displayed
Frequency
(f
RF
)
2200 MHz
2400 MHz
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