Keysight E8663D, User Manual

Page: 159 / 358

145
Keysight Technologies
E8357D/67D & E8663D PSG Signal Generators
User’s Guide
4 Optimizing Performance
In the following sections, this chapter describes procedures that improve the
performance of the Keysight PSG signal generator.
— “Using the ALC” on page 145
— “Using External Leveling” on page 147
— “Creating and Applying User Flatness Correction” on page 151
— “Using the Option 521 Detector Calibration (Option 521)” on page 166
— “Adjusting Reference Oscillator Bandwidth (Option UNR/UNX/UNY)” on
page 167
— “Optimizing Phase Noise and Harmonics Below 3.2 GHz (Option
UNX/UNY)” on page 168
— “Wideband IQ/FM Mode <3.2 GHz (Option 018)” on page 171
Using the ALC
Selecting ALC Bandwidth
CAUTION
Internal leveling works from –15 dBm to maximum power.
For internal leveling, the signal generator uses automatic leveling control (ALC)
circuitry prior to the RF output. ALC bandwidth has five selections: automatic,
100 Hz, 1 kHz, 10 kHz, and 100 kHz. In automatic mode (the preset selection),
the signal generator automatically selects the ALC bandwidth depending on
the configuration and settings (see Figure 4-1 ).