Agilent Technologies E8247C PSG CW - Manual (Page 69)

59
3
Optimizing Performance
In the following sections, this chapter describes procedures that improve the performance of the Agilent PSG
signal generator.
• Selecting ALC Bandwidth (below)
• “Using External Leveling” on page 60
• “Creating and Applying User Flatness Correction” on page 64
• “Adjusting Reference Oscillator Bandwidth (Option UNR)” on page 76
Selecting ALC Bandwidth
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 adjusts the ALC bandwidth among three of
the four possible settings, depending on the active functions (see
Figure 3-1 ).
Figure 3-1 Decision Tree for Automatic ALC Bandwidth Selection
To Select an ALC Bandwidth
Press
Amplitude
>
ALC BW
>
100 Hz
,
1 kHz
,
10 kHz
, or
100 kHz
.
This overrides the automatic ALC bandwidth selection with your specific selection.
RF OUTPUT
< 2 MHz
AM OFF
PULSE OFF
AM OFF
PULSE ON
AM ON
PULSE ON
AM ON
PULSE OFF
ALC BW
100 Hz
ALC BW
1 kHz
ALC BW
10 kHz
ALC BW
100 kHz
Yes
No No No No
Yes Yes
Yes Yes