HP (Hewlett-Packard) 8360 ユーザーズマニュアル

Leveling Mode

Normal

ALC

This 

 lets you set the leveling mode of the synthesizer to

continuous leveling at the desired leveling point. In this mode, the
RF OUTPUT is controlled by the automatic level control (ALC)
circuit, otherwise referred to as the leveling loop. The attenuator
works in conjunction with the ALC to achieve the full range of
power levels. At factory preset, ALC normal is the default state. An
asterisk next to the key label indicates that this feature is active.

SCPI: POWer:ALC:STATe 

Analyzer: 

Al, internal normal; 

 external normal; 

 external

power meter normal; 

 source module normal.

Leveling Mode

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ALC

This 

 causes the ALC to switch off once the desired power

level is reached. When this leveling mode is activated, or when
power, or frequency is changed, the synthesizer switches to CW
frequency and closes the ALC system until the desired power level is
reached. The synthesizer reverts to its original frequency/modulation
state and opens the ALC system. This mode is similar to ALC off
mode and is useful for narrow pulse applications. An asterisk next to
the key label indicates that this feature is active.

SCPI: 

POWer:ALC:STATe 

Analyzer: 

 

 Pulse Modulation

“Working with Spectrum Analyzers,” in Chapter 1.