214 Chapter4
Key Function Descriptions
Key Descriptions
The measurement state parameters that may be
changed include:
• resolution bandwidth
• video bandwidth
• span
• sweep time
• detector mode
• gating parameters
• trigger parameter
• video averaging
Front-panel key access:
MEAS/USER
ADJ CURRIF STATE Executes a routine that adjusts only the current
bandwidth state. During this adjustment, the message
IF ADJUST STATUS: <text> appears in the active
function area. Depending on which portion of the IF
system is being adjusted, either AMPLITUDE or a specific
resolution bandwidth (for example, 1 MHz) is displayed
in the message.
Front-panel key access:
CAL
AGC
ON OFF Switches automatic gain control (AGC) ON or OFF.
AGC keeps the volume relatively constant during AM
demodulation. AGC operates only during AM
demodulation and when the frequency span is greater
than 0 Hz.
Front-panel key access:
AUX CTRL
ALC
INT EXT For Option 002 only: Activates internal (INT) leveling
or external (EXT) leveling. The external leveling input
is located on the rear panel of the analyzer.
Negative-polarity detectors are supported. External
leveling increases the amplitude accuracy by improving
the effective source match.
Front-panel key access:
AUX CTRL
ALL Sets the following functions to coupled mode: resolution
bandwidth, video bandwidth, sweep time, input
attenuator, center-frequency step-size, and units.
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