Quick Start
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Instrument Message/Warning
Displays instrument messages and warnings. Instrument messages are
displayed in gray and warnings in red.
DC Bias ON/OFF Indicator
Value Description
DC ON (displayed in red) DC Bias is turns ON.
DC OFF (displayed in dark) DC Bias is turns OFF.
Display Update Off Indicator
When information update display on the LCD screen is turned off, this
indicator is displayed in red.
Measurement Status
Displays the measurement status of the E4990A.
Value Description
Setup
Setup for measurement in progress
Hold
Measurement on hold (idling)
Man
The trigger source is set to "Manual" and waiting for trigger.
Ext
The trigger source is set to "External" and waiting for trigger.