Agilent Technologies E4400-90326 Darken in comparison to the text on the display, Generators

Exploring the User Interface		ESG Family Signal Generators
Front Panel
11.	Return	The Return key cancels the current active function and moves you
		from your current softkey menu to the softkey menu that precedes
		it.
12.	Display	Press this key and hold it down to cause the display background to
	Contrast	darken in comparison to the text on the display.
	Decrease
13.	Display	Press this key and hold it down to cause the display background to
	Contrast	brighten in comparison to the text on the display.
	Increase
14.	Local	Press this key to return the signal generator to local (front panel)
		control from remote operation.
15.	Preset	Press this key to set the signal generator to a known state (either
		the factory-defined state or a user-defined state).

16.Standby LED This yellow LED lights when the instrument is in standby condition. In standby, the power switch is off but the instrument is still connected to the main power circuit by way of the power cord.

17. Line Power	This green LED lights when power is cycled on to the signal
LED	generator.

18.Power Switch Press this hardkey to turn power to the signal generator either on

(green LED on) or to standby (yellow LED on).

19.	Q INPUT	This connector accepts an externally supplied, analog,
		quadrature-phase component of I/Q modulation. This female BNC
		connector is provided only on ESG-D and ESG-DP Series Signal
		Generators.
20.	I INPUT	This connector accepts an externally supplied, analog, in-phase
		component of I/Q modulation. This female BNC connector is
		provided only on ESG-D and ESG-DP Series Signal Generators.

2-4 Quick Start Guide