Agilent Technologies 53152A, 53150A, 53151A manual The Front Panel Indicators at a Glance

NOTE

Chapter 1 Getting Started

The Front Panel Indicators at a Glance

The Front Panel Indicators at a Glance

The front panel includes three LED indicators. These are listed and described in the following table.

Indicator			Description
			The Standby indicator is lit whenever the Main ~
			Power switch on the rear panel is turned ON, and
	POWER		the POWER switch on the front panel is OFF (out).
			During Standby, most of the instrument’s circuits do
			not receive power. However, the timebase and the
			cooling fan are powered so that the temperature in
	Standby		the timebase components remains stable, and if the
			Battery option is installed, the battery-charging
			circuits are powered. When you press the POWER
			switch on the front panel, the Standby indicator goes
			off, and all of the Counter’s circuits receive power.
			When the LED indicator between the arrow keys
			flashes, the arrow keys can be used to navigate and
			change values in menus.
			When you make a change in a menu, always press
			the Enter key to save the setting and exit the menu.
			The Gate LED indicator flashes to indicate the rate
	FREQ		at which measurements are triggered. The flash rate
		Gate	of the LED varies with the settings of the
			measurement rate (Rate key) and the measurement
	Chan		resolution (Resol key). The flash rate of the LED
	Select		provides a rough indication of the number of
			measurements that are being taken in a given period
			of time.

It is normal for the fan in the Counter to run when the Counter is in Standby mode. Power is supplied to the timebase whenever the

Main ~ Power switch is on to maintain long term measurement reliability, and the fan helps maintain timebase temperature stability.

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Operating Guide 1-3