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Chapter 1 Getting Started
The Front Panel Indicators at a Glance
Operating Guide 1-3
1
The Front Panel Indicators at a Glance
The front panel includes three LED indicators. These are listed and
described in the following table.
NOTE 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.
Indicator Description
The Standby indicator is lit whenever the Main ~
Power switch on the rear panel is turned ON, and
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
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
at which measurements are triggered. The flash rate
of the LED varies with the settings of the
measurement rate (Rate key) and the measurement
resolution (Resol key). The flash rate of the LED
provides a rough indication of the number of
measurements that are being taken in a given period
of time.
POWER
Standby
FREQ
Gate
Chan
Select