Chapter 2 35
Front and Rear Panel Features
Rear-Panel Features
14 Power On Selection selects an analyzer power preference.
The
PWR ALWAYS ON setting turns the analyzer on whenever external power is
applied. This mode is useful if an external power switch is used to control a rack of
several instruments. Nevertheless, if you set the analyzer to standby using the front
panel
Standby key (see Figure 2-2. on page 22, item 21) and the external power is
removed and restored within 20 seconds, the analyzer will remain in standby.
The
PWR NORM setting assigns analyzer on/off control to the front-panel On and
Standby keys (see Figure 2-2. on page 22, item 21). If the analyzer is on and the
external power is removed and restored within 20 seconds, the analyzer will turn
on. On the other hand, if the external power is removed and restored after 20
seconds, the analyzer will remain in standby regardless of the front panel switch
settings.
15 DC Fuse protects the analyzer from drawing too much dc power. Replace only with a
fuse of the same rating. See the label on the rear panel.
Power Always On
Analyzer state before removing
power
A lapse in power
< 20 sec.
A lapse in power
> 20 sec.
On On On
Standby Standby On
Power Norm
Analyzer state before removing
power
A lapse in power
< 20 sec.
A lapse in power
> 20 sec.
On On Standby
Standby Standby Standby
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