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Operating Basics

Conﬁguring the

preferred (active) supply

(Option DPW only)

When two Power S

upply modules are installed in the instrument, one is conﬁgured

as the primary supply and the other is conﬁgured as the backup supply. In the

event that the primary supply fails, the backup supply automatically provides

power to maintain instrument operation.

NOTE. The preferred supply conﬁguration only applies if two Power Supply

modules are installed and both of the supplies are connected to a power source.

If there are

two Power Supply modules installed but one of the supplies has a

failure, the good supply will be used to power the instrument regardless of the

preferred supply conﬁguration.

The recommended usage strategy is to conﬁgure one supply as preferred, and use

the second supply only in case the ﬁrst supply has a failure. This usage strategy

allows the backup supply to have the maximum remaining life when it is needed.

The preferred supply conﬁguration is not set as part of the Hardware Initialization

function. Therefore, the preferred supply conﬁguration will not change when you

reset the instrument using the Hardware Initialization function.

Perform the following steps to conﬁgure which Power Supply module is the

preferred (active) supply:

1. Check the status of the front-panel DC LED indicators on both supplies:

Bright green indicates the current preferred (active ) supply

Dim green indicates the current inactive (backup) supply

NOTE. If the color of the LED indicators is other than bright or dim green,

service the faulty Power Supply module before proceeding.

2. Check the temperature weighted hours of the installed supplies:

NOTE. It is recommended that you conﬁgure the supply with the most temperature

weighted hours to be used as the primary preferred supply. This allows for the

newer supply to be preserved so it can provide the best possible backup should the

primary supply fail. For m ore information about temperature weighted hours,

see the ECO8000 Series Quick Start User Manual.

a. From the top-level Main menu, press the up (▲)ordown(▼) arrow

button to select SYSTEM CONFIG , and then press the ENTER button

to access the SYSTEM CONFIGURATION menu.

ECO8000 Series Automatic Changeover Unit User Manual 37

Tektronix ECO8000 Series User Manual

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