Tektronix SPG8000A, User Manual, Page: 50 / 243

36 SPG8000A User Manual
Configure Preferred (Active) Supply
T o configure which Power Supply module is the preferred (active) supply:
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 saved as part of the preset system.
Therefore, the preferred supply configuration will not change when you
activate any of the system presets, including the Factory Default preset. (See
Presets submenu.)
This procedure uses the front panel controls on the instrument to configure the
preferred (active) supply. You can also use the System > General Settings
submenu in SPG8000A Web Interface to configure the preferred supply. (See
General Settings submenu.)
1. Check the status of the front - panel PWR1 and PWR2 indicators:
•
Bright green indicates the preferred (active) supply.
•
Dim green indicates the inactive (backup) supply.
Note :
If the color of the PWR1 or PWR2 indicators is other than bright or dim
green, service the faulty Power Supply module before continu ing.
2. Check the temperature weighted hours of the installed supplies:
Note : We recommend 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. (See
Temperature weighted hours (TWH)
.)
a. Press SYSTEM to access the SYSTEM menu.
b. Press the up (▲) or down (▼) arrow button to select
SYSTEM : DIAGNOSTICS , and then press ENTER to
access the DIAGNOSTICS menu.