Tektronix SPG8000A, User Manual

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SPG8000A User Manual 137
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POST Results : This readout displays error codes for four internal
modules. The error code numbers should all be “0” (zero). Non - zero
numbers indicate a hardware problem with the instrument and that the
instrument should be returned to Tektronix for service. This readout is not
available from the instrument front panel.
Power Supplies
diagnostic readouts Figure 47 shows the diagnostic information for the power supplies, a subset of the
Mainframe diagnostic information.
Figure 47: Power Supplies diagnostic readouts (load test in progress)
This diagnostic information is shown for each installed Power Supply module:
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Voltage : These readouts display the status of the +12 V supply on each
installed power supply module. If the voltage is within the operating range
OK is displayed; if the voltage is out - of - range, WARN is displayed. If a
power supply module is not installed , PS<1 or 2> 12V: not installed is
displayed.
•
Hours : These readouts display the number of hours that each installed
power supply module has been in the preferred (Active) and backup
(Standby) states. If a power supply module is not installed, PS<1 or 2> not
installed is displayed for that module.
•
TWH
: These readouts display the number of temperature weighted hours
that each installed power supply module has been in operation versus a
limit of 131,400 hours. OK displays if the number of hours is within the
o perating limit; WARN displays when the number of hours exceeds the
limit. For critical applications, you may want to replace the power supply
periodically to prevent down time.
The instrument uses a log to track the number of hours that a power supply
modu le has been powering the instrument. The expected life of a power
supply module varies with the temperature and load. For a fully - loaded