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Turning on the 5725A Amplifier
Warning
To avoid electric shock, make sure the 5725A
is safely grounded as described in Chapter 2
of the Instruction Manual.
Before turning the 5725A on, make sure that
the line voltage selection switches are set
properly for your line voltage. Refer to Figure
4 or the line voltage switch label and check
the line voltage setting now if you have not
already done so.
When you turn on the 5725A, all six front-panel indicators
light briefly and the 5725A undergoes a self test. If the
self test fails, a fault message on the 5700A Control
Display identifies the failure, indicating that you should
service the 5725A.
Caution
After the 5725A passes its self test, it transfers its
calibration constants to the 5700A. During the transfer,
the BOOST indicator on the 5700A flashes. For the few
seconds that the BOOST indicator is flashing, the 5725A
is not usable. After the transfer is complete, the 5725A is
in standby mode. (See "5725A Operating Functions and
Modes" in Chapter 3 of the Instruction Manual for more
information about standby mode.)
Warm Up
When you turn on a cold 5725A, warm it up for 30
minutes to allow the components inside to stabilize. This
ensures that the 5725A meets or exceeds the
specifications.
If you turn off the 5725A after it has warmed up, allow it to
warm up again for at least twice the length of time it was
turned off (up to a maximum of 30 minutes of warm-up).
For example, if the 5725A is turned off for 10 minutes,
allow it to warm up again for at least 20 minutes.
Getting Started
25
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