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2
Safety and Preparation for Use
WARNING
AC Line Voltage
Line Cord
Service
Dangerous voltages, capable of causing injury or death, are present in
this instrument. These voltages can persist for many minutes after AC
power is removed. Do not remove the product covers or panels. Do
not apply power or operate the product without all covers and panels
in place.
The SR446 400 MHz Programmable Gain Preamplifier operates from a
90 V–250 V nominal AC power source having a line frequency of 50 Hz
or 60 Hz.
The SR446 400 MHz Programmable Gain Preamplifier has a detachable,
three‑wire power cord for connection to the power source and to a
protective ground. The chassis of the instrument is connected to the
outlet ground to protect against electrical shock. Always use an outlet
which has a properly connected protective ground.
The SR446 400 MHz Programmable Gain Preamplifier does not have any
user serviceable parts inside. Refer service to a qualified technician.
Do not install substitute parts or perform any unauthorized modifications
to this instrument. Contact the factory for instructions on how to return
the instrument for authorized service and adjustment.
SR446 400 MHz Programmable Gain Preamplifier
General Information
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