Chapter 1 19
Introduction
Reliability Considerations
Reliability Considerations
Analyzer Input Protection
The analyzer input circuitry can be damaged by power levels that
exceed the maximum safe input-level specifications. Table 1-2 through
Table 1-5 provides the input specifications. To prevent input damage,
these specified levels for your analyzer must not be exceeded.
The analyzer input can also be damaged by large transients. If it is
likely that your analyzer will be exposed to potentially damaging
transients, take whatever precautions are necessary to protect its input
circuitry.
The analyzer input can easily be protected by disconnecting it from the
signal source whenever it is likely that large transients will be present.
When it is impractical to disconnect the analyzer, a transient-limiting
device should be used.
The 11947A Transient Limiter is an analyzer accessory that protects
the input circuitry from transients and accidental overloads. Contact
your local Agilent Technologies sales or service office for more
information about the 11947A.
CAUTION Transients are often produced during electromagnetic interference
(EMI) conducted emissions testing. One type of device, the line
impedance stabilization network (LISN), can produce large transients
when its switch position or voltage input is changed.
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