The built-in pre-amplifier boosts weak input
signals, such as EMI testing signals, to levels
that are easy to handle, over the entire
frequency range. The built-in pre-amplifier on
the GSP-9300 has a nominal gain of 20dB.
In the Auto setting, the pre-amplifier will be
automatically turned on when the reference
level is less than -30dBm. When the reference
level is greater than -30dBm, the pre-amplifier
is turned off. The bypass setting turns the pre-
amplifier off.
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