18.
NNNNNNNNNNNNNNNNNNNNNNN
REF
LVL
increases
the
dynamic
range
of
the
measurement
by
changing
the
input
attenuator
and
IF
gain.
It
makes
sure
the
input
signal
is
not
in
gain
compression.
T
o
increase
the
dynamic
range
of
the
measurement,
press
4
AMPLITUDE
5
NNNNNNNNNNNNNNNNNNNNNNN
REF
LVL
4
+
5 .
Note
that
while
increasing
the
dynamic
range
,
more
errors
are
introduced
into
the
measurement.
Figure
3-32
shows
the
results
of
increasing
the
dynamic
range
.
Notice
that
the
top
of
the
screen
does
not
necessarily
represent
the
gain-compression
limit.
Figure
3-32.
Increased
Dynamic
Measurement
Range
HP
85640A
RF
T
racking
Generator
Operation
and
Service
Manual
Operation
3-29
Summary of Contents for 85640A
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