3.
Level
Flatness
Specication
Flatness:
<62.0
dB
referenced
to
300
MHz,
10
dB
attenuation,
0
dB
vernier
setting
Related
A
djustment
P
ower
level
adjustment
Description
The
tracking
generator's
RF
OUTPUT
is
connected
to
the
host
spectrum
analyzer's
INPUT
50.
Tracking
is
adjusted
at
300
MHz
for
a
maximum
signal
level.
The
tracking
generator's
RF
OUTPUT
is
then
connected
to
a
calibrated
power
sensor
and
the
power
level
is
measured
at
300
MHz.
The
measuring
receiver
is
set
to
RA
TIO
mode
so
that
subsequent
power-level
readings
are
dB
relative
to
the
power
level
at
300
MHz.
The
tracking
generator
is
stepped
through
several
frequencies
within
its
range
.
The
output-power
dierence
relative
to
the
power
level
at
300
MHz
is
measured
at
each
frequency
and
recorded.
Figure
4-4.
Level
Flatness
T
est
Setup
4-12
P
erformance
T
ests
HP
85640A
RF
T
racking
Generator
Operation
and
Service
Manual
Summary of Contents for 85640A
Page 2: ...HP 85640A RF Tracking Generator Operation and Service Manual ABCDE Printed in USA ...
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