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H
52382-900A
Vol.
1
para.
32
(continued)
Resolution
Resolution bandwldths
Twelve filters with
3
dB
bandwidths
of
3
Hz
to
I
MKz In
a
1»3>10 sequence.
Optimally selected
for
chosen span
In
AUTO mode
or
manually
selected by
dedicated
keys.
Refer
to Fig.
2.
Accuracy
3
dB points
within
±20%
of
their nominal
value
apart from the
1
MHz filter
which
Is
•^0%
-30%.
Shape factor
All
bandwidths
have
a
skirt selectivity for
60 dB/
3
dB points of less than 11:1.
All filters (apart
from
the
1
MHz filter) are
synchronously
tuned five
pole Gaussian shaped filters.
1
MHz filter shape factor
is
less than 5:1.
Frequency
Fig.
2
Typical spectrum analyzer resolution
Stability
Residual FM
Less than
1.5 Hz
peak-to-peak during
a 10
s
period
for
spans narrower
than
20 kHz,
resolution
bandwidth
of 30 Hz or
less and
video bandwidth
of
43 Hz or less.
Drift
After
a
1
hour warm-up
the LO drift rate
Is as
follows:
<10 Hz/mln
at 10
Hz/dlv» increasing
to
<20
Hz/raln at
2
kHz/dlv.
<500 Hz/mln
at 5
kHz/dlv. increasing
to
<1
kHz/raln at
200 kHz/dlv.
<50 kHz/mln
at
500 kHz/dlv. Increasing
to
<100 kHz/mln
at 40
MHz/dlv.
Chap.
1
Page
12
Sep. 85
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