HP 8340B Manual page 54

4-9.
SINGLE SIDEBAND PHASE NOISE (Cont'd)
PHASE
NOISE CALCULATION
38. Using the data obtained
in Table 4-19 and Table 4-20, calculate and enter the Actual Phase Noise
into
Table 4-21.
For example: Assume the following data was obtained for the 30 Hz offset
at
26.032 GHz
CD
=
0
dB (obtained in
step 13)
MNL
=
-50.8
dB (obtained
in
step 27)
IFCD
Is
defined to be
0
for
a
30 Hz offset (also for 100
Hz
and
1
kHz)
Therefore
Actual
Phase Noise
=
MNL
+
IFCD
-
CD
-
3 dB
=
-50.8
+0-0-3
=
-53.8
The value
-53.8
would be entered
into
Table 4-22.
For
example: Assume the following data was obtained for the
10
kHz offset at 2.202 GHz
CD
=
—25.6 dB (obtained
in
step 19)
IFCD
=
-44
2 dB (obtained
in
step 22)
MNL
=
-66.0
dB (obtained in
step 34)
Therefore
Actual Phase Noise
=
MNL +
IFCD
-
CD
-
3 DB
=
-66.0
+
(-44.2)
-
(-25.6) -3
=
-87.6
The value —87.6 would be entered into Table 4-22.
Table
4-22. Phase Noise Test Results
Actual' Single Sideband Phase Noise
(dBc/1 Hz)
Offset (Hz)
303
100
1K
10K
100K
2.202
GHz
6.902
GHz 13.402 GHz 19.502 GHz 26.032 GHz2
1 Actual
-
MNL +
IFCD
-
CD
-
3dB
where
(FCD
=
0 for 30 Hz, 100 Hz, and
1 kHz
offsets
-
value measured
in
step 22 (see
Table 4-19) for
10K and 100 kHz offsets
2
Applies
only to HP 8340B
3
Not applicable to instruments
equipped with Option 007, Relaxed Phase Noise Specifications
HP 8340B/41B
Performance Tests
4-51/4-52