Applies Only To Hp 8340B; Single Sideband Phase Noise - HP 8340B Manual

4-9.
SINGLE SIDEBAND PHASE NOISE
Specification
Table 4-18. Single-sideband
Phase Noise
Specifications
SPURIOUS SIGNALS
[Expressed
in
dB
relative to
the
carrier level (dBc)]
Single-sideband Phase Noise
(dBc/1
Hz BW, CW Mode,
all
power
levels)
Offset 30
Hz
from carrier
Offset 100 Hz
from carrier
Offset
1
kHz from carrier
Offset 10
kHz
from carrier
Offset 100 kHz from
carrier
OPTION 007, Relaxed Phase
Noise
Specifications
Offset 100 Hz from carrier
Offset 1
kHz from
carrier
Offset 10 kHz from carrier
Offset 100
kHz
from carrier
Bands and
Approximate Frequency Ranges
(GHz)
(see Frequency Ranges and Bandswiteh Points for complete description)
BandO
0.01 to
<2.3
<
-64
<
-70
<
-78
<
-86
<
-107
<
-67
<
-75
<
-83
<
-107
Bandl
2.3 to <7.0
<
-64
<
-70
<
-78
<
-86
<
-107
<
-67
< -75
<
-83
<
-107
Band
2
7.0to <13.5
<
-58
<
-64
<
-72
<
-80
<
-101
<
-61
<
-69
<
-77
<
-101
Band
3
13.5 to
<20.0
<
-54
<
-60
<
-68
<
-76
<
-97
<
-57
<
-65
<
-73
<
-97
Band
4^
20.0 to 26.5
<
-52
<
-58
<
-66
<
-74
<
-95
<
-55
< -63
<
-71
<
-95
1
Applies only to
HP 8340B
Description
This test
is performed
in
three steps:
SYSTEM CALIBRATION, PHASE NOISE MEASUREMENT,
and
PHASE NOISE CALCULATION. A second HP 8340A/B
or
HP 8341A/B
is used as
a
local oscillator
(LO) to
mix
down the microwave frequency from the HP 8340B/41B under test (DUT) to
a
1 MHz
IF.
The
IF signal
is
amplified and, for 30 Hz, 100 Hz and
1
kHz
offsets, sent directly to
a
low frequency
spectrum
analyzer (HP
3585A). For
10
kHz and 100 kHz
offsets,
a
1 MHz
notch
filter is inserted
between
the amplifier and the HP 3585A to attenuate
IF signal and
obtain increased dynamic range on
the
HP 3585A. Phase noise
is
measured
using the OFFSET
and
NOISE LVL
functions of the
HP
3585A.
SYSTEM CALIBRATION obtains the system's frequency response data (Cal Data (CD) and
IF Cal
Data (IFCD), measured
in
dBc).
A
zero dBm,
1
MHz
IF
is
established and then the LO frequency
is
reduced to obtain
1.00003,1.0001, and 1.001
MHz IPs. At
each
point,
the power level at the peak of the
IF
is
recorded as the Cal Data (CD).
A 1
MHz notch filter is then inserted between the amplifier and the
HP
3585A. The
LO frequency
is again reduced to obtain
1.01 and 1.1
MHz
IFs, and the Cat Data for
these points
is recorded. The LO frequency
is
then
increased
to obtain
a
1
MHz
IF and
the response
due to the 1 MHz
notch filter
is
recorded as the
IF Cal Data (IFCD). This data
is required for calculating
the actual phase noise for the 10
kHz
and 100 kHz offsets. Since
it is
not required for the
30
Hz, 100 Hz
and
1 kHz
offsets, IFCD
is
defined as
zero
at these
points.
HP 8340B/41B
Performance Tests 4-45