Procedure - HP 8340B Manual

4-9.
SINGLE SIDEBAND PHASE NOISE (Cont'd)
Equipment
Synthesized Sweeper (Local Oscillator)
..
HP 8340A/B
Opt.
001
or any HP 8341 A/B2
Spectrum Analyzer
..........................................
HP HP 3585A
Power
Amplifier
................................................
HP 8447F
Attenuator
.............................................
HP 8493C Opt. 010
Mixer
...............................................
HP P/N 0955-0307
Adapters
APC 3.5 (f)
to
APC
3.5 (f)
................................
HP P/N
5061-5311
(1
required
if DUT
is
HP 8340B)
Type
N (m) to APC 3.5 (f)
................................
HP P/N 1250-1744
(1 required
if
DUT
is
HP 8341 B)
Type
N (m)
to
APC 3.5 (m)
...............................
HP P/N 1250-1743
(1 required if LO
is
HP 8341A/B)
SMA (m) to BNC (f)
....................................
HP P/N 1250-1200
Cable (Semi-Rigid SMA male
to
SMA
male)
.................
HP P/N 08340-20124
Foam Pads
...................................
(Refer to
note following step 1)
1
MHz Notch Filter
......................
(See schematic
in
Recommended Test
Equipment
list, at the beginning of this section)
NOTE
It
is important that the mixer
be connected directly to
the LO's RF
Output
connector.
Procedure
1.
Connect equipment as shown
in
Figure
4-9 with
the amplifier connected directly to the HP 3585A
50 Ohm
input.
NOTE
The foam pads
shown in Figure 4-9 are required
to isolate the DUT and
LO from
mechanical vibrations which could induce phase noise.
NOTE
In this procedure, the
LO is
programmed
for
+10
dBm. At
some
points
the LO may indicate an unleveled
condition. This
is to be expected
and
does not affect the phase noise measurement.
2.
On the LO,
press
[INSTR PRESET] [CW] [2]
[.]
[2] [0] [1] [GHz] [POWER LEVEL] [1] [0] [dB(m)]
[PEAK].
3. On the
DUT,
press
[INSTR PRESET] [CW][2] (.]
[2] [0] [2] [GHz] [POWER LEVEL] [0] [dB(m)]
[PEAK].
4.
On the HP 3585A, press INSTR PRESET, CENTER FREQUENCY,
1 MHz, FREQUENCY
SPAN,
1
MHz.
5.
Switch the HP 3585A AUTO
RANGE and REF LVL TRACK
off.
6.
Allow the equipment
to
warm up for
1
hour.
2
usable
only with HP 8341B DUT
HP 8340B/41B
Performance Tests 4-47