Agilent Technologies 83620A - Page 114

Equipment
Sp
ectrum
Analyzer
HP
8566B
1
Micro
w
a
v
e
Amplier
HP
11975A
Harmonic
Mixer
(20
to
26.5
GHz)
HP
11970K
Harmonic
Mixer
(26.5
to
40
GHz)
HP
11970A
Harmonic
Mixer
(40
to
50
GHz)
HP
11970Q
1 Firm
ware
revision 13.8.86
or
later.
14.
On
the
sp
ectrum
analyzer,
select
the
external
mixer
for
the
20
to
26.5 GHz
frequency
range
and
set
the
reference lev
el
oset
to
comp
ensate
for
the
mixer's con
v
ersion
loss
at
23
GHz.
15.
On the
synthesizer,
press:
4
CW
5
4
23
5
4
GHz
5
16.
Set
the
micro
w
a
v
e
amplier
output
p
o
w
er
lev
el
to
+16
dBm.
17.
On the
spectrum
analyzer,
set:
Center
Frequency: 23
GHz
Frequency
Span:
1
MHz
Adjust
the
reference
lev
el
to
position
the
signal
p
eak
at
the
top
reference
graticule.
Use
this
reference
lev
el
for
all
harmonic
measuremen
ts.
18.
On
the
sp
ectrum
analyzer,
set:
Start
Frequency:
20
GHz
Stop Frequency:
26.5 GHz
19. Man
ually sw
eep the
syn
thesizer
across
the
frequency
range
while
c
hec
king
the
sp
ectrum
analyzer
displa
yfor
harmonics and
subharmonics. See
T
able
2-11
for
the
YO
frequency
ranges
that
corresp
ond
to
the
RF
output
frequencies.
Since
an
external
mixer is
used,
use
the
sp
ectrum
analyzer
signal
iden
tify
feature to v
erify that susp ected signals are in the 20 to 26.5 GHz frequency
range. The signals most likely to app ear are the fth
and sixth YO
harmonics.
20. Compare the amplitude of the harmonics and subharmonics to the
specications listed in the test
record. If an
y harmonics or subharmonics
are within 5 dB of the sp ecication, mak
e a more accurate measuremen
t
using the \Harmonic/Subharmonic V
erication Pro cedure
> 20 GHz" that
2-44 Performance Tests
Spurious Signals (Harmonics Subharmonics)
HP 8360
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