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15. Spurious Responses Test
-0
-10
-20
z
E
i.i
-30
z
3 -40
Q
2
-50
-60
-70
Note
If unable to locate intermodulation distortion products, temporarily
increase output power level of frequency synthesizer and synthesized
sweeper by
+
10
dB.
Return the output power level of both
signal sources to the previous settings before making distortion
measurements.
20. On the spectrum analyzer, key in MARKER
[n),
[CENTER FREQUENCY) 31 MHz, MARKER [PEAK SEARCH) to position
a marker at the peak of the 31 MHz third-order intermodulation
product. The response should be below the display line
(GO
dB
below the input signals).
TO1
Distortion (1 MHz separation
@
30 MHz)
dBm
21. On the spectrum analyzer, key in [CENTER FREQUENCY) 28 MHz,
MARKER [PEAK SEARCH] to position a marker at the peak of the 28
MHz third-order intermodulation product. The response should be
below the display line
(>80
dB
below the input signals).
TO1
Distortion (1 MHz separation
@
30 MHz)
dBm
fl
fz
SECOND
HARMONICS
FROM SIGNAL
GENERAToRS
\
211
2f2
-
f2
-
fl
L
SECOND
SECOND
ORDER
THIRD
ORDER
ORDER
Figure 2-27. Intermodulation Distortion Products
22. On the frequency synthesizer, key in [FREQUENCY) 29.99 MHz.
23. On the spectrum analyzer, key in MARKER
IOFF),
CCENTER
FREQUENCY) 29.99 MHz, DISPLAY LINE
[ENTER]
-90
dBm,
MARKER (PEAK SEARCH).
Performance Tests 2-53