HP 8568B, Руководство по испытаниям и регулировке работы, Страница: 75 / 313

15. Spurious Responses
- 0
- 1 0
- 2 0
- 3 0
3 - 4 0
- 5 0
- 6 0
- 7 0
Note
If unable to locate intermodulation distortion products, temporarily
increase output power level of frequency synthesizer and synthesized
sweeper by 10
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
[
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
below the input signals).
Distortion (1 MHz separation 30 MHz)
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
below the input signals).
Distortion (1 MHz separation 30 MHz)
S E C O N D
H A R M O N I C S
F R O M S I G N A L
S E C O N D S E C O N D
O R D E R
T H I R D
O R D E R
O R D E R
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
FREQUENCY
)
29.99 MHz, DISPLAY LINE -90
MARKER
(
PEAK SEARCH
).
Performance Tests 2-53