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15. Spurious Responses Test
Note
Equipment
Procedure
SYNTHESIZED SMEEPEA
Figure 2-25. Harmonic Distortion Test Setup
Equipment listed is for two test setups, Figure 2-25 and Figure 2-26.
Synthesized Sweeper . . . . . . . . . . . . . . . . . . . . . . . .
Frequency Synthesizer . . . . . . . . . . . . . . . . . . . . . .
10 dB Attenuator (2 required) ..............
to BNC (f) (2 required)
(m)
Adapter, Type N
(m)
Adapter, Type N
to SMA (f) . . . . . . . . . . . . .
Adapter, Type N (f) to BNC (m) . . . . . . . . . . . . .
Adapter, Type N (f) to BNC (f) . . . . . . . . . . . . . .
Directional Bridge . . . . . . . . . . . . . . . . . . . . . . . . . . .
Harmonic Distortion
1. Connect equipment as shown in Figure 2-25.
2. On the spectrum analyzer, press
the spectrum analyzer as follows:
CENTER FREQUENCY . . . . . . . . . . . . . . . . .
FREQUENCY SPAN . . . . . . . . . . . . . . . . . . . .
REFERENCE LEVEL
3. On the synthesized sweeper, key in
-10 dBm.
(
)
P O W E R L E V E L
4. On the spectrum analyzer, key in DISPLAY LINE CENTER] -90
[
PEAK
the displayed 280 MHz signal.
5. On the synthesized sweeper, press
ENTRY knob to adjust the amplitude of the displayed 280 MHz
SPECTRUM ANALYZER
ATTENUATOR
300 MHZ LPF
. . . . . . . . HP 1250-0780
).
PRESET
. . . . . . . . . . . . . . . . 10 kHz
. . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . .
PRESET
to position a marker on the peak of
LEVEL
HP 8340A
H P 3335A
. . . . . . . HP 0955-0455
. . . . . . . HP 1250-1250
. . . . . . . HP 1250-0077
. . . . . . . HP 1250-1474
. . . . . . . . . . . HP 8721A
. . . . . . . HP 0955-0306
Set the controls of
MHz
20 dBm
280
MHz,
], Icw)
and use the
]
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