
16. Harmonic and Intermodulation Distortion Test
16.
Harmonic
and
Intermodulation
Distortion
Test
Specification
Second Harmonic Distortion
Center Frequency Level at Mixer Harmonic Distortion
50 MHz to 700 MHz
S-40
dBm
<-80
dBc
Non-Preselected
100 Hz to 2.5
GHz
s-40
dBm
<-70
dBc
Non-Preselected
2 to 22
GHz
s-10
dBm
<-100
dBc
Preselected
Third Order Intermodulation Distortion
Third-Order Intercept
(TOI):
>
+5
dBm,
100 Hz to 5 MHz
>
+7
dBm,
5 MHz to 5.8
GHz
>
+5
dBm,
5.8
GHz
to 18.6
GHz
Description
Second harmonic distortion in the non-preselected and preselected
bands is checked with a signal source and low-pass filter. The
low-pass filter ensures that the harmonics measured are due to the
analyzer and not the source. Third-order intermodulation distortion
is measured in the non-preselected and preselected bands with two
signal sources. To prevent source interaction, the synthesizer outputs
are padded and combined in a reactive power divider.
Performance Tests
2-65
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