Test Procedures R&S SMB
1407.0806.82 1.14 E-5
Nonharmonics
Test equipment Same as for harmonics
Test setup Same as for harmonics
Measurement Setting on analyzer:
Reference level = 0 dBm, 10 dB/div.
Span 50 Hz,
Resolution bandwidth 10 Hz
Setting on DUT
Level = 0 dBm
First the carrier level P
f
is measured at the test frequency f as
reference and then the signal level P
search
is measured at the
analyzer search frequency.
The nonharmonic spacing D is the measured level referred to the
reference level:
D = P
f
- P
search
(in dBc = referred to the carrier)
Note: Some of the nonharmonics suppression values measured
might be outside the analyzer specifications. In case of
doubt, repeat the measurement with a 3 dB attenuator at
the analyzer input. If the nonharmonic spacing changes
the nonharmonic is due to the analyzer.
Alternative: Check with a second source with differing synthesizer
architecture (not a R&S SMB)
Recommended settings and search frequencies:
DUT Frequency Analyzer search
frequency
13 MHz 9 MHz
13 MHz 22 MHz
17 MHz 15 MHz
23.4375 MHz 6.25 MHz
23.4375 MHz 29.6875 MHz
511.2 MHz 511.392 MHz
1050.1 MHz 1050.15714 MHz
1100.01 MHz 1100.02 MHz
2045 MHz 2045.133329 MHz
4086 MHz 4086.72 MHz
4289.8 MHz 4293.42975 MHz
4521.6 MHz 4522.351807 MHz
4745 MHz 4745.05747 MHz
5180 MHz 5184.473684 MHz
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