Test sequence R&S®SML / R&S®SMV03
1090.3123.12 10.10 E-6
measure the level at any visible spurious.
Analysis The spurious suppression ratio is the difference in level between the
detected spurious referenced to the output signal from the R&S SML /
R&S SMV03 (in dBc = referenced to the carrier)
Spurious suppression (subharmonic spurious, for R&S SML02/03 / R&S SMV03
only)
Test setup Test setup 1, spectrum analyzer mode
Settings on R&S SML /
R&S SMV03
- UTILITIES REF OSC SOURCE EXTERN
- LEVEL: 11 dBm
- FREQ:
Test frequencies for subharmonics
1250 MHz, 1500 MHz, 1800 MHz (frequency double)
1830 MHz, 2100 MHz, 2199 MHz, 2400 MHz (frequency triple)
2660 MHz, 3200 MHz (frequency quadruple)
Settings on the test receiver - R
eference level = test level +3 dB, 10 dB/div
- C
enter frequency = test frequency
- SPAN = 100 kHz
- Resolution bandwidth = 1 kHz
- Switch on average: 5 samples
- Center frequency = test frequency * 1/2, * 3/2 (frequency double)
- Center frequency = test frequency * 1/3, * 2/3, * 4/3 (frequency triple)
- Center frequency = test frequency * 1/4, * 1/2, * 3/4, * 5/4 (frequency
quadruple)
Measurement First measure the level of the ground wave as reference, then
measure the level at any visible subharmonic.
Analysis The spurious suppression ratio is the difference in level between the
detected spurious referenced to the output signal from the R&S SML /
R&S SMV03 (in dBc = referenced to the carrier).
Note: The spectrum analyzer setting values are reference values and are dependent on the
analyzer used. The necessary measurement distance must be verified before every
measurement.
SSB phase noise
Test setup Test setup 3, spectrum analyzer mode
Settings on R&S SML /
R&S SMV03
- UTILITIES REF OSC SOURCE EXTERN
- LEVEL: 5.1 dBm (or level according to mixer specification)
- FREQ: 1 GHz (or any measurement frequency > 200 MHz)
Measurement principle The two test transmitters are set to the measurement frequency and
synchronized with 90° phase offset (phase quadrature). The RF carrier is
suppressed by mixing at 0 Hz, and the mixer makes use of the phase
quadrature in order to deliver a voltage corresponding to the phase -
difference between the input signals. This voltage is measured by the
spectrum analyzer and can be converted into SSB phase noise.
Measurement Set the level of each test transmitter according to the specifications of
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