Test Procedure SME
1038.6002.02 5.16 E-13
Measurement À Settings at the SME
- Test frequency
- Level 10 dBm, unmodulated
À Setting at the analyzer
- Test frequency
À Setting at the attenuator
- Attenuation 120 dB.
À Read the level at the analyzer and note down as a reference value.
It should be approx. -110 dBm. Select the measurement bandwidth
small enough to ensure an exact reading.
À Now repeat the measurement with the settings given in the table.
Deviation of the indication at the analyzer from the reference value,
in each case ......................................................................max. 1dB
Settings
Level at the SME Attenuation of the attenuator
10 dBm 120 dB
5 dBm 115 dB
0 dBm 110 dB
-10 dBm 100 dB
-30 dBm 80 dB
-50 dBm 60 dB
-70 dBm 40 dB
-90 dBm 20 dB
-110 dBm 0 dB
Measurement of Lowest Levels
Caution: No RF leakage of the components used is the prerequisite for a correct measurement
Test setup
À Insert a low-noise preamplifier between SME and precision
attenuator.
Measurement
À Perform a subsequent calibration with a level already measured
(-30dBm). This allows measuring levels up to the lower setting limit
of the SME.
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