Examples
A weak signal with signal strength of S2 corresponds to received power of -115 dBm or 0.40 microvolts in 50 ohms on HF.
A strong signal with signal strength of S8 corresponds to received power of -79 dBm or 25 microvolts in 50 ohms on HF.
Some signal generators are calibrated in dB above 1uV and have an output in emf. For example to set an HF receiver's S-reading to S9 set the signal generator output to 34 dB above 1uV
| S-reading | HF | Signal Generator emf | |
|---|---|---|---|
| μV (50Ω) | dBm | dB above 1uV | |
| S9+10dB | 160.0 | -63 | 44 |
| S9 | 50.2 | -73 | 34 |
| S8 | 25.1 | -79 | 28 |
| S7 | 12.6 | -85 | 22 |
| S6 | 6.3 | -91 | 16 |
| S5 | 3.2 | -97 | 10 |
| S4 | 1.6 | -103 | 4 |
| S3 | 0.8 | -109 | -2 |
| S2 | 0.4 | -115 | -8 |
| S1 | 0.2 | -121 | -14 |
Read more about this topic: S Meter
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