The following data were taken from a "live" 100baseT Ethernet connection, between two computers. A moderately high impedance probe was connected to one data pair and fed to the input of an Icom IC-R8500 receiver. Carriers were measured at certain frequencies and a rough estimate of signal strength was recorded. Note that only certain frequency ranges were examined.
These are preliminary data which should be repeated under more precise conditions.
| 03/06/03 | ||
| Measurements of 100baseT Ethernet | AA6E | |
| F MHz | dB rel S9 | Comment |
| 0.10510 | 0 | |
| 0.12040 | 20 | “hum” P=9 ms |
| 0.13610 | 0 | |
| 0.16680 | 10 | |
| 0.19780 | 15 | |
| 0.21860 | -20 | Pulsed |
| 0.22780 | 6 | |
| 0.24300 | -4 | |
| 0.25900 | 10 | |
| 0.29000 | 10 | |
| 0.32000 | 20 | |
| 0.35000 | 20 | |
| 0.38100 | 5 | |
| 0.41300 | 10 | |
| 0.44400 | 0 | |
| 0.47300 | 10 | |
| 0.50200 | 10 | |
| 0.53500 | 10 | |
| 3.16000 | 10 | |
| 3.19000 | 10 | |
| 3.22100 | 0 | |
| 3.25000 | 0 | |
| 3.28100 | 5 | |
| 4.01300 | 10 | |
| 4.04500 | -4 | |
| 4.07500 | 10 | |
| 4.10600 | -8 | |
| 4.13600 | 10 | |
| 7.00900 | 0 | |
| 7.03600 | 5 | |
| 7.06700 | 10 | |
| 7.09800 | 10 | |
| 7.13000 | 0 | |
| 7.15800 | 10 | |
| 14.00000 | 10 | |
| 14.02800 | 20 | |
| 14.05900 | 0 | |
| 14.09000 | 20 | |
| 14.12100 | -8 | |
| 14.15200 | 20 | |
| 21.02200 | 5 | |
| 21.05200 | 20 | |
| 21.08200 | 0 | |
| 21.10900 | 20 | |
| 21.14200 | 0 | |
| 21.17200 | 20 | |
| 29.53900 | 0 | |
| 29.57100 | -20 | |
| 29.60100 | -4 | |
| 29.63000 | -8 | |
| 29.66100 | 5 | |
| 29.69400 | 0 | |
| 29.72400 | -12 | |
| 29.75500 | 0 | |
| 29.78400 | 5 | |
| 29.81300 | 5 | |
| 29.84100 | 5 | |
| 29.87400 | -8 | |
| 29.90500 | 10 | |
| 29.93300 | -8 | |
| 29.96500 | 10 | |
| 29.99400 | 0 | |
| 30.00400 | 10 | |
| 30.02600 | 0 | |
| 30.06000 | -8 | |
| 30.09100 | 10 | |
| 30.12000 | 5 | |
| 30.14900 | 0 | |
| 30.18200 | -4 | |
| 30.21100 | 0 | |
| 30.24300 | -24 | |
| 30.27400 | 0 | |
| 30.51800 | 10 | |
| 30.54700 | 5 | |
| 30.57900 | 20 | |
| 49.99637 | 0 | |
| 49.99943 | -8 | Clock? |
| 50.02691 | -12 | |
| 50.05745 | 0 | |
| 50.08799 | -4 | |
| 50.11851 | 0 | |
| 50.14905 | 0 | |
| 144.00637 | -12 | ?? |
| 144.03690 | -12 | |
| 144.09796 | -12 | |
| 144.12851 | -24 | |
| 144.15903 | -16 | |
| 144.18956 | -24 | |
| 220.00027 | -32 | |
| 220.03262 | -32 | |
| 220.04278 | -40 | |
| 220.06312 | -36 | |
| 220.07833 | -28 | |
| 220.09368 | -24 | |
| 440.00130 | -40 | |
| 440.08132 | -44 | |
| 440.14236 | -48 | |
| 440.23396 | -44 | |
| 440.53931 | -44 | |
| 440.66142 | -40 | |
| 440.75302 | -40 | |
| 900.00352 | -24 | |
| 905.00355 | -40 | |
| 910.00359 | -50 | |
| 915.00358 | -50 | |
| 920.00365 | -36 | |
| 925.00366 | -32 | |
| 930.00368 | -50 | |
| 935.00372 | -42 | |
| 1,200.00499 | -32 | |
| 1,202.50440 | -28 | |
| 1,205.00445 | -36 | |
| 1,800.00706 | -44 | |
| 1,874.99425 | -24 | |
| 1,999.99637 | -50 |