IEEE 802.15.4 subsystem
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| 1 | Same test setup as for send-20100909. Board 100908-A was modified to have |
| 2 | a 220 nH inductor in the C7 position, instead of a 0R resistor. |
| 3 | |
| 4 | Distant Local |
| 5 | --------------- --------------- --------------- |
| 6 | 100813-red 100813-orange 100908-A (with inductor) |
| 7 | |
| 8 | TX 255, -91 255, -85 |
| 9 | TX 255, -90 255, -85 |
| 10 | TX 255, -91 - |
| 11 | TX 255, -90 255, -85 |
| 12 | TX 255, -91 garbled |
| 13 | |
| 14 | - TX 255, -47 |
| 15 | - TX 255, -47 |
| 16 | - TX 255, -47 |
| 17 | - TX 255, -47 |
| 18 | garbled (-90) TX 255, -47 |
| 19 | |
| 20 | 255, -82 255, -43 TX |
| 21 | 255, -82 255, -43 TX |
| 22 | 255, -82 255, -43 TX |
| 23 | 255, -82 255, -43 TX |
| 24 | 255, -82 255, -43 TX |
| 25 | |
| 26 | Control experiment: |
| 27 | |
| 28 | 100813-red 100813-orange 100908-B (unmodified) |
| 29 | |
| 30 | TX - 255, -83 |
| 31 | TX garbled (-91) 255, -86 |
| 32 | TX - 255, -86 |
| 33 | TX garbled (-91) 255, -86 |
| 34 | TX - 255, -86 |
| 35 | |
| 36 | 255, -83 255, -43 TX |
| 37 | 255, -84 255, -43 TX |
| 38 | 255, -85 255, -43 TX |
| 39 | 255, -84 255, -43 TX |
| 40 | 255, -84 255, -43 TX |
| 41 | |
| 42 | |
| 43 | Summary |
| 44 | ------- |
| 45 | |
| 46 | Direction No inductor (1) With ind. (2) Change |
| 47 | ------------------------------- --------------- ------------ ------ |
| 48 | 100813-red -> 100813-orange 255, -87 255, -91 -4 dB |
| 49 | 100813-red -> 100908-A 255, -88 255, -85 +3 dB |
| 50 | 100908-A -> 100813-red 255, -85 255, -82 +3 dB |
| 51 | |
| 52 | 100813-red -> 100813-orange 255, -90 - ? |
| 53 | 100813-red -> 100908-B 255, -90 255, -86 +4 dB |
| 54 | 100908-B -> 100813-red 255, -87 255, -84 +3 dB |
| 55 | |
| 56 | (1) Data from send-20100909 |
| 57 | (2) Only 100908-A was modified. Changes in the measurements with |
| 58 | 100908-B show inaccuracies of the test setup. |
| 59 | |
| 60 | |
| 61 | Conclusion |
| 62 | ---------- |
| 63 | |
| 64 | The differences observed are the same for the modified 100908-A board |
| 65 | and the unmodified 100908-B board. The inductor therefore does not seem |
| 66 | to have a significant effect on transceiver performance. |
| 67 |
