Same test setup as for send-20100909. Board 100908-A was modified to have a 220 nH inductor in the C7 position, instead of a 0R resistor. Distant Local --------------- --------------- --------------- 100813-red 100813-orange 100908-A (with inductor) TX 255, -91 255, -85 TX 255, -90 255, -85 TX 255, -91 - TX 255, -90 255, -85 TX 255, -91 garbled - TX 255, -47 - TX 255, -47 - TX 255, -47 - TX 255, -47 garbled (-90) TX 255, -47 255, -82 255, -43 TX 255, -82 255, -43 TX 255, -82 255, -43 TX 255, -82 255, -43 TX 255, -82 255, -43 TX Control experiment: 100813-red 100813-orange 100908-B (unmodified) TX - 255, -83 TX garbled (-91) 255, -86 TX - 255, -86 TX garbled (-91) 255, -86 TX - 255, -86 255, -83 255, -43 TX 255, -84 255, -43 TX 255, -85 255, -43 TX 255, -84 255, -43 TX 255, -84 255, -43 TX Summary ------- Direction No inductor (1) With ind. (2) Change ------------------------------- --------------- ------------ ------ 100813-red -> 100813-orange 255, -87 255, -91 -4 dB 100813-red -> 100908-A 255, -88 255, -85 +3 dB 100908-A -> 100813-red 255, -85 255, -82 +3 dB 100813-red -> 100813-orange 255, -90 - ? 100813-red -> 100908-B 255, -90 255, -86 +4 dB 100908-B -> 100813-red 255, -87 255, -84 +3 dB (1) Data from send-20100909 (2) Only 100908-A was modified. Changes in the measurements with 100908-B show inaccuracies of the test setup. Conclusion ---------- The differences observed are the same for the modified 100908-A board and the unmodified 100908-B board. The inductor therefore does not seem to have a significant effect on transceiver performance.