mirror of
git://projects.qi-hardware.com/ben-wpan.git
synced 2024-11-25 06:41:53 +02:00
87 lines
2.0 KiB
Plaintext
87 lines
2.0 KiB
Plaintext
Signal strength tests. "Local" devices are on lab bench, about 5 cm apart.
|
|
"Distant" device is in the adjacent room, separated by one thin brick wall
|
|
and 4 m of air.
|
|
|
|
TX is requested 0 dBm (effectively -0.2 dBm). Transmission is without
|
|
CSMA-CA and ARQ. Results are LQI and ED (dBm). "garbled" is a bad CRC and
|
|
corrupted frame content. "-" is no reception.
|
|
|
|
Distant Local
|
|
--------------- --------------- ---------------
|
|
100813-red 100813-orange 100908-B
|
|
|
|
TX 255, -90 255, -90
|
|
TX 255, -90 garbled
|
|
TX 255, -90 255, -90
|
|
TX 255, -90 255, -90
|
|
TX 255, -90 255, -90
|
|
|
|
- TX garbled
|
|
garbled TX 255, -52
|
|
255, -89 TX 255, -52
|
|
255, -89 TX 255, -53
|
|
- TX 255, -53
|
|
|
|
255, -88 255, -48 TX
|
|
255, -86 255, -46 TX
|
|
255, -86 255, -49 TX
|
|
255, -86 255, -49 TX
|
|
255, -87 255, -49 TX
|
|
|
|
100813-red 100813-orange 100908-A
|
|
|
|
TX 255, -90 garbled
|
|
TX 255, -89 180, -89
|
|
TX 255, -87 196, -89
|
|
TX 255, -87 148, -89
|
|
TX 255, -87 -
|
|
|
|
255, -86 TX garbled
|
|
255, -87 TX 255, -49
|
|
255, -86 TX 255, -49
|
|
255, -87 TX 255, -49
|
|
255, -86 TX 255, -49
|
|
|
|
- garbled (-44) TX
|
|
- - TX
|
|
- - TX
|
|
- - TX
|
|
- - TX
|
|
|
|
100813-red 100813-orange 100908-A (reworked)
|
|
|
|
TX 255, -87 255, -87
|
|
TX 255, -87 255, -88
|
|
TX 255, -87 255, -87
|
|
TX 255, -87 255, -88
|
|
TX 255, -87 255, -88
|
|
|
|
255, -86 TX 255, -56
|
|
255, -86 TX 255, -57
|
|
255, -86 TX 255, -58
|
|
255, -86 TX 255, -58
|
|
255, -86 TX 255, -58
|
|
|
|
255, -85 255, -52 TX
|
|
255, -85 255, -52 TX
|
|
255, -85 255, -52 TX
|
|
255, -86 255, -52 TX
|
|
255, -86 255, -52 TX
|
|
|
|
|
|
Conclusions
|
|
-----------
|
|
|
|
- 20100813 (atusb) and 20100908 (atusd) board show similar performance when
|
|
at least one station is an atusb
|
|
|
|
- resistive divider doesn't work
|
|
|
|
- no clear indication of whether capacitative divider causes interferences.
|
|
Marked difference in one series of tests but the others look the same.
|
|
|
|
- reception level is about 4 dB above workable minimum. (Specified receiver
|
|
sensitivity is -101 dBm, but things start to deteriorate around -90 dBm.)
|
|
We have a reserve of 3.2 dB for transmission (used -0.2 dBm, maximum is
|
|
+3.0 dBm).
|