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Dieter Spaar spaar at mirider.augusta.deOn Fri, 19 Jun 2009 10:55:16 CEST, "Dieter Spaar" <spaar at mirider.augusta.de> wrote:
>
> I will see if I find some time for measurements with the BS-11.
And here are the measurment results for the BS-11 for each of the
four power classes:
BS-11, ARFCN 123
BTS Power: 0.03 Watt
NM_ATT_RF_MAXPOWR_R RF output
0 12 dBm
1 9.7 dBm
2 7.8 dBm
4 4.7 dBm
6 0.9 dBm
BTS Power: 0.08 Watt
NM_ATT_RF_MAXPOWR_R RF output
0 17 dBm
1 15 dBm
2 13 dBm
4 8.7 dBm
6 5.5 dBm
BTS Power: 0.25 Watt
NM_ATT_RF_MAXPOWR_R RF output
0 22 dBm
1 20 dBm
2 18 dBm
4 14 dBm
6 9.9 dBm
BTS Power: 2 Watt
NM_ATT_RF_MAXPOWR_R RF output
0 32 dBm
1 30 dBm
2 27 dBm
4 23 dBm
6 19 dBm
Values larger than 6 for NM_ATT_RF_MAXPOWR_R are not supported.
There is most certainly an error in the range of 2 to 3 dB coming
from the low-quality cable and some adaptor connectors to connect
the BTS to the measurement equipment.
I did also play with the power control of the BS-11. As far as I
am aware the BTS power control is not enbabled per default in
bsc_hack, the measurement results from the BTS confirm that. If
I enable the BTS power control I can at least see that the BTS
changes the MS power. I have not verified on the phone if the
power is really changed, but the RX level of the BTS seem to
indicate that it works.
There are a lot of parameters to play with so if anyone is
interested, just reduce NM_ATT_BS11_RADIO_MEAS_GRAN (lets
say to 2) so that you see frequent measurement results and
watch what is going on.
Best regards,
Dieter
--
Dieter Spaar, Germany spaar at mirider.augusta.de