View Full Version : Question UMTS900 RTWP Issue
gunpowder
2015-03-04, 05:50 AM
Dears,
after activating UMTS 900 RTWP increased on existing UMTS2100 all sites, any justification !!!
Thanks
hoangtuna
2015-03-04, 01:25 PM
Dears,
after activating UMTS 900 RTWP increased on existing UMTS2100 all sites, any justification !!!
Thanks
I think this interference froms existed GSM900.
rfsupp
2015-03-05, 07:39 AM
There are diplexers? or other elements sharing the same irradiate system?
gunpowder
2015-03-05, 07:52 AM
yes there are diplexers (Indoor site)
aomma
2015-03-05, 01:50 PM
I think may be power consumption more than first equipments. the equipments are saturated. (you check power maximun for diplexer)
gunpowder
2015-03-05, 08:44 PM
Dear All,
Can you elaborate more how can duplexer affect UMTS2100 when existing with UMTS900
Thanks
tharinduwije
2015-03-06, 10:49 PM
if the power going through the duplexer is too much to handle then all sort of intermodulatory products & internal power reflections could occur.When troubleshooting try by passing duplexer & directly connecting to antenna using a long jumper.If it goes down duplexer is the issue.
fannakhosr
2015-03-10, 08:11 PM
Dear
what is the configuration of U900 cabinet, is it Mixed mode or Stand alone?, is there TMA co sharing?, what is the gain of this TMA?
khaldounh
2016-02-08, 05:55 PM
Dears
I need the formula of getting RTWP in E******* oss please!
Thanks
Khaldounh
perimedes
2016-02-08, 11:31 PM
Here it is:
Counter PMSUMULRSSI/PMSAMPLESULRSSI. To be found in table CELLSTATS_DELTA. The range of the value is 0-621. The formula you need to calculate the real value in dBm is: dBm = -112 + value*0.1
Two bits of information: Due to the E*** system architecture, RTWP sohuld be calculated as the minimun in very low traffic conditions. This is normally attained in the small hours of the morning. A normal (and fairly healthy value) is -104 dBm. Anything above -100 dBm should be considered wrong (But, please, do not forget is a daily minimum. It is not relevant if the counter is -80 dBm at full traffic)
Regards
vBulletin® v4.2.5, Copyright ©2000-2024, Jelsoft Enterprises Ltd.