UMTS900 RTWP Issue

[gunpowder]

Dears,

after activating UMTS 900 RTWP increased on existing UMTS2100 all sites, any justification !!!



Thanks

[hoangtuna]

Dears,

after activating UMTS 900 RTWP increased on existing UMTS2100 all sites, any justification !!!



Thanks

I think this interference froms existed GSM900.

[rfsupp]

There are diplexers? or other elements sharing the same irradiate system?

[gunpowder]

yes there are diplexers (Indoor site)

[aomma]

I think may be power consumption more than first equipments. the equipments are saturated. (you check power maximun for diplexer)

[gunpowder]

Dear All,

Can you elaborate more how can duplexer affect UMTS2100 when existing with UMTS900

Thanks

[tharinduwije]

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]

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]

Dears

I need the formula of getting RTWP in E******* oss please!

Thanks
Khaldounh

[perimedes]

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