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Member
Reputation: 95
UMTS900 RTWP Issue
Dears,
after activating UMTS 900 RTWP increased on existing UMTS2100 all sites, any justification !!!
Thanks
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2015-03-04 05:50 AM
# ADS
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Member
Reputation: 33
Re: UMTS900 RTWP Issue
Originally Posted by
gunpowder
Dears,
after activating UMTS 900 RTWP increased on existing UMTS2100 all sites, any justification !!!
Thanks
I think this interference froms existed GSM900.
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Member
Reputation: 113
Re: UMTS900 RTWP Issue
There are diplexers? or other elements sharing the same irradiate system?
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Member
Reputation: 95
Re: UMTS900 RTWP Issue
yes there are diplexers (Indoor site)
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Junior Member
Reputation: 13
Re: UMTS900 RTWP Issue
I think may be power consumption more than first equipments. the equipments are saturated. (you check power maximun for diplexer)
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Member
Reputation: 95
Re: UMTS900 RTWP Issue
Dear All,
Can you elaborate more how can duplexer affect UMTS2100 when existing with UMTS900
Thanks
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Re: UMTS900 RTWP Issue
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.
Add me Rep to become a Senior Member :)
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Member
Reputation: 29
Re: UMTS900 RTWP Issue
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?
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Senior Member
Reputation: 322
Re: UMTS900 RTWP Issue
Dears
I need the formula of getting RTWP in E******* oss please!
Thanks
Khaldounh
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Users Awaiting Email Confirmation
Reputation: 14
Re: UMTS900 RTWP Issue
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
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