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23rd July 2005 at 19:27 #39260victorGuest
Alexander,We are looking into finding information on Nokia BTS.Can you send us any information on any Nokia Ultra Site EDGE BTS?24th July 2005 at 23:28 #39261TachGuest
I need an IM for the Ultracell, can anyone help?29th July 2005 at 06:47 #39262tergech,Kericho ,KenyaGuest
hi all ;
I work with siemens machines can you plse tell what exactly this thing called COBA does in the BTS.
Thanks1st August 2005 at 05:24 #39263amit kumar rastogiGuest
why we use diversity.1st August 2005 at 10:00 #39264ArslanGuest
A diversity antenna system can be compared to a switch that selects
>antenna or another, never both at the same time. The radio in receive
>will continually switch between antennas listening for a valid radio
>packet. After the beginning sync of a valid packet is heard, the radio
>evaluate the sync signal of the packet, on one antenna, then switch to
>other antenna and evaluate. Then the radio will select the best
>and use only that antenna for the remaining portion of that packet.
>On transmit, the radio will select the same antenna it used the last
>it communicated to that given radio. If a packet fails, it will switch
>the other antenna and retry the packet.1st August 2005 at 10:02 #39265ArslanGuest
Im working on Nokia Ultra site EDGE BTS. If u have questions,do ask.1st August 2005 at 10:04 #39266ArslanGuest
Diversity is usually used to overcome a phenomenon called Multipath distortion.It uses two identical
>located a small distance apart, to provide coverage to the same
>Multipath interference occurs when an RF signal has more than one path
>between a receiver and a transmitter. This occurs in sites that have a
>large amount of metallic or other RF reflective surfaces.
>Just as light and sound bounce off of objects, so does RF. This means
>can be more than one path that RF takes when going from a TX to and RX
>antenna. These multiple signals combine in the RX antenna and receiver
>cause distortion of the signal.
>Multipath interference can cause the RF energy of an antenna to be
>high, but the data would be unrecoverable. Changing the type of
>and location of the antenna can eliminate multipath interference.
>One can relate this to a common occurrence in one’s car. As one pull
>a stop, one may notice static on the radio. But as one moves forward a
>inches or feet, the station starts to come in more clearly. By rolling
>forward, one moves the antenna slightly, out of the point where the
>multiple signals converge.1st August 2005 at 10:49 #39267HerbertGuest
Hi to all,
I just want to know what is the Maximum power for BTS antenna 900Mhz and 1800Mhz, with and without TMA. Also, the Range (area coverage) in Km it can cover
For Space Diversity antenna what is the required spacing. We have encounter Loss of signal when using BER for 24 Hours. What remedy can I do.
Thanks to any help4th August 2005 at 04:54 #39268k.gopalGuest
tell me where omnidirectional & unidirectional antenna are used5th August 2005 at 08:32 #39269anilGuest
what is the range of rf fequency and microwave frequency.5th August 2005 at 12:01 #39270tergechGuest
i measured some signals and i have a problem converting them from dbm to mw/cm^2.Please help.9th August 2005 at 10:02 #39271BillyGuest
Help — Please can anyone give me any info on Siemens Base stations and inform me who I can contact to obtain a copy of the Siemens LMT software !!10th August 2005 at 04:50 #39272Jordy IrawanGuest
I am with a new sub contractor for service telco infrastructure for telco operator in malaysia. I have a poor basic in this area. I am in marekting division. For example I do not know what is BTS and their functions. What items or components should include for Power Installation Rectifier & battery. What items or components should we offer if clients ask for turnkey BTS installation or MW ?
Could you give me info or anything related to this. It would be appreciated if you can send me website, study case, contact persons or papers about all this things.
Thanks for your cooperation12th August 2005 at 06:10 #39273ArslanGuest
UltraSite BTS provides high output power and high receive sensitivity 44.5 dBm (28.2 W) with bypass combiner.12th August 2005 at 06:18 #39274ArslanGuest
Mike i have mailed u a few things.do check ur mail.