[victor]

Alexander,We are looking into finding information on Nokia BTS.Can you send us any information on any Nokia Ultra Site EDGE BTS?

[Tach]

I need an IM for the Ultracell, can anyone help?

[tergech,Kericho ,Kenya]

hi all ;
I work with siemens machines can you plse tell what exactly this thing called COBA does in the BTS.

Thanks

[amit kumar rastogi]

why we use diversity.

[Arslan]

A diversity antenna system can be compared to a switch that selects
one
>antenna or another, never both at the same time. The radio in receive
mode
>will continually switch between antennas listening for a valid radio
>packet. After the beginning sync of a valid packet is heard, the radio
will
>evaluate the sync signal of the packet, on one antenna, then switch to
the
>other antenna and evaluate. Then the radio will select the best
antenna,
>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
time
>it communicated to that given radio. If a packet fails, it will switch
to
>the other antenna and retry the packet.

[Arslan]

Im working on Nokia Ultra site EDGE BTS. If u have questions,do ask.

[Arslan]

Diversity is usually used to overcome a phenomenon called Multipath distortion.It uses two identical
antennas,
>located a small distance apart, to provide coverage to the same
physical
>area.
>
>Multipath Distortion
>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
there
>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
to
>cause distortion of the signal.
>
>Multipath interference can cause the RF energy of an antenna to be
very
>high, but the data would be unrecoverable. Changing the type of
antenna,
>and location of the antenna can eliminate multipath interference.
>
>One can relate this to a common occurrence in one’s car. As one pull
up to
>a stop, one may notice static on the radio. But as one moves forward a
few
>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.

[Herbert]

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 help

[k.gopal]

tell me where omnidirectional & unidirectional antenna are used

[anil]

what is the range of rf fequency and microwave frequency.

[tergech]

hi,
i measured some signals and i have a problem converting them from dbm to mw/cm^2.Please help.

[Billy]

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 !!

[Jordy Irawan]

Dear All,

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 cooperation

[Arslan]

UltraSite BTS provides high output power and high receive sensitivity 44.5 dBm (28.2 W) with bypass combiner.

[Arslan]

Mike i have mailed u a few things.do check ur mail.

[Author]

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