High Interference in BTS 3900 GRFU

[jasan]

dear all,
we swap old huawei BTS to new BTS 3900 GRFU and causes High Interference in BTS 3900 GRFU, because the bandwidth filter 260 KHz.
Any help to avoid the interfrence.

[ranielepassos]

Here we have to use external filter because the new equipment have minor selectiveness.


Compare the selectiveness of new and old to you make sure that it will necessary buy new filters.



http://www.finetopix.com/images/icons/icon14.png

[jasan]

We need to decrease the bandwidth filter to 200 khz to aviod the interfrence. This issue not related to sensevity.

[RF engineer]

dear all,
we swap old huawei BTS to new BTS 3900 GRFU and causes High Interference in BTS 3900 GRFU, because the bandwidth filter 260 KHz.
Any help to avoid the interfrence.

Dear

This is interesting can you give us more detail about bandwidth filter .

BR

[yellowant2512]

Can you share more detail information about problem and sollution please?

[jasan]

Dear RF Engineer, I wait your solution.Dear yellowant,The bandwidth filter of bts 3900 GRFU have 260 khz, but the bandwidth of gsm carrier 200 khz so if 3 sites have seriew frequencies the bandwidth filter of bts 3900 GRFU filter 260 khz and causes interfrence with other cells.

[gunpowder]

what is the parameter controlling cabinet filter BW ?
thanks