Thursday, December 23, 2010

GSM ANSWERS

I am Sudhanshu Mehta. I have done Masters in Electronics and Communications. I am expert in telecom, GSM and wireless. If u have any problem then ping me I will be there to help you. Kindly see the files given to right side under tag HOME
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14 comments:

  1. UnknownDecember 23, 2010 at 7:17 AM

    hi sudhanshu .. i am new in communication feild. can u tell me call flow in GSM

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  2. Sudhanshu MehtaDecember 23, 2010 at 7:26 AM

    hello dear, it is very easy,
    see call initiates from handset. then it goes to BTS.. then from BTS it moves to BSC than from BSC to MSC... this was uplink .. for downlink , path will reverses uts direction. i:e it will be SC--> BSc-->> BTS->> handset...
    there is one more module in this diag which is generally not in the books i:e transponder.. which is in between BSC and MSC... but it is generally located at the place of msc so we do not name it

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  3. AnonymousJanuary 2, 2011 at 11:10 PM

    hi sir, here his diya .. can u tell me little about tilting of antenna ion gsm

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  4. Sudhanshu MehtaJanuary 2, 2011 at 11:15 PM

    hi diya,, there are mainly 2 types of antenna tilting.. mechanical tilting and electrical tilting... mechanical tilting is bacically deals with mechanical movement of antenna and in electrical tilting we just tilt the dipoles of antenna electrically.. with this back lobes does not lifts up. ... actully we also need back lobe practically to cover the region just back 2 the sectored antenna..
    hope u satisfied

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  5. AnonymousFebruary 22, 2011 at 9:43 PM

    hi i have read the document you provided it is really helps me to understand the basics of GSM.. thanks a lot.


    sudershan venkatraman
    kerla

    ReplyDelete
  6. UnknownFebruary 24, 2011 at 8:34 PM

    Hi sir i want to made a fm transmittr and reciver but cant understand that how much area can covered by 1w power? can u help me plzzz...

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  7. Sudhanshu MehtaFebruary 28, 2011 at 8:34 PM

    dear kaushaal see 1w power will easily cover area upto 500-700 meter. it can cover more area that depends upon direction of your antennas and your antenna losses.

    in gsm 1w or 2w power is used at max. this is according to rules of Telecom Repulatory Athority of India(TRAI). and you can see the coverage of GSM BTS. i think you got your answer

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  8. AnonymousMarch 7, 2011 at 5:00 AM

    hi sir, i wana ASK about mobile jammer ckt plz tell me about it what r the components required for it

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  9. Sudhanshu MehtaMarch 8, 2011 at 10:03 PM

    this is 1st link easy one

    http://www.mediafire.com/?710ykf05lhul035

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  10. Sudhanshu MehtaMarch 8, 2011 at 10:10 PM

    here i am uploading 2nd file regarding GSM JAMMER....

    http://www.mediafire.com/?kgdmgoo6042mb9j

    firstly go through 1st fine then this one..
    thanks
    sudhanshu mehta

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  11. Shiv GuptaApril 9, 2011 at 5:38 AM

    hi sir i am trying to made a FM transmitter and receiver. i face a problem to find their components. can you tell me any equivalent transistor of bf200b please................

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  12. Sudhanshu MehtaApril 10, 2011 at 11:36 PM

    hi shiv, see go through the circuit that i have given for FM transmitter and receiver.. there is no need of bf200b in this..

    there i am using only 1 transistor MRF947T1 which is easily available..

    i will come back to u again for this again regarding bf200b

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  13. Sudhanshu MehtaApril 10, 2011 at 11:38 PM

    see send me specification for Q point needed in that circuit..then i will suggest u the alternative

    ReplyDelete
  14. AnonymousOctober 27, 2014 at 9:42 AM

    Sir i am making mibile jammer using 555 timer., in this circuit ,mrf947t1 is used. But it is not available in market . So tell me any equivalent to mrf947t1

    ReplyDelete

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