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Recent content by pedja089

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    Measuring RF and EMI

    Project was delayed. So we didn't buy anything... Thanks for your help.
  2. P

    Measuring RF and EMI

    I'm definitely disappointed with Aaronia... I hope that PSA2702USC is much better...
  3. P

    Measuring RF and EMI

    That fine for me. I can wait until they get one. I'm just preparing for next year.
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    Measuring RF and EMI

    We must pay customs fee, because we aren't in EU... I'll check everything I can, and post when finally decide what to buy. Thank for info. - - - Updated - - - I just found distributors for Aim TTi in my country. Ill contact them, and ask for presentation, for PSA2702USC(12,7GHz version). Thank...
  5. P

    Measuring RF and EMI

    I'm trying to do that... Probably I can get this bundle **broken link removed** Do you have any advice for tests? Any advice on what to look for? Thank you very much.
  6. P

    Measuring RF and EMI

    Thanks... I'm hoping to get different answer... Agilent and similar spectrum analyzer is really out of mu price range. I'm found PSA2701T in Farnell, and price is about 2000€. So, with 2 Arronia SA I get much wider frequency range for same price as PSA2701T, but did I really need it? I'm not...
  7. P

    Measuring RF and EMI

    Hi, I'm starting few project which include Rf MCU(eg RfPIC, CC430FXXX at 868MHz), and 3G GSM modems... I need test equipment for measuring RF output, from boards, and antennas, and EMI for preliminary test for CE/EMC/etc... Can some one recommend me some test equipment? I found couple...
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    [sim548c] How to give back IP, and take another in GPRS connection.

    I'm waiting about 120 sec... I tried 60s, it worked, but only with exelent signal.
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    [sim548c] How to give back IP, and take another in GPRS connection.

    AT&F Maybe is problem in firmware version, try to update firmware. I have updated the sim900, because some AT commands are not working.
  10. P

    sine-wave to square-wave

    You can use a simple comparator...
  11. P

    [sim548c] How to give back IP, and take another in GPRS connection.

    I've done a similar thing with a PIC and SIM900D I checked whether it is connected to the GPRS, with AT command "AT + CGATT?". If not connected, then I sent AT + CIPSHUT, and then AT + CSTT ="... etc.
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    [sim548c] How to give back IP, and take another in GPRS connection.

    Try this: AT+CGATT=0 ' detach from gprs, AT+CGATT=1' attach again You get this error because you have already launched a wireless application on modem. If you only need to send more stuff on the PC without changing IP addresses, try this: First time: AT+CREG=1 --> answer: ok AT+CSNS=4 -->...
  13. P

    AT commands, uart, GSM module

    Maybe the modem is already configured in some baud rate, not auto baud rate. So try different speed. Eg 2400n1, etc.
  14. P

    AT commands, uart, GSM module

    You have to use a MAX232 or similar RS232 to TTL level converter.

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