Penulis Topik: 1 GHz Counter from pira  (Dibaca 8245 kali)

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Offline Sinur

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1 GHz Counter from pira
« pada: Mei 27, 2010, 11:25:13 AM »
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  • This simple counter is useful for frequency measurements of various wireless equipments, especially transmitters, receivers and signal generators in VHF/UHF band.

    Features :
    Display range: 0,0 to 999,9 MHz, resolution 0,1 MHz
    Correct rounding, reduced blinking of last digit
    Over-range indication
    Fast measurement - short measuring period
    High input sensitivity in VHF/UHF band
    Switchable intermediate frequency offset for use with receiver

    Technical specifications :
    Supply voltage: 8-20 V
    Supply current: typ. 80 mA, max. 120 mA
    Input sensitivity: max. 10 mV in 70-1000 MHz range
    Measuring period: 0,082 sec.
    Display refresh rate: 49 Hz

    Schematic diagram :


    Parts list

    R1 - 39 k
    R2 - 1 k
    R3-R6 - 2,2 k
    R7-R14 - 220

    C1, C5, C6 - 100 n mini
    C2, C3, C4 - 1 n
    C7 - 100 u
    C8, C9 - 22 p

    IC1 - 7805
    IC2 - SAB6456 (U813BS - different pin layout, not tested, also maybe R1 value need to be changed)
    IC3 - PIC16F84A programmed + socket
    T1 - BC546B
    T2-T5 - BC556B
    D1, D2 - BAT41 (BAR19) - may be ommited
    D3 - HD-M514RD (red) or HD-M512RD (green), 4-digits multiplex driven LED display from HP, or four standard 1-digit LED displays

    X1 - 4.000 MHz crystal
    BNC input connector

    To use with a receiver as a digital scale, close the -10,7 pins.
    IC3 program download: countr.hex http://pira.cz/counter.hex
    Programmer settings: Oscillator: XT, WDT: on
    For additional changes (eg. IF frequency offset change): counter.asm http://pira.cz/counter.asm

    The SAB6456 description :
    The SAB6456 is a prescaler for UHF/VHF tuners. The circuit has an input frequency range of 70 MHz to 1 GHz, has high input sensitivity and good harmonic suppression. With lower sensitivity it's usable down to 3 MHz.
    The circuit comprises an input amplifier, a divider stage and an output stage. The divider stage may oscillate during no-signal conditions but this oscillation is suppressed when input signals are received. The voltage-edges of the output signals are slowed internally to reduce harmonics in the television intermediate frequency band.



    Kepada temen-2 yg pernah membuat frequensi counter ini, tolong disharing pengalaman dan saran nya. Soalnya aku lg coba buat. ( supaya bisa meminimalisir kesalahan dan buget tentunya  ;D )
    Salam.....
    Kutip
                                                    " Practise Makes Perfect "

    Offline RADIO-SEMPRONG

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    Re:1 GHz Counter from pira
    « Jawab #1 pada: Juli 26, 2010, 12:32:02 PM »
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  • Prescalernya tu lho.. Carinya dimana??

    Offline Sinur

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    Re:1 GHz Counter from pira
    « Jawab #2 pada: Juli 26, 2010, 12:37:39 PM »
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  • Marconi glodok siap bantu , tp harga nya...... ?? .???
    Aku mentok di PIC nya...
    Kutip
                                                    " Practise Makes Perfect "

    Offline lutfi

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    Re:1 GHz Counter from pira
    « Jawab #3 pada: Juli 26, 2010, 10:34:02 PM »
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  • PIC16F84A banyak juga di toko beng elektronik glodok !,...
    Meonggg

    Offline Sinur

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    Re:1 GHz Counter from pira
    « Jawab #4 pada: Juli 27, 2010, 12:34:01 AM »
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  • Bukan IC nya pak , tp downloader nya yg bemasalah. Gagal baca error , terus..... ..nyampe aku buat 2 buah RCD , eh ternyata com / DB 9... Mb ku rusak.... ..
    Kutip
                                                    " Practise Makes Perfect "

    Offline lutfi

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    Re:1 GHz Counter from pira
    « Jawab #5 pada: Juli 27, 2010, 02:56:48 AM »
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  • oooo dikirain..... kalo cuma MB rusak mah banyak bro pentium 3 ato 4 yg bekas masih bagus2 di harco mangga dua !,....pentium 3 dibawah 100rb an pentium 4 150rb keatas....
    Meonggg

    Offline aljero

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    Re:1 GHz Counter from pira
    « Jawab #6 pada: Juli 27, 2010, 08:05:09 AM »
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  • Prescalernya tu lho.. Carinya dimana??
    saya juga kebngungan carinya
    Menekung Narawang Ngalampah Paripolah

    Offline Sinur

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    Re:1 GHz Counter from pira
    « Jawab #7 pada: Juli 27, 2010, 08:39:26 AM »
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  • Marconi & hermes glodok siap bantu mencari.... ?.. ? Tp harga spesial. Kalo ngambil @5 pcs mungkin harga bs turun... .. he....he.. Belum tanya lg sich...
    Kutip
                                                    " Practise Makes Perfect "

    Offline RADIO-SEMPRONG

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    Re:1 GHz Counter from pira
    « Jawab #8 pada: Juli 27, 2010, 03:30:00 PM »
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  • SAB6456 di ebay kira2 USD10 blm ongkir.. Mahal tuh.. Sy pernah denger 74F112 2 biji bs dijadiin prescaler 10 ya? Ada yg pernah coba? Soalnya kalo pake ini lebih irit, lumayan kan kalo bisa dipake sampai 300mhz..

    Offline ndroe

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    Re:1 GHz Counter from pira
    « Jawab #9 pada: Juli 27, 2010, 03:48:45 PM »
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  • SAB6456 di ebay kira2 USD10 blm ongkir.. Mahal tuh.. Sy pernah denger 74F112 2 biji bs dijadiin prescaler 10 ya? Ada yg pernah coba? Soalnya kalo pake ini lebih irit, lumayan kan kalo bisa dipake sampai 300mhz..

    kalau prescalernya diganti pake lb 3500 bisa ndak ya???? ::)
    88,1 ..FM Ra' Ajeg

    Offline RADIO-SEMPRONG

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    Re:1 GHz Counter from pira
    « Jawab #10 pada: Juli 27, 2010, 07:21:15 PM »
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  • Emang lb3500 msh ada di pasaran? Kalo ga salah ic tsb devider 8..

    Offline achsan

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    Re:1 GHz Counter from pira
    « Jawab #11 pada: Oktober 23, 2010, 06:13:50 AM »
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  • sulit juga ya cari komponennya.... :-[

    Offline trisno

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    Re:1 GHz Counter from pira
    « Jawab #12 pada: Januari 23, 2011, 12:16:06 PM »
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  • saya kurang tertarik frekuensi counter dengan PIC meskipun bisa ringkas banget.
    malu bertanya berjalan-jalan

    Offline bondanpepi

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    Re:1 GHz Counter from pira
    « Jawab #13 pada: Januari 23, 2011, 01:39:43 PM »
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  • klo macem ini,.......tertarik ndak ya,..... ide1,

    Offline trisno

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    Re:1 GHz Counter from pira
    « Jawab #14 pada: Januari 23, 2011, 02:09:58 PM »
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  • lha ini swr power meter + frek counter jadi satu tambah ruwet tambah ga tertarik.klo tinggal pakai nah itu lain ai hi hi hi
      ^-^ ^-^ ^-^ ^-^ ^-^ ^-^ ^-^ ^-^
    malu bertanya berjalan-jalan

     


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