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RF modulator evaluation board for analog input and demodulator for analog output

adam martin
Prodigy 40 points
Other Parts Discussed in Thread: TRF370417

Hello All,

So I have been looking for the easiest way of going about sending analog signals via an fiber optic cable and one of the ways is to go from analog signal to RF to fiber optic using this transmitter and receiver:

Receiver: http://www.digikey.com/product-searc...ader=search_go
Transmitter: http://www.digikey.com/product-searc...ader=search_go

However I have not found an analog to RF modulator or demodulator evaluation board or circuit that can do this. I know that RF to Fiber is how cable and internet companies send their information but I can't find any modulators / demodulators for analog signals within the 200 MHz to 5.5 GHz range. For the output I believe I can demodulate the RF signal from the Receiver with the use of NI DAQ.  Also the only requirements for the signal is to have a sampling rate >= 10 MHz and >= 12bits of precision (Cost is also an issue: <$1000). 

Any feedback and comments is greatly appreciated!

  • 0
    TI__Intellectual 960 points

    The Module you attached is Analog optical Fiber module.http://www.avagotech.com/docs/AV02-3184EN;

    It transmit the analog signal in optical Fiber.  The frequency should be depends on your input frequency, it's single End RF input, traditional Mixer is ok form your base-band signal. We also  TRF370417(50M~6Ghz) and TRF3711XX if you want to use modulator or demodulator.

    Another approach way is use a ADC sample the data, and use Serdes transmit the digital signal in optical fiber. This will be better for your signal quality and optical fiber cost. 

    Robin

  • 0 in reply to robinfeng
    Prodigy 160 points

    I agree with Robin. I also recommend you first convert signal from Electric to Optic or Vice Versa  using a transducer for this conversion and when you transmit signal in other level in payload (data level), internal clocks you made in digital should determine the output rate. I also recommend you look at the frame in fiber optic transmission systems and it may give you a good idea.