Recent content by Tom48

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    Distributing a clock signal using a clock fanout buffer

    Once again a big thank you to all of you for all the input! @Baluncore: I would like to tie the channels because i want to experiment with angle of arrival estimation. @lewando: As i said, i did not yet have access to an oscilloscope (but soon) that's why some of my statements regarding the...
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    Distributing a clock signal using a clock fanout buffer

    ok, thanks so much for all the information so far! A bit more about the project. This is the SDR i use: http://www.nooelec.com/store/sdr/sdr-receivers/nesdr-smart.html I have 4 of this SDR-devices and i would like to clock them all with the same clock signal in order to synchronize them. So i...
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    Distributing a clock signal using a clock fanout buffer

    i see... In case i don't have the option to pick another oscillator, what other options do i have? Are there clock buffers available that would work with such low input clock signals? How about this one? http://www.idt.com/document/621-datasheet Would a level shifter like this one maybe be...
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    Distributing a clock signal using a clock fanout buffer

    No i did not yet. I need an oscilloscope to do that and i need to wait some more days until i get access to one. Until then i wanted to ask regarding the clock buffer if i made an obvious mistake. A TCXO normally provides a clipped sine wave output signal. Is this buffer ok with that? As the...
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    Distributing a clock signal using a clock fanout buffer

    Hi lewando, thanks for your reply! I left the OE pin of the buffer open. Is that the fault? In the datasheet of the buffer i posted it says (on page 2): OE = Output Enable for the clock outputs. Outputs are enabled when HIGH or when left open; OE pin has internal pull−up resistor. Three−states...
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    Distributing a clock signal using a clock fanout buffer

    Hi berkman, thanks for your reply! I drive the clock buffer i posted above directly with the TCXO. Do i have to calculate the line for a 50Ohm environment? (what exactly do you mean by 'termination scheme'?) Because right now the oscillator seems to work but the clock buffer shows no reaction at...
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    Distributing a clock signal using a clock fanout buffer

    Hi Baluncore, thank you for your answer. The oscillator should provide a clipped sinewave output signal. Is the clock buffer i chose not capable of handling clipped sinewaves? I need 28.8MHz. I would like to synchronize multiple SDR-Sticks (4 SDRs at whole). Each SDR-Stick is clocked with a...
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    Distributing a clock signal using a clock fanout buffer

    hi, im trying to distribute a clock signal using a clock fanout buffer. I have an oscillator and i need to get its clock signal to 4 other devices. My first idea was to supply the clock signal of the oscillator to a clock buffer. I have chosen this clock buffer...
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    Can I Use a Frequency Synthesizer to Create a 28.8MHz Clock Signal?

    ok thank you all for all your replies! I didnt know there also were programmable oscillators available, so thanks for that hint! So i guess i just could grab one of these, e.g...
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    Can I Use a Frequency Synthesizer to Create a 28.8MHz Clock Signal?

    First, thanks a lot for your answers! It should be pretty close to 28.8MHz (TCXO/temperature compensated would be good in order to keep the frequency drift lower). (28.75 to 28.85MHZ is ok for sure) A low quality crystal on a SDR (software defined radio) stick shall be replaced. So i could...
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    Can I Use a Frequency Synthesizer to Create a 28.8MHz Clock Signal?

    hi, i need a 28.8MHz clock signal (digital/square wave). Unfortunately this specific frequency is hard to get so i need to make one myself. I guess the keyword here is "frequency synthesizer"? Or how would you approach this? (to get the 28.8MHz clock signal out of other more commonly available...
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    Split clock signal (provided by oscillator)

    thanks for your reply! Im indeed talking about devices that all have internal oscillators only. So i had to remove the internal oscillator from the device first. After i would clock multiple devices of the same kind with one shared oscillator. But i guess i first had to amplify the given clock...
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    Split clock signal (provided by oscillator)

    hi, i was wondering how its possible to split a clock signal provided by an oscillator in order to use it to drive multiple devices with this one split clock signal. Let's assume we have a kind of USB device (like an USB stick), that gets its clock signal from an oscillator. Let's say i would...
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    Antenna (Dipole) balun - what is it for?

    ok, this makes perfect sense now! Always amazed how quite complex stuff can be broken down into eezy-peezy-bits by some people. ;) Thanks a lot, now i can continue working on my antenna designs in good conscience of actually "knowing" what's going on! Thanks a bunch! :D
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    Antenna (Dipole) balun - what is it for?

    Thank you all for your input! Especially the last two posts contributed greatly to my understanding. Thank you very much! :) PS: I am just a little confused, can one of you please tell me why there has to be a 180 degree phase shift between both dipole arm feeds?
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