[time-nuts] Distribution amplifier for 10MHz and 1 pps

[Bob kb8tq]

Hi

If you dig into the archives there are a lot of approaches to this. A few options:

1) Use an eBay video distribution amplifier

2) Use an amp (possibly MiniCircuits) and drive a power splitter

3) Use one of the (again eBay) boxes specifically designed to do this

4) Wire up a DIY board with high speed op-amps

5) Wire up a DIY board with inverters and output filters 

Again that’s just a small selection of what people have tried with success.

Bob

> On Mar 16, 2019, at 2:01 PM, Taka Kamiya via time-nuts <time-nuts at lists.febo.com> wrote:
> 
> Hello....
> I am thinking about distribution amplifier of a sort.  Not a kind with 8 or more output but just 2 or 3.  
> 
> As you know, most timing equipment comes with just one output of a kind.  Say one 10MHz and 1 PPS.  This is rather inconvenient. If I want to scope it without disturbing the setup, I cannot.  On my home brew Rb setup, I made sure I am going to put in 2 of each.
> 1 pps was easy.  Use 74HC04N.  Signal comes into a register and to one inverter.  Output of this inverter goes to all input of channel amplifiers.  Each channel consists of parallel inverters with output going to resisters, then tied together. Works well.  (amplifier meaning NOT gate)
> 
> But how do I do this on 10MHz side?  I'd like to have minimal distortion (sine wave) and high isolation.  I acquired a few signal splitter and monolithic amplifiers.  Split first and amplify?  Amplify first and split?  Remember it's only 2 to 3 channels.  Amplifier module has too much gain, so I'll probably have to use attenuators.
> 
> Have anyone run into this kind of thing?  Is there an existing design?  Anything anyone would like to share?
> 
> --------------------------------------- 
> (Mr.) Taka Kamiya
> I'm stuck in a wormhole....  Hello, worms!
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