Hi folks,
I designed a simple high pass filter on elsie. Would be possible to use it
according to the diagram in the link below?
http://i.troll.ws/02723e5c.png
Here is the plot for this circuit, it has near zero loss at 1.5MHz and
greater than 120db loss at 60hz:
http://i.troll.ws/a817a7a5.png
Thank you,
Felipe
Felipe Ceglia - PY1NB
-------------------------------------------------------------------------------------
PR1T team member /// Rio DX Group member /// Araucaria DX Group member
http://dxwatch.com /// http://reversebeacon.net /// http://riodxgroup.com
On Tue, Jan 14, 2014 at 10:27 PM, PY1NB - Felipe Ceglia <
felipeceglia2@gmail.com> wrote:
> Hello folks,
>
> I need to inject AC or DC into a run of CATV hardline (.860)
>
> I've been told by a CATV technician that it isnt a good idea to inject DC
> into it, he couldn't explain why. He mentioned seeing molten cables when
> someone tried to do it.
>
> I got a pair of AC injection boxes, but when measured on the VNA each of
> them presents more than 35dB insertion loss on 1.5MHz...
>
> Do you guys have any expertise on this issue? If AC is really needed, any
> particular diagram? 60hz seems to be fairly close to 1.5MHz to isolate it
> using a single capacitor as done with DC. Maybe a highpass filter should
> help?
>
> 73,
>
> Felipe Ceglia - PY1NB
>
> -------------------------------------------------------------------------------------
> PR1T team member /// Rio DX Group member /// Araucaria DX Group member
> http://dxwatch.com /// http://reversebeacon.net /// http://riodxgroup.com
>
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