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BNC TEE circuit considerations - RF Cafe Forums
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Xconnect
Post subject: BNC TEE circuit considerations Posted: Sat
Feb 07, 2009 10:25 am
Lieutenant
Joined: Thu Jan 08,
2009 10:27 pm
Posts: 2
Looking for circuit information on the
effects a BNC has when it splits a line into two. (source splits to
'line A' and to 'line B'. Line B is a 1M ohm scope input. Line A goes
to another scope input which is 1M as well. Is it true in this scenario
the total 'load' seen by the source is now 500K?
Top
IR
Post subject: Re: BNC TEE circuit considerationsPosted: Sat
Feb 07, 2009 4:06 pm
Site Admin
Joined: Mon Jun 27,
2005 2:02 pm
Posts: 373
Location: Germany
Hello Xconnect,
There is some information missing in your description:
There
are also other impedances involved like the impedance of the source
and the characteristic impedance of the BNC connector (and also cables?),
which have to be taken into consideration.
_________________
Best regards,
- IR
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yendori
Post subject:
Re: BNC TEE circuit considerationsPosted: Sun Feb 08, 2009 10:35 pm
General
Joined: Thu Sep 25, 2003 1:19 am
Posts:
50
Location: texarcana
At least at DC to Low Frequency it is
true you will see 500K ohms at the input of the TEE.
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nubbage
Post subject: Re: BNC TEE circuit considerationsPosted:
Tue Feb 10, 2009 4:15 am
General
Joined: Fri Feb
17, 2006 12:07 pm
Posts: 218
Location: London UK
Also, buried
in the small print of the specs for the so-called 1 megohm load device,
might be reference to the shunt capacitance. At high frequencies almost
certainly this factor will dominate the impedance calculation.
_________________
At bottom, life is all about
Sucking in
and blowing out.
Posted 11/12/2012
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