ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
Top Posters(30 Days)
Potseal 11
Recent Posts
600 KW 120/208 3 Phase Y protection
by Yooperup. 07/21/17 09:27 AM
1913 American Electrician's Handbook
by gfretwell. 07/20/17 01:08 PM
Green House wiring
by ghost307. 07/20/17 09:10 AM
Permit Snafus...AHJs and Contractors Jump in
by HotLine1. 07/18/17 08:06 PM
New in the Gallery:
SE cable question
Popular Topics(Views)
239,193 Are you busy
174,586 Re: Forum
167,018 Need opinion
Who's Online Now
0 registered members (), 34 guests, and 8 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate This Thread
#160402 - 11/30/05 08:02 AM Ins & Outs of splitters  
Redsy  Offline
Member
Joined: Mar 2001
Posts: 2,056
Bucks County PA
On a standard CATV splitter, does the input and output connections raelly matter, or is the splitter simply a splicing device?

Thanks,

John


Study Guides for VDV / Structured Cabling Installers

Voice, Data, Video, (VDV) Fiber Optics, Communications, Low Voltage,
Fire Alarm, Electronic Security Systems Installations & Related

NTC Low Voltage Training & NICET Exam Study Guides
Low Voltage Training & NICET Exam Study Guides


#160403 - 11/30/05 08:22 AM Re: Ins & Outs of splitters  
NJwirenut  Offline
Member
Joined: Sep 2001
Posts: 806
Bergen County, NJ
Yes, it does matter.

If you open one up, you will see that it is a transformer with one primary winding and 2 secondaries, not a simple splice box.


#160404 - 11/30/05 10:52 PM Re: Ins & Outs of splitters  
hbiss  Offline
Member
Joined: Dec 2003
Posts: 886
Hawthorne, NY USA
If it were really a transformer with one primary and two secondaries the "in" and "outs" wouldn't matter and it would indeed be a "T" or splice. Ain't no such thing.

Anyway, answer your own question. Take a 2 way splitter and connect a cable drop to an "out" and a TV to the other "out". What do you get? Now connect the TV to the "in".

So, it passes a signal from the "in" to the "outs" and vice versa but not between the "outs".

This will hold true for any splitter configuration and if you want it to work observe the in port.

-Hal


#160405 - 12/18/05 08:27 AM Re: Ins & Outs of splitters  
Trumpy  Offline


Member
Joined: Jul 2002
Posts: 8,217
SI,New Zealand
All that "transformer" does is maintains the line impedance at 75 ohms and matches the input to the output.
A standard splitter will have this in it.
The better quality ones we have here in NZ have MOV's.
Don't forget also that there is often a power-pass feature for line-powering devices, this means that a diode is often included for reverse polarity protection.


Let's face it, these days if you're not young, you're old - Red Green grin


Member Spotlight
renosteinke
renosteinke
Blue Collar Country
Posts: 5,316
Joined: January 2005
Show All Member Profiles 
Featured:

2017 NEC and Related
2017 NEC
Now Available!

Shout Box
Powered by UBB.threads™ PHP Forum Software 7.6.0
Page Time: 0.016s Queries: 14 (0.003s) Memory: 0.7636 MB (Peak: 0.8950 MB) Zlib enabled. Server Time: 2017-07-22 02:34:50 UTC