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10 Commandments of Proper Cable Termination
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| scorpion |
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Posts: 2390
Joined: 26 Mar 2007
Location: Melbourne Florida
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Posted: Sat May 24, 2008 8:39 pm
Post subject: 10 Commandments of Proper Cable Termination
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http://www.ikegami.com/cb/products/pdf/tech/proper.pdf
THE “TEN COMMANDMENTS” FOR PROPER CABLE TERMINATION
1. THOU SHALT NOT KILL THE SIGNAL BY INSTALLING MORE THAN ONE TERMINATION ON THE LINE.
2. THOU SHALT NOT STEAL THE SIGNALS BY SPLITTING OR MAKING “T” CONNECTIONS TO ANOTHER CABLE SINCE PROPER TERMINATION IS NO LONGER POSSIBLE.
3. THOU SHALT NOT FORGET TO TERMINATE EACH VIDEO SOURCE AT THE EXTREME END OF ITS COAX CABLE.
4. HONOR THY CABLE AND KEEP IT FREE OF SHARP BENDS, KINKS AND POORLY MADE CONNECTIONS OR SPLICES.
5. THOU SHALT NOT, ON MONITORS OR OTHER LOOPING INPUTS, HAVE THE HI-Z/75 OHM SWITCH IN THE
“75 OHM” POSITION IF THOU HAS A CABLE CONNECTED TO BOTH INPUTS.
6. THOU SHALT NOT, ON MONITORS OR OTHER LOOPING INPUTS, HAVE THE HI-Z/75 OHM SWITCH N THE “HI-Z” POSITION IF ONLY ONE INPUT HAS A CABLE CONNECTED, UNLESS A 75 OHM TERMINATION SHALL BE ALREADY INSTALLED ON THE OTHER INPUT.
7. THOU SHOULD NEVER SEE A READING OF LESS THAN 75 OHMS NOR GREATER THAN 200 OHMS WHEN
READING FROM THE SOURCE END IN A PROPERLY TERMINATED SYSTEM.
8. IF POWER TO A DEVICE IS REMOVED AND ITS OUTPUT GOES DEAD, THAT OUTPUT SHALL BE TREATED AS A BRAND NEW VIDEO SOURCE.
9. THOU SHALT NOT ALLOW THY COAX SHIELD TO TOUCH GROUND ANYWHERE EXCEPT WHERE THOU CONNECT IT.
10. THOU SHALT NOT VIOLATE THESE COMMANDMENTS LEST THY SIGNAL COME BACK TO HAUNT THEE (GHOSTS).
_________________
Scorpion
http://scorpiontheater.com/troubleshooting.aspx
http://scorpiontheater.com/nubix4st.aspx
QUESTION: Why is there always enough time to go back and fix it right a second time??
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| C7 in CA |
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Posts: 687
Joined: 21 Nov 2004
Location: Nor*Cal
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Posted: Sun May 25, 2008 9:07 am
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| 8. IF POWER TO A DEVICE IS REMOVED AND ITS OUTPUT GOES DEAD, THAT OUTPUT SHALL BE TREATED AS A BRAND NEW VIDEO SOURCE. |
What do they mean by that?
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Scott
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| scorpion |
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Posts: 2390
Joined: 26 Mar 2007
Location: Melbourne Florida
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Posted: Sun May 25, 2008 9:19 am
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Yes, the blackness on your monitor that just popped up is now a new video source.
You got me??
I do not think it would change the settings of any equipment on a loop through circuit!
Why would you remove power from a device other than product failure, or temp maintentance?
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Scorpion
http://scorpiontheater.com/troubleshooting.aspx
http://scorpiontheater.com/nubix4st.aspx
QUESTION: Why is there always enough time to go back and fix it right a second time??
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| C7 in CA |
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Posts: 687
Joined: 21 Nov 2004
Location: Nor*Cal
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Posted: Sun May 25, 2008 9:30 am
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Ah, gotcha.
But when I lose a video source I get video loss splash screens. Is it recording a black screen at 30fps (or whatever setting are in place) or do DVR's typically disable that channel?
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Scott
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| scorpion |
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Posts: 2390
Joined: 26 Mar 2007
Location: Melbourne Florida
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Posted: Sun May 25, 2008 10:09 am
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The AVTech does not record the dead channels with motion detection.
With motion detection it is only recording what is active.
I do not record 24/7, so I have never paid much attention to whether it would record at 30 fps of dead channels that are checked to be on, or not. Good question though.
It would only pay attention to the channels that are checked to be on, and it would ignore the other channels that are unchecked.
When I am testing DVRs before they go out to the customer you can see the playback of a quad with just one camera in view, then you will see another view pop on, and so forth until you see all cams in view.
Then you get to watch me flap my arms like a bird trying to activate the motion detection. So that I know which sequence of "footage" that I am dealing with I have to do a different action each time. I will have my arms straight out, then I will have my elbows bent to my Rolling Stones Impression of a chicken, then it will be just a hand flutter.
I learned along time ago to erase the hard drive prior to customers getting the DVRs as I would be embarrassed when they would see my motion detection tests!!!
As the airline say "Want to go somewhere"?
_________________
Scorpion
http://scorpiontheater.com/troubleshooting.aspx
http://scorpiontheater.com/nubix4st.aspx
QUESTION: Why is there always enough time to go back and fix it right a second time??
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| alanjh1965 |
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Posts: 84
Joined: 03 Nov 2005
Location: London
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Posted: Thu May 29, 2008 10:18 am
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The thought of you in my head running around like a bird conjures up all sorts of images.....
I hope your wife knows about your animal impressions 
Have you tried the crawling around on all fours to create motion detection by Cat ? 
AL
Last edited by alanjh1965 on Thu May 29, 2008 4:29 pm; edited 1 time in total
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| scorpion |
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Posts: 2390
Joined: 26 Mar 2007
Location: Melbourne Florida
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Posted: Thu May 29, 2008 3:51 pm
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| RickA |
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Posts: 611
Joined: 28 Sep 2007
Location: Kentucky
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Posted: Thu May 29, 2008 4:11 pm
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Ooops, sorry already cc'd her with the info. 
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Pegasus CCTV Tech support Rick www.pegasuscctv.com
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| scorpion |
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Posts: 2390
Joined: 26 Mar 2007
Location: Melbourne Florida
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Posted: Thu May 29, 2008 4:44 pm
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| RickA |
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Posts: 611
Joined: 28 Sep 2007
Location: Kentucky
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Posted: Thu May 29, 2008 5:12 pm
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Darn, how did you know I sent the video... must have been the size of the files, absolutely beautiful today. Sunshine and warm temps, How's Florida?
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Pegasus CCTV Tech support Rick www.pegasuscctv.com
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| scorpion |
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Posts: 2390
Joined: 26 Mar 2007
Location: Melbourne Florida
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Posted: Thu May 29, 2008 6:29 pm
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| cocacola |
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Posts: 120
Joined: 12 Feb 2008
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Posted: Sun Jun 01, 2008 9:06 pm
Post subject: Re: 10 Commandments of Proper Cable Termination
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| scorpion wrote: |
http://www.ikegami.com/cb/products/pdf/tech/proper.pdf
THE “TEN COMMANDMENTS” FOR PROPER CABLE TERMINATION
1. THOU SHALT NOT KILL THE SIGNAL BY INSTALLING MORE THAN ONE TERMINATION ON THE LINE.
2. THOU SHALT NOT STEAL THE SIGNALS BY SPLITTING OR MAKING “T” CONNECTIONS TO ANOTHER CABLE SINCE PROPER TERMINATION IS NO LONGER POSSIBLE.
3. THOU SHALT NOT FORGET TO TERMINATE EACH VIDEO SOURCE AT THE EXTREME END OF ITS COAX CABLE.
4. HONOR THY CABLE AND KEEP IT FREE OF SHARP BENDS, KINKS AND POORLY MADE CONNECTIONS OR SPLICES.
5. THOU SHALT NOT, ON MONITORS OR OTHER LOOPING INPUTS, HAVE THE HI-Z/75 OHM SWITCH IN THE
“75 OHM” POSITION IF THOU HAS A CABLE CONNECTED TO BOTH INPUTS.
6. THOU SHALT NOT, ON MONITORS OR OTHER LOOPING INPUTS, HAVE THE HI-Z/75 OHM SWITCH N THE “HI-Z” POSITION IF ONLY ONE INPUT HAS A CABLE CONNECTED, UNLESS A 75 OHM TERMINATION SHALL BE ALREADY INSTALLED ON THE OTHER INPUT.
7. THOU SHOULD NEVER SEE A READING OF LESS THAN 75 OHMS NOR GREATER THAN 200 OHMS WHEN
READING FROM THE SOURCE END IN A PROPERLY TERMINATED SYSTEM.
8. IF POWER TO A DEVICE IS REMOVED AND ITS OUTPUT GOES DEAD, THAT OUTPUT SHALL BE TREATED AS A BRAND NEW VIDEO SOURCE.
9. THOU SHALT NOT ALLOW THY COAX SHIELD TO TOUCH GROUND ANYWHERE EXCEPT WHERE THOU CONNECT IT.
10. THOU SHALT NOT VIOLATE THESE COMMANDMENTS LEST THY SIGNAL COME BACK TO HAUNT THEE (GHOSTS). |
Great info!
Only rull 8 i do not get.
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GPS and GSM Jammers: http://stores.ebay.com/Zeta-0049
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| gf1966 |
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Posts: 11
Joined: 21 Jul 2008
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Posted: Tue Jul 22, 2008 1:24 am
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same here. please explain.
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| RickA |
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Posts: 611
Joined: 28 Sep 2007
Location: Kentucky
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Posted: Tue Jul 22, 2008 8:20 am
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Is this one of those entries where you post please return to the top of the page and reread?
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Pegasus CCTV Tech support Rick www.pegasuscctv.com
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| Jim Barrett |
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Posts: 5
Joined: 15 Jul 2008
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Posted: Mon Aug 25, 2008 5:42 pm
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So, don't most compression formats register & record the initial image & then achive compression by recrding only when that image changes? I thought I understood that that was the way it worked (correct me if I'm wrong). If that is the case it seems the memory involved in recording that blank picture would be pretty small
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