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sauravbabu
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CCTV Specification

02/09/2015 10:00 AM

Hi,

In a CCTV system, there is 9 channel Digital Video Recorder, and a video switcher. What is the function of 9 channel digital video recorder, and a video swicher?

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JohnDG
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#1

Re: CCTV specification

02/09/2015 10:38 AM

The function of 9 channel digital video recorder is to record up to 9 channels of video (in digital format).

The function of a video switcher is to switch video signals.

All pretty straightforward, wouldn't you say?

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#2
In reply to #1

Re: CCTV specification

02/09/2015 10:47 AM

Hi,

but there are only 8 cameras in the system and nine channel DVR is kept. Does it mean, we can still add one more CCTV - so that full capacity of DVR is also used?

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JohnDG
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#3
In reply to #2

Re: CCTV specification

02/09/2015 11:09 AM

What do you think? This isn't rocket science, you know.

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ignator
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#4
In reply to #2

Re: CCTV specification

02/09/2015 12:20 PM

What does the owners manual for the DVR tell you? If there is another input, it will tell you what connector jack to use. It will also tell you if it's analog input (PAL/NTSC), 422, or ethernet. The type of connectors unused should be one clue, as well the silk screen legends should indicate channel 9 if it exists.

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dvmdsc
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#6
In reply to #2

Re: CCTV specification

02/09/2015 10:51 PM

why not starting with e.g. telling us

the make and type of DVR

(I hope you start from that, otherwise your equipment belongs in a museum)

The screen composition:

1 at the time with intervals (your switching)

This is normally only a monitor option, while still recording just as many channels (videocameras) as preferred simultaneously.

Max display: if 9 (e.g.) 3 rows and 3 columns are displayed and you still have a BNC (hopefully) input connector free with a #9, than probably a 9th camera can be connected.

However:

Most DVR's have 4, 8, 12, 16, 24, 32, 48 camera options.

Personally I have not seen a 9 channel DVR yet, but my eyes are getting bad.

Hope this helps

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lyn
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#5

Clueless

02/09/2015 4:54 PM
04/26/2012
Membership Type:


Electrical Engineering (since 04/26/2012)

You claim to be an electrical engineer.
I seriously doubt this, given your apparent level of competence.
This information, and the answers to all your other questions is available to anyone with the ambition to look for it on-line.
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Phys
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#7
In reply to #5

Re: Clueless

02/10/2015 3:41 PM

That depends on his E.E. curriculum. If he was given anything close to the purely theoretical crap I got in college, he certainly wouldn't be able to answer this. I have a piece of paper that says I am an E. E. But that really means nothing, other than I was able to guess my way through the required bulldung courses at least as well as the average engineer. What I learned on the job is why I am an E. E. Perhaps, someday, after a few years experience, he will be too.

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lyn
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#8
In reply to #7

Re: Clueless

02/10/2015 4:35 PM

Even my 9 year old could have found the answer to sauravbabu's question with a simple web search. And the source would have been more substantive than that found on an anonymous forum.

I recognize both you and JohnDG as experts in the field, but having a source document to supplant the information gleaned here would be more help to the clueless that merely providing yet another answer to yet another question.

I've been yelled at before by people who demand that I just give them the answer to their question instead of challenging them to do their own homework.

As always, you, and all the other members here can certainly choose to give these hapless posters another fish instead of forcing them to learn how to fish.
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Phys
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#9
In reply to #8

Re: Clueless

02/10/2015 4:46 PM

I have no problem with your answer - I'm just not sure he has proven himself to not be an E.E., as some schools (some rather large and seemingly prestigious ones) seem to have no need for practical thinking. So using that as a basis for determining a lack of recognition as a degree earning E. E., is perhaps groundless. Give him heck for not using his brain, but don't question the E.E. title, because his school maybe at fault there.

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lyn
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#10
In reply to #9

Re: Clueless

02/10/2015 4:47 PM

Fair enough.
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JohnDG
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#12
In reply to #9

Re: Clueless

02/10/2015 6:25 PM

A "school" that could turn out someone with such an abysmal level of knowledge (or "thinkability") and give them a qualification does not deserve to be called an educational establishment (IMHO).

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Phys
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#13
In reply to #12

Re: Clueless

02/11/2015 8:09 AM

Well - I remember my first engineering job, and with the high level of theory and no practical hands on experience or knowledge, I'm sure my first employer thought exactly the same thing about me. Don't know about now, but in the early 1970's, engineers came out of the school I attended very short of useful knowledge, and we didn't have the internet then to help.

I seriously doubt any E.E. course addresses the issue here, but yes, this is also a case of not using the "old bean".

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JohnDG
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#11
In reply to #8

Re: Clueless

02/10/2015 6:16 PM

My first post was more-or-less echoing his guestion. My second tried to make him think (tho' I admit I am guilty of spoon-feeding).

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ZakariaSalim10
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#14

Re: CCTV Specification

02/11/2015 10:32 PM

you have to check this link:

https://www.google.com/search?client=opera&q=In+a+CCTV+system%2C+there+is+9+channel+Digital+Video+Recorder%2C+and+a+video+switcher.+What+is+the+function+of+9+channel+digital+video+recorder%2C+and+a+video+swicher%3F&sourceid=opera&ie=UTF-8&oe=UTF-8#q=In+a+CCTV+system%2C+there+is+9+channel+Digital+Video+Recorder%2C+and+a+video+switcher.+What+is+the+function+of+9+channel+digital+video+recorder%2C+and+a+video+switcher%3F&spell=1
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