first installation questions

[richiemiami 0]

I'm installing a 4th camera on a existing cctv setup

I have a few questions:

 

The distance between the dvr and camera location is about 150 feet is that fine with rg59?

 

The camera that I'm using for this installation has audio output is rg59 the standard transport for this type of signal and is there any loss with 150 feet of cable?

 

Lastly if I use siameese rg59 for video and power what type of power supply voltage would i need to start off with to get 12volts and 150 ma 150 feet away on rg59?

 

thanks for all help in advance

 

richie

[C7 in CA 0]

You will have practically no voltage drop at those distances. So a 12v power supply should work just fine.

[scorpion 0]

The camera that I'm using for this installation has audio output. Is rg59 the standard transport for this type of signal and is there any loss with 150 feet of cable?

 

You can use the RG59 for audio. Loss will depend on what kind of camera, or should I say what kind of microphone, and support electronics that go with it. If it has a built in preamplifier then you should be good to go. If it does not have a preamplifier then you can hook it up, and test it. If it works then you are good to go, if it does not then you will have to add a preamplifier from the wire to what ever you are hooking the audio up to, which I assume will be the DVR.

 

If you are an installer then it would be worth it to get a crimping tool for compression fittings. You can get an RG59 RCA compression fitting to put on the wire then it will plug right in to an RCA input. You can crimp/twist/compress an BNC connector then you can use an adapter such as this:

 

http://eclipsecctv.com/ECL-1010_connector.html

 

 

 

4-Channel Stereo Microphone Mixer

 

http://www.radioshack.com/product/index.jsp?productId=2102920&cp=&sr=1&origkw=microphones+amplifiers&kw=microphones+amplifiers&parentPage=search

 

 

 

This can be used for PCs

 

http://www.radioshack.com/product/index.jsp?productId=2548721&cp=&pg=6&sr=1&origkw=microphones&kw=microphones&parentPage=search

 

 

 

Here is a portable tester for audio

 

http://www.radioshack.com/product/index.jsp?productId=2062620&cp=&sr=1&origkw=microphones+amplifiers&kw=microphones+amplifiers&parentPage=search

[richiemiami 0]

thanks for the help guys

 

I did the wiring today and tomorrow I will put in the camera/microphone and see how it works

 

I will use an f-connector to rca at the camera end and twist on bnc for the pvr end

 

I assume the center of the rca for the microphone to be possitive?

 

thanks for the help

 

richie

[richiemiami 0]

one last question

 

with the preamp do I have to put it by the microphone?

 

for the picture that you posted shows a computer one meaning that it could be used on the pvr end

 

thanks

 

richie

[scorpion 0]

I assume the center of the rca for the microphone to be possitive?

 

Yes.

 

with the preamp do I have to put it by the microphone?

 

Too many variables to answer that question. For short runs it may not matter.

 

For long wire runs the signal may not be strong enough to travel far, and the preamp may help getting the signal there.

 

Test it at both ends, and hear what the results are.

 

You will have to send power to where the mic is if you put the preamp at the mic.

 

I use these:

http://eclipsecctv.com/ECL-MIC_microphone_1.html

 

I have to run a wire for the 12 volts, and a wire for the audio. This has a built in preamp.

 

 

****************WARNING:***************

check with your local laws BEFORE you do audio!

 

 

 

Click on these links at http://www.rcfp.org/taping/

 

Introduction

State-by-state guide

Tape-recording laws at a glance

Consent and its limits

Interstate phone calls

Possession and publication

The FCC’s role

Cellular & cordless calls

Citations to cases in articles

[richiemiami 0]

I'm wondering if i could test by simply pluging the audio mic rca into the tv where the pvr is

 

I'm not certain how the pvr works if it has to be on one particular camera for the microphone to work?

 

I would think if it's in a 4 way split screen than audio wouldn't be on?

 

I want to use this setup with a slingbox so maybe the microphone with built in preamp is the ticket and I could use it simply as the audio input on the slingbox along with the 4 up screen of the security camera

 

I know what you're thinking I should just use the network interface but the owners want the convience of use the slingbox to control tivo, cable, and security

 

btw I'm using one of those convert motion detector spy cameras for this application

 

again thanks for the help it's been very helpful

 

richie

[richiemiami 0]

On that powered microphone you posted:

 

How far should it be able to go on a rg59 siamese wire?

100-150 feet?

 

richie

[scorpion 0]

It would depend on the environment, but yes it should travel that.

 

If you are really serious about doing audio, which I am trying to deter you as much as I can, then you really need to do a lot of research, and testing before you do the installation.

 

Here is what you are going to find. When you listen to the audio it is going to sound like a microphone in a school cafeteria. Have you ever heard audio in a cafeteria, or a restaurant?

 

Outside recording is real difficult. Inside recording can be done by using shotcun microphones, and using EQ to tune out highs, and lows so that you only have the freqs of the human voice. Notch filters are even better, but you are talking thousands of dollars.

 

If you only need to record in a certain location then take the microphone that I linked for example. Roll up construction paper, or paper to form a long tube the diameter of the microphone. Put the mic in to the tube at one end. Now you are eliminating side noise and concentrating in one direction.

 

There are other tricks but I will save them for my "job security". You will have to hire someone for higher needs.