RG6 coax for cameras?

[Colin R 0]

Okay I'm hoping these are not stupid questions,

I just can't find the answers anywhere else.

Or maybe I didn't try hard enough!

1 Is there any benefit in using RG6 coax as against RG59?

2 How for can you run a RG59 coax and still get good images?

3 Would RG6 work at greater distance?

4 Would I be better using Ethernet cable? If so which cat5 or cat6?

5 I need to run a camera cable about 100 meters, is this feasible?

 

Thanks in advance to anyone who can help.

[Dirk_D 0]

100 meters is easy - RG59 is good for ~800', & RG6 roughly 1500'.

[mgb 0]

Yup, you'll be fine with rg59.

Siamese rg59 will be a better choice that cat5e.

Using cat5e will require baluns and the whole deal ends up costing more than the Siamese rg59.

And many of the cheap baluns aren't worth it.

[Colin R 0]

That's great, thanks for the info guys, much appreciated.

[Farzad 0]

Let me know if there is an standard for the maximum length of RG-59 or RG-6.

[mgb 0]

Roughly 750 feet for rg59

And 1500 feet for rg6

Remember that quality cable matters.

 

Here's Pelco's info on this matter.

http://www.pelco.com/sites/global/en/sales-and-support/support-services/technical-information/video-cable.page

[ilk 0]

Roughly 750 feet for rg59

And 1500 feet for rg6

Remember that quality cable matters.

 

Here's Pelco's info on this matter.

http://www.pelco.com/sites/global/en/sales-and-support/support-services/technical-information/video-cable.page

 

I have read this information from Pelco with interest and sadly it is a simplification of cable specification.

 

DC resistance is not a main factor when considering analogue video transmission over coax, dB loss at the 5MHz point is the most important factor, a total loss of 6dB including connectors and joints is considered to be the maximum allowable.

 

In addition high frequency (HF) loss is the first to occur with longer cable runs, the high frequency component of analogue video which contains the picture detail, which is why when you speak to installers who claim to be able still get a 'picture' at 750m+ on RG59 the resulting image is lacks any detail.

 

There are ways of measuring this with specialist pattern generators and a oscilloscope, a skill that sadly they do not teach CCTV engineers anymore.

 

Ilkie

[SunnyKim 2]

Thanks, Ilk. I agree to you 100%.

[Farzad 0]

Some friends refer to Pelco website article (mentioned about Video Cable selecting) but you should know the website does not refer to any Standard in this regard. Do you know any Standard about the Maximum Video Cable Length?

 

I think what Pelco mentions in his website just an experiment not an exact and cited address.

[SunnyKim 2]

Farzad,

I tested on a cheap unbranded cable of 100 meter with DVRs for analog cameras, there have been not much trouble in capturing of video image. RG59 demands a more tighter specificaton. So would be no troubles.

[mgb 0]

Roughly 750 feet for rg59

And 1500 feet for rg6

Remember that quality cable matters.

 

Here's Pelco's info on this matter.

http://www.pelco.com/sites/global/en/sales-and-support/support-services/technical-information/video-cable.page

 

I have read this information from Pelco with interest and sadly it is a simplification of cable specification.

 

DC resistance is not a main factor when considering analogue video transmission over coax, dB loss at the 5MHz point is the most important factor, a total loss of 6dB including connectors and joints is considered to be the maximum allowable.

 

In addition high frequency (HF) loss is the first to occur with longer cable runs, the high frequency component of analogue video which contains the picture detail, which is why when you speak to installers who claim to be able still get a 'picture' at 750m+ on RG59 the resulting image is lacks any detail.

 

There are ways of measuring this with specialist pattern generators and a oscilloscope, a skill that sadly they do not teach CCTV engineers anymore.

 

Ilkie

 

that may very well be true.

this is just a general rule that I don't much find important anyway because all my commercial work is IP and my side jobs that may be analog will seldom have runs over a few hundred feet.

 

the op asked if 300 feet on rg59 would be ok and I think we all can agree that this is fully possible.

 

These numbers aren't only put out by Pelco.

 

You mention 750 meters, but I said 750 feet which is a huge difference.

 

I understand that these numbers are probably on the high side but I would like to know then what you guys think the hard line is on distances for these cables