C7 in CA

Hey, thanks Cooperman. Same to you and yours.

Most users ever online was 145 on Mon Dec 13, 2004 6:57 am

WoW! Something tells me this was a glitch... Or the site was featured on Slashdot or something?

A 1.2 Ghz at 5 watts, is that going to be enough to cover about a quarter of a mile? They state 3000 to 4000 ft but I'm wondering how true that would be.

I'm no wireless expert, but I have a few successful 2.4Ghz point-to-point and point-to-multipoint installs out there.

Your success depends on radio line-of-sight and possible interference sources nearby. But I'll tell you what... 1.2Ghz at 5 watts is smokin' hot! I have seen 2.4Ghz links go out 10 miles using 100mW radios. If you are trying to get that signal through a block constructed building you may have problems, but if you are trying to burn though some moderate foliage without other radio interference my guess is it would work. And if you have true radio line-of-sight 5 Watts might be too hot for those distances.

I would be careful. That wattage at those frequencies is probably dangerous. I wouldn't stand if front of the antenna too long.

Thanks Larry. keep up the good work!

Did you just add the author_search link into the post count? I don't remember seeing that until today.

Associated Press

 

VILLACH, Austria -- Someone was stealing cash from a shop, but thanks to a videocamera, authorities got their man - and it was a mouse.

 

A security camera set up inside the shop in Villach in the southwestern Austrian province of Carinthia helped the owner figure out who was making off with bank notes from the cash register. It turned out to be a mouse looking for nesting material, officials said Monday.

 

The critter was caught on camera with its paw in the till, Austrian television reported.

 

The shop owner, whose name was not released, became suspicious after a few bills worth $65 went missing.

http://www.startribune.com/stories/484/5109195.html

this is the one i use, and as Far as I know, it is not discontinued though I would have to check and may know by tomorrow hopefully - the product has a good history.

 

http://www.spytown.com/cvc-325wps.html

 

The 627 is not an alternative. It is only 350TVL, it is color, and it is cheap color, meaning it will look like its cheap. When it comes to color, well you know. Anyway, you can get a similar model to that, same image quality etc, for like $60 from eclipse .... its all the same OEM stuff, cant get my hands on something like the CVC-325 anywhere else though, at least not yet.

 

ask them if they have the 320 or 321, same cameras, I think, just not sunshield, and they have longer cables.

 

If your going to get the 627, may as save the money and get the $80 CVC-130R BW bullet, at least it will be a little crsiper of an image! I dont know about you, but I hate looking at crappy color images ... ;-0

Ok. I ordered this:

http://www.spytown.com/specprovcvse.html Is the difference between these two cameras cosmetic?

I'll check out the 320 and 321 thanks!

C7 in CA,

 

A photographer .... yippeeeee.

 

Sorry about that, the stiff upper lip slipped a bit then!

 

Well I could hardly be called a photographer. I just learned alittle bit about it.

Well, now they are saying the cvc325 is discontinued. She suggests the cvc627 as an alternative. I don't think I will be happy with the resolution though. What would I lose going from 420lines to 350? I mean, I don't expect to catch license plate numbers with a 3.6mm lens anyway. But what kind of detail am I losing in those 70 lines?

Best bet is to get an auto iris varifocal lens. Here is a link to show you a typical type to consider.

 

http://www.vitekcctv.com/ProductDetails.asp?ProductID=61

 

Here is another link to a very good resource to find information.

 

http://www.vsscctv.com/dealtools.asp

Thanks for the additional resources! looks good. What camera would you suggest for that lens? Again considering this setup would probably be mounted to a Pan/Tilt unit in the near future.

Thanks.

If you still have issues let us know, dont know what area you are in but im sure someone here or myself can point you to a distributor that stocks them, the ones in Miami I use have them in stock.

 

Rory

Ok, thanks. I am sure it was just some fluke. I'll give them the benefit of the doubt and see what happens over the next few days.

I'm in Northern California btw.

cable is short on the regular version, but there is another version that has a longer cable.

 

you can use a RCA-BNC adaptor for video, and splice the power cable and use a barrier/terminal strip to join together, for example, or whatever you normally do in a case like that. I like to put up electric gang boxes and join it all in there, so its easy to get at in the future, instead of climbing back up in the corner of the attic...

Thanks for the info. Sounds like a plan. I'll have some time tomorrow to rough-in the cable while I wait for them to be delivered. I think they screwed something up. After 10 days I had to call for statis on the order. Sounded like they couldn't find my order. And then all of a sudden it just so happens I called on the day they were being drop shipped from some warehouse or something. She was real nice though. Hopfully she upgraded the shipping for me!

AVCONSULTING, thanks for the link. That is a great resource.

 

Have you bought any cameras yet, or do you need some advice from others experienced in the North American market? Maybe if you haven't, you could give an indication of how much you want to spend, and then others will be able to advise.

 

Hope the lens stuff makes sense.

Yes. Thanks! I think it will come back to me. I kinda knew this stuff back in highschool. Well, as it pertains to 35mm SLR's. Thanks for the refresher. One thing I gotta say, focal length will take some getting use to. 50mm lens on 35mm film is incredibly different then 50mm on a 1/3" CCD.

Yes, I am looking for advice. I don't know how much I want to spend. I have to consider the camera probably will not be in that tree forever. So I may want to look at a camera I could put on a pan/tilt motor in the near future.

my line starts with their CVC-325 $137 BW Bullet Camera with IR.

I have a couple of these ordered. I figure I'll try pointing one at the front door and one out where I park the work truck. I am hoping these will feed into My RF Modulator so that I can simply distribute the signal to the televisions. Now I think I read somewhere that the cameras actually have a pretty long cable attached. Is this true? And is it a good cable? My runs aren't long at all, but I wanted to use some of this RG59/18-2 that I have had laying around here. That spool of cable is what got me thinking about cctv

Hi all. I am a low voltage contractor in California but new to cctv. For fun and education I am going to play with a couple of cameras around the house. I think I can figure out the voltage drop,cabling techniques and all that. But how do I calculate depth of field and all those other measurements?

What I am trying to cover is a T shaped intersection. The center of attention is from 135 feet out to 160 feet. At 160 ft the width to cover is about 50 ft. The camera would be mounted about 15-17 ft. high in a big'ol oak tree.

Street lighting is decent with what I think are sodium vapor bulbs? (yellow light) The sun will always be behind the camera. Resolution: the better the better. I would like to at least distinguish vehicle type. Color would be cool, but I think I am more interested in night time usability.

Any tips and industry terminology you could pass along on the subject would be appreciated.

Thanks.

I watched Terminal with Tom Hanks today. It had a few cctv scenes in it. And actually it had a good PTZ scene.

Does anyone else know of any good cctv scenes in other movies?

Not trying to step on toes...here in the US there is the FCC regulating frequencies and all wireless broadcasts. But, by adding a high gain antenna, in regards to wifi equipment, isn't altering the GHZ range the wireless equipment is working on. It all works on a specific portion of the 2.4 GHZ range. You can add a 20,000 foot antenna with powered amps and lightening grounders on it...it is still only broadcasting on 2.4 GHZ and within its dedicated range.

Actually, the way I understand it there are very specific limitations on transmit power in the USA.

1watt EIRP (equivalent isotropically radiated power) for omnidirectional antennas and 4watts EIRP for directional antennas.