survtech

You can always install a larger format lens on a smaller format camera. Essentially, what that means is that a 1/3" camera can accept a 1/3" or a 1/2" or a 2/3", etc. lens. You should not install a smaller format lens on a larger format camera - it will give you a "tunnel effect", where the picture won't fill the entire screen. As said by others, all else being equal, a 4mm 1/3" lens should give exactly the same picture as a 4mm, 1/2" lens on a 1/4" or 1/3" camera. The sensor size is a different matter. Again, all else being equal (same circuitry and pixel count, etc.) a 1/2" sensor should work slightly better in low light since the larger pixels would wach gather more light. Remember, I said "all else being equal". If the 1/2" sensor is not the same basic design as the 1/3" sensor, all bets are off.

As are Pelco, AD and Honeywell Maxpro.

But the signal would still be IP while the BNC input of a DVR is analog. As Soundy says, most likely it will not be possible without replacing the DVR.

We approached a number of wireless manufacturers who claimed their system would work in elevator shafts. The funny thing was none of them would let us return the equipment if it didn't work. I believe that says it all!

Actually, no it's not. Coax-seal is more like a putty tape. It doesn't harden.

Check out Coax-Seal: http://www.coaxseal.com/

It will probably do fine. Most 24VAC power supplies actually put out between 28VAC and 29VAC with no load.

Two excellent manufacturers of reasonably priced RF Modulators in the U.S. are Pico Macom and Channel Vision. Channel Vision also makes "whole house" signal distribution systems.

I doubt it. Ground loops are caused by the difference in potential (voltage) between two grounds usually located some distance from each other. 10 ft. would hardly be enough distance.

Try running a camera at the end of 1000 ft. of coax spread out on the ground and tie the camera's ground connection to a good ground like a cold water pipe.

Sorry, but that is not necessarily true. While CCTV coaxial cable should be 100% copper center conductor and 95% braided copper shield, RG-59 is not the only cable that fits that specification. For one, West Penn has a number of variations on cable types that are suitable: RG179/U (W/P 825/25825/45825) "MiniMax" – 1 Conductor 25AWG Solid, 95% Bare copper braid and an overall PVC Jacket. Variations include plenum. Max. length for CCTV = 500 ft. RG59/U (W/P 815/815E/815R/4815/25815) – 1 Conductor 20AWG Solid, 95% Bare copper braid and an overall PVC Jacket. Variations include plenum, riser, outdoor and direct-burial ratings. Max. length for CCTV = 1,000 ft. RG6/U (W/P 806/806R/4806/25806) – 1 Conductor 18 AWG Solid, 95% Bare copper braid and an overall PVC Jacket. Variations include plenum, riser, outdoor and direct-burial ratings. Max. length for CCTV = 1,500 ft. RG11/U (W/P 811/4811/25811) – 1 Conductor 14 Awg. Solid Bare Copper, 95% Bare Copper Braid and PVC Jacket. Variations include plenum, riser, outdoor and direct-burial ratings. Max. length for CCTV = 3,000 ft. Note: CCTV maximum distance ratings vary on the above cables. Those are absolute maximums and under ideal conditions. Personally, I would limit runs of any type to approximately 3/4 of the listed maximum ratings. Also, bare copper braid is not required for RF, only for low frequency (CCTV) applications. Then you have CAT5/6 twisted-pair. Typical distance limits are 1,000 ft. passive-passive, 2,000 ft. active-passive (either end active) and 4,000 ft. active-active. YMMV. CCTV power is not normally sent over the coax. It can be sent on twisted-pair but distances are limited. Use a calculator such as is available here to calculate distance and wire gauge for power.

Yes. I've opened up a Pelco GIT100. It's basically an autotransformer made from very small diameter coax wrapped around an (iron?) form. It won't totally get rid of strong voltage differentials but it will minimize them. Here are the specs: Ground Loop Voltage - Maximum CMV of 10 Vp-p at 60 Hz Video Performance Characteristics - Equivalent in all respects to approximately 200 feet (60.96 m) of RG59/U coax Table A. Common Mode Rejection (CMR) Length of RG59/U ... Effective CMR at 60 Hz 200 feet (60.96 m) ... 43 dB 400 feet (121.9 m) ... 37 dB 600 feet (182.9 m) ... 33 dB 800 feet (243.8 m) ... 31 dB 1,000 feet (300.8 m) ... 29 dB I'm not even certain it would work on DC ground loops. Transformers typically only work on AC and they do mention 60 Hz. If you try one, make certain you can get a refund if it doesn't work. By the way, at least one company, Speco, makes one for UTP.

I too have my doubts that a diode would work. I suppose it would depend on whether the difference was a positive or negative voltage. You could use a "ground loop isolator" in each camera's video line but those tend to be relatively expensive.

Oh, come on! It's dirt cheap! According to one dealer, MSRP on the 16MP-PRO-C is only $15,722.36 Features ∙ 16 megapixel progressive scan CCD sensor ∙ Unsurpassed image quality ∙ 3 images per second at full resolution and 10 images per second at 4872 x 480 ∙ 65 dB true dynamic range ∙ 0.1 lux minimum illumination ∙ Lossless JPEG2000 compression ∙ 35 mm optical format ∙ Automatic exposure control and iris control ∙ Software focus control ∙ Compatible with a wide selection of Canon® EF mount lenses ∙ Power over Ethernet, 24 VAC or 12 VDC power input ∙ External I/O and RS-485 interface JPEG2000 - think of the bitrate

You have to be careful using 13.8VDC power supplies. I have seen a few cameras that don't like that high a voltage. We fried a Dallmeier camera using that type of power supply. It seems the camera wanted 12VDC +/- 5%, which would be 11.4 to 12.6 volts. I agree the design is stupid and told the manufacturer that .

The 5mm spacer is the C-CS adaptor. If you have two, you only need one. C-mount cameras can only use C-mount lenses. CS-mount cameras can use CS-mount lenses straight up or they can use C-mount lenses with the 5mm spacer. CS-mount cameras have the imager 5mm closer to the lens mount than C-mount cameras, hence the need for the 5mm spacer. If it is not used, the lens will either touch the imager (not good) or will not focus. There are also some cameras whose back-focus adjustments have enough range to accomodate either lens type.

We still have a few of those in case we have to dub something from an old evidence tape.

12VDC isolated power supplies are quite rare and 230VAC versions are rarer still. Individual supplies for each camera may be your only option.

Another reason: licensing fees. MPEG-LA sells licenses for multiple codecs and their license fee structure is complex, to say the least.

I laugh at anyone entering (or leaving) a Mini Cooper .

The only media player that might play them (but probably not) is VLC Media Player. http://www.videolan.org/vlc/

Chipsets, maybe; cameras, definitely not (at least where Sony is concerned ). Panasonic? Well yes, they are one of the best. Ikegami, Pelco, Bosch and Ganz also make excellent cameras.

No outhouses?

1.6km?

You'll probably have to use fibre. Here are a few links: http://www.fibre-options.com/cctv/index.html http://www.amgsystems.co.uk/ http://www.optelecom-nkf.com/ http://www.versitron.com/cctv_systems.html [/img]