Ok i know this isn't quadcopter related, but it does use the same technology.

Task: Create a battery powered portable camera system that transmits long distance (1000 meter+). the transmission is received into a case with a smaller screen 7"-10". The secondary task is to be able to have 1-6 cameras that i can have transmit to the same receiver. I don't need to be viewing all of the cameras at once. Just be able to switch channels to view them. I want to be able to have good quality picture. 

Purpose: Set the cameras up down range face them towards my target (the multiple cameras at varying ranges). Then i am able to shoot the targets and be able to see the impact on the smaller screen. 

There are products out there that do this exact thing, but they run $1000. I know it is possible to build one for cheaper and i am big into DIY stuff. I unfortunately am more of a carpenter and builder than small electronic components.

I know i will need a 1.2ghz/ 1.3ghz or 2.4ghz wireless transmitter and receiver. For the multiple cameras will need extra transmitters. 

I will need battery packs for the camera and transmitter. And another battery for the screen and the receiver.

I just don't know anything about the voltage and consumption draw to get the right batteries for each of them. i would like them to be able to run for 1-4 hours. or be able to replace the battery packs easily. or even for the camera and transmitter have a small solar cell to helming keep it charged. I am also worried about the transmitter and camera overheating due to the small size of them. and they will have to be encased to prevent damage during transport or storage. The system am replicating has 4 mile line of sight range. I would love to get that kind of range but quite simply i would never use it. the most i would need to use it is 1000meters. but i don't want to be operating on the edge of its capability because i think it would get worse quality transmitting. But i have never dine anything like this and am nervous about starting to get stuff because i have no clue what i am doing, but would love to learn all i can.


i will attach pictures of the product i am trying to kind of produce to help y'all see what i am going for. i really appreciate any help y'all can give me. 

here is the link to the website:  http://www.targetcam.net/products.html


here are the specs for the camera they sell:
Standard Compact Target Spotting System Features
-Self-contained camera system
-Powder-coated weatherproof metal enclosure
-Standard ¼" tripod adapter
-Cameras are placed at a safe distance of 25' from the target
-4' to 6' field-of-view at 25' distance with 25mm lens
-Additional lenses are available for specific distance requirements
-Wireless transmitter with 6 user-adjusted channels
-4 Mile (line-of-sight) range (Auxiliary antennas available)
-2.9Ah Battery (5-6 hour life, auxiliary battery systems available)
-Eliminate time-consuming trips to long-range targets
-User-friendly - power up and see your target immediately

Here are the specs for the case and main system package:
New! Big Screen TargetCam®!

Now available, a big screen TargetCam model that offers all the features of our standard, smaller TargetCam with even greater visual clarity!

Big Screen TargetCam® Features

-Self-contained 15lb system

-Larger Pelican™ iM2300 waterproof and crush-proof case

-Storage for up to 4 cameras

-10.5" high-resolution LCD display with collapsible sunshade

-Wireless receiver with 6 user-adjusted channels

-4 Mile (line-of-sight) range

-Compartment for ammo, eye wear, and ear protection

-5Ah Battery (5-6 hour life, auxiliary battery systems available)

-No additional equipment required!

-Eliminate time-consuming trips to long-range targets

-User-friendly - power up and see your target immediately
-Cameras are placed at a safe distance of 25' from the target

Possible, so what is your question?

Sorry i forgot to post my actual questions. I was so focussed on giving all the info i could to make it easier for y'all to help but didnt ask any questions. hahah

1. What transmitter and receiver do i need to get that kind of range?
2. What kind of camera should i use to get decent quality picture?
3. What antenna would i need to be able to transmits that kind of range?
4. What kind of batteries am i going to need to be able to run them for 5-6 hours?

any input is greatly appreciated.

Also what kind of cooling system would i need to be able to make the overall life longer and not deteriorate due to overheating. for the camera and transmitter i want to use a small plastic ammo can the measurements are 9.5"x 4.25"x 6". So there is enough room to to house the batteries camera and transmitter as well as a cooling unit. The camera will be fitted into a hole that is cut through the plastic then sealed up around it.

FPV is normally on 5.8 GHz. The frequency depends on your Country...
Lower freq provides wider range.
Helical antennas can extend the range.

What frequency you can use for video transmitting depends on the regulations of the country you live in, also the max. power of the transmitters is limited.

Maybe you check that first just to make sure.

Oh i was slow typing... anyway, based on your country's regulations, it can be easy to do, or not.

for the screen i was considering something like this. overall i would like the price to come in at or under $700. i would prefer it a lot less though. but thats around where i would like to be.

http://hobbywireless.com/video-monitors-...p-881.html

i am in the US. I BELIVE THAT 2.4GHZ 5.8GHZ AND 900MHZ are legal. But i am out in the middle of no where so i don't think interference will be a huge issue. but there is one cell tower thats roughly 2-4miles away. but this is the boogie backwoods of Texas.

is it possible to get 4mile LOS range with a 5.8ghz receiver and monitor combo? I've seen some that are screens and receiver combos
something like this http://hobbywireless.com/video-monitors-...-1410.html

please describe what do you consider as good video quality, we operate on "poor" video quality in modern times so if you are looking for fullhd or 4k solution your options will be limited.
as for what you aim my understanding is as follows, multiple cameras / sources + single viewing point (maybe recording?)
to do so i would recommend checking the local regulations... and if you expect to be only one in the area go for the 600mw transmitter (something like this example: http://www.banggood.com/Eachine-TS832-FP...75425.html) as you will select the vtx think about antennas... this is related to how the system will work, if it will be static (cameras once placed will not move) think about directional antennas like helical. if they are in movement... think about cloverleaf/pagoda

the solution you want to achieve isn't complex, however you will need to take attention to details ...
if the cameras are far from you how will you know the batteries are running out of juice ?
what is the video quality you are after?
maybe you want to record if so... which camera or all?
if size is not an issue for you maybe going with 1.3 ghz will be better than 5.8 or 2.4 ?
what i would add to your system is OSD to show the battery voltage ... so you will know you are getting low on juice in advance... so you can walk and replace a battery or so.

if i understood you correctly you are to setup the camera next to target shield / object and validate hit or miss without telescope or walking to the target every time.

The lower the frequency, the less problems you will have with range or interference (at least theoretically, i only have experience with 5.8GHz). Depending on what you do, you still might draw some attention, and at least in my country, breaking radio transmission laws can lead to fines up to 10'000$. Just so you have been warned.

For the screen you linked above: Once you decided for a frequency, you could buy a screen with integrated reciever, for probably pretty much the same price. Now i don't know if this is practical, maybe it would be better to be able to place the antenna in a good spot, maybe elevated on a tri-pod or something.

Normally there's 8 channels per band. Let's say you use 6 transmitters, those channels will be close together, not sure how clean the reception would be for each single channel. But you could start small, for example buy 2 cams, 2 transmitters, 1 screen & receiver, 3 batteries. For cameras you could go as cheap as possible (CMOS), as they are used static and don't need to react to dynamic lighting. Batteries probably 2s with enough capacity. LiPos may be not optimal for this though, NiMH might be better. 7.2V should be enough to feed transmitters & cams. You can probably get some cheap ones for RC cars. 4-5Ah is pretty common for those.

@Grisha, i think OSD would be overkill. I think he should keep the system as simple as possible. Big enough batteries, done.

EDIT: Another thought, as you probably don't want the cams too close to your target, they should have a smaller FOV. 3.6mm will be better than the usual 2.8mm or 2.5mm we like for FPV flying.

@grisha0 those are excellent points. i think the OSD is a good idea if i plan to evolve it for more of a security usage around the ranch. but the initial setup i am just going to have it setup for a max of 4hours. i want to have more battery than that though just in case.

@fftunes it is my understanding that there are hobbyist frequencies that are used on 1.2ghz frequency. i actually reached out to the owner of the cam target system and asked him a bunch of questions about frequency. he says they primarily use 2.4ghz and 1.2ghz. so i asked about federal law and all that and he said they use the hobbyist channels on those frequencies. this was his exact words. "We build systems using either 1.2 Ghtz or 2.4 Ghtz. They use the “hobbyist” channels/frequencies." now with me being a newbie in this kinda stuff i didnt know what that meant. but i was looking at some combo packages that come with its all, i noticed at the bottom of the product description that it had a disclaimer that instead of it coming equipped with all the channels it only has 7-8 to comply with federal regulation.

http://hobbywireless.com/12-13-ghz-syste...-2158.html

so does that mean i wouldn't need a license to use it as long as i am on those channels?

you also bring up an excellent point about the camera fov. i hadn't even thought of that.

i dont need some high fancy monitor. i would just like it to be semi clear so i can make out the target. i am not expecting 4k kinda resolution or anything just a decently crisp screen.

one concern came to my head...
we typically use 1 channel and stream it to our gogles... and we don't care if anyone else sees it - if yes most probably it is our colleague with other goggles.
i don't know if this is a problem in your case?
ie. you have x cameras and receiver... and i have a receiver and im "peeking" into what you are sending (the video is not encrypted in any way)

if you plan to use it outside... question is do you have "cold" days? (like below 0 Celsius) in that case i wouldn't go into NIMH - i've had bad experience with them in negative numbers... lipo didn't suffer that much.

as you stated "small solar" - this is an overkill... you would need a "charger" connected to every battery at every location... i'd stay for now with set of batteries as Fftunes said 2s (7.4) with a lot of mah - actually i don't know how much power it will consume by the cam +vtx over x hours -> you need to do some rough calculations... and test.

as for frequencies... lower freq have better penetration through objects, the drawback is that antenna is getting bigger (do a google search and compare 5.8 and 1.3 ghz antenna )

I was thinking NiMH would be better so he can leave them charged for long times, where as LiPos require more maintenance to be safe.
Didn't think about temperature (how cold is winter in texas?), but it's not gonna be high current anyway just for cam/vtx.