１ , pure model cloud stage, camera lens and shield controller
Its function is mere implementation to only station or much stage executive cloud stage rotates, control focusing, aperture adjusts the fluctuation a simple move or action, pickup camera camera lens that goes up to cloud stage reach scorch to change times function, the shield that still can go up to cloud stage makes more sophisticated device heat, the control such as defrost.

2, the hand uses video switch implement
It is video switch implement a the simplest kind, there are a certain number of key-presses on this device, in order to outputs the picture of some pickup camera that shows a choice to onefold monitor. The hand moves switch to contrast economy reliable, but 4 ～ switch of 16 video input arrives on a monitor output. Its defect is to use this sort switch implement when undertaking to pickup camera the hand uses switch, the conference on monitor appears perpendicular retroflexion and roll, the ability after the perpendicular and synchronous pulse that till monitor has certainly,inputs pickup camera can disappear.

3, ordinal video switch implement
Multichannel video signal should send same point monitoring, can all the way video is corresponding a monitor, but monitor is covered an area of big, the price is expensive, if do not ask momently monitoring, a switch can be added in monitoring room implement, receive camera output signal switch implement input end, switch implement output termination monitor, switch implement input end cent is 2, 4, 6, 8, 12, 16, switch implement the hand uses switch, automatic switch way of two kinds of works, the hand changes way is to want to see dial switch which all the way all the way; Automatic means is to let the video that sets beforehand press switch of ordinal delay time, switch time can adjust through a knob, arrive in 1 second commonly between 35 seconds. Switch implement low-cost (have 349 yuan only commonly) , connection is simple, the operation is convenient, but in a time paragraph inside an image in can seeing an input only. Want to watch many camera image at the same time on a monitor, break up with the picture with respect to need implement. Ordinal video switch implement it is the image that makes come from much stage pickup camera choose to show on a monitor, show another again, the indication order of pickup camera can be installed by user program with indication retention period or revise. Ordinal video switch implement use perpendicular and removed switch, twinkle in order to dispel the image on monitor, shake or roll, make observe the person of monitor is watched cozily. Alleged and perpendicular removed switch, it is a kind of means of video of the switch when video is broadcasted. Switch implement the perpendicular and synchronous pulse that medium electronic system searchs each pickup camera, next switch the video between this one perpendicular pulse, the perpendicular scroll that eliminates monitor to go up and shake, get do not have the effect of scroll switch. Realizing the premise that does not have scroll switch is pickup camera need has a synchronous circuit, when pickup camera of so much stage uses the power source power supply with same phasic alternating current source, can make much stage pickup camera produces perpendicular and synchronous pulse at the same time, this also is to use 24 V one of accounts that the pickup camera of alternating current source can get applied extensively in closed-circuit television supervisory system.
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