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Without a quad you would only be
able to view one camera at a time.
A quad is an accessory to your surveillance system that splits a video monitor into 4 screens. A quad is only needed when (1), you are using more than one camera and using a VCR or VISEC to
record or (2), when you are only monitoring and not recording at all.
These are high resolution real time quads that support up to 4 cameras. You also have the ability to playback and zoom in on
RECORDED video.
There are other products out there that can split a screen more than four ways, but I don't recommend them. Why? Because video quality worsens
the more ways you split a screen.
A quad is not needed when using a DVR to record because DVRs have a built-in quad.
Below are two examples of how a quad works: This is a surveillance system that is monitored
only:
This is a surveillance system recording
and monitoring:
 4
Channel Color or Black & White Quad
• QD-104 Black/White 4 Channel Quad
• QD-904R Color 4 Channel Quad
Features include:
- Full duplex allows transfer of recording and playback
video at the same time.
- 2x2 zoom
- 60 frames per second
- Real time clock
- Title generator
- On-screen display
- No boarder for full quad display
- 2H adaptive comb filters for Y/C separation
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