Multiplex Technology 4CH H.264 - Manual (Page 20)

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4.3.2 Sensor Setup
Item Description
Alarm Duration(Seconds) Alarm duration time (1~60 seconds).
Sensor Popup Check the box to Enable/Disable popup screen function for all channels.
When Sensor is detected in LIVE mode, the detected channel image will
pop up in full screen display.
Sensor Polarity Click or press ▼ to select between HIGH/ LOW voltage for triggering
sensor detection or OFF to turn off polarity for each channel
Low Polarity ： Sensor has not been triggered. When connected, sensor
will be turned on (N.O. → N.C.).
High Polarity ： Sensor has been triggered. When connected, sensor
status will be turned off (N.C. → N.O.).
Off ： Sensor is deactivated, and will not be turned on/off.
All off Set all sensors polarity to off.
All Low Set all sensors p olarity to low level.
All High Set all sensors p olarity to high level.