Bosch Appliances DS820 manual Functions, Microwave Signal Processing, Test Features

Intrusion Alarm Systems DS820 and DS835 Series TriTech Motion Detectors

DS820 and DS835 Series TriTech Motion Detectors

www.boschsecurity.com

u Artificial intelligence

u Five detection layers including look down zones

u Five mounting options

u Selectable PIR sensitivity

u Vertical and horizontal pointability

The DS820 and DS835 Series Detectors provide immunity to false alarms caused by pets. Passive Infrared and microwave processing provides excellent catch performance with freedom from false alarms.

Frequency	Model
9.9 GHz	DS820-B, DS820B-FRA, DS820B-ITA,
	DS835-B, DS835B-FRA, DS835B-ITA, DS835C
10.475 GHz	DS820CH-SWI, DS835CH-SWI
10.525 GHz	DS820, DS820-BEL, DS820-CAN, DS820-NEL,
	DS835, DS835-BEL, DS835-CAN, DS820-NEL
10.687 GHz	DS820-A, DS835-A

Functions

Signal Processing

Uses passive infrared and microwave technologies to provide an alarm condition when both fields of protection are simultaneously activated. Alarm signals must meet the signaling requirements of both technologies to activate an alarm. Adjustable PIR and microwave sensitivity.

Microwave Signal Processing

Pattern recognition circuitry identifies and ignores repetitive false alarm sources. Adaptive processing adjusts to background disturbances. This helps to reduce false alarms while maintaining catch performance.

Motion Analyzer II Processing

Motion Analyzer II uses multiple thresholds and timing windows to analyze timing, amplitude, duration, and polarity of signals to make an alarm decision. It will not alarm on extreme levels of thermal and illumination disturbances caused by heaters and air conditioners, hot and cold drafts, sunlight, lightning, and moving headlights. Provides three sensitivity settings.

Test Features

Externally visible alarm LED flashes to indicate a trouble condition.

Draft and Insect Immunity

The sealed optical chamber provides immunity to drafts and insects.