Microwave Solutions MDU1720 MDU1720 X-Band Doppler Motion Detector User Manual August 11 2009

Microwave Solutions Ltd. MDU1720 X-Band Doppler Motion Detector August 11 2009

User manual

MDU1720 User Manual.doc Page 1
USER MANUAL
MDU1720
FCC-ID: ROO-MDU1720
IC: 10829A-MDU1720
Description
The Microwave Solutions MDU1720 Motion Detector Unit is an X-Band microwave
transceiver that utilises the Doppler shift phenomenon to "sense" motion. The unit,
contained in a lightweight plastic housing, features a dielectric resonator stabilised
FET oscillator, which provides stable operation over a broad temperature range in
either CW or low duty cycle pulse mode and a balanced mixer for enhanced
sensitivity and reliability.
The basic principle of operation consists of detecting the frequency shift between a
transmitted and a received signal reflected back from a moving object within the
field of view of the unit. The unit produces a low level output signal which can be
amplified and processed to provide an audible or visual alarm signal. The MDU1720
employs low cost surface mount manufacturing techniques which are field proven as
being rugged and reliable.
Absolute Maximum Ratings
Parameter
Symbol
Rating
Units
Comment
Supply Voltage
VCC
+5.25
V
Operating Temperature
TOP
-40 to +70
°C
Performance level not guaranteed
Storage Temperature
TSTG
-40 to +80
°C
Electrical Characteristics
Parameter
Symbol
Min.
Typ.
Units
Comment
Transmit Frequency
fT
10.500
10.525
GHz
Preset during manufacture.
Temperature Stability
∆f
MHz
Over TOP range below
Output Power
POUT
18
dBm
EIRP
Antenna Beamwidth
72
°
-3dB, horizontal with tab down
36
°
-3dB, vertical with tab down
IF Output Offset
VDC
-150
0
mV
Into free space
Sensitivity
-86
dBm
10dB S/N ratio
Noise
µV
In 3Hz – 80Hz bandwidth
Supply Voltage
VCC
4.75
5.00
V
Supply Current
ICC
40
mA
Pulse Width
5
µs
Min. duty cycle – 1%
Operating Temp
TOP
-10
°C
Full spec. compliance
MDU1720 User Manual.doc Page 2
Coverage Patterns
Connections & Mechanical Outline
Handling Precautions
The MDU1720 is sensitive to damage from ESD.
Normal precautions as usually applied to CMOS devices are sufficient when handling
the module.
Touching the connection points should be avoided before soldering the module into circuit.
Using a multimeter (e.g. for resistance measurement) between any of the connection
points may cause damage to the module.
Certification
Microwave Solutions Ltd. has established and maintains a Quality System that has been audited by BSI and holds ISO
9001:2008 approval under certificate FM56058.
The MDU1720 complies with the requirements of the RoHS Directive European Union Directive 2011/65/EU and with
the requirements of the REACH Regulations EC 1907/2006.
MDU1720 User Manual.doc Page 3
OEM Responsibilities
Manufacturers of mobile or fixed devices incorporating MDU1720 modules are authorized to use the FCC Grants and
IC Certificates of the MDU1720 modules for their own final products under the conditions referenced in this
document. It is the responsibility of the manufacturer of the final product to ensure that the MDU1720 module is
operated within the approved conditions shown below. If the FCC/IC label of the module is not visible when the
module is installed inside the final product then the outside of the final product must also display a label stating
"Contains FCC ID: ROO-MDU1720" and "Contains IC: 10829A-MDU1720".
Approved Operating Conditions to meet FCC/IC requirements
The MDU1720 module can be operated in full compliance with FCC/IC requirements (depending on the characteristics
of the final product) under the following conditions:
1) The power supply voltage provided to the module (at the module terminals) must be maintained within the
specified range of +5 ± 0.25 volts under all conditions of AC line voltage irregularities, battery voltages,
ambient temperatures and worst case load conditions.
2) If the module is operated under pulsed conditions, the rise and fall times of the power pulse shall be less
than 1 µs and, during the pulse, the power supply voltage shall be maintained within the limits of 1) above
under all conditions.
3) A minimum separation distance of 2.2cm is required between the user and the module when operating at
100% duty cycle. At a duty cycle of 40%, the minimum separation distance would be 1.4cm.
4) If the final product is designed only for use only within a building or to open building doors it can be operated
with any duty cycle up to and including 100% (averaged over 100ms).
5) If the final product is designed for use in any other situation except in motor vehicles or on aircraft, it can be
operated with a maximum duty cycle of 40% (averaged over 100ms)
6) If the final product is designed for use in motor vehicles or on aircraft, it can be operated with a maximum
duty cycle of 40% (averaged over 100ms) as long as the final product includes features to prevent continuous
operation (as defined in the FCC Rules and Industry Canada Standards).
FCC and Industry Canada statements:
This device complies with Part 15 of the FCC Rules and Industry Canada licence-exempt RSS standard(s).
Operation is subject to the following two conditions:
(1) This device may not cause harmful interference, and
(2) This device must accept any interference received, including interference that may cause undesired
operation.
This device may only be operated using the approved integral antenna.
This device complies with FCC and Industry Canada radiation exposure limits set forth for an uncontrolled
environment. End users must follow the specific operating instructions for satisfying RF exposure
compliance.
This device must not be co-located or operating in conjunction with any other antenna or transmitter.
Changes or modifications not expressly approved by Microwave Solutions Ltd. may void the user's authority
to operate this equipment
In the event that these conditions or the Approved Operating Conditions above cannot be met, then the FCC
and Industry Canada certifications are no longer considered valid and the FCC ID and IC Certification Number
cannot be used on the final product. In these circumstances, the OEM integrator will be responsible for re-
evaluating the end product (including the transmitter) and obtaining a separate certification.

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