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21016 SMU1-MPAB3 V1.3.doc
Each pair should be individually screened, with a common overall screen
connected to earth.
SMU1 Specification
Microphone Technology
Dynamic
Frequency Response
150Hz – 7kHz (+/- 3dB)
Sensitivity
-83.5dB re 1V/uBAR +/- 4dB
Impedance
200 ohm +/- 15%
Directional Characteristics:
From 200Hz – 2kHz
Greater than 10dB
From 2kHz – 5kHz
Greater Than 8dB
Switch (Max DC switching current)
50mA
LED current Requirment (24V DC)
~10mA
Busy Indication
Red LED
Speak Indication
Green LED
Cable Length (Filotex)
3 meters
MPAB3 Specifications
Power supply voltage range
15 – 30V DC
Supply current (typical)
55mA @ 24V
Audio output nominal
0dBu
Audio output max.
+10dBu
Output impedance
< 50 ohms
Load impedance
> 600ohms
Distortion T.H.D.
< 0.05%
Signal to Noise ratio
Pre-announcement chimes
2 or 3 tone
Microphone gain trim range
Preset
Surveillance tone Frequency
20kHz
Surveillance tone Level
Adjustable
Surveillance tone stability
100ppm/
o
C
Operating Distance (From Rack), SMU1
100m
Operating Distance(From Rack), SMU1 used with
MPAB3
500m
Operating temperature range
0 – 40
o
C
Max Humidity
85% non-condensing
EMC operating environment
(As defined by EN50081-1, EN50082-1)
Domestic, Commercial,
Light Industrial.
Manufactured to Safety Standard
EN60065:1998
