User manual

page 9 of 15
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