ASL PS-279 Master Station

System Specifications

• Dynamic Range - 80 dB (1 kHz, THD < 1%)

• Frequency Response - 200 Hz – 15 kHz (-3 dB)

• Call Signal (Send) - 2.8 mA

• Call Signal Threshold (Receive) - +2.4V DC

• Operating Voltage - 24-32V DC


Intercom Line

• Impedance - 350 Ω (1 kHz), 2.2 kΩ (DC)

• Audio Level - nom. -18 dBu, max. 0 dBu


Switch Mode Power Supply

• Mains Voltage Range - 100-240V AC, 50-60 Hz

• DC output voltage: +30 V DC (+/-5%)

• Max. output power: 75 watts

• Circuit breaker delay time: 0.2 sec.

• Automatic reset time: 3.0 sec.


Description Title

DC Input

• Supply voltage: 24 – 30 V DC


Headphone Driver Amp

• Max. output level:

 monaural: 16 Vrms (@ 200 Ω

 binaural: 2 x 10.3 Vrms (@ 400 Ω

• Max. output power:

 monaural: 1.3 Wrms (@ 200 Ω

 binaural: 2 x 0.27 Wrms (@ 400 Ω


Mic Pre-amp

• Gain: max. 40 dB

• Presence filter: +6 dB @ 5 kHz

• Power to electret mic: 9 V DC


Side Tone

• Rejection: 0 - 30 dB adjustable

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