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JA94-044 Dual Audio Controller
– AMS44 Compatible
Installation and Operating Manual
Rev A
Page 4
Receive Composite Audio load
600
Ω
±
10%
Intercom Tie Line type 1 rated load
2000
Ω
±
10%
Intercom Tie Line type 2 rated load
2000
Ω
±
10%
Intercom Tie Line type 1 maximum load
666
Ω
max (3 loads)
Intercom Tie Line type 2 maximum load
285
Ω
max (7 loads)
Volume Controls
Receive Audio control variation
32
±
3 dB min
ICS Audio control variation
42
±
3 dB min
Crosstalk Level
Input to Output crosstalk
≤
55 dB
Input to Input crosstalk
≤
60 dB
Station to Station crosstalk
≤
65 dB
Audio Noise Level without Signal
Noise level below the rated output
≥
60 dB
1.4.1.2
Audio Performance, Other
CVR HI / LO output circuitry type (Normal)
differential
CVR HI / LO output circuitry type (Emergency)
single ended
Microphone inputs designed for MIC type
amplified dynamic/electret
Microphone inputs bias voltage
12 Vdc
±
10%
Microphone inputs circuitry type
single ended
MUSIC LEFT / RIGHT HI / LO audio input circuitry type
differential
FRONT MUSIC LEFT / RIGHT audio input circuitry type:
single ended
MUSIC attenuation
38 dB max
RECEIVE AUDIO input circuitry type
differential
PHN HI / LO output circuitry type
single ended
MIC output circuitry type
differential
RX Composite Audio output circuitry type
differential
ICS TIE HI / LO Circuitry Type
differential
PHN HI / LO output music fade in duration
2.5 ± 1.0 seconds
VOX Threshold level range relative to rated MIC input
-28 to +6 dB
VOX off Delay Time range
0.5 to 2.0 seconds
Transmit Timeout Timer
90 ± 10 seconds
1.4.1.2
Lights Input
LIGHTS INPUT ranges
0 to 28, 0 to 14 and 0 to 5 Vdc
LIGHTS INPUT current
10 mA max.