P139-HD Audio System User Manual
GA063-3 Rev G 08/25/2015
Page 30 of 35
Appendix B
– Specifications
Parameter
Conditions
Value
Unit
Electrical Characteristics
Max. Input Voltage
60
V DC
Min. Input Voltage
12
V DC
Max. Input Current
5
A
Min. Input Current
1
A
Gnet Voltage
Supplied by G13000
24
V DC
Max. Gnet Current
Per Gnet bus
0.5
A
Max. Dimmer voltage
DC, AC or PWM input.
28
V
Audio Characteristics
Max. Microphone Input
MIC GAIN set to minimum
4.5
dBV
Microphone Input
Impedance
500
Ω
Max. Earphone Output
EAR GAIN at maximum
13.5
dBV
Expected Earphone
Impedance
150 or
600
Ω
Max. Receive Input
RX GAIN set to minimum
14.0
dBV
Receive Input Impedance
600
Ω
Max. Transmit Output
TX GAIN at maximum
6.0
dBV
Expected Transmit
Impedance
150
Ω
Keyline Characteristics
Headset PTT Key Voltage
Keyline must be pulled below this value to key
0.5
V
Max. Radio Keyline
Voltage
Pull-up voltage provided by radio
28
V
Max. Radio Keyline
Current
1
A
Table 4 Specifications