User manual

ADPRO FastTx by Xtralis Installation and User Manual
Doc 11949_06 33
3.3.2 Audio Screw Terminal Connector
The audio screw terminals may be used for connection of certain audio devices, such as
microphones and low power speakers. Connections and ratings of the connector block are:
Figure 35: Audio Connector Pinouts
Table 6: Audio Screw Terminal Connector
3.3.3 Audio Configuration
The audio output is normally connected to the input of an amplifier capable of driving a speaker.
With a suitable amplifier, multiple speakers may be driven to give a global announcement. The
output level is approximately equal to the input level provided at the receiver.
Pin Function Signal Pin Specifications
Line Level Audio Output 1 Unbalanced, impedance 600 ohm
Nominal voltage level = 315 mVrms
Ground 2 0 V
Input 3 Unbalanced, impedance >6 K ohm
Nominal level = 10 mVrms to 400 mVrms
Ground 4
Local Speaker Speaker (+)
Speaker (-)
5
6
Balanced, impedance = 8 ohm
Nominal output power = 1 W
Total harmonic distortion < 5%
Ground 7
Local Microphone Microphone (+)
Microphone (-)
8
9
Differential impedance > 3 K ohm
Single ended impedance > 6 K ohm
Nominal signal level is
100 uV rms to 10 mV rms
'AUDIO'
9-pinDECA Connector
1 2 3 45678 9
GND GND GND
OUT IN SPKR + SPKR - MIC + MIC -
P73 audiopinouts conn.cdr