The Power transmitters
17
5
The Power transmitters
5.1
Design and function
Each Power transmitter has an active amplifier for the microphone signal, a data
memory, a rechargeable Li-Ion battery, a digital radio module and an analogue radio
module with antenna inside.
The transmitters have the following external characteristics:
Element Description
Microphone storage place
Sensor socket
for connecting the microphone / hydrophone
I/O pushbutton
short pressing
K switches the device on
K sends the device ID to potential recipients
K makes the LED bar show the current battery level for
3 seconds (while a measurement is running)
long pressing
K switches the device off
Antenna socket
Antenna socket for connecting the analogue radio antenna
Ventilation/venting membrane
