Axnes AS
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Page 2-4
2.4 Power on/off
The PNG BST30 will by default automatically turn on when power is applied either to external
power or USB power. The BST35 will be turned on when the on-button is pushed (battery
mode), or power is supplied through USB or external power lines.
The system will conduct an initial in-built test, and any errors will be displayed.
After power-up, the system loads the last used configuration and is ready for use.
The system can be turned off by a push and hold of the power off button for 3 seconds. The
system can be re-activated through a short push on the on button. At re-activation, the last
used configuration is loaded.
It should be noted that default power on and charging behavior can be controlled through
device configuration and the Axnes device configuration tool PolyConnect.
2.5 Noise cancelling
The BST30/35 implements active noise cancelling of the microphone signal from the headset
port. Noise cancelling ensures very high performance of the VOX operation, and speech
intelligibility, even in extremely noisy environments such as directly in front of a landing
helicopter or similar. The noise cancelled signal is transmitted on the radio and used in the
side tone. When using the headset port of the BST30/35 in windy environments, the
microphone should always have a windsock mounted.
2.6 Microphone detect
The BST30/35 headset port implements active microphone detection when a headset is
connected. The BST30/35 will identify the microphone type and set parameters for gain,
impedance and bias accordingly. The active microphone detect can be disabled in the menu,
and microphone type can be manually set. It is recommended to use active microphone
detect.
When a headset is detected the arrow up/down button will have the function of volume
control independent of the key lock status. When key lock is lifted the arrow up and down will
be part of the menu navigation.
Without a headset detected the arrow up/down button will follow the key lock status and be
part of the menu navigation.
The BST30/35 implements vocal audio feedback on some of the user operations if a headset
is connected to the headset port. The vocal feedback helps with the navigation and alerts the
operator of unintended operation of buttons and functions.