INTRODUCTION
The ONE-PTT dynamic microphone adds more versatility to your ONE unit.This new
device allows you to have within your reach a public announcement input.
This Push To Talk microphone can be directly connected to the priority audio input to
bypass the back ground music. As it is directly powered from the USB port inside the unit,
you do not need to add an external power supply.
With the included microphone stand, you can hang this microphone to the ONE 500
side for a fast and easy call. You can also fix it to any other surface following your
preferences.
DESCRIPTION
This accesory is designed to use in ONE systems, it includes an audio preamp board
and all the accessories needed to install it.
The preamp board takes power from the ONE USB port. It includes a quality
preamplifier with a gain of 40dB to convert the microphone level to an output line level
compatible with 1Vrms inputs. The included circuit also converts the push to talk signal to
a contact output, that is already prepared to be connected in the PRIO audio inputs 1 or 2.
CONFIGURATION
Connections should be made according to the quick guide located in the last page of
this manual, no further configuration is needed. With the ONE default configuration, if you
press the PTT microphone, the audio will be routed to all zones. You can change the
corresponding input settings in the PA Matrix screen menu.
Additional advanced configuration could be applied to adapt the PTT to your needs.
For example:
Enable the use of the PTT when the system is in emergency (VA) state: Enter In
advance settings by pressing ACK+OK for 3 seconds. Modify the variable called
“DAM_PA_SRC_IN_VA_CUT_THRESHOLD” by selecting ID:2299 (FW v2.0.0.2). Change
the value to 3 and input1 will be available to be used in VA state according to the system
inputs priorities.
A similar process must be done to allow the PTT if the AC power is not active (battery
mode): Enter In advance settings by pressing ACK+OK for 3 seconds. Modify the variable
called “DAM_PA_SRC_IN_BATT_CUT_THRESHOLD” by selecting ID:229A (FW
v2.0.0.2). Change the value to 3 and input1 will be available to be used in battery mode
according to the system inputs priorities.
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Figure 1: Examples of PTT placement in a system.
