Microphone Settings - Redback A 4565B Operating Manual

4.2.5 Microphone settings

Press the "microphone" button to display the screen shown in figure 4.4.
From this menu the chime options and action of the paging button are set.
1 Console Speaker - This button enables the speaker built into the A 4660. If enabled the chime will be audible
from the console as well as through the paging system.
2 Chime In - This button allows you to enable or disable the pre-annoucement chime on the paging audio. The
level can also be adjusted to suit the installation. For instance a user may require the pre-annoucement chime be
louder than the normal programming.
3 Chime Out - This button allows you to enable or disable the post-annoucement chime on the paging audio. The
level can also be adjusted to suit the installation. For instance a user may require the post-annoucement chime be
louder than the normal programming.
3 PTT Action - This button determines the action of the paging button. If momentary action is selected the paging
button will need to be held to page. If alternate action is selected the paging button needs to be pressed and
released to start paging. The paging mode will stay active for the period set by the timeout, or until the paging is
cancelled by the user.
5 Mic AGC - Allows for the microphones automatic gain control (AGC) effect to be adjusted up or down according
to installation requirements. AGC allows the signal to automatically adjust to compensate for variations in level
of peoples voices when making paging annoucements. Please note high levels of AGC will increase audible noise
in the system while paging.
6 Paging Level - Adjust the paging level to suit the installation. This allows for paging to be adjusted to suit the
level of programming from other sources connected to the system.
www.redbackaudio.com.au
Redback® A 4565B Evacuation Controller
Chime through local speaker ->
DISABLED
Enable intro and outro
chimes and chime volume.
Chime In Chime Out PTT Action
Enabled Enabled ALTERNATE
Vol Vol
-9B -9dB
3
2
Fig 4.4 - Microphone Settings Screen.
1
Speaker Control paging microphone
level and presence & level
for AGC.
Mic AGC
Enabled
Timeout
4m
AGC
1.5x
4 5
Redback® Proudly Made In Australia 25
Vol
-0dB
Back
6