I.S. INTERCOM
20-278-12
TYPE ABMA4 USER MANUAL
12 OF 21
Issue: 05
that left hand speaker is good and right hand speaker is faulty. Either the fault is due to an open circuit to the
speaker or speaker is not pulling enough current for normal operations.
The tone occurs for almost a second for menu changing from ‘Testing’ to ‘Complete’.
Figure 9: Test Speakers Completed View
After the test has been completed, you can exit at any time by pressing either the ‘Menu’ or Enter Key.
3. Mute Level Menu
This menu allows you to view the mute level state and to adjust the mute level. Mute level is sometimes
called Squelch (2-way radio terminology) and is used to turn the speakers off to save battery power until
someone talks or PSA is received. You should adjust the mute level for noisy environments such as
background electrical noise or RF pickup, which will cause speakers to open (turn-on). The default level is
set to ‘Low’ noise. There is a setting below that called ‘Clean’ for very electrically quiet areas and two setting
above that called ‘Med’ and ‘High’ for noisier areas. The menu is shown:
Figure 10: Mute Level Menu
To enter a menu option (eg. ‘View Mute’) you press the ‘Enter’ key. To move between menu options press
the up (
⇑
) or down (
⇓
) keys.
1.
View Mute
Allows you to view the mute level.
2.
Set Mute
To enter ‘SET MUTE’ you must enter a four-digit password. The password prevents unauthorised access
to the AMBA4 and should be setup when an authorised technician installs the unit. The current password
for version 1.0 of the software is 4321 and is set using the up (
⇑
) or down (
⇓
) keys and the ‘Enter’ key.
Below is shown the ‘Password Access’ screen and follow-on screen once a successful password has been
entered:
