Rev A
Page 9
JA35-100 Audio Summing Amplifier - Remote Mount
SECTION 3 – OPERATION
3.1
Introduction
This section contains the operating instructions for the JA35-100.
3.2
Emergency/Normal Mode Operation
Note
: The JA35-100 has no integrated operator controls. However, a remote-mounted NORM/EMER switch
or button may be installed, which affects the operation of the unit.
3.3
System Operation
All operation is described for normal operating and emergency operating mode with aircraft electrical power supplied,
unless stated otherwise.
CAUTION
: The JA35-100 is configurable for several different operational modes. Check the configuration of
your unit with the installing agency
3.3.1
Normal Mode of Operation
The JA35-100 is in Normal mode when the aircraft electrical power is applied to the +28VDC POWER INPUT and any
external Normal/Emergency (NORM/EMER) switch is set to NORM.
3.3.2
Emergency Mode Operation
The JA35-001 is in Emergency Mode when the electrical power is not applied to the +28VDC POWER INPUT or any
external Normal/Emergency (NORM/EMER) switch is set to EMER.
In Emergency Mode, the JA35-100 Input 1 and Input 4 are routed directly through mechanical relay contacts to the
Output 1 and Output 2 respectively.
3.3.3
Audio Input Combined Operation
When the JA35-100 is configured for Audio Input COMBINED Operation, all six audio inputs are summed into both
the outputs.
3.3.4
Audio Input Split Operation
When the JA35-100 is configured for Audio Input Split Operation, the first three audio inputs are summed into
Output 1 and the second three audio inputs are summed into Output 2.
3.3.5
Audio Input Combined Priority Operation
When the JA35-100 is configured for Audio Input Combined Priority, it mutes all audio from inputs with a higher input
number, i.e. Input 1 will mute all inputs greater than 1.
3.3.6
Audio Input Split Priority Operation
When the JA35-100 is configured for Audio Input Split Priority, all audio from inputs with a higher input number but
less than 4 is muted for the first three inputs and all audio from inputs with a higher number than 4 is muted for the
second three inputs.
