190-01879-11
GMA 245/245R Installation Manual
Rev. 6
Page 2-4
2.4 Installation Considerations
The GMA 245 interfaces with various avionics equipment. Fabrication of a wiring harness is required.
Sound mechanical and electrical methods and practices are required for installation of the GMA 245.
NOTE
3D audio is not available when using a mono headset or in aircraft wired with mono
headset jacks. 3D audio (even if enabled), will not be available with mono audio headset
jacks or mono headsets. It is recommended that stereo jacks and stereo headsets be used.
2.5 GMA 245R Status LED
The GMA 245R has red and green status LEDs visible on the front of the unit that indicate the unit’s
current status. The status indications are:
2.6 GMA 245R Installation Guidance for Best Bluetooth Performance
The GMA 245 (panel mount) provides optimal Bluetooth performance because the Bluetooth transceiver is
mounted inside the cockpit with an unobstructed view of the phone and other devices being used in the
cockpit. Good Bluetooth performance can be also be obtained with the GMA 245R (remote mount) if
mounting location and orientation are selected to keep the instrument panel (and other aircraft metal
structures) from blocking the Bluetooth signal.
GMA 245R mounting location/orientation will vary for each installation depending on aircraft body type
(metal or fiberglass) and the surrounding structures/equipment. The GMA 245R Bluetooth transceiver is
located behind the black plastic front face of the unit as shown in the red rectangle in Figure 2-1.
Figure 2-1 GMA 245R Bluetooth Transceiver Location
For best performance, mount the GMA 245R with the front of the unit facing the cockpit and centered
laterally between the two aircraft sides. For example, mounting the GMA 245R at the bottom of a center
radio stack facing into the cockpit (aft) typically works well, although mounting it just below the
instrument panel would likely produce better results.
Table 2-9 Status LED Indications
LED Indication
Description
No Light
No Power
Steady Green
On, but not communicating via CAN Bus
Flashing Green
On and communicating via CAN Bus
Red
Hardware Fault
Alternating Red/Green
CAN bus network error two similar devices are
configured with the same unit ID