Orbcomm Antenna Details; Broadcast Antenna Details; Table 14: Suggested Orbcomm Antennas - Avidyne Entegra EX5000 MFD Series Installation Manual

4.6.1 ORBCOMM Antenna Details

To improve ORBCOMM reception performance and minimize potential damage to the ORBCOMM
datalink transceiver, an antenna design with a DC-short between the antenna center conductor and
shield termination is required. The following commercially available antennas satisfy this requirement:

Table 14: Suggested ORBCOMM Antennas

Manufacturer
Comant
Sensor Systems
➥
Refer to manufacturers for detailed performance specifications and aircraft applicability
Due to the low signal levels inherent with satellite communications, adhere to the following guidelines
and recommended practices:
●
Mount the ORBCOMM antenna on the aircraft top-side, as high on the fuselage as practical.
Mount the antenna no closer than 36 inches to other transmitters. Relocation of other less
location-sensitive transmitters may be necessary to achieve optimal datalink performance.
● On radar-equipped aircraft mount the antenna as far aft as possible, but no closer than 36 inches
from vertical obstructions (ex. vertical stabilizer). Reflected radar energy may cause damage to the
datalink transceiver.
● Install in accordance with the applicable portions of AC43.13 and antenna manufacturer
instructions.
For more information, see Appendix R: ORBCOMM Datalink Antenna Mounting.
!
This Installation Manual does not contain approved data for type-specific aircraft
antenna installations.

4.6.2 Broadcast Antenna Details

● Mount the antenna no closer than 36 inches to VHF-Comm transmitters of 15 Watts or less. For
more powerful transmitting antennas, separation should be a minimum of 48 inches.
●
If an XM/VHF-Comm combo antenna is being installed and is replacing the operation of an
existing approved antenna installation, the existing separations are acceptable. SATCOM
antennas transmit at 40 Watts and should be separated by the largest distance possible. This
distance must be a minimum of 36 inches.
● When routing the broadcast antenna cable, the maximum possible separation from transmitter
antenna feed cables must be considered, especially with SATCOM and other high power
transmitters. Antenna feed cables of VHF transmitters of 15 Watts or less should require only a
minimal separation.
●
Receive-only antennas such as GPS and ADF do not produce interference and require little
separation. The broadcast antenna should be placed as close as possible to these types of
antennas to gain separation from transmitters.
➥
For further details, including installation pre-testing, please refer to the Heads Up Technologies
XMD076 XM WX Receiver Installation Manual, document number XMD076-3 or Avidyne MLB700
Multilink Broadcast Receiver Installation Manual, document number 600-00174-000.
P/N
CI 177-4
CI 248-30
CI 108-1
CI 211-1
S65-8280-10
- 24 -
EX5000 Installation Manual
P/N 600-00073 Rev 24
Application
Max 210 kts indicated at 10,000 ft.
Max 210 kts indicated at 10,000 ft.
Max 600 kts TAS at 35,000 ft.
Max 600 kts TAS at 35,000 ft.
Max 600 kts TAS