The AV-587 antenna coupler is an antenna signal splitter/diplexer providing three outputs from a single antenna. One output provides a combined VOR/LOC/GS signal. A second output provides a combined VOR/LOC signal. And a third output provides a GS signal.
The necessity of bringing this product forward comes from advancing technology in avionics. Newer designed navigational radios have only one antenna input to receive all three (VOR/LOC/GS) signals whereas older legacy radios had a separate antenna input for the VOR/LOC signal and another antenna input for the GS signal.
In an aircraft instrument panel with one newer navigational radio and a second older legacy navigational radio, the AV-587 is the article that will provide the necessary signals to both radios utilizing a single antenna.
|Frequency||Port 1: Antenna|
Port 2: NAV/LOC/GS
Port 3: NAV/LOC
Port 4: G/S
|Impedance||50 Ohms Nominal|
|Insertion Loss||less than .6 dB above 3.0 dB|
|Isolation||greater than 22 dB|
|RF Power Capacity||Receive Only|
|Max Weight||0.38 lbs.|
|FAA TSO||C34e, C36e, C40e|