Laversab ARTS 7000, Руководство пользователя

Страница: 53 / 194

ARTS 7000 User Manual Aviation Systems
Rev A6 Page 53
Coupler in position on the bottom antenna. In this case the coupler is
being used as a shield – note the termination is connected on the
coupler connector.
The coupler can be used in 2 modes:
1. Antenna shield. The coupler can be used to shield a radiating antenna. For example, in
testing a diverse Transponder system the Top or Bottom antenna can be shielded to
ensure isolation between the antenna under test and the other system antenna.
Whenever the coupler is used as a shield the cap must be on the connector. Note the cap
is an RF termination at 50 Ohms. Without this connector, tests may be subject to failure.
2. Standard coupler . Use of the coupler effectively shields the transmission between the
test set and the aircraft. Shielding these transmissions removes or limits the possibility of
interference with local ATC operations or active Aircraft TCAS systems. Testing is more
consistent and accurate when using the coupler.