Module 13e ADF

The sense and loop elements combine to form a pattern called what?

• Omnidirectional

• Bi-Directional

• Figure 8

• Heart

• Cardioid

A quadrantal error corrector is mounted where?

• Close to the loop antenna

• Close to the sence antenna

• close to the ADF reciever

Can ADF antenna cable lengths be shortened?

• Yes, if L and C taken into account

• Never, only ever replace whole cable length

• Yes, only 2 re-terminations allowed before replace cable

Goniometer is the name given to the resolver configuration that connects the antenna to the indicator.

• True

• False

Night effect errors occur when sky conditions reflect waves that mix with the NDB ground wave signal.

• True

• False

To minimise Night Effect, _________ ADF frequencies in the band are reserved for NDBs.

• lower

• higher

Quadrantal error is greatest where (with respect to the longitudinal axis) ?

• 0, 90, 180, 270 degrees

• 45, 135, 225, 315 degrees

Loop mode has what advantage over ADF mode?

• The nulls are better defined

• Can sense two NDBs at once

• More sensitivity for low signal strength