E9H01

What is the effective radiated power of a repeater station with 150 watts transmitter power output, 2-dB feed line loss, 2.2-dB duplexer loss and 7-dBd antenna gain?

1. 286 watts

E9H02

What is the effective radiated power of a repeater station with 200 watts transmitter power output, 4-dB feed line loss, 3.2-dB duplexer loss, 0.8-dB circulator loss and 10-dBd antenna gain?

1. 317 watts

E9H03

What is the effective radiated power of a repeater station with 200 watts transmitter power output, 2-dB feed line loss, 2.8-dB duplexer loss, 1.2-dB circulator loss and 7-dBd antenna gain?

1. 252 watts

E9H04

What term describes station output (including the transmitter, antenna and everything in between), when considering transmitter power and system gains and losses?

1. Effective radiated power

E9H05

What is the main drawback of a wire-loop antenna for direction finding?

1. It has a bidirectional pattern

E9H06

What is the triangulation method of direction finding?

1. Antenna headings from several different receiving stations are used to locate the signal source

E9H07

Why is an RF attenuator desirable in a receiver used for direction finding?

1. It prevents receiver overload from extremely strong signals

E9H08

What is the function of a sense antenna?

1. It modifies the pattern of a DF antenna array to provide a null in one direction

E9H09

What is a receiving loop antenna?

1. One or more turns of wire wound in the shape of a large open coil

E9H10

How can the output voltage of a receiving loop antenna be increased?

1. By increasing either the number of wire turns in the loop or the area of the loop structure

E9H11

Why is an antenna with a cardioid pattern desirable for a direction-finding system?

1. The response characteristics of the cardioid pattern can assist in determining the direction of the desired station

E9H12

What is an advantage of using a shielded loop antenna for direction finding?

1. It is electro-statically balanced against ground, giving better nulls

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