Part 1 ILS DME

Question 1

All Marker Beacon transistors transmit on a frequency of

Answer 1

75 MHZ

Question 2

Outer Marker is modulated by a audio tone of

Answer 2

400 HZ

Question 3

How far is the outer marker from the runway

Answer 3

3-7 MILES

Question 4

Middle Marker is modulated by a audio tone of

Answer 4

1300 HZ

Question 5

How far is the middle marker from the runway

Answer 5

3500 feet

Question 6

Outer Marker uses what light

Answer 6

Blue

Question 7

Morse code for outer marker

Answer 7

dash-dash

Question 8

Middle marker uses what light

Answer 8

Amber

Question 9

Morse code for middle marker

Answer 9

dash-dot

Question 10

Marker Beacon Antenna is located where

Answer 10

on the bottom of the fuselage - referred to as a boat antenna

Question 11

Localizer provides guidance to the runway in what direction

Answer 11

lateral (left/right)

Question 12

Localizer modulation

Answer 12

left is 90 HZ right is 150 HZ

Question 13

Localizer frequency range

Answer 13

108.10 - 111.95 odd 1/10 MHZ example 108.10, 108.30, 108.50

Question 14

Selection of a localizer frequency automatically tunes

Answer 14

glide slope and DME

Question 15

how many V is required to deviate the needle 1 dot

Answer 15

75mV

Question 16

how many V is required to drive the warning flag out of view

Answer 16

250mV

Question 17

Typical glide-path angle is

Answer 17

3 degrees

Question 18

Glideslope operates in the frequency range of

Answer 18

329 - 335 MHZ

Question 19

Glideslope Modulation is

Answer 19

Above 90Hz Below 150HZ

Question 20

ILS Dot represents

Answer 20

1.25 Total 5 degrees

Question 21

Glideslope Dot represents

Answer 21

0.35 Total 1.4 Degrees

Question 22

Signal strength will be equal when the aircraft is located on the

Answer 22

Glidepath

Question 23

ILS

Answer 23

Instrument Landing System

Question 24

DME

Answer 24

Distance Measuring Equipment

Question 25

Purpose of DME

Answer 25

To provide distance information

Question 26

How does DME work

Answer 26

Measures from the aircraft to a VOR or Localizer facility

Question 27

What is the airborne transceiver called

Answer 27

interrogator

Question 28

Same antenna for DME is used for

Answer 28

TX and RX (transmitting and receiving)

Question 29

DME indication may be on

Answer 29

RMI, HSI or independent DME indicator

Question 30

What is on the control Panel DME

Answer 30

Standby, Norm, Override, Test Function

Question 31

what is on the indicator DME

Answer 31

Distance in NM, Warning/Fail Flag and Test (000.0)

Question 32

DME hold

Answer 32

a new VOR/ILS may be selected, but the DME continues to track the previous ground station

Question 33

DME frequency range is

Answer 33

978-1213 MHZ

Question 34

DME reply pulses will be ____ MHZ higher or lower than interrogation Pulses

Answer 34

63 MHZ

Question 35

“X” channel interrogations are how many microseconds P.R.F.

Answer 35

12

Question 36

“Y” channel interrogations are how many microseconds

Answer 36

36

Question 37

When the DME interrogator senses a DME station within rage, what does it transmit

Answer 37

interrogation Pulses (pulse pairs)

Question 38

how long does the ground station hold the signals after it receives them

Answer 38

50 microseconds at a frequency +/- 63 MHZ

Question 39

Once the DME interrogator begins to recognize its own replies what happens

Answer 39

enters track mode

Question 40

The DME stations transmits its morse code ident tone at what frequency

What is VOR/LOC tone

Answer 40

1350HZ every 30 seconds

1020HZ

Question 41

DME memory mode holds the last reading or velocity rate for how long

Answer 41

10 seconds

Question 42

By measuring the distance (rho) to more than one DME station , what can be determined

Answer 42

position fix

Question 43

Two DME readings (rho rho) provide position fix. what is 3 readings (rho-rho-rho)

Answer 43

required to truly remove ambiguity