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2 Near-field monitor, BITE
2) Check the operational status of 3 BITE, system status e.g.
the monitor system watchdog
3) Troubleshoot wrong bearing
indications
5 Re-adjust antenna systems
6. Implementation 1) Verify the impact of the 3 En route, terminal requirements
requirements on the location and
the type of the ground station
procedures
2) Check the conformity of the
system to ITU
3 ITU regulation, ICAO Annex 10
3) Check the conformity to national
regulations
3 National regulations
7. On Board
Equipment
1) Describe the on board equipment 2 Antenna, receiver, (MMEL/RNP)
2) Describe the various HMI 2 CDI, RMI, HIS, ND, PFD
3) Describe how the VOR 2 Single VOR, VOR-VOR, approach
information is used on board procedures, manual mode,
automatic mode
Advance first edition (unedited) version – 30 August 2009
72
Topic Intermediate Objectives
The students should be able to:
Level Content
8. Compliance with 1) Define the global performance 1 Coverage, accuracy, availability of
Standards criteria for CVOR and DVOR the system, integrity, continuity
2) Perform typical measurements 3 Spectrum analysis, modulation,
output power, ID code
3) Calibrate 4 Flight inspection
4) Troubleshoot 5 Carrier frequency deviation, depth
of modulation, lack of power,
harmonics ratio
6.5 Ground Based Systems - DME
1. Overview 1) Describe the measurements 2 Distance, time measurement
2) Describe the basic principle of the 2 A/C interrogation ground reply,
system interrogation stagger, station
frequency
3) Explain the TACAN equipment 2 DME compatible, amplitude
and the VORTAC configuration modulated at 135Hz and 15Hz
bearing information
4) Explain the frequency spectrum 2 See Annex 10, links to other
and channel spacing allocated navigation systems
2. Use of the System 1) Explain the operational use of 2 En route, terminal area,
DME procedures, instrument
approaches, multi DME
navigation
2) Theorize the principles of the 5 Pulse carrier modulation, coding
DME/N principles, channels definitions
3) Explain the advantages of DME 2 Accuracy, integrity
4) Explain the disadvantages of DME 2 Saturation level, minimum
interrogation number, sensitivity
to interference, limited coverage
5) Justify and theorize the DME/N
versus the DME/P
5 Technical differences
6) Describe the current situation 2 Density of DME/N and DME/P in
use in your area
7) Describe the role of DME
according to your ANS policy
2 Part of the RNAV concept
3. System 1) Describe air - ground link 2 Elements of the avionics systems,
Architecture nature of air - ground and ground -
air transmissions
4. Ground Station 1) Draw and explain the block 2 Electronic cabinet, antenna
Architecture diagram of a DME ground station system, power supply, remote
controls and monitoring
2) Design a DME station according
to operational requirements
4 Coverage, identification code
5. Transmitter Sub 1) Define main signal parameters for 4 Carrier frequency stability, output
System a DME power, signals generated
Advance first edition (unedited) version – 30 August 2009
73
Topic Intermediate Objectives
The students should be able to:
Level Content
2) Perform the typical measurements 4 Power measurements, spectrum
on the signals by using standard measurements, modulation
equipment measurements
6. Antenna Sub 1) Explain and describe the generic 2 Patterns antennas, distribution
System radiated signals requirements for
DME
circuit, standard implementations
2) Analyze the interface between 4 Standing Wave Ratio (SWR),
power stage and the antenna radiated power
3) Analyze the most typical signal
errors due to the antenna
4 VSWR
7. Monitoring and 1) Describe and explain which 2 BITE, power, interrogation rates
Control Sub parameters are used for the
System monitoring
2) Check the operational status of 3 BITE, system status e.g.
the monitor system watchdog
3) Troubleshoot error indications 5 Readjust antenna systems,
replace faulty LRU
8. Implementation 1) Verify the impact of the 2 En route, terminal requirements
requirements on the location and
type of the ground station
procedures
2) Check the conformity of the
system to ITU
3 ITU regulation, ICAO Annex 10
3) Check the conformity to national
regulations
3 National regulations
9. On Board
Equipment
1) Describe the on board equipment 2 Antenna, receiver; (MMEL/RNP)
2) Describe the various HMI 2 CDI, RMI, HIS, ND, PFD
　
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