Radio Basics Flashcards
What is the saying to remember the radio transmission ranges
V L M H V U S E
Very
Lonely
Maidens
Have
Very
Unusual
Social
Etiquette
Frequency range
Very Low
V L M H V U S E
3 - 30kHz
Frequency range
Low
V L M H V U S E
30 - 300kHz
Frequency range
Medium
V L M H V U S E
300 - 3000kHz
Frequency range
High
V L M H V U S E
3 - 30MHz
Frequency range
Very High
V L M H V U S E
30 - 300MHz
Frequency range
Ultra High
V L M H V U S E
300 - 3000MHz
Frequency range
Super High
V L M H V U S E
3 - 30GHz
Frequency range
Extra High
V L M H V U S E
30 - 300 GHz
What is the frequency band and range for very high frequency navigation aids
VOR/ILS/DME
108.000 MHz
to
117.950 MHz
What does DME stand for
DISTANCE MEASURING EQUIPMENT
What does NDB stand for
NON DIRECTIONAL BEACON
Why does an NDB suffer interference errors at night
IONISATION LAYERS FALL
Why does an NDB suffer interference errors near the coast
COASTAL REFRACTION
Surface waves crossing a cost refract, leading to indication errors
What causes quadrantal NDB interference error
METAL AIRCRAFT COMPONENTS
Act as an aerial, misdirecting the signal
Airborne receivers (ADF) use ____ aerials at ____॰.
What error can occur
- 2 aerials
- 90॰
- Dip (bank) error
What are 3 issues that can impact radio propagation in flight for VHF/UHF
- Line of sight (space wave)
- Earths curvature
- High ground
What is the equation to determine line of sight of a mast or ground aerial
1.23 x √ (aircraft altitude + mast altitude)
1.23 x √ (sum of) altitude of transmitter and receiver
Which CAA publication declares the VHF range calculation, which specifically defines to use 1.23 and NOT 1.25
CAP 452
Each navigation aid has a DOC. What does DOC stand for
DESIGNED OPERATIONAL COVERAGE
Each navigation aid has a DOC
What publication and section can a DOC be found
Aeronautical Information Publication (AIP)
ENR 4-1-1-1
