Communication Systems Flashcards
How to remember radio transmission bands
Very - Very Low
Lovely - Low
Maidens - Medium
Have - High
Very - Very High
Unusual - Ultra High
Social - Super High
Equipment - Extra High
What is the frequency range for the following band
Very Low
3 - 30 kHz
What is the frequency range for the following band
Low
30 - 300 kHz
What is the frequency range for the following band
Medium
303 - 3000 kHz
What is the frequency range for the following band
High
3 - 30 mHz
What is the frequency range for the following band
Very High
30 - 300 mHz
What is the frequency range for the following band
Ultra High
300 - 3000 mHz
What is the frequency range for the following band
Super High
3 - 30 gHz
What is the frequency range for the following band
Extra High
30 - 300 gHz
Very high frequency (VHF)
What are the following parameters;
1. MHz range
2. No. of channels
3. Channel spacing
- 118.000 MHz to 136.975 MHz
- 760 Channels
- 25 kHz channel spacing
8.33 kHz spacing used above FL245
What kHz channel spacing is used above FL245
8.33 kHz
What is the line of sight equation
1.23 x √ (alt of aircraft + alt of ground aerial)
What 3 things can cause issues with radio propagation
- Line of sight (space wave)
- Earths curvature
- High ground
What is the required range for ATSU Tower Frequencies
25nm
up to 4000 ft
What is the required range for ATSU Approach Frequencies
25nm
up to 10,000 ft
What is the required range for ATSU other airfields
Immediate area
up to 3000 ft
VHF radio propagation can be affected by ____, which is usually weather dependent
TROPOSPHERIC DUCTING
Where is the DOC for all radio stations found
AERONAUTICAL INFORMATION PUBLICATION
(AIP)
What are 4 functions that all radios must have
- On/Off
- Volume
- Squelch
- Frequency Selection
The term used when you hear your own voice when transmitting
SIDE TONE
COM stacks are usually numbered in what order
TOP to BOTTOM
COM 1
COM 2
COM 3
What frequency is used for aircraft radio communications
non translantic
VHF
