Comms Flashcards
(21 cards)
What frequency has a periodic time of 10ms
100Hz
What is the wavelength of 60Hz
5M
What is the audio frequency range
300 Hz to 3 KHz
What are the characteristics of a series resonant circuit
Maximum current, minimum impedance
How would a series resonant circuit behave if frequency was reduced below fo
Like a capacitor
What us the Q factor ratio
How do you calculate wavelength
300000000/frequency
Audio frequency
300hz-3KHz
HF frequency
3MHz-30Mhz
VHF fequency
30Mhz-300Mhz
Marker frequency
75MHz
ADF frequency
200Khz-1750Khz
VOR frequency
111.95 Mhz-118Mhz
LOC frequency
108Mhz-111.95Mhz
Glideslope frequency
329.3Mhz-399.95Mhz
What does the selectivity of a resonant circuit depend on
The slope or steepness of the curve
What are resonant circuits used for
Selective amplification, muting or transformation of frequencies
What is the basic frequency determining element of an AM transmitter
The oscillator
What’s the main advantage of 2 out of 5 code
It’s instantaneous
Which part of ARINC429 is the check bit
32nd bit
What is AC voltage superimposition
When the AC voltages are all influenced in the same way
