1
Q
Why is minimum shift keying (msk)?
A
FSK transmission that has a Baud speed exactly twice the value of the shift employed.
2
Q
What does the SMI produce ?
A
A very distinct shape which is very efficient.
3
Q
3 ways of identifying an MSK …
A
SMI is 0.5
1 side lobe will fit in the major lobe 3 times.
The decibel drop from the major lobe to the top of the minor lobe is around about -23.7 dB
4
Q
Other identifying features of an MSK?
A
The width of the major lobe is equal to 1.5 x the keying rate (Baud).
The width of the major lobe divided by 3 = the shift.
The width of the minor lobe = shift
Shift x2 is equal to modulation rate
5
Q
How do we work out the null to null bandwidth?
A
3x the minor lobe.
6
Q
How do you work out SMI?
A
Bauds
TO3
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