Fechar
Purpose of a receiver?
3 Requirements of an effective receiver?
4 Receiver characteristics?
Expand and define RF?
Expand and define AF?
Expand and define IF?
What is heterodyning?
5 Types of filter?
How do you work out Rx bandwidth?
Define squelch?
Define modulation?
What is the modulating wave?
What is the carrier wave?
What is the modulated wave?
What is AM?
If the amplitude of the transmission stays the same it is said to have a..... envelope?
If the amplitude of the transmission varies in a repetitive manner it is said to have a...... envelope?
How would you work out AM transmission bandwidth?
How would you work out depth of modulation?
What is the result from a modulation value of over 100%?
What is a double sideband?
Speech frequency range is?
Describe an erect sideband?
Describe an inverted sideband?
3 DSB disadvantages?
What is a single sideband?
2 Disadvantages of SSB?
What is FM?
Define centre frequency?
Define frequency deviation?
What is carrier/frequency swing?
What is the deivation ratio?
What is the modulation index?
How would you work out FM bandwidth?
Expand and define FSK?
Define shift?
Define Excursion?
How would you work out FSK bandwidth?
Expand and define OOK?
Define telegraphic structure?
Define element?
Define mark and space?
What is a baud?
Expand and explain ETD?
How is ETD calculated?
Expand and explain the FKF
How is the FKF calculated?
How is OOK Tx BW calculated?
How is OOK Rx BW calculated?
Expand and explain MFSK?
2 Advantages of MFSK signalling?
2 Disadvantages of MFSK signalling?
What is the data rate?
Expand and explain MSK?
Expand and explain MFC?
How many levels can be common in MFC and why?
Common MFCs?
How can an MFC be recognised?
Expand and explain PM?
What is phase deviation?
Expand and explain PSK?
The drop from the major lobe to the minor lobe in PSK = ?
The drop from the major lobe to the minor lobe in MSK = ?
What is an initial phase reference?
Expand and explain DPSK?
Explain abolute PSK?
What is a polar plot?
Expand and explain BPSK?
Expand and explain QPSK?
Explain Eight PSK?
Expand and explain QAM?
Define amplitude ring?
Define signal states?
Define phase states?
Explain the V.29 modem
2 Benefits of QAM?
