A-005-07: Signal processing - AF, IF, and RF
A-005-07-01:
Maintaining the peak RF output of a SSB transmitter at a relatively constant level requires a circuit called the:
automatic level control (ALC)
automatic gain control (AGC)
automatic output control (AOC)
automatic volume control (AVC)
A-005-07-02:
Speech compression associated with SSB transmission implies:
full amplification of low level signals and reducing or eliminating amplification of high level signals
full amplification of high level signals and reducing or eliminating amplification of low level signals
a lower signal-to-noise ratio
circuit level instability
A-005-07-03:
Which of the following functions IS NOT included in a typical digital signal processor?
Aliasing amplifier
Analog to digital converter
Digital to analog converter
Mathematical transform
A-005-07-04:
How many bits are required to provide 256 discrete levels, or a ratio of 256:1?
8 bits
6 bits
16 bits
4 bits
A-005-07-05:
Adding one bit to the word length, is equivalent to adding ____ dB to the dynamic range of the digitizer:
6 dB
1 dB
4 dB
3 dB
A-005-07-06:
What do you call the circuit which employs an analog to digital converter, a mathematical transform, a digital to analog converter and a low pass filter?
Digital signal processor
Digital formatter
Mathematical transformer
Digital transformer
A-005-07-07:
Which principle IS NOT associated with analog signal processing?
frequency division
compression
bandwidth limiting
clipping
A-005-07-08:
Which of the following IS NOT a method used for peak limiting, in a signal processor?
frequency clipping
RF clipping
compression
AF clipping
A-005-07-09:
What is the undesirable result of AF clipping in a speech processor?
Increased harmonic distortion
Reduced average power
Increased average power
Reduction in peak amplitude
A-005-07-10:
Which description IS NOT correct? You are planning to build a speech processor for your transceiver. Compared to AF clipping, RF clipping:
is easier to implement
has less distortion
is more expensive to implement
is more difficult to implement
A-005-07-11:
Automatic Level Control (ALC) is another name for:
RF compression
AF compression
RF clipping
AF clipping
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