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Which of these cause excessive bandwidth in an AM transmitter?
An audio bandwidth that is too wide
Running high power
Poorly adjusted low pass filters
Drift of the carrier oscillator caused by the build up of heat.
An FM receiver on 2m has a 12.5kHz bandwidth and 12.5kHz channel spacing. What bandwidth would a station on an adjacent channel have to have to cause interference
2.5kHz
5kHz
10kHz
15kHz
Which of these frequencies could be a harmonic of an 8MHz oscillator?
25MHz
64MHz
72MHz
97MHz
Which of these filters would be most useful for reducing the harmonic content of a transmitter
A notch filter
A crystal filter
A high pass filter
A low pass filter
To remove key clicks from a CW transmitter a filter is created around the key. This has the effect of:
increasing the rise time of a dot or dash
decreasing the rise time of a dot or dash
increasing the rise time of a dot or dash and increasing the fall time
decreasing the rise time of a dot or dash and decreasing the fall time