A-005-04: AM, single sideband, linearity, two-tone test
A-005-04-01:
What type of signal does a balanced modulator produce?
Double sideband, suppressed carrier
FM with balanced deviation
Full carrier
Single sideband, suppressed carrier
A-005-04-02:
How can a single-sideband phone signal be produced?
By using a balanced modulator followed by a filter
By driving a product detector with a DSB signal
By using a loop modulator followed by a mixer
By using a reactance modulator followed by a mixer
A-005-04-03:
Carrier suppression in a single-sideband transmitter takes place in:
the balanced modulator stage
the carrier decouple stage
the mechanical filter
the frequency multiplier stage
A-005-04-04:
Transmission with SSB, as compared to conventional AM transmission, results in:
6 dB gain in the transmitter and 3 dB gain in the receiver
6 dB gain in the receiver
a greater bandpass requirement in the receiver
3 db gain in the transmitter
A-005-04-05:
The peak power output of a single-sideband transmitter, when being tested by a two-tone generator is:
twice the RF power output of any of the tones
equal to the RF peak output power of any of the tones
one-half of the RF peak output power of any of the tones
one-quarter of the RF peak output power of any of the tones
A-005-04-06:
What kind of input signal is used to test the amplitude linearity of a single-sideband phone transmitter while viewing the output on an oscilloscope?
Two audio-frequency sine waves
An audio-frequency sine wave
An audio-frequency square wave
Normal speech
A-005-04-07:
When testing the amplitude linearity of a single-sideband transmitter, what audio tones are fed into the microphone input and on what kind of kind of instrument is the output observed?
Two non-harmonically related tones are fed in, and the output is observed on an oscilloscope
Two harmonically related tones are fed in, and the output is observed on an oscilloscope
Two harmonically related tones are fed in, and the output is observed on a distortion analyzer
Two non-harmonically related tones are fed in, and the output is observed on a distortion analyzer
A-005-04-08:
What audio frequencies are used in a two-tone test of the linearity of a single-sideband phone transmitter?
Any two audio tones may be used, but they must be within the transmitter audio passband, and should not be harmonically related
20 Hz and 20 kHz tones must be used
1200 Hz and 2400 Hz tones must be used
Any two audio tones may be used, but they must be within the transmitter audio passband, and must be harmonically related
A-005-04-09:
What measurement can be made of a single-sideband phone transmitter's amplifier by performing a two-tone test using an oscilloscope?
Its linearity
Its frequency deviation
Its percent of carrier phase shift
Its percent of frequency modulation
A-005-04-10:
How much is the carrier suppressed below peak output power in a single-sideband phone transmission?
At least 40 dB
No more than 20 dB
No more than 30 dB
At least 60 dB
A-005-04-11:
What is meant by flattopping in a single-sideband phone transmission?
Signal distortion caused by excessive drive
Signal distortion caused by insufficient collector current
The transmitter's automatic level control is properly adjusted
The transmitter's carrier is properly suppressed
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