In the transmitter block diagram shown, the "oscillator"
-
is variable in frequency
-
generates an audio frequency tone during tests
-
Correct Answeruses a crystal for good frequency stability
-
may have a calibrated dial
This question does not yet have an explanation!
Register to add one
In the transmitter block diagram shown, the "balanced modulator"
-
balances the high and low frequencies in the audio signal
-
Correct Answerperforms double sideband suppressed carrier modulation
-
acts as a tone control
-
balances the standing wave ratio
This question does not yet have an explanation!
Register to add one
In the transmitter block diagram shown, the "filter"
-
removes mains hum from the audio signal
-
suppresses unwanted harmonics of the RF signal
-
Correct Answerremoves one sideband from the modulated signal
-
removes the carrier component from the modulated signal
This question does not yet have an explanation!
Register to add one
In the transmitter block diagram shown, the "mixer"
-
adds the correct proportion of carrier to the SSB signal
-
mixes the audio and RF signals in the correct proportions
-
Correct Answertranslates the SSB signal to the required frequency
-
mixes the two sidebands in the correct proportions
This question does not yet have an explanation!
Register to add one
In the transmitter block diagram shown, the "linear amplifier"
-
has all components arranged in-line
-
Correct Answeramplifies the modulated signal with no distortion
-
aligns the two sidebands correctly
-
removes any unwanted amplitude modulation from the signal
This question does not yet have an explanation!
Register to add one
In the transmitter block diagram shown, the "VFO" is
-
a voice frequency oscillator
-
a varactor fixed oscillator
-
a virtual faze oscillator
-
Correct Answera variable frequency oscillator
This question does not yet have an explanation!
Register to add one
In the transmitter block diagram shown, the "master oscillator" produces
-
Correct Answera steady signal at the required carrier frequency
-
a pulsating signal at the required carrier frequency
-
a 800 Hz signal to modulate the carrier
-
a modulated CW signal
This question does not yet have an explanation!
Register to add one
In the transmitter block diagram shown, the "driver buffer"
-
filters any sharp edges from the input signal
-
drives the power amplifier into saturation
-
Correct Answerprovides isolation between the oscillator and power amplifier
-
changes the frequency of the master oscillator signal
This question does not yet have an explanation!
Register to add one
In the transmitter block diagram shown, the "Morse key"
-
turns the DC power to the transmitter on and off
-
Correct Answerallows the oscillator signal to pass only when the key is depressed
-
changes the frequency of the transmitted signal when the key is depressed
-
adds an 800 Hz audio tone to the signal when the key is depressed
This question does not yet have an explanation!
Register to add one
In the transmitter block diagram shown, the "power amplifier"
-
Correct Answerneed not have linear characteristics
-
amplifies the bandwidth of its input signal
-
must be adjusted during key-up conditions
-
should be water-cooled
This question does not yet have an explanation!
Register to add one
In the transmitter block diagram shown, the "speech amplifier"
-
Correct Answeramplifies the audio signal from the microphone
-
is a spectral equalization entropy changer
-
amplifies only speech, while discriminating against background noises
-
shifts the frequency spectrum of the audio signal into the RF region
This question does not yet have an explanation!
Register to add one
In the transmitter block diagram shown, the "modulator"
-
is an amplitude modulator with feedback
-
is an SSB modulator with feedback
-
causes the speech waveform to gate the oscillator on and off
-
Correct Answercauses the speech waveform to shift the frequency of the oscillator
This question does not yet have an explanation!
Register to add one
In the transmitter block diagram shown, the "oscillator" is
-
an audio frequency oscillator
-
Correct Answera variable frequency RF oscillator
-
a beat frequency oscillator
-
a variable frequency audio oscillator
This question does not yet have an explanation!
Register to add one
In the transmitter block diagram shown, the "frequency multiplier"
-
translates the frequency of the modulated signal into the RF spectrum
-
changes the frequency of the speech signal
-
Correct Answerproduces a harmonic of the oscillator signal
-
multiplies the oscillator signal by the speech signal
This question does not yet have an explanation!
Register to add one
In the transmitter block diagram shown, the "power amplifier"
-
increases the voltage of the mains to drive the antenna
-
amplifies the audio frequency component of the signal
-
amplifies the selected sideband to a suitable level
-
Correct Answeramplifies the RF signal to a suitable level
This question does not yet have an explanation!
Register to add one