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Definition
| The carrier frequency is _______ than the intelligence frequency. |
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Definition
| List the three parts of an AM envelope. |
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Term
| Constant Frequency, amplitude |
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Definition
| The two characteristics of an AM signal are _________ and ____________. |
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Term
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Definition
| ____________ occurs when the amplitude of the intelligence is higher than the carrier signal. |
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Term
| constant amplitude, frequency |
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Definition
| The two characteristics of an FM signal are __________ and ____________. |
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Term
| Emax - Emin / Emax + Emin x 100 |
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Definition
| What is the percentage of modulation formula? |
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Term
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Definition
| What two variables can determine the frequency of a tank circuit? |
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Term
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Definition
| What is the name of the oscillator circuit found in a transmitter? |
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Term
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Definition
| What component has the characteristics of a variable capacitor? |
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Term
Original RF signal
Local Oscillator
Sum of both
difference of both |
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Definition
| What are the output of the mixer circuit? |
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Term
LO Frequency
.455 MHz higher then the original frequency |
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Definition
| What is the normal output frequency of the local oscillator in an AM receiver? |
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Term
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Definition
| What circuit within the PLL drops the VCO frequency down in order to obtain a more stable frequency to compare? |
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Term
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Definition
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Term
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Definition
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Term
| Each side band holds the exact same intelligence but is 180 degrees out of phase from each other. |
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Definition
| What the difference of USB and LSB? |
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Term
| Amplitude remains the same |
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Definition
| What remains the same with FM signals? |
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Term
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Definition
| As the amplitude of the intelligence increases or decreases, it affects the ____________ ___________ of the carrier. |
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Term
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Definition
| As the frequency of the intelligence changes, it affects the __________ ___________ of the carrier/ |
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Term
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Definition
| When a capacitor and inductor are in parallel with each and used to generate a repetitive signal it is called what? |
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Term
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Definition
| When the tank circuit is given a charge and discharge it is called what? |
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Term
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Definition
| When both components have the equal energy storage values in a tank circuit it is called __________ . |
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Term
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Definition
| In a tank circuit the capacitor can be replaced with what to allow to be adjustable frequencies. |
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Term
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Definition
| The reference oscillator circuit uses what to tune in a very precise frequency? |
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Term
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Definition
| _______ utilizes a feedback system to ensure it is always at the proper frequency. |
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Term
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Definition
| The _____ will adjust the __________ voltage to correct the frequency of the VCO. |
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Term
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Definition
| Another type of oscillator that is commonly used in radios is the _____ ______. |
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Term
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Definition
| An oscillator commonly used to create a very precise frequency. |
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Term
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Definition
| What contains the same information as the original RF signal but at a lower frequency |
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Term
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Definition
| What is the input signal to the PLL on the output side of the VCO called? |
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Term
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Definition
Using the % of modulation formula figure the following.
Emax=60V
Emin= 20V |
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Term
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Definition
| what type of crystal does a crystal oscillator commonly use? |
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