0
Indirect FM generation first produces a narrow-band (relatively low bandwidth/frequency) FM wave, often created using an integrator, a signal multiplier, a phase shifter, and a summer. Then, it multiplies and mixes this wave's frequency properties to achieve the desired frequency deviation and carrier frequency.
Direct FM generation uses a voltage-controlled oscillator (VCO) to generate the wide-band FM signal directly. The VCO often consists of an oscillator with a variable capacitance or inductance that allows the resonant frequency to vary with the applied voltage.
Direct FM generation has poor frequency stability, so it requires feedback to stabilize this, which complicates the system. Indirect FM generation has good frequency stability, but is noisier since the noise is multiplied during the frequency multiplication.
Choosing one over the other depends on what components are available and how the importance of system/signal characteristics is weighted.
What else can I help you with?
What is the difference between indirect and direct measurement techniques?
Direct measurement techniques involve measuring a quantity directly, such as using a ruler to measure length. Indirect measurement techniques involve using other measurements or calculations to determine the quantity, such as using the Pythagorean theorem to find the height of a tree.
What renable energy is indirect?
Hydropower is considered an indirect form of renewable energy because it relies on the water cycle to generate electricity. Solar and wind power are examples of direct renewable energy sources that rely on their respective natural sources for power generation.
What is the difference between direct and indirect vision in science?
Direct vision involves seeing an object directly through observation, such as looking at cells under a microscope. Indirect vision involves using instruments like mirrors or lenses to view an object that cannot be seen directly, like examining the back of the eye with an ophthalmoscope.
Is Charles law indirect or direct?
Charles's Law is a direct relationship between the temperature and volume of a gas at constant pressure. This means that as the temperature of a gas increases, its volume also increases, and vice versa.
What are the differences between direct and indirect measurement methods, and how do they impact the accuracy of the results obtained?
Direct measurement methods involve obtaining data through direct observation or physical measurement, while indirect measurement methods involve using other data or calculations to estimate the desired quantity. Direct methods are typically more accurate as they involve measuring the actual quantity of interest, while indirect methods may introduce errors due to assumptions or estimations. The choice of method can impact the accuracy of results obtained, with direct methods generally providing more precise and reliable measurements.
Difference between direct and indirect address instruction?
the different between direct and indirect adress instruction
Differentiate between direct marketing and indirect marketing?
The difference between direct marketing and indirect marketing.
What is the difference between indirect and direct quote life insurance?
The difference between indirect and direct quote life insurance is that the insurance level will differ. Direct is when someone dies, indirect involves other factors.
What is the difference between direct and indirect supervisor?
The difference between direct and indirect supervisor is the presence of the supervisor. Direct supervision means a supervisor is psychically present. Indirect supervision means doing work without the physical presence of the supervisor.
What is the difference between direct and indirect correlation in statistics?
GJVG
What is the difference between direct tax and non-direct tax?
difference b/w direct tax and indirect tax
What is the difference between the direct and indirect methods of determining generation time with a growth curve?
In the direct method, the cells are enumerated by determining colony-forming units on a Petri dish; in the indirect method, the cell numbers are approximated using a spectrophotometer.
What is the difference between a direct and indirect hernia?
if hernia tissu pass thrw ing.ring that is indirect ing.hernia.if it is pass thrw abdominal wall that is direct ing.herniaif hernia tissu pass thrw ing.ring that is indirect ing.hernia.if it is pass thrw abdominal wall that is direct ing.herniathe difference between direct hernia and indirect hernia is the direct hernia only affected the superficial inguinal ring and the indirect is affected the deep inguinal ringthe difference between direct hernia and indirect hernia is the direct hernia only affected the superficial inguinal ring and the indirect is affected the deep inguinal ring
What is the difference between direct expense and indirect expense in financial account?
give the full chart of the direct and indirect expenses . detail about this
The difference between direct taxs and indirect taxs and give examples of each?
The difference between direct taxes and indirect taxes with examples is that direct taxes come directly from a person's income or personal property taxes. Indirect taxes comes from sales and excise taxes.
Difference between direct cost and indirect cost?
direct cost has direct relation with product manufacturing while indirect cost not and not identifiable with cost as well.
Difference between indirect and direct blood pressure?
one is direct the other one isn't
