0
Because the output circuits of the modulator would otherwise present an impedance
to the RF amplifier in parallel with the transmission line and antenna system, which
you don't want. In other words, you want the RF all going up the tower, not down to
ground through the modulator.
What else can I help you with?
In frequency modulation what happens to the bandwidth when you increase the modulating frequency?
Bandwidth increases as a function of both modulating frequencyand deviation. As deviation increases, pairs of sidebands are generated, each equal to fc+m and fc-m, fc+2m, fc-2m etc. where fc = the carrier frequency and m = the modulating frequency. Increasing modulation (frequency deviation) will change the level of each of the sideband pairs - and the carrier, which at times falls to zero.
What is the function of the inductor in a fluorescent tube light circuit?
Without an inductor in series with the tube, the plasma in the tube would simply short-out the service wires. That would always cause the circuit's protective fuse to blow - or its circuit breaker to trip - to cut off the supply of current to the tube. If that happened the tube light would never be able to perform its intended purpose, which is to continue running - and giving out a continuous light - for long periods of time.So a high-inductance choke must be used in circuit with the starter and the tube for two reasons:firstly the choke generates a high voltage pulse across the tube when the starter's contacts open. That pulse causes the gas in the tube to ionise and become a low-resistance plasma andsecondly, because it is wired in series with the tube, the choke greatly reduces the current drawn by the tube once it contains the low-resistance plasma.The starter is a special kind of switch: its contacts are made of a metal alloy which heats up and bends soon after a voltage is applied, causing the switch contacts to open.
Why short circuit calculation is not required for LT cables?
Lt cables has own impedance which reduce the short circuit fault level
Schematic circuit of automatic water level controller?
block diagram
What is the function of a voltmeter in an electrical circuit?
To measure Voltage which is the force pushing current :)
Can you choke by ozone?
Ozone can choke us. It acts as a problem at ground level.
How can I use a Johnson noise calculator to determine the level of noise in a circuit?
To determine the level of noise in a circuit using a Johnson noise calculator, you need to input the resistance and temperature of the circuit into the calculator. The calculator will then provide you with the Johnson noise voltage, which represents the level of noise in the circuit.
Will a bad fuel sending unit on a 2001 Isuzu Rodeo cause the check engine light to come on?
Sure you could get one of these*P0460 Fuel Level Sensor Circuit Malfunction*P0461 Fuel Level Sensor Circuit Range/Performance*P0462 Fuel Level Sensor Circuit Low Input*P0463 Fuel Level Sensor Circuit High Input*P0464 Fuel Level Sensor Circuit Intermittent
In frequency modulation what happens to the bandwidth when you increase the modulating frequency?
Bandwidth increases as a function of both modulating frequencyand deviation. As deviation increases, pairs of sidebands are generated, each equal to fc+m and fc-m, fc+2m, fc-2m etc. where fc = the carrier frequency and m = the modulating frequency. Increasing modulation (frequency deviation) will change the level of each of the sideband pairs - and the carrier, which at times falls to zero.
In which ways is a water circuit similar to an electrical circuit?
Water always flow from height to bottom mean high potential level to low potential level same happens in electrical circuit.
How does the circuit of a collector modulation work?
The output stage of the transmitter is a high power frequency class C amplifier. Class C amplifiers conduct for only a portion of the positive half cycle of their input signal. The collector current pulses cause the tuned circuit to oscillate or ring at the desired output frequency. The tuned circuit, therefore, reproduces the negative portion of the carrier signal. The modulator is a linear power amplifier that takes the low level modulating signal and amplifies it to a high power level. The modulating output signal is coupled through modulation transformer T1 to the class C amplifier. The secondary winding of the modulation transformer is connected in series with the collector supply voltage Vcc of the class C amplifier. Read more: [http://www.daenotes.com/electronics/communication-system/am-modulators#ixzz2R69fAPRC http://www.daenotes.com/electronics/communication-system/am-modulators#ixzz2R69fAPRC]
Which court is known as the Court of Appeals The supreme or district or circuit?
The circuit level courts. E.g., "The Seventh Circuit Court of Appeals"
What is the purpose of the elometer and how does it measure the level of electricity in a circuit?
The purpose of an elometer is to measure the level of electricity in a circuit. It does this by using a sensor to detect the flow of electric current through the circuit and then displaying the measurement on a screen or dial.
What level does man choke evolve in Pokemon emerald?
machoke evolves in any game when you trade it. it then becomes a machamp
Where must All processing at the circuit level going up to the perceptual level must synapse in?
thalamus
What is the function of the inductor in a fluorescent tube light circuit?
Without an inductor in series with the tube, the plasma in the tube would simply short-out the service wires. That would always cause the circuit's protective fuse to blow - or its circuit breaker to trip - to cut off the supply of current to the tube. If that happened the tube light would never be able to perform its intended purpose, which is to continue running - and giving out a continuous light - for long periods of time.So a high-inductance choke must be used in circuit with the starter and the tube for two reasons:firstly the choke generates a high voltage pulse across the tube when the starter's contacts open. That pulse causes the gas in the tube to ionise and become a low-resistance plasma andsecondly, because it is wired in series with the tube, the choke greatly reduces the current drawn by the tube once it contains the low-resistance plasma.The starter is a special kind of switch: its contacts are made of a metal alloy which heats up and bends soon after a voltage is applied, causing the switch contacts to open.
What is meant by tolerance of any circuit component?
acceptable error level
