quiz sa eective

superheterodyne receiver

A RECEIVER ARCHITECTURE THAT CONVERTS AN INCOMING RF SIGNAL TO A FIXED INTERMEDIATE FREQUENCY BEFORE DEMODULATION IS CALLED A _________.

The image moves farther away from the desired signal.

WHY DOES INCREASING THE IF GENERALLY MAKE IMAGE-CHANNEL REJECTION EASIER?

automatic gain control

THE RECEIVER SYSTEM THAT AUTOMATICALLY CHANGES RECEIVER GAIN ACCORDING TO THE STRENGTH OF THE iNCOMING SIGNAL IS CALLED __________.

mixer

CIRCUIT IN A SUPERHETERODYNE RECEIVER THAT COMBINES THE INCOMING RF SIGNAL AND THE LOCAL OSCILLATOR SIGNAL IS THE __________.

image frequency

AN UNWANTED RF SIGNAL THAT PRODUCES THE SAME IF AS THE DESIRED SIGNAL WHEN MIXED WITH THE LOCAL OSCILLATOR IS CALLED THE __________.

DOUBLE SUPERHETERODYNE RECEIVER

A RECEIVER THAT USES TWO SEPARATE INTERMEDIATE FREQUENCIES IS KNOWN AS A __________

VOLTAGE-CONTROLLED OSCILLATOR

THE OSCILLATOR IN A PLL WHOSE FREQUENCY iS CONTROLLED BY AN APPLIED VOLTAGE IS CALLED THE __________.

adjust the vco frequency

IF THE VCO FREQUENCY DIFFERS FROM THE REFERENCE FREQUENCY, THE PLL PRODUCES AN ERROR SIGNAL THAT ULTIMATELY:

CAPTURE RANGE.

THE FREQUENCY RANGE OVER WHICH A PLL CAN ACHIEVE A LOCKED CONDITION IS CALLED THE __________.

very high frequency

THE FREQUENCY BAND THAT HAS A WAVELENGTH OF 1000mm TO 0.01 km IS CALLED

line-of-sight propagation

THE PROPAGATION METHOD THAT PRIMARILY LIMITS VHF AIRCRAFT COMMUNICATION TO THE VISIBLE/HORIZON REGION IS CALLED __________.

carrier, usb, lsb

IN CONVENTIONAL AVIATION AM/DSB, THE THREE PRINCIPAL COMPONENTS ARE THE _________, __________,

AND __________.

modulation

THE PROCESS OF PUTTING INFORMATION ONTO A CARRIER SIGNAL BY CHANGING ONE OF THE CARRIER'S CHARACTERISTICS IS CALLED __________.

modulating index

THE RATIO OF THE MODULATING SIGNAL AMPLITUDE TO THE CARRIER AMPLITUDE IS CALLED THE __________.

aircraft communications addressing and reporting system

THE AVIATION DIGITAL COMMUNICATION SYSTEM USED TO EXCHANGE OPERATIONAL AND ADMINISTRATIVE INFORMATION BETWEEN AIRCRAFT AND GROUND FACILITIES IS CALLED __________.