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Analog radio receiver signal compression:
reduces the high frequency received signal amplitude
Coaxial cable line losses at RF frequencies are due to:
wire resistance, capacitive and inductive reactance
You are troubleshooting audio reproduction equipment and measure the
signal to be input into the audio amplifier. What approximate RMS level
would you expect the signal to be?
1000 millivolts
The noise level in a radio receiver is generated mostly in the:
RF section
,The fast charging rate for a NiCad of Ni-Mh battery should not exceed:
10% of its AHr or ampere hour rating
Which of the following in a PC would be part of disk operations?
SATA or IDE controller
An LED
can be used as a fiber optic signal source
A dual trace oscilloscope may have
A Z input for intensity modulation
The gain of an op-amp connected as an inverting amplifier is determined by
the external
feedback and input resistors
Which propagation condition would be significant for a UHF signal to be
received at a distance of 500 miles?
Tropospheric ducting
A three input NAND has two low inputs and one high input. The output is:
,High
Which of these would be considered a component of a "basic" power supply?
diode rectifier
A "Video Signal" is defined as:
baseband including visual information
You are servicing a power supply and have disconnected power. It has
several 250 uf capacitors connected in parallel. To avoid shock these
capacitors:
Should be discharged to chassis ground, through a suitable resistor
A schematic used in electronic:
is much like a road map for following signals
High voltage should be discharged before servicing a product. After disabling
AC input power, discharge a high voltage power source by:
draining thru a large value resistor to chassis ground
Which of these would be an important electrical consideration in the use of a
transformer?
, The operating frequency
If a 12v product is dissipating 50w, how much load resistance does the
device represent?
2.9 ohms
An "audio signal" is defined as:
frequencies in the 20Hz to 15000Hz range
What will cause a generator to produce DC voltage rather then AC?
the commutator
You suspect the unit has an internal short. To prevent further damage when
you apply power, you should:
insert a low resistance high wattage(100ohm, 10w) resistor in series with the
power input.
A ripple counter:
Is two or more logical flip-flops connected sequentially with the input pulses
toggling the first one
When voltage is applied to a capacitor: