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The amount by which the differential amplifier increases the
magnitude of the input signal is its a. input imp
b. resistance
c. filter
d. sens. - ANSWER-d. sens
What percentage of actual amplitude will be visible of 15hz
wave when using a HFF filter of 15hz a. 0.3
b. 0.5
c. 0.15
d. 0.7 - ANSWER-d. 0.7
A device that alters the amplitude of specific
frequencies of a signal a. transducer
b. conductor
c. filter
d. capacitor - ANSWER-c. filter
High data sampling rates in a digital EEG machine create? -
ANSWER-smooth
,connected
lines
Gradual changes in amplitude, frequency, or spatial distribution
of rhythms is known as;
a. attenuation
b. background activity
c. evolution
d asymmetry - ANSWER-c. evolution
Which mathematically converts the time function into a sine
wave of different
frequencies?
a. differential
amp
b. a/d
converter
c. fast fourier
transform
d. impedance meter - ANSWER-c. fast fourier
transform
Which of the following most closely relates to the ratio of an
amplifiers output to input signal?
a. impedance
b. CMRR
c. system gain
d. display sensitivity - ANSWER-c. system gain
,Which of the following settings is most
sensitive? a. 5 mv/cm
b. 2 uv/ mm
c. 5uv/ mm
d. 2 mv/cm - ANSWER-b. 2 uv/ mm
THe waveforms containfrequencies as high as 100 hz. what
is the nyquist
sampling
rate?
a. 25
samples/sec
b. >100 samples
/sec
c. 50 samples/
sec
d. > 200 samples /sec - ANSWER-d. > 200
samples/sec
Digital EEG montages are reformatted
by using a. referentially recorded data
b. the nyquist theorem
c. fourier analysis
d. system reference - ANSWER-d. system ref.
What happens when a 60 cycle sine wave is sampled
at 100hz? a. subharmonic response
b. overlap of data
c. digital filtering
, d. aliasing - ANSWER-d. aliasing
vertical
resolution: a.
duration
b. amplitude
c. frequencies
d. bits - ANSWER-b. amplitude
Input 1 voltage of +50 uv and input 2 a voltage of -100 uv. the
out put voltage
and deflection would be approximately - ANSWER-150
and downward
frequency
response curve;
A.
sens
b. input
impedance
c.
filters
d. duration -
ANSWER-c. filters
with high frequency filtering, muscle artifact may become
distorted and look