logo

Crowdly

Browser

Додати до Chrome

Questions Bank (1399230 total)

Pour réaliser la plaquette de présentation du club de remise en forme

dans lequel je travaille je peux utiliser n'importe quelle image issue

d'internet.

0%
100%
Переглянути це питання

   Calculate

the transfer function gain, |

H(f)|, of a series RC circuit at f0

=20Hz,

given

R=200 Ω and C=0.0001 F.

[Note:  H(f) = 1 / 1+j(f / B) , B = 1 / 2πRC ]

0%
0%
0%
0%
Переглянути це питання

  In

a Frequency division Multiplexing system having four frequency bands,

if the frequency bands are of 200 kHz bandwidth

separated by 15kHz guard bands, calculate the minimum capacity of the

communication channel.

0%
0%
0%
0%
Переглянути це питання

  

A

message signal with a peak voltage of 40 mV at a frequency of 600 Hz is applied

to an FM generator circuit.  If the

circuit has frequency sensitivity,

Kf

= 800 Hz /20mV,

calculate the peak frequency deviation.

0%
0%
0%
0%
Переглянути це питання

   What

is the significance of the frequency sensitivity factor,

Kf and what is its units?

0%
0%
0%
0%
Переглянути це питання

  Why

is it important to know the peak deviation constant,

Δf, in modulation?

100%
0%
0%
0%
Переглянути це питання

   Consider

a signal that has its highest frequency component at 8,000 Hz. What is the

minimum rate that the signal should be sampled by?

0%
0%
0%
0%
Переглянути це питання

   What

is the method with which a baseband signal can be transported to RF

frequencies?

0%
0%
0%
0%
Переглянути це питання

   In

envelope detection of an amplitude-modulated signal, what is the danger of

making the lowpass filters’ cutoff frequency too high a value?

0%
0%
0%
0%
Переглянути це питання

  How

is normalised frequency defined?

0%
0%
0%
0%
Переглянути це питання