Lecture 3 Flashcards
Transmit/recieve switch
Involve transmission channel and reception channel
Prevents incorrect direction of signal
Acts as a traffic cop
Which beam is stronger, the beam sent out or the echo that comes back
The beam sent out
Are the amplifiers normally receiving a strong signal or a weak one
Weak one
Why is it importnatnt that the reciever recieves a weak signal
A stronger voltafe from the pulser/ pulse delays results in overload of the amplifier
Transmit/recieve switch thus protects
The amplifiers from the outgoing voltage
Returning echo is a ____ wave
Mechanical
At the transducer the mechanical wave is converted to
Electrical signal
The electrical signal converted in th e transducer travels to
The amplifiers
Amplifiers (power) ratio
Amplified output power/ input electrical power
Power ratio =
GAIN (dB)
Or
Output/input = gain
Applification is opposite of
Attenuation
What are amplifiers used for
To counteract our attenuation
What setting on our machine are amplifiers involved with
Gain/TGC
Each channel has
An amp that amplifies the voltage
Voltage ratio
(Output/input)^2 = Power ratio
