GLOSSARY
line drive an intermediate amplifier with normal amplification characteristics
video amplifier a wide ban amplifier that increases the video level to an
acceptable amplitude required by the following stage
attenuator introduces resistance in a circuit to reduce overall signal levels
fixed gain a certain resistance incorporated in a voltage path. With a stable
input voltage and the fixed resistance, the output voltage to the next stage will
always remain fixed at the required level
high sensitivity circuit an active attenuation circuit
low sensitivity circuit a passive attenuation circuit
preamplifier very stable, its main function is the creation of a very high signal
to noise ratio
sawtooth waveform gets its name from its resemblance to a sawblade, is used to
turn on an electronic device for a specific time period
CCU camera control unit located in the master control room, provides base
voltages, video processing, synchronization, and interfaces the camera head with
control room equipment
horizontal deflection deflects the electron beam within a cathode ray tube or a
pickup tube through the use of horizontal deflection coils that are driven by a
sawtooth waveform
retrace the return of the electron beam to the starting point in a cathode ray
tube after completion of all or a part of the scanning process (flyback)
height control used to vary the amplitude of the signal sent to the vertical
deflection section
dynamic transducer has a movable coil mounted in a magnetic field. Air pressure
causes the coil to vibrate within the magnetic field, thus causing an induced
voltage
interlaced scanning television scanning in which each frame is scanned in two
successive fields each consisting of all the odd or all the even horizontal lines.
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