Service manual

STP 11-25R13-SM-TG
Glossary - 17
equalizing pulses
Pulses are one-half the width of the horizontal sync pulses which are transmitted at twice the rate of the
horizontal sync pulses during the portions of the vertical blanking interval immediately preceding and
following the vertical sync pulse. These pulses cause the vertical deflection to start at the same time in
each interval. They also keep the horizontal sweep circuits in step during the portions of the vertical-
blanking interval immediately preceding and following the vertical sync pulse
ethyl alcohol
A colorless volatile flammable liquid
eutectic
Referring to an alloy or solid solution that has the lowest possible melting point, usually below that of its
components. The most fusible series of alloys (e.g., 37/63 tin-lead alloy solder).
facsimile (FAX)
A process of scanning fixed graphic material and converting that information into signals.
fader
A control or group of controls for affecting fade-in and fade-out of video or audio signals.
field
One of the two (or more) equal parts of information into which a frame is divided in interlace scanning;
alternately, one half of a complete picture (or frame) interval, containing all of the odd, or all of the even
lines of the picture. A set of related characters that make up a piece of data. For instance, a field of
characters spelling a person's first name, a social security number field.
field blanking
Also called vertical blanking. This refers to the blanking signals at the end of each field that make the
vertical retrace invisible.
field frequency
The rate at which one complete field is scanned, normally 59.94 times a second in NTSC.
field-effect transistor (FET)
A voltage-operated transistor that requires very little input current and exhibits extremely high input
resistance.
filament (FIL)
A thin coil of wire that emits heat and light when an electric current passes through it.
flash
Momentary interference to the picture of a duration of approximately one field or less, and of sufficient
magnitude to totally distort the picture information.
flip-flop (FF)
A simple electronic circuit with two stable states. The circuit is changed from one state to the other by a
pulse or other signal.
floating ground
A reference ground that is not earthed. A reference point or voltage in a circuit that is not tied to an actual
external ground.
flutter
Describes a warbling, or change in pitch, of the sound in an audio recording/reproducing system.