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OTA DTv Abbreviations

Common abbreviations used in the broadcast and other industry's

Abbrev - Description

- approximately
± - plus or minus
> - greater than
- greater than or equal to
< - less than
- less than or equal to
β - Beamwidth (Greek letter Beta)
Ω - ohms (impedance)
° - Degrees (angle or temperature)
°C - Degrees Celsius
°F - Degrees Fahrerhigh
°K - Degrees Kelvin

AGL - Above Ground Level
Al - aluminum
AM - Amplitude Modulation
Ant - Antenna
ATSC - Advanced Television System Committee (digital TV standard)
AWG - American Wire Gauge

B - receiver noise bandwidth in Hertz.

CA - Class A (low power broadcast)
CD - Class A Digital (low power broadcast)
Ch - channel
Cu - copper

D - Digital Class A (low power broadcast)
dB - decibels power difference (base 10 logarithmic scale)
dBD - antenna gain: decibels with respect to a standard half wave dipole antenna with a gain of 2.15 dBi.
dBi - antenna gain: decibels with respect to a lossless isotropic radiator.
dBm - power decibels above or below 1 milliwatt (0.001 Watts)
dBW - power decibels above or below 1 watt
DT - Digital Television full power class
DTv - Digital Television
DVD - Digital Video Disc or Digital Versatile Disc

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ERP - Effective Radiated Power

FCC - Federal Communications System
FM - Frequency Modulation
fps - frames per second
Freq - Frequency
ft - feet

GPS - Global Positioning System

HD - High Definition
HDTV - High Definition Television
HDMI - High Definition Multimedia Interface (Video Data Communication)
Hz - Hertz (Cycles per Second)

in - inch
in2 - square inches

k - Boltzmann's Constant = 1.380 622 x 10-23 Watt*sec/°K.
km - kilometers (1000 meters)
kW - kilowatts (1000 Watts)

Lat - Latitude
Lng - Longitude
LD - low power digital (broadcast)
LP - low power (broadcast)

m - meters
mi - miles
mm - millimeter (0.001 Meters)
mW - milliwatts (0.001 Watts)
MHz - megahertz (1,000,000 Hertz)
MSL - Mean (average) Sea Level

NEC - National Electrical Code
NF - receiver noise figure (receiver noise)
NOAA - National Oceanic and Atmospheric Administration
NTSC - National Television System Committee (analog TV standard)

OTA - Over-the-Air

PPI - pixels per inch (Resolution)
Pwr - Power

RG - Radio Guide (coax cable designation)
RF - Radio Frequency
RV - Recreational Vehicle

S/N - Signal-to-Noise ratio
SD - Standard Definition (Resolution)
sec - seconds

T - temperature
TV - Television full power class

UHD - Ultra High Definition (Resolution)
UHF - Ultra High Frequency (300 - 3000 MHz)
µW - microwatts (0.000 001 Watts)

Vac - Alternating Current RMS (Root Mean Square) Voltage.
VCR - Video Cassette Recorder
VGA - Video Graphics Array (video data communication)
VHF - Very High Frequency (30 - 300 MHz)
VSWR - Voltage Standing Wave Ratio (a measure of unwanted signal reflections)

W - Watts (power)

xmit - Transmit

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Abbreviations