dB - Decibel

dBm - Decibels referenced to one milliwatt

dBmV - Decibels referenced to one millivolt

dBµV - Decibels referenced to one microvolt

Delta V/A - Delta Video to Audio -- Calculated by subtracting the (first if DUAL) audio carrier level from the video carrier level (for analog TV and DUAL type channels only)

DOCSIS - Data Over Cable Service Interface Specification (DOCSIS is a trademark or registered trademark of CableLabs in the United States and/or other countries.)

EVM - Error Vector Magnitude

Headroom (also called Overhead or Margin) - The number of decibels (dB) by which a measurement exceeds the minimum defined requirements. The benefit of headroom is that it reduces the bit-error rate (BER), and provides a performance 'safety net' to help ensure that current and future high speed applications will run at peak accuracy, efficiency and throughput regardless of seasonal temperature changes on the HFC distribution system.

kHz - Kilohertz

MER - Modulation Error Ratio

MHz - Megahertz

QAM - Quadrature Amplitude Modulation

QPSK - Quadrature Phase Shift Keying