Appendix B: Definitions - Nokia RH-17 Series Troubleshooting - Rf

RH-17
Troubleshooting — RF

APPENDIX B: Definitions

ACPR: Adjacent Channel Power Ratio. A ratio of power at an offset frequency as com-
pared to the power at the center frequency.
ADC: Analog to Digital Converter
AGC: Automatic Gain Control
AFC: Automatic Frequency Control
CW: Continuous Wave. This is a pure sine wave with no modulation such as CDMA or FM.
DAC: Digital to Analog Converter
dB: A power ratio. Formula is 10log(power1/power2). It is used to denote differences,
such as gain or loss. Power1 and power2 are in linear units such as W or mW.
dBm: A unit for an absolute power level. Formula is 10log(power in mW/1 mW).
LNA: Low Noise Amplifier
Page 60
Nokia Corporation
CCS Technical Documentation
Confidential Issue 1 04/2003