Glossary
Code Domain Analyzer An instrument that measures individual Walsh Channel characteristics in a CDMA channel. The Cellular Adapter can display all 64 Walsh Channels in a received signal and display their power, phase, and timing relationship.
Code Domain Phase A measurement mode that provides the relative phase relationship between various Walsh Channels and the Pilot Channel.
Code Domain Power A measurement mode that presents the signal strength of the Walsh Channels in a CDMA signal. It indicates the division of the total power in the channel as shared by the Pilot, Sync, Paging, and Traffic channels.
Code Domain Timing A measurement mode that indicates the relative timing relationship between various Walsh Channels and the Pilot Channel.
Data Block The sampled and quantized record of a portion of the IF waveform at the input to the DSP analyzer. The data block’s length is determined by the Interval field on the CDMA ANALYZER screen.
dBm/Hz A measure of power spectral density. dBm/Hz is the power in one Hertz of bandwidth, where power is expressed in units of dBm.
dBW A measure of power expressed in terms of its ratio (in dB) to one Watt.
Downconverter An RF network using a local oscillator to translate an input signal to a lower (intermediate) frequency.
Downlink See Forward Link.
Eb The energy in an information bit.
Eb/N0 The ratio between the energy of each information bit (Eb) and the noise spectral density (No). This ratio is usually expressed in dB.
FER See Frame Error Rate.
FIR Filter Finite Impulse Response filter. A filter for which the output, in response to an impulse input, totally dies away after a finite time interval. The term is usually used in reference to a digital filter.
Forward CDMA Channel A CDMA channel from a base station to mobile stations. The forward CDMA channel contains one or more code channels that are transmitted on a CDMA frequency assignment using a particular pilot PN offset. The code channels are associated with the pilot channel, sync channel, paging channels, and traffic channels. The forward CDMA channel always carries a pilot channel and may carry up to 1 sync channel, up to 7 paging channels, and up to 63 traffic channels, as long as the total number of channels, including the pilot channel, is no greater than 64.
Forward Link The link direction from the base station to the mobile station. Also referred to as the downlink.
Forward Traffic Channel A code channel used to transport primary traffic, secondary traffic, and signaling traffic from the base station to the mobile station.
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