LG LG-UD90c, Руководство по обслуживанию

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LG-KG90C
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DBc. The ratio(in dB) of the sideband power of a signal, measured in a given bandwidth at a given
frequency offset from the center frequency of the same signal, to the total inband power of the signal.
For CDMA, the total inband power of the signal is measured in a 1.23MHz bandwidth around the
center frequency of the CDMA signal.
DBm . A measure of power expressed in terms of its ration (in dB) to one milliwatt.
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 terns of its ration (in dB) to one Watt.
Dedicated Control Channel. An analog conrtol channel used for the transmisson of digital control
information from either a base station or a mobile station.
Deinterleaving. The process of unpermuting the symbols that were permuted by the interleaver..
Deinterleavering is performed on reveived symbols prior to decoding.
Digital Color Code(DCC). A digital signal transmitted by a base station on a forward analog control
channel that is used to detect capture of a base station by an interfering mobile station.
Dim-and-Burst . A frame in which primary traffic is multiplexed with either secondary traffic or
signaling traffic.
Discontinuous Transmission (DTX) . A mode of operation in which a mobile station transmitter
autonomously switches between two transmitter power levels while the mobile station is in the
conversation state on an analog voice channel.
Distance-Based Registration . An autonomous registration method in which the mobile station
registers whenever it enters a cell whose distance from the cell in which the mobile station last
registered exceeds a given threshold.
DTMF. See Dual Tone Multifrequency.
Dual-Tone Multifrequency(DTMF). Signaling by the simultaneous transmission of two tones, one
from a group of low frequencies and another from a group of high frequencies. Each group of
frequecies consists of four frequencies.
Eb. The energy of an information bit.
Ec/I0. The ratio in (dB) between the pilot energy accumulated over one PN chip period(Ec) to the
power spectral density in the received bandwidth(Io).
Effective Radiated Power (ERP). The transmitted power multiplied by the antenna gain referenced
to a half wave dipole.
Electronic Serial Number(ESN) . A 32-bit number assigned by the mobile station manufacturer,
uniquely identifying the mobile station equipment.
Encoder Tail Bits . A fixed sequence of bits added to the end of a block of data to reset the
convolutional encoder to a known state.
ERP. See Effective Radiated Power.
ESN. See Electronic Serial Number.
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