Glossary

Frame A basic timing interval in the system. For the Access channel, paging channel, and traffic channel, a frame is

20 ms long. For the sync channel, a frame is 26.666...ms long.

Frame Clocks A phase-locked loop in the CDMA Cellular Adapter that provides the following CDMA clocks for internal or external (through the rear-panel, 9-pin connector) use:

•2 second

•80 millisecond

•27 millisecond

•20 millisecond

Frame Delay Pulse An internal timing pulse that initiates the Cellular Adapter’s CDMA frame clocks. The frame delay pulse occurs after the frame delay timer expires.

Frame Delay Timer A timer that determines the interval between the sync pulse and the frame delay pulse.

Frame Error Rate (FER) A measure of the performance of a digital receiver. For a given data rate, the ratio of frames received incorrectly to the total number of frames sent. Also referred to as Frame Error Ratio.

Intermediate Frequency (IF) The frequency resulting from a downconversion process.

Mcps Megachips per second (one million chips per second).

Modulation Quality See Rho.

Modulation Symbol The output of the data modulator before spreading. On the reverse traffic channel, 64-ary orthogonal modulation is used and six code symbols are associated with one modulation symbol. On the forward traffic channel, each code symbol (when the data rate is 9600 bps) or each repeated code symbol (when the date rate is less than 9600 bps) is one modulation symbol.

No Noise spectral density. See Eb/No.

Offset Quadrature Phase Shift Keying (OQPSK) A form of modulation that applies different data sequences to two carriers separated by 90o. The two different data sequences are staggered by half a modulation symbol time. See Also Quadrature Phase Shift Keying.

Paging Channel A code channel on the forward channel used for paging mobile stations. Of the 64 Walsh functions used for channelization on the forward link, one through seven (inclusive) can be used for paging channels.

PCS see Personal Communications Services.

PCS Interface. The HP 83236B. Used to translate signals from the PCS band into the range of the Test Set and to provide a calibrated CDMA signal source.

79