Abstract: A technique substantially reduces power consumption of a selective call radio (106) while the selective call radio (106) is in an inactivated state. During the inactivated state a power state of the selective call radio (106) is cycled at an inactivated duty cycle and a first selective call message having a selective call address of the selective call radio (106) is received and processed. An activation mode of the selective call radio (106) is set to an activated state during which the power state of the selective call radio (106) is cycled at an activated duty cycle. The activated duty cycle is substantially greater than the inactivated duty cycle. The activation mode of the selective call radio is set to the activated state in response to an activation command generated during the inactivated state.

Abstract: A radio transmitter (103) transmits a cycle (320) including a digital portion (330) generated by frequency modulating a radio carrier with a digital signal and an analog portion (440) generated by amplitude modulating a radio carrier with an analog signal. A selective call radio (106) frequency demodulates the digital signal; amplitude demodulates the analog signal; decodes a message address (510); generates a quality signal indication (643) while a quality assessment signal (420) is being received; processes an information signal (550) in response to a message received signal (641); records at least one measurement of the quality assessment signal (420) during the quality signal indication (643); determines a signal quality level of the information signal (550) from the at least one measurement of the quality assessment signal (420); and generates a sensible alert in response to the signal quality level.

Abstract: A selective call radio (100) includes a receiver section (103), an address detector (210), a power off command detector (220), and a power control section (240). The receiver section (103) is for receiving and demodulating a radio signal. The address detector (210) is for comparing an address demodulated by the receiver section (103) to at least one selective call address stored in the selective call radio (100). The address detector (210) is also for generating an address detect signal when the address matches one of the at least one selective call address within predetermined parameters. The power off command detector (220) is for generating a power off signal when the address detect signal is generated and the radio signal includes a power off command. The power control section (240) is responsive to the power off signal for changing a state of the selective call radio (100) to an off state.

Abstract: A selective call receiver (900) includes a ceramic substrate (820) for conveying an electrical signal. The ceramic substrate (820) has at least one solder pad which includes a solder pad area (110) of an electrical conductor (120) on the ceramic substrate and a solder wettable layer (210). The electrical conductor (120) consists essentially of a conductive ceramic material. The solder wettable layer (210) is attached to the solder pad area (110). The solder wettable layer (210) includes at least 50% indium by weight. A circuit device (410) has at least one circuit terminal which is soldered to the at least one solder pad of the ceramic substrate (820) for electrical interconnection to another circuit device (410) in the selective call receiver (900).

Abstract: A display system (500) processes an input signal to generate an image. The input signal includes successive frames of data defining lines which include image values and have a line direction. A display (100) for displaying the image has second electrodes (104) which are in a direction corresponding to the line direction. A video memory (640) which stores a frame of data includes a single line buffer (602) and a single frame buffer (608). A controller (622) controls storage of the frame of data into the video memory (640) and generates a predetermined image independent function during a time slot. A calculation engine (632) computes an image dependent output signal during the time slot which has values. Each of the values is determined from the predetermined image independent function and image values from one of the lines stored in the video memory (640).

Abstract: A selective call receiver (105) for use in a selective call communication system (100) and a controller (206). The receiver (203) is for receiving and demodulating a digital signal which includes a predetermined sequence of A.times.N interleaved symbols representing a non-interleaved set of N tiers of symbols, each tier having A symbols, wherein A and N are positive integers. The controller (206) includes a deinterleaver (830) which reconstructs the non-interleaved set of N tiers of symbols from the demodulated signal, and a decoder (950) detects and corrects errors in the deinterleaved set of N tiers of symbols. The digital signal is transmitted simultaneously from two transmitters (103) having a difference frequency 1/P, and the symbols are transmitted at a rate of SPS symbols per second. The period of the difference frequency is given by P=(A.times.N)/SPS.

Abstract: A solder pad for mechanically and electrically coupling solder terminals (420) of electronic devices (410) to a non-conductive ceramic substrate (130) includes a solder pad portion (110) of a conductive runner (120) and a solder wettable layer (210). The solder pad portion (110) of the conductive runner (120) is on the non-conductive ceramic substrate (130). The conductive runner (120) consists essentially of a conductive ceramic material. The solder wettable layer (210) is attached to the solder pad portion (110). The solder wettable layer (210) includes at least 50% indium by weight.

Abstract: A system controller (102) for managing telephone inputs includes telephone inputs for connecting to telephone calls, a service request handler (420), a monitor (432), and a limit adjuster (434). The telephone inputs are used for telephone calls, each telephone call being one of a plurality of call types. The service request hander (420) handles requests for phone call service by connecting telephone inputs to telephone calls according to an input limit for the call types, and further couples the telephone inputs to call handlers according to the call types. The monitor (432) monitors call connections of the telephone inputs for a first call type. The limit adjuster (434) adjusts an input limit according to a utilization factor derived in the monitoring step.

Abstract: A system controller (102) is for scheduling outbound signal transmissions in a radio communication system (100). A scheduled memory (414) is for storing a set of messages. A best cell means (430) is for determining a best power level and a best cell transmitter associated with each message in the set of messages. The best power level reliably communicates each message at a minimum required power level. A scheduling means (416) is coupled to the best cell means (430) and the scheduled memory (414) and is for generating an initial schedule of transmission times of the set of messages and improving the initial schedule. A cell site controller (402) is for controlling transmissions of a set of outbound signals from the plurality of cell transmitters according to the transmission times stored in the scheduled memory (414).

Abstract: A fixed system receiver (107), which includes a forward receiver (305), a reverse receiver (310), and a response timer (215), is for use in a radio communication system (100) having a forward radio channel and a reverse radio channel. A command is transmitted in a forward channel radio signal to a selective call transceiver. The forward receiver (305) is for receiving, demodulating, and decoding the command. The reverse receiver (310) is for receiving and demodulating the reverse channel radio signal. The response timer (215), which is coupled to the forward receiver (305) and the reverse receiver (310), is for determining a response period beginning substantially at a scheduled response time included in the command and having a duration which is substantially a designated length of the data unit included in the command, and for generating a control signal which enables the reverse receiver (310) during the response period.

Abstract: A lighting system for use in a conveyer system used for work piece assembly comprising a lifting means (285) having one or more transparent upper lifting members (260) for lifting the work piece (270) and a lighting means (230) positioned below the transparent members and rotatably coupled to the lifting means (285) by a rotating means. The lighting means rotatably extends when the lifting means (285) is raised, thereby providing illumination to the work piece (270), and rotatably retracts when the lifting means (285) is lowered.

Abstract: A first transmitter (103) reduces an interference in a time division duplex (TDD) communication system (100). The first transmitter (103) alternates from a transmit state in which a first information signal (130) is transmitted to a standby state in which a residual signal (132) is transmitted. The first transmitter (103) includes a transmitter section (142) and a controller (141). The transmitter section (142 transmits the first information signal (130) and the residual signal (132). The transmitter section (142) includes a power amplifier (144) to amplify the first information signal (130) and the residual signal (132) to a power level; and an exciter (143) to control a carrier frequency of the first information signal (130) and the residual signal (132). The controller (141) is coupled to the power amplifier (144) and the exciter (143), for adjusting the power level and setting the carrier frequency.

Abstract: A voltage controlled tunable resonant circuit (100) has at least two resonant frequency ranges and reduced self modulation, and includes a resonant element (120), a variable reactance element (130), and a first voltage variable capacitor (VVC) (150). The variable reactance element (130) is coupled to the resonant element (120). The VVC (150) has two fixed capacitance values corresponding to two fixed capacitance bias voltage ranges, and is coupled to the resonant element (120) and the variable reactance element (130). The first VVC (150) is controlled by a first DC bias voltage (190) selected to be within one of the two fixed capacitance bias voltage ranges to establish one of the two resonant frequency ranges over which the voltage controlled tunable resonant circuit (100) is tuned by variation of the variable reactance element (130).

Abstract: A method is used in a receiver (100) for aligning the receiver (100). The method has a step of intercepting and demodulating the FM signal, which includes data symbols. The method has a step of determining error rates, in which the error rates of at least two subsets of the data symbols are determined. Each subset includes a plurality of the data symbols modulated at a unique one of a plurality of frequency deviations. The at least two subsets include data symbols of two opposite polarities. The method has a step of generating a frequency control signal, in which the frequency control signal is determined based on the error rates. The method has a step of aligning a receiver section (105), in which the receiver section (105) is aligned to the FM signal by controlling a local oscillator (320)which is responsive to the frequency control signal.

Abstract: A portable radio device (106) has a first operational mode and a second operational mode, and includes a receiver (314), a controller (315), and a mode control device (350). The receiver (314) receives an indexed information message. The controller (315) stores an authorized information field list and is coupled to the receiver (314). The controller (315) decodes the indexed information message, generates an index portion of the decoded indexed information message, and generates a mode control schedule determined by the index portion and the authorized information field list. The mode control device (350) is coupled to the controller (315) for controlling the first and second modes of the portable radio device according to the mode control schedule.

Abstract: A method of locating a portable communication unit (108) having a transmitter (852) for transmitting acknowledge back signals, consists of the steps of transmitting, to the portable communication unit (108) from the communication cell transmitters (104), an information signal which consists of a predetermined color code word which identifies a subset of the communication cells (500) for which radio coverage does not overlap; receiving an acknowledge back signal from the portable communication unit (108) consisting of a reported color code value determined from the color code word transmitted in the information signal; and analyzing the reported color code value to determine a cell location of the portable communication unit (108).