Abstract: A multi-purpose test system and method for testing RF products. The system includes a plurality of instruments housed within a test unit and a power supply or a power supply board, and/or a USB hub. The plurality of instruments includes two or more devices from the following: a spectrum analyzer, a signal generator, an oscilloscope, a tracking generator, a radio frequency power meter, one or more power amplifiers, a radio frequency relay, a coupler, and a radio frequency signal attenuator.

Abstract: A unique cellular telephone (500) includes audio circuit 502, microcomputer (508), indicators (506) and (507), cellular telephone transceiver (519), and keypad controller (504) for controlling the operating modes thereof and automatically placing and receiving cellular telephone calls dialed in any pattern. The keypad includes numerical keys (0-9, # and *) and function keys (MEM and END/CLEAR) for entering digits of telephone number and key sequences for selecting operating modes. Power is applied to the cellular telephone transceiver (519) in response to concurrent activation of at least two keys. Each telephone number digit is detected and accumulated by microcomputer (508) and, after a pause of four seconds, the accumulated digits are sent via a data bus (511) to cellular telephone transceiver (519) for placing a telephone call. The call is subsequently terminated when the END key is activated or an END command is received by the cellular telephone transceiver (519).

Abstract: A unique cellular telephone (100) connects to a standard telephone set (101) for providing cellular telephone services to subscribers in remote locations not served by a landline telephone system. Cellular telephone (100) includes a cellular telephone transceiver (109), microcomputer (108) and circuitry (102-106) for interfacing the cellular telephone transceiver (109) to the telephone set (101). The interface circuit (102-107) provides the audio, voltage and dial signal interface to the telephone set (101). The microcomputer (108) controls the interface circuitry (102-106) and is responsive to the telephone set (101) for answering and placing cellular telephone calls.