Pager receiver comprising a memory storing a sequence of information signals to be tested
First Claim
1. A pager receiver comprising a radio signal receiving portion responsive to a radio calling signal for producing a sequence of demodulated signals, a decoding portion for decoding said demodulated signal sequence to carry out an operation in accordance with said demodulated signal sequence, and a display unit coupled to said decoding portion for providing visual displays when said display unit is driven by said decoding unit, said radio calling signal carrying a test mode signal which is indicative of a test mode and which is demodulated into a specific one of said demodulated signals, said decoding unit comprising:
- detecting means responsive to said demodulated signals for detecting said specific one of the demodulated signals; and
signal delivery means operatively coupled to said detecting means and said display unit for delivering a test data signal to said display unit in response to said specific one of the demodulated signals so as to test said display unit.
1 Assignment
0 Petitions
Accused Products
Abstract
In a pager receiver comprising a display circuit and an ROM, a controller produces a test mode signal indicative of a test mode in which either the display circuit or the ROM is tested. Responsive to the test mode signal, the ROM supplies the display circuit with a succession of display signals which are previously stored therein and representative of all alphanumeric symbols displayed by the display circuit, so as to test the display circuit. Alternatively, all of contents stored in the ROM are successively sent from the ROM to the display circuit in response to the test mode signal on testing the ROM, so as to inspect the contents. The test mode signal may be delivered from a transmitting end to the controller in the form of a radio calling signal or given to the controller by manual operation. The test mode signal may specify more than two sorts of tests.
16 Citations
5 Claims
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1. A pager receiver comprising a radio signal receiving portion responsive to a radio calling signal for producing a sequence of demodulated signals, a decoding portion for decoding said demodulated signal sequence to carry out an operation in accordance with said demodulated signal sequence, and a display unit coupled to said decoding portion for providing visual displays when said display unit is driven by said decoding unit, said radio calling signal carrying a test mode signal which is indicative of a test mode and which is demodulated into a specific one of said demodulated signals, said decoding unit comprising:
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detecting means responsive to said demodulated signals for detecting said specific one of the demodulated signals; and signal delivery means operatively coupled to said detecting means and said display unit for delivering a test data signal to said display unit in response to said specific one of the demodulated signals so as to test said display unit. - View Dependent Claims (2, 3, 4, 5)
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Specification