Diagnostic mode for a frequency synthesizer

Details Diagnostic mode for a frequency synthesizer Diagnostic mode for a frequency synthesizer

1989-03-02

1992-06-23

Eisenzopf, Reinhard J.

Telecommunications

Receiver or analog modulated signal frequency converter

Measuring or testing of receiver

455260, 371 225, H04B 1700

Patent

active

051251078

ABSTRACT:
A built in test circuit within a frequency synthesizer for use in selective call radio receivers provides a selectable one of a plurality of internal signals as a test signal for diagnosing the frequency synthesizer's output in real time.

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patent: 4701920 (1987-10-01), Resnick et al.
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patent: 4893094 (1990-01-01), Herold et al.
patent: 4918379 (1990-04-01), Jongepier
patent: 4935707 (1990-06-01), Irwin
patent: 4949341 (1990-08-01), Lopez et al.

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