DUAL_DETECTORS_PREVENT_LOCKING_ON_SIDEBANDS

Published:2009/7/15 4:49:00 Author:Jessie | From:SeekIC

Antisideband circuit rejects side-band locking while telemetry tracking loop is automatically searching for signals around i-f value. Circuit also provides both p-m and aim demodulation. Emitter-follower Q1, receiving i-f signal, feeds discriminator Q6-07 through limiters Q2-Q3 and Q4-05. For 455-kc input, d-c outputs of diode detectors cancel at hose of Q8. For lower or higher frequencies, difference voltage serves to apply antisideband error signal to loop fiber through Q9 or Q10.-W. H. Casson and C. C. Hall, New Phase-Tracking Demodulator Will Not Lock on Sidebands, Electronics, 36:6, p 52-55.



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