1. 〈http://www.rfdh.com/bas_rf/beginer.htm〉.
2. 〈http://www.rfdh.com/bas_rf/begin/if.htm〉.
3. Principle of Communications Systems, Modulation, and Noise, 4th edition;Ziemer,1998
4. Varian co., Interlaced Linatron M-Series Maintenance Reference Guide, Document no. 100018499-02 Revision 2, 2011, pp. 82-84.
5. J. Turner, Magnetron Automatic Frequency Control System, EE498 senior design project report. pp. 1–8.