Better modes for rectangular waveguide in dual-mode filters are TE 103 and TE 105.
2.
The voice architecture, on a superficial level, resembles a typical twin-oscillator plus multi-mode filter design.
3.
TE 011 circular mode is used where very low loss ( hence high " Q " ) is required but cannot be used in a dual-mode filter because it is circularly symmetric.
4.
There should therefore be a section describing and explaining evanescent mode filters ( I am aware that these are now mentioned in " History " and " General description and principles " ).
5.
The AN1x also offers a non-resonant high-pass filter in series with the resonant multi-mode filter, feedback from the VCA back to the mixer of oscillators before the main filter, and frequency modulation that can be used alongside oscillator sync.
6.
The MOD-7 ( $ 249.00 ) includes six oscillators which combine simultaneous VPM ( aka FM ), Waveshaping, and ring modulation, plus a PCM oscillator, noise generator, audio input, two multi-mode filters, three 2-in / 1-out mixers, and an input main mixer with a patch panel for routing them together.
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