Revision as of 20:33, 27 March 2023 edit Voidxor (talk \| contribs) Extended confirmed users, Pending changes reviewers, Rollbackers 39,390 edits m Rm duplicate link per MOS:DUPLINK. Tag: AWB ← Previous edit		Revision as of 03:45, 5 July 2023 edit undo Read-write-services (talk \| contribs) Extended confirmed users 1,881 edits →Method: slight rejig for sense Tag: Visual edit Next edit →
Line 5: A [[Carrier wave\|carrier]] and [[sideband]] (CSB), and [[Double-sideband suppressed-carrier transmission\|sideband only]] (SBO) signal, transmitted from [[Instrument landing system localizer\|localizer]] and [[Instrument landing system glide path\|glide path]] antennas produce a space-modulated signal resulting from the vectorial addition of two or more audio signals that vary according to position of the receiving aircraft. The difference between the two modulation depths produce an error current signal in the airborne receiver. When an aircraft follows the course line, the difference in the depths of the modulation between the two frequencies is zero. This difference is conventionally displayed by the deflection of a moving coil indicator or needle on an instrument known as a [[horizontal situation indicator]] (HSI).

Difference in the depth of modulation: Difference between revisions