{"id":969,"date":"2020-09-28T17:12:01","date_gmt":"2020-09-28T21:12:01","guid":{"rendered":"http:\/\/eparsonline.org\/public_html\/eparsonline.org\/?page_id=969"},"modified":"2020-09-28T17:17:26","modified_gmt":"2020-09-28T21:17:26","slug":"what-is-ctcss","status":"publish","type":"page","link":"https:\/\/eparsonline.org\/public_html\/eparsonline.org\/downloads\/what-is-ctcss\/","title":{"rendered":"What is CTCSS"},"content":{"rendered":"<p style=\"text-align: center;\">Here is a power point presentation that you can download and watch.<\/p>\n<p style=\"text-align: center;\">Click on the logo below<\/p>\n<p><a href=\"http:\/\/eparsonline.org\/public_html\/eparsonline.org\/wp-content\/uploads\/2020\/09\/What-is-CTCSS.zip\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-971\" src=\"http:\/\/eparsonline.org\/public_html\/eparsonline.org\/wp-content\/uploads\/2020\/09\/delete-icon.png\" alt=\"\" width=\"205\" height=\"217\" \/><\/a><\/p>\n<p>In\u00a0<a class=\"mw-redirect\" title=\"Telecommunications\" href=\"https:\/\/en.wikipedia.org\/wiki\/Telecommunications\">telecommunications<\/a>,\u00a0<b>Continuous Tone-Coded Squelch System<\/b>\u00a0or\u00a0<b>CTCSS<\/b>\u00a0is one type of\u00a0<a title=\"Electrical network\" href=\"https:\/\/en.wikipedia.org\/wiki\/Electrical_network\">circuit<\/a>\u00a0that is used to reduce the annoyance of listening to other users on a shared\u00a0<a title=\"Two-way radio\" href=\"https:\/\/en.wikipedia.org\/wiki\/Two-way_radio\">two-way radio<\/a>\u00a0communications channel. (See\u00a0<a title=\"Squelch\" href=\"https:\/\/en.wikipedia.org\/wiki\/Squelch\">squelch<\/a>.) It is sometimes referred to as\u00a0<b>tone squelch.<\/b>\u00a0It does this by adding a low frequency audio tone to the voice. Where more than one group of users is on the same radio frequency (called\u00a0<i>co-channel users<\/i>), CTCSS circuitry mutes those users who are using a different CTCSS tone or no CTCSS. It is sometimes referred to as a\u00a0<b>sub-channel<\/b>, but this is a misnomer because no additional channels are created. All users with different CTCSS tones on the same channel are still transmitting on the identical\u00a0<a title=\"Radio frequency\" href=\"https:\/\/en.wikipedia.org\/wiki\/Radio_frequency\">radio frequency<\/a>, and their transmissions interfere with each other; however; the interference is masked under most (but not all) conditions. The CTCSS feature also does not offer any security.<\/p>\n<p>A receiver with just a\u00a0<a title=\"Squelch\" href=\"https:\/\/en.wikipedia.org\/wiki\/Squelch\">carrier or noise squelch<\/a>\u00a0does not suppress any sufficiently strong signal; in CTCSS mode it unmutes only when the signal also carries the correct sub-audible audio tone. The tones are not actually below the range of human hearing, but are poorly reproduced by most communications-grade speakers and in any event are usually filtered out before being sent to the speaker or headphone. CTCSS can be regarded as a form of\u00a0<a title=\"In-band signaling\" href=\"https:\/\/en.wikipedia.org\/wiki\/In-band_signaling\">in-band signaling<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Here is a power point presentation that you can download and watch. Click on the logo below In\u00a0telecommunications,\u00a0Continuous Tone-Coded Squelch System\u00a0or\u00a0CTCSS\u00a0is one type of\u00a0circuit\u00a0that is used to reduce the annoyance of listening to other users on a shared\u00a0two-way radio\u00a0communications channel. (See\u00a0squelch.) It is sometimes referred to as\u00a0tone squelch.\u00a0It does this by adding a low frequency [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":75,"menu_order":2020,"comment_status":"closed","ping_status":"closed","template":"","meta":{"ngg_post_thumbnail":0,"footnotes":""},"class_list":["post-969","page","type-page","status-publish","hentry","post"],"_links":{"self":[{"href":"https:\/\/eparsonline.org\/public_html\/eparsonline.org\/wp-json\/wp\/v2\/pages\/969","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/eparsonline.org\/public_html\/eparsonline.org\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/eparsonline.org\/public_html\/eparsonline.org\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/eparsonline.org\/public_html\/eparsonline.org\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/eparsonline.org\/public_html\/eparsonline.org\/wp-json\/wp\/v2\/comments?post=969"}],"version-history":[{"count":2,"href":"https:\/\/eparsonline.org\/public_html\/eparsonline.org\/wp-json\/wp\/v2\/pages\/969\/revisions"}],"predecessor-version":[{"id":974,"href":"https:\/\/eparsonline.org\/public_html\/eparsonline.org\/wp-json\/wp\/v2\/pages\/969\/revisions\/974"}],"up":[{"embeddable":true,"href":"https:\/\/eparsonline.org\/public_html\/eparsonline.org\/wp-json\/wp\/v2\/pages\/75"}],"wp:attachment":[{"href":"https:\/\/eparsonline.org\/public_html\/eparsonline.org\/wp-json\/wp\/v2\/media?parent=969"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}