{"id":24036,"date":"2022-05-24T14:00:29","date_gmt":"2022-05-24T12:00:29","guid":{"rendered":"https:\/\/genesys-offenburg.de\/?post_type=smart-docs&#038;p=24036"},"modified":"2022-12-07T12:26:57","modified_gmt":"2022-12-07T11:26:57","slug":"relationship-between-baud-rate-and-range-of-satel-modems","status":"publish","type":"smart-docs","link":"https:\/\/genesys-offenburg.de\/en\/support\/troubleshooting\/third-party-system-issues\/relationship-between-baud-rate-and-range-of-satel-modems\/","title":{"rendered":"Relationship between Baud rate and Range of Satel Modems"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\">Range Change<\/h2>\n\n\n\n<p>It is possible to configure the following settings:<br>1] Baud rate: 9600 bps | Channel spacing: 12.5 kHz<br>2] Baud rate: 19200 bps | Channel Spacing: 25 kHz<\/p>\n\n\n\n<p>Option 1 got a better sensivity of 3 dB. In theory, the distance of the 12.5 kHz setting is 1.43 greater than the 25 kHz setting. With 12.5 kHz bandwidth, a distance of 15 km can be achieved in line of sight. <\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Baude rates<\/h2>\n\n\n\n<p>Over the air, the sent data get compressed. On the serial line 10 bits are used on one character (start bit, 8 data bits, stop bit), but over the air, only 8 data bits are sent. <\/p>\n\n\n\n<p>In transmission, serial 38400 bps is faster than 19200 bps via air, but 8 data bits are sent, so the ratio of serial and air speed is smaller. The rest of the bits, are written to the transmit buffer.<br>If the packet is very large, there is a risk that the buffer will overflow, which must use the handshake RTS flow control.<br>In the receive side modem, you get the data flow from the radio, which is slower than the serial port. The receiver tries to keep the data flow constant, but eventually a data break appears in the data flow.<br>This happens more easily when FEC is on (radio slower). To avoid this, the CRC16 error check keeps the packets constant.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Range Change It is possible to configure the following settings:1] Baud rate: 9600 bps | Channel spacing: 12.5 kHz2] Baud rate: 19200 bps | Channel Spacing: 25 kHz Option 1 got a better sensivity of 3 dB. In theory, the distance of the 12.5 kHz setting is 1.43 greater than the 25 kHz setting. With [&hellip;]<\/p>\n","protected":false},"author":148,"featured_media":0,"template":"","meta":{"_acf_changed":false,"_links_to":"","_links_to_type":0,"footnotes":""},"smartdocs_category":[807,892,810,858],"class_list":{"0":"post-24036","1":"smart-docs","2":"type-smart-docs","3":"status-publish","5":"smartdocs_category-auxsystems","6":"smartdocs_category-satel-radio-modem","7":"smartdocs_category-troubleshooting","8":"smartdocs_category-third-party-system-issues"},"acf":[],"_links":{"self":[{"href":"https:\/\/genesys-offenburg.de\/en\/wp-json\/wp\/v2\/smart-docs\/24036","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/genesys-offenburg.de\/en\/wp-json\/wp\/v2\/smart-docs"}],"about":[{"href":"https:\/\/genesys-offenburg.de\/en\/wp-json\/wp\/v2\/types\/smart-docs"}],"author":[{"embeddable":true,"href":"https:\/\/genesys-offenburg.de\/en\/wp-json\/wp\/v2\/users\/148"}],"version-history":[{"count":0,"href":"https:\/\/genesys-offenburg.de\/en\/wp-json\/wp\/v2\/smart-docs\/24036\/revisions"}],"wp:attachment":[{"href":"https:\/\/genesys-offenburg.de\/en\/wp-json\/wp\/v2\/media?parent=24036"}],"wp:term":[{"taxonomy":"smartdocs_category","embeddable":true,"href":"https:\/\/genesys-offenburg.de\/en\/wp-json\/wp\/v2\/smartdocs_category?post=24036"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}