An Emission Designator code is associated with a frequency channel that gives information about the channel’s frequency bandwidth and the nature of the signal on that frequency.<\/p>\n\n\n\n
Raveon\u2019s FM Data Radios typically use these Occupied Bandwidths. See data sheets or contact sales team for detailed Occupied Bandwidth information.<\/p>\n\n\n\n If\nyou need a different Occupied Bandwidth, contact Raveon\u2019s sales or support team\nand we can setup a radio to other power and deviation settings to ensure it\nmeets your bandwidth requirements. <\/p>\n\n\n\n For a wireless device, am Emissions Designators are a 6 to 8 character code identifying the electromagnetic modulation characteristics. Codes represent different features of wireless emissions from different products. <\/p>\n\n\n\n Emission Designators are used by governments including the FCC and ACMA. <\/p>\n\n\n\n Emission Designator consists of 7 characters as described here:<\/strong><\/p>\n\n\n\n The first four characters identify the bandwidth required to transmit data at the rate with the required system performance that is used.<\/p>\n\n\n\n The fifth character is the type of modulation of the main carrier.<\/p>\n\n\n\n The sixth character is the signal modulating the RF carrier.<\/p>\n\n\n\n The seventh character is the type of information transmitted.<\/p>\n\n\n\n The 6th character of the emission designator specifies the type of data that is being transmitted. Here is a list of transmission types:<\/p>\n\n\n\n Modulation Type Codes<\/strong><\/p>\n\n\n\n N None Here is an example of an Emission Designator, that shows and explains the different items to indicate in the Emission Designator. <\/p>\n\n\n\n Emission Designator structure and Emission Designator Example for 11K0F1D <\/p>\n\n\n\n Emission Designator structure and Emission Designator Example for 11K0F1D <\/p>\n\n\n\n <\/p>\n\n\n\n Calculating Emission Designation Bandwidth (BW)<\/p>\n\n\n\n The math for calculating bandwidth of an FM signal can be simple algebra.<\/p>\n\n\n\n BW = 2 x { Baud Rate + FM Peak deviation }<\/p>\n\n\n\n Baud Rate is: modulation frequency, is the highest frequency of the data rate you send out over the air. For voice communications, modulation frequency is generally accepted to be 3000 Hz. In a radio system with the peak deviation of 2.5 kHz, the Audio formula works out like this:<\/p>\n\n\n\n BW= 2 (3000 + 2500 ) = 11 kHz<\/p>\n\n\n\n For data communications, the formula is: Bandwidth = B + (K \u00d7 Shift) The bandwidth of a 3300-Hz shift, 9600 baud ASCII signal transmitted as a F1D emission on a wide-band channel : On a Narrow band channel, 4800 baud, 2.2kHz deviation For FM modulation (FSK) data transmissions, the bandwidth formula can be: BW = Baud + 2 * FMdeviation * 1.2<\/p>\n\n\n\n The FCC shows Binary Frequency Shift Keying math<\/em>: <\/p>\n","protected":false},"excerpt":{"rendered":" An Emission Designator code is associated with a frequency channel that gives information about the channel’s frequency bandwidth and the nature of the signal on that frequency. Raveon\u2019s FM Data Radios typically use these Occupied Bandwidths. See data sheets or contact sales team for detailed Occupied Bandwidth information. Emission Designator RF Bandwidth FM Deviation for […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[53],"tags":[],"_links":{"self":[{"href":"https:\/\/www.raveon.com\/data_radio_info\/wp-json\/wp\/v2\/posts\/1300"}],"collection":[{"href":"https:\/\/www.raveon.com\/data_radio_info\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.raveon.com\/data_radio_info\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.raveon.com\/data_radio_info\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.raveon.com\/data_radio_info\/wp-json\/wp\/v2\/comments?post=1300"}],"version-history":[{"count":9,"href":"https:\/\/www.raveon.com\/data_radio_info\/wp-json\/wp\/v2\/posts\/1300\/revisions"}],"predecessor-version":[{"id":1333,"href":"https:\/\/www.raveon.com\/data_radio_info\/wp-json\/wp\/v2\/posts\/1300\/revisions\/1333"}],"wp:attachment":[{"href":"https:\/\/www.raveon.com\/data_radio_info\/wp-json\/wp\/v2\/media?parent=1300"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.raveon.com\/data_radio_info\/wp-json\/wp\/v2\/categories?post=1300"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.raveon.com\/data_radio_info\/wp-json\/wp\/v2\/tags?post=1300"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}\n Emission\n Designator\n <\/td> \n RF\n Bandwidth\n <\/td> \n FM\n Deviation for Data Comm.\n <\/td> \n Occupied\n Bandwidth\n <\/td><\/tr> \n 15K0F1D\n <\/td> \n 25kHz\n <\/td> \n 4.4kHz\n <\/td> \n 15kHz\n <\/td><\/tr> \n 11K0F1D\n <\/td> \n 12.5kHz\n <\/td> \n 2.2kHz\n <\/td> \n 11kHz\n <\/td><\/tr> \n 4K0F1D\n <\/td> \n 6.25kHz\n <\/td> \n 1.1kHz\n <\/td> \n 4kHz\n <\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n What is an FCC <\/strong>Emission Designator?<\/h2>\n\n\n\n
Current Modern Emission Designators<\/strong><\/h4>\n\n\n\n
Modulating signal<\/strong> codes<\/h5>\n\n\n\n
A AM (Amplitude Modulation), double sideband, full carrier
H AM, single sideband, full carrier
R AM, single sideband, reduced or controlled carrier
J AM, single sideband, suppressed carrier
B AM, independent sidebands
C AM, vestigial sideband (commonly analog TV)
F Angle-modulated, straight FM
G Angle-modulated, phase modulation (common; sounds like FM)
D Carrier is amplitude and angle modulated
P Pulse, no modulation
K Pulse, amplitude modulation (PAM, PSM)
L Pulse, width modulation (PWM)
M Pulse, phase or position modulation (PPM)
Q Pulse, carrier also angle-modulated during pulse
W Pulse, two or more modes used<\/p>\n\n\n\n\n 1\n <\/td> \n 2\n <\/td> \n 3\n <\/td> \n 4\n <\/td> \n 5\n <\/td> \n 6\n <\/td> \n 7\n <\/td><\/tr> \n Necessary Bandwidth\n <\/td> \n Emission\n Classification Symbol\n <\/td> \n Necessary Bandwidth\n decimal\n <\/td> \n \n <\/td> \n \n <\/td> \n \n <\/td> \n \n <\/td><\/tr> \n 11.0\n <\/td> \n K (Kilohertz)\n <\/td> \n .0\n <\/td> \n FM\n <\/td> \n Digital, on-off or\n quantized, no modulation.\n <\/td> \n Data transmission,\n telemetry, telecommand;\n <\/td> \n \n <\/td><\/tr> \n \n <\/td> \n \n <\/td> \n \n <\/td> \n \n <\/td> \n \n <\/td> \n \n <\/td> \n \n <\/td><\/tr> \n 11\n <\/td> \n K\n <\/td> \n 0\n <\/td> \n F\n <\/td> \n 1\n <\/td> \n D\n <\/td> \n \n <\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
Where BW = (speed of transmission in baud) + (K \u00d7 Frequency shift in hertz) In FSK mode the value of K is = 1.2. For example:<\/p>\n\n\n\n
BW = 9600 + (1.2 \u00d7 3300) = 13,560 Hz
At 4800 deviation, BW = 15kHz on wideband. <\/p>\n\n\n\n
BW=4800+(1.2*2200) = 7440Hz<\/p>\n\n\n\n
Bn = 3.86D + 0.27R D=deviation R=data rate
4800baud at 2.3kHz deviation = 10.2kHz bandwidth. <\/p>\n\n\n\n