Modes - Revision history

N6FAV: Copy edit /* Packet */

2019-05-09T19:20:07Z

Copy edit Packet

← Older revision		Revision as of 12:20, 9 May 2019
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	This mode was popular in the late 1970's and early 1980's, but has decreased in use since then.		This mode was popular in the late 1970's and early 1980's, but has decreased in use since then.

	[http://en.wikipedia.org/wiki/Packet_radio Wikipedia ~~packet~~ article]		See main amateur-radio-wiki article: [[Packet]]

			[http://en.wikipedia.org/wiki/Packet_radio Or Wikipedia article on Packet]

	== Phase Shift Keying (PSK) ==		== Phase Shift Keying (PSK) ==

TimVK4YEH: added some info

2010-12-19T04:47:59Z

added some info

← Older revision		Revision as of 21:47, 18 December 2010
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	Grabber software can be obtained from the[http://www.swharden.com/blog/qrss_vd/ QRSS VD] site, and instructions on how to set up a grabber site can be obtained [http://knightsqrss.blogspot.com/2010/11/howto-setup-qrss-grabber.html here].		Grabber software can be obtained from the[http://www.swharden.com/blog/qrss_vd/ QRSS VD] site, and instructions on how to set up a grabber site can be obtained [http://knightsqrss.blogspot.com/2010/11/howto-setup-qrss-grabber.html here].

			This [http://on5ex.be/clipboard_view_unreg.php clipboard] has probably the most up to date information about qrss beacons and grabbers.

			Kits can be obtained [http://www.hanssummers.com/qrsskit here].

	See [[Wikipedia:Continuous_wave\|Wikipedia Continuous Wave]] for more information.		See [[Wikipedia:Continuous_wave\|Wikipedia Continuous Wave]] for more information.

TimVK4YEH: added info and links wrt qrss

2010-12-18T03:49:09Z

added info and links wrt qrss

← Older revision		Revision as of 20:49, 17 December 2010
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	A continuous wave is an electromagnetic wave of constant amplitude and frequency, a pure carrier, and information is carried by turning the wave on and off, and measuring the interval. Morse code is often transmitted using CW.		A continuous wave is an electromagnetic wave of constant amplitude and frequency, a pure carrier, and information is carried by turning the wave on and off, and measuring the interval. Morse code is often transmitted using CW.

			=== QRSS - Slow Morse ===

			The term QRSS comes from the Morse Code [[Codes_and_Alphabets \|Q-Code]] QRS which means either "Shall I send more slowly?" or "Please send more slowly"

			In practice QRSS has a dot time-length of 3 seconds or more, and occupies a very narrow bandwidth - as low as 1Hz.

			QRSS signals are monitored by "grabbers" such as those listed on [http://digilander.libero.it/i2ndt/grabber/grabber-compendium.htm this site] from I2NDT.

			Grabber software can be obtained from the[http://www.swharden.com/blog/qrss_vd/ QRSS VD] site, and instructions on how to set up a grabber site can be obtained [http://knightsqrss.blogspot.com/2010/11/howto-setup-qrss-grabber.html here].

	See [[Wikipedia:Continuous_wave\|Wikipedia Continuous Wave]] for more information.		See [[Wikipedia:Continuous_wave\|Wikipedia Continuous Wave]] for more information.

TimVK4YEH: added G5UCJ digi modes website

2010-11-06T10:07:17Z

added G5UCJ digi modes website

← Older revision		Revision as of 03:07, 6 November 2010
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	'''What do digital modes sound like?''' [http://www.kb9ukd.com/digital/ Click here to find out.]		'''What do digital modes sound like?''' [http://www.kb9ukd.com/digital/ Click here to find out.]
			* G4UCJ has a useful site with screenshots of digital modes here at [http://www.hfradio.org.uk/html/digital_modes.html G4UCJ's Radio Website]

	=VOIP (Voice Over IP) Modes=		=VOIP (Voice Over IP) Modes=

TimVK4YEH: /* MFSK - '''M'''ultiple '''F'''requency '''S'''hift '''K'''eying */

2010-11-03T08:23:35Z

MFSK - '''M'''ultiple '''F'''requency '''S'''hift '''K'''eying

← Older revision		Revision as of 01:23, 3 November 2010
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	* [http://hflink.com/olivia/ Olivia ] includes information, download links and frequencies used.		* [http://hflink.com/olivia/ Olivia ] includes information, download links and frequencies used.

			* [http://rosmodem.wordpress.com/ ROS digital] Download the latest version and contribute to the blog.

	* [http://www.dl5swb.de/html/throb_2_5x3_3.htm Throb ] screenshot and download link.		* [http://www.dl5swb.de/html/throb_2_5x3_3.htm Throb ] screenshot and download link.

TheAnarcat at 04:38, 11 October 2010

2010-10-11T04:38:02Z

← Older revision		Revision as of 21:38, 10 October 2010
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	* [[QRP]]		* [[QRP]]

			= External links =

			* [[Wikipedia:Modulation]]


	{{modes}}		{{modes}}

TheAnarcat at 01:24, 3 October 2010

2010-10-03T01:24:37Z

← Older revision		Revision as of 18:24, 2 October 2010
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	The transceiver produces a carrier wave at the frequency of transmission. Voice is superimposed on the carrier wave, and alters its shape by changing the '''Amplitude''' or height of the wave. Hence the frequency and wavelength of the carrier do not change with this form of modulation.		The transceiver produces a carrier wave at the frequency of transmission. Voice is superimposed on the carrier wave, and alters its shape by changing the '''Amplitude''' or height of the wave. Hence the frequency and wavelength of the carrier do not change with this form of modulation.

	See [[Wikipedia:Amplitude_modulation\|Amplitude Modulation]] for more information.		See [[Wikipedia:Amplitude_modulation\|Amplitude Modulation on Wikipedia]] for more information.

	== Double-Sideband Modulation (DSB) ==		== Double-Sideband Modulation (DSB) ==
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	The transceiver produces a carrier wave, in the same way as for Amplitude Modulation. In this case however, voice is added to the carrier so that is '''frequency''' changes. This in turn affects the wavelength of the carrier, but the amplitude remains constant.		The transceiver produces a carrier wave, in the same way as for Amplitude Modulation. In this case however, voice is added to the carrier so that is '''frequency''' changes. This in turn affects the wavelength of the carrier, but the amplitude remains constant.

	See ~~Wikipedia's~~ [[Wikipedia:Frequency_modulation\|Frequency Modulation]] ~~article~~ for more information.		See [[Wikipedia:Frequency_modulation\|Frequency Modulation on Wikipedia]] for more information.

	<math>x(t) = \cos( 2 \pi ( f_c + \Delta f m(t) t + \phi ) )</math>		<math>x(t) = \cos( 2 \pi ( f_c + \Delta f m(t) t + \phi ) )</math>

TheAnarcat: related pages below

2010-10-03T01:21:22Z

related pages below

@@ Line 1: / Line 1: @@
 The term mode has varying meanings, according to the context, but the most common are permitted modes in amateur licensing.
@@ Line 269: / Line 267: @@
 All VOIP modes require some ham radio certification
-[[CQ100]]
+* [[CQ100]]
-[[IRLP]]
+* [[Repeater listings]]
 {{modes}}

Carlb: /* Phase Modulation (PM) */

2009-11-16T02:07:45Z

Phase Modulation (PM)

← Older revision		Revision as of 19:07, 15 November 2009
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	The well-known [[Modes#Phase Shift Keying (PSK)\|PSK31]] digital mode is a form of phase modulation.		The well-known [[Modes#Phase Shift Keying (PSK)\|PSK31]] digital mode is a form of phase modulation.

	In analogue radio, phase modulation differs only vary slightly from frequency modulation as frequency is the rate of change of phase. In FM, output frequency deviation is directly proportional to input signal amplitude only. A PM signal looks much like an FM signal except that output frequency deviation is directly proportional to both input signal amplitude and input frequency. An FM receiver would therefore receive a PM signal, but high frequencies in the audio would be pre-emphasised by 3dB/octave.		In analogue radio, phase modulation differs only vary slightly from frequency modulation as mathematically frequency is the rate of change of phase. In FM, output frequency deviation is directly proportional to input signal amplitude only. A PM signal looks much like an FM signal except that output frequency deviation is directly proportional to both input signal amplitude and input frequency. An FM receiver would therefore receive a PM signal, but high frequencies in the audio would be pre-emphasised by 3dB/octave.

	== Lesser known modes ==		== Lesser known modes ==

Carlb: /* Phase Modulation (PM) */

2009-11-16T02:07:14Z

Phase Modulation (PM)

← Older revision		Revision as of 19:07, 15 November 2009
Line 46:		Line 46:
	The well-known [[Modes#Phase Shift Keying (PSK)\|PSK31]] digital mode is a form of phase modulation.		The well-known [[Modes#Phase Shift Keying (PSK)\|PSK31]] digital mode is a form of phase modulation.

	In analogue radio, phase modulation differs only vary slightly from frequency modulation. In FM, output frequency deviation is directly proportional to input signal amplitude only. A PM signal looks much like an FM signal except that output frequency deviation is directly proportional to both input signal amplitude and input frequency. An FM receiver would therefore receive a PM signal, but high frequencies in the audio would be pre-emphasised.		In analogue radio, phase modulation differs only vary slightly from frequency modulation as frequency is the rate of change of phase. In FM, output frequency deviation is directly proportional to input signal amplitude only. A PM signal looks much like an FM signal except that output frequency deviation is directly proportional to both input signal amplitude and input frequency. An FM receiver would therefore receive a PM signal, but high frequencies in the audio would be pre-emphasised by 3dB/octave.

	== Lesser known modes ==		== Lesser known modes ==