D - Revision history

TimVK4YEH: internal link

2010-12-19T05:30:47Z

internal link

← Older revision		Revision as of 22:30, 18 December 2010
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	''' De or DE''' : "this is" or "from" - for example an operator may use VL2TK de VK4ZW .......		''' De or DE''' : "this is" or "from" - for example an operator may use VL2TK de VK4ZW .......

	'''DF''' : Direction finding. Also known as "fox hunting", the use of triangulation and directional antennas to find a hidden transmitter. May be done recreationally, or as a means of locating the source of problematic radio frequency interference.		'''DF''' : Direction finding. Also known as [[ARDF]] and "fox hunting", the use of triangulation and directional antennas to find a hidden transmitter. May be done recreationally, or as a means of locating the source of problematic radio frequency interference.

	'''Diplexer''' : A frequency splitting device used to couple two transceivers to either a single antenna or a dual band antenna.		'''Diplexer''' : A frequency splitting device used to couple two transceivers to either a single antenna or a dual band antenna.

TimVK4YEH: /* D */

2010-12-19T05:05:26Z

← Older revision		Revision as of 22:05, 18 December 2010
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	'''DPSK''' : '''D'''ifferential '''P'''hase '''S'''hift '''K'''eying - a form of BPSK		'''DPSK''' : '''D'''ifferential '''P'''hase '''S'''hift '''K'''eying - a form of BPSK

	'''DRM''' : Digital Radio Mondiale. A system of digital broadcasting developed by a consortium of manufacturers, researchers, broadcasters and governments.		'''[http://www.drm.org/ DRM]''' : Digital Radio Mondiale. A system of digital broadcasting developed by a consortium of manufacturers, researchers, broadcasters and governments.

	'''DSP''' : '''D'''igital '''S'''ignal '''P'''rocessing. The digital processing of signals in filtering, noise reduction etc.		'''DSP''' : '''D'''igital '''S'''ignal '''P'''rocessing. The digital processing of signals in filtering, noise reduction etc.

Carlb: /* D */

2009-11-16T14:45:39Z

← Older revision		Revision as of 07:45, 16 November 2009
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	'''Diplexer''' : A frequency splitting device used to couple two transceivers to either a single antenna or a dual band antenna.		'''Diplexer''' : A frequency splitting device used to couple two transceivers to either a single antenna or a dual band antenna.

	'''[[Dipole]]''' : An antenna with two ~~sides~~, usually of equal length.		'''[[Dipole]]''' : An antenna with two collinear elements, usually of equal length, with feedpoint in the centre. Commonly used as the driven elements for more complex antennas such as the yagi or log-periodic, a dipole on its own is omnidirectional if mounted for [[vertical polarisation]] but has a figure-8 directional pattern if mounted horizontally.

	'''[[Dish or Parabola \| Dish]]''' : A highly directional [[Antennas\|antenna]], parabolic in shape. Often used at [[Microwave and other bands \|microwave]] frequencies.		'''[[Dish or Parabola \| Dish]]''' : A highly directional [[Antennas\|antenna]], parabolic in shape. Often used at [[Microwave and other bands \|microwave]] frequencies.

TimVK4YEH: /* D */

2009-07-07T22:20:48Z

← Older revision		Revision as of 15:20, 7 July 2009
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	'''DF''' : Direction finding. Also known as "fox hunting", the use of triangulation and directional antennas to find a hidden transmitter. May be done recreationally, or as a means of locating the source of problematic radio frequency interference.		'''DF''' : Direction finding. Also known as "fox hunting", the use of triangulation and directional antennas to find a hidden transmitter. May be done recreationally, or as a means of locating the source of problematic radio frequency interference.

			'''Diplexer''' : A frequency splitting device used to couple two transceivers to either a single antenna or a dual band antenna.

	'''[[Dipole]]''' : An antenna with two sides, usually of equal length.		'''[[Dipole]]''' : An antenna with two sides, usually of equal length.
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	'''[http://www.qsl.net/zl1bpu/DOMINO/Index.htm Domino EX]''' : a digital [[Modes \| mode]] that uses a variant of MFSK known as IFK for transmission of information.		'''[http://www.qsl.net/zl1bpu/DOMINO/Index.htm Domino EX]''' : a digital [[Modes \| mode]] that uses a variant of MFSK known as IFK for transmission of information.

			'''Downlink''' : The channel or [[Frequendy_Wavelength_and_Period \|frequency]] used for [[Satellites \|satellite]] to earth communications.

			'''DPSK''' : '''D'''ifferential '''P'''hase '''S'''hift '''K'''eying - a form of BPSK

	'''DRM''' : Digital Radio Mondiale. A system of digital broadcasting developed by a consortium of manufacturers, researchers, broadcasters and governments.		'''DRM''' : Digital Radio Mondiale. A system of digital broadcasting developed by a consortium of manufacturers, researchers, broadcasters and governments.

			'''DSP''' : '''D'''igital '''S'''ignal '''P'''rocessing. The digital processing of signals in filtering, noise reduction etc.

	'''[[DTMF]]''' Dual Tone Multi Frequency - the allocation of a unique tone pair to each button on an appliance (made up of two frequencies - high and low) that allows a computer to recognize the tone. Originally used on a wide scale in landline telephony to allow tone dialling using a small keypad on a telephone or handset, but has been used in amateur radio to remotely control repeaters, autopatch, IRLP or Echolink nodes.		'''[[DTMF]]''' Dual Tone Multi Frequency - the allocation of a unique tone pair to each button on an appliance (made up of two frequencies - high and low) that allows a computer to recognize the tone. Originally used on a wide scale in landline telephony to allow tone dialling using a small keypad on a telephone or handset, but has been used in amateur radio to remotely control repeaters, autopatch, IRLP or Echolink nodes.

			'''Dual Band Antenna''' : An antenna designed to be used on two amateur [[Bands]].

	'''[[Dummy load \|Dummy Load]]''' : An artificial [[Antennas \|antenna]] that does not radiate. A non-inductive power resistor, a dummy load is connected in place of the transmitting antenna and used when aligning transceivers.		'''[[Dummy load \|Dummy Load]]''' : An artificial [[Antennas \|antenna]] that does not radiate. A non-inductive power resistor, a dummy load is connected in place of the transmitting antenna and used when aligning transceivers.

	'''Duplex''' : Transmit and receive are on two different frequencies - often use in repeaters with a shift (difference) of 600Hz.		'''Duplex''' : Transmit and receive are on two different frequencies - often use in repeaters with a shift (difference) of 600Hz.

			'''Duplexer''' : A device that allows an antenna to transmit and receive simultaneously.

			'''DVM''' : Digital voltmeter.

	'''[[DXCC]]''' : DX Century Club		'''[[DXCC]]''' : DX Century Club
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	'''[[DXpedition]]''' : An expedition by amateurs to a location that may be geographically or physically remote and from where amateur contacts are rare.		'''[[DXpedition]]''' : An expedition by amateurs to a location that may be geographically or physically remote and from where amateur contacts are rare.

			'''Dynamic Range''' : How well a receiver can handle very strong signals wthout overloading.

TimVK4YEH: drm

2009-06-30T10:02:09Z

drm

← Older revision		Revision as of 03:02, 30 June 2009
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	'''[http://www.qsl.net/zl1bpu/DOMINO/Index.htm Domino EX]''' : a digital [[Modes \| mode]] that uses a variant of MFSK known as IFK for transmission of information.		'''[http://www.qsl.net/zl1bpu/DOMINO/Index.htm Domino EX]''' : a digital [[Modes \| mode]] that uses a variant of MFSK known as IFK for transmission of information.

			'''DRM''' : Digital Radio Mondiale. A system of digital broadcasting developed by a consortium of manufacturers, researchers, broadcasters and governments.

	'''[[DTMF]]''' Dual Tone Multi Frequency - the allocation of a unique tone pair to each button on an appliance (made up of two frequencies - high and low) that allows a computer to recognize the tone. Originally used on a wide scale in landline telephony to allow tone dialling using a small keypad on a telephone or handset, but has been used in amateur radio to remotely control repeaters, autopatch, IRLP or Echolink nodes.		'''[[DTMF]]''' Dual Tone Multi Frequency - the allocation of a unique tone pair to each button on an appliance (made up of two frequencies - high and low) that allows a computer to recognize the tone. Originally used on a wide scale in landline telephony to allow tone dialling using a small keypad on a telephone or handset, but has been used in amateur radio to remotely control repeaters, autopatch, IRLP or Echolink nodes.

Carlb: /* D */

2009-06-18T14:12:41Z

← Older revision		Revision as of 07:12, 18 June 2009
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	''' De or DE''' : "this is" or "from" - for example an operator may use VL2TK de VK4ZW .......		''' De or DE''' : "this is" or "from" - for example an operator may use VL2TK de VK4ZW .......

			'''DF''' : Direction finding. Also known as "fox hunting", the use of triangulation and directional antennas to find a hidden transmitter. May be done recreationally, or as a means of locating the source of problematic radio frequency interference.

	'''[[Dipole]]''' : An antenna with two sides, usually of equal length.		'''[[Dipole]]''' : An antenna with two sides, usually of equal length.

TimVK4YEH: /* D */

2009-06-15T07:39:05Z

← Older revision		Revision as of 00:39, 15 June 2009
Line 26:		Line 26:
	'''[http://www.qsl.net/zl1bpu/DOMINO/Index.htm Domino EX]''' : a digital [[Modes \| mode]] that uses a variant of MFSK known as IFK for transmission of information.		'''[http://www.qsl.net/zl1bpu/DOMINO/Index.htm Domino EX]''' : a digital [[Modes \| mode]] that uses a variant of MFSK known as IFK for transmission of information.

	'''DTMF''' Dual Tone Multi Frequency - the allocation of a unique tone pair to each button on an appliance (made up of two frequencies - high and low) that allows a computer to recognize the tone. Originally used on a wide scale in landline telephony to allow tone dialling using a small keypad on a telephone or handset, but has been used in amateur radio to remotely control repeaters, autopatch, IRLP or Echolink nodes.		'''[[DTMF]]''' Dual Tone Multi Frequency - the allocation of a unique tone pair to each button on an appliance (made up of two frequencies - high and low) that allows a computer to recognize the tone. Originally used on a wide scale in landline telephony to allow tone dialling using a small keypad on a telephone or handset, but has been used in amateur radio to remotely control repeaters, autopatch, IRLP or Echolink nodes.

	'''[[Dummy load \|Dummy Load]]''' : An artificial [[Antennas \|antenna]] that does not radiate. A non-inductive power resistor, a dummy load is connected in place of the transmitting antenna and used when aligning transceivers.		'''[[Dummy load \|Dummy Load]]''' : An artificial [[Antennas \|antenna]] that does not radiate. A non-inductive power resistor, a dummy load is connected in place of the transmitting antenna and used when aligning transceivers.

Carlb at 21:42, 12 June 2009

2009-06-12T21:42:20Z

← Older revision		Revision as of 14:42, 12 June 2009
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	~~<table width~~=~~"750" border~~=~~"1" cellpadding~~=~~"6">~~		{{glossary}}
	~~<tr>~~
	~~<td>~~[[~~Dictionary of Ham Radio Terms~~ \| A]] ~~</td>~~
	~~<td>~~[[B]]~~</td>~~		==D==
	~~<td>~~[[C]]~~</td>~~
	~~<td>~~[[D]]~~</td>~~		'''DAC''' : Also known as D/A and D-to-A. Digital to Analogue converter. A device that converts digital signals into analouge signals.
	~~<td>~~[[E]]~~</td>~~
	~~<td>~~[[F]]~~</td>~~		'''dB''' : [[Decibels \|Decibel]] - the ratio of two power measurements.
	~~<td>~~[[G]]~~</td>~~
	~~<td>~~[[H]]~~</td>~~		'''dBd''' : dB relative to a dipole. Also known as [[Gain#Gain_compared_to_a_half_wave_dipole_-_dBD \|dBD]]
	~~<td>~~[~~[I]]<~~/~~td>~~
	~~<td>[[J]]<~~/~~td>~~		'''[[Gain#Gain_compared_to_an_isotropic_readiator_.3D_dBi \|dBi]]''' : dB relative to a theoretical isotropic (point) source.
	~~<td>[[K]]<~~/~~td>~~
	~~<td>[[L]]<~~/~~td>~~		'''[[Radiated Power Measurement \| dBm]]''': The power compared to a 1 milliwatt (1mW) source, expressed in decibels (dB)
	~~<td>[[M~~]~~]</td>~~
	~~<td>~~[[N]]~~</td>~~		'''dBo''' : Optical gain. An unofficial term used by some amateurs working with transmission of data using light.
	~~<td>[[O]]</td>~~
	~~<td>[[P]]</td>~~		'''dBuv''' : a measure of voltage compared to one microvolt. 0dBuv = one microvolt.
	~~<td>[[Q]]</td>~~
	~~<td>~~[[R]]~~</td>~~		''' De or DE''' : "this is" or "from" - for example an operator may use VL2TK de VK4ZW .......
	~~<td>~~[[S]]~~</td>~~
	~~<td>[[T]]</td>~~		'''[[Dipole]]''' : An antenna with two sides, usually of equal length.
	~~<td>[[U]]</td>~~
	~~<td>[[V]]</td>~~		'''[[Dish or Parabola \| Dish]]''' : A highly directional [[Antennas\|antenna]], parabolic in shape. Often used at [[Microwave and other bands \|microwave]] frequencies.
	~~<td>~~[[W]]~~</td>~~
	~~<td>[[X]]</td>~~		'''[http://www.qsl.net/zl1bpu/DOMINO/Index.htm Domino EX]''' : a digital [[Modes \| mode]] that uses a variant of MFSK known as IFK for transmission of information.
	~~<td>[[Y]]</td>~~
	~~<td>[[Z]]</td>~~		'''DTMF''' Dual Tone Multi Frequency - the allocation of a unique tone pair to each button on an appliance (made up of two frequencies - high and low) that allows a computer to recognize the tone. Originally used on a wide scale in landline telephony to allow tone dialling using a small keypad on a telephone or handset, but has been used in amateur radio to remotely control repeaters, autopatch, IRLP or Echolink nodes.
	~~<td>~~[[~~0 - 9~~]] ~~</td>~~
	~~</tr>~~		'''[[Dummy load \|Dummy Load]]''' : An artificial [[Antennas \|antenna]] that does not radiate. A non-inductive power resistor, a dummy load is connected in place of the transmitting antenna and used when aligning transceivers.
	~~</table>~~
			'''Duplex''' : Transmit and receive are on two different frequencies - often use in repeaters with a shift (difference) of 600Hz.

			'''[[DXCC]]''' : DX Century Club

			'''DX''' : Distance or distant station. Originally "distant exchange", from landline telephony. On HF radio, normally used to refer to a station on another continent or in an exotic location.

			'''[[DXpedition]]''' : An expedition by amateurs to a location that may be geographically or physically remote and from where amateur contacts are rare.

TimVK4YEH: New page:
2009-06-12T21:23:24Z

New page: <table width="750" border="1" cellpadding="6"> <tr> <td> A </td> <td>B</td> <td>C</td> <td>D</td> <td>E</td> <t...

New page
<table width="750" border="1" cellpadding="6">
<tr>
<td>[[Dictionary of Ham Radio Terms | A]] </td>
<td>[[B]]</td>
<td>[[C]]</td>
<td>[[D]]</td>
<td>[[E]]</td>
<td>[[F]]</td>
<td>[[G]]</td>
<td>[[H]]</td>
<td>[[I]]</td>
<td>[[J]]</td>
<td>[[K]]</td>
<td>[[L]]</td>
<td>[[M]]</td>
<td>[[N]]</td>
<td>[[O]]</td>
<td>[[P]]</td>
<td>[[Q]]</td>
<td>[[R]]</td>
<td>[[S]]</td>
<td>[[T]]</td>
<td>[[U]]</td>
<td>[[V]]</td>
<td>[[W]]</td>
<td>[[X]]</td>
<td>[[Y]]</td>
<td>[[Z]]</td>
<td>[[0 - 9]] </td>
</tr>
</table>

A B C D E