XLR - Revision history

Brad Johnson at 00:48, 12 May 2017

2017-05-12T00:48:51Z

Brad Johnson at 00:48, 12 May 2017

2017-05-12T00:48:26Z

Brad Johnson at 00:47, 12 May 2017

2017-05-12T00:47:56Z

Brad Johnson at 00:42, 12 May 2017

2017-05-12T00:42:57Z

Brad Johnson at 00:41, 12 May 2017

2017-05-12T00:41:43Z

Brad Johnson at 00:41, 12 May 2017

2017-05-12T00:41:11Z

Brad Johnson at 00:55, 26 November 2014

2014-11-26T00:55:29Z

Brad Johnson at 00:54, 26 November 2014

2014-11-26T00:54:12Z

Brad Johnson at 00:52, 26 November 2014

2014-11-26T00:52:45Z

Brad Johnson at 00:51, 26 November 2014

2014-11-26T00:51:19Z

@@ Line 10: / Line 10: @@
 *The conductor that carries the “non-inverted” (normal [[polarity]]) audio signal is designated the “+,” “high,” or “hot” conductor and is typically connected to Pin 2. Lavry Engineering does not use the designation “Hot” in discussions of balanced signals because of the ambiguity due to the term also being used to describe the “non-ground” signal conductor in [[unbalanced]] connections.
 *The conductor that caries the “inverted” (inverted polarity) audio signal is designated the “-,” “low,” or “cold” conductor and is typically connected to Pin 3. Lavry Engineering does not use the designation “Cold” in discussions of balanced signals because of the ambiguity due to the term also being used to describe the “grounded” signal conductor in unbalanced connections.
-=XLR Adpaters and Adpater Cables=
+=XLR Adapters and Adapter Cables=
 To make an unbalanced connection using an [[adapter]] or [[adapter cable]]s in which one end is an XLR connector; there are multiple configurations of signal/pin connections.
 # In “standard” off-the-shelf adapters or adapter cables made with [[coaxial]] two-conductor cable; Pin 1 and Pin 3 are typically connected to each other; which results in the “-” signal conductor being held at ground voltage potential. Because electrical signals can exist as both a voltage and current; even though the voltage of the signal does not “appear” in the “-” conductor; the signal current does use this conductor as a [[signal return]] to the sending device. In this case, the shield of the coaxial cable acts as both a shield and a signal return.

@@ Line 10: / Line 10: @@
 *The conductor that carries the “non-inverted” (normal [[polarity]]) audio signal is designated the “+,” “high,” or “hot” conductor and is typically connected to Pin 2. Lavry Engineering does not use the designation “Hot” in discussions of balanced signals because of the ambiguity due to the term also being used to describe the “non-ground” signal conductor in [[unbalanced]] connections.
 *The conductor that caries the “inverted” (inverted polarity) audio signal is designated the “-,” “low,” or “cold” conductor and is typically connected to Pin 3. Lavry Engineering does not use the designation “Cold” in discussions of balanced signals because of the ambiguity due to the term also being used to describe the “grounded” signal conductor in unbalanced connections.
-==XLR Adpaters and Adpater Cables
+=XLR Adpaters and Adpater Cables=
 To make an unbalanced connection using an [[adapter]] or [[adapter cable]]s in which one end is an XLR connector; there are multiple configurations of signal/pin connections.
 # In “standard” off-the-shelf adapters or adapter cables made with [[coaxial]] two-conductor cable; Pin 1 and Pin 3 are typically connected to each other; which results in the “-” signal conductor being held at ground voltage potential. Because electrical signals can exist as both a voltage and current; even though the voltage of the signal does not “appear” in the “-” conductor; the signal current does use this conductor as a [[signal return]] to the sending device. In this case, the shield of the coaxial cable acts as both a shield and a signal return.

@@ Line 10: / Line 10: @@
 *The conductor that carries the “non-inverted” (normal [[polarity]]) audio signal is designated the “+,” “high,” or “hot” conductor and is typically connected to Pin 2. Lavry Engineering does not use the designation “Hot” in discussions of balanced signals because of the ambiguity due to the term also being used to describe the “non-ground” signal conductor in [[unbalanced]] connections.
 *The conductor that caries the “inverted” (inverted polarity) audio signal is designated the “-,” “low,” or “cold” conductor and is typically connected to Pin 3. Lavry Engineering does not use the designation “Cold” in discussions of balanced signals because of the ambiguity due to the term also being used to describe the “grounded” signal conductor in unbalanced connections.
 To make an unbalanced connection using an [[adapter]] or [[adapter cable]]s in which one end is an XLR connector; there are multiple configurations of signal/pin connections.
 # In “standard” off-the-shelf adapters or adapter cables made with [[coaxial]] two-conductor cable; Pin 1 and Pin 3 are typically connected to each other; which results in the “-” signal conductor being held at ground voltage potential. Because electrical signals can exist as both a voltage and current; even though the voltage of the signal does not “appear” in the “-” conductor; the signal current does use this conductor as a [[signal return]] to the sending device. In this case, the shield of the coaxial cable acts as both a shield and a signal return.

@@ Line 27: / Line 27: @@
 #Electronic output without automatic sensing- this type of output offers the advantage of the lowest distortion under all operating modes. With this type of output; it is very important to properly configure the output connection so that audio ground is connected to the Pin that will be grounded by the unbalanced connections (typically Pin 3). This is usually accomplished by changing a jumper setting inside the unit or via a setting. These outputs are “ground referenced” as versus “floating;” and by using only one of the two active outputs, the output level is reduced by 6dB for the same output level setting. '''Please note that all Lavry analog balanced outputs are of this design; so it is important to properly configure the output before making unbalanced connections to avoid increased distortion of the audio signal. The outputs are protected against short-circuits; so it is very unlikely that any damage would result if an output is improperly connected; unless operated in this manner for an extended period of time.'''
 ===Digital===
-All Lavry AES/XLR digital inputs and outputs are transformer-coupled. This means that Pin 1 and Pin 3 can be (and should be) connected together in adapters or adapter cables used to make connections to coaxial S-PDIF inputs or outputs. The only exception would be where shielded twisted-pair cable is used in an adapter cable to connect an S-PDIF (unbalanced) output to an AES/XLR input. If the Shield is connected at the XLR end; Pin1 and Pin 3 would not be connected to each other.
+All Lavry [[AES]]/XLR digital inputs and outputs are transformer-coupled. This means that Pin 1 and Pin 3 can be (and should be) connected together in adapters or adapter cables used to make connections to coaxial [[S-PDIF]] inputs or outputs. The only exception would be where shielded twisted-pair cable is used in an adapter cable to connect an S-PDIF (unbalanced) output to an AES/XLR input. If the Shield is connected at the XLR end; Pin1 and Pin 3 would not be connected to each other.
 [http://en.wikipedia.org/wiki/XLR_connector Click here for more detailed information on XLR connectors]

@@ Line 25: / Line 25: @@
 #Transformer-coupled- this type of output is effectively “floating” by nature unless one side or the other (“+” connection or “-” connection) is connected to [[ground]]. It is referred to as “floating” because it is not “tied” to ground electrically. This also means it is OK to ground one of the signal conductor in unbalanced connection. Due to the unique nature of this output, the level is the same whether the output is connected to balanced or unbalanced connections.
 #Electronic output with automatic sensing- this type of output is convenient because a “cross-coupled” circuit allows the amplifier to “sense” when one of the outputs is grounded. This both prevents an active output from trying to drive a “short circuit” caused by connecting it to ground, and boosts the gain of the active (un-grounded) output by 6[[dB]] to compensate for the signal level lost when one-half of the signal is removed by grounding one of the two outputs. Unless care is taken in how one of the two outputs is grounded; the distortion performance of this type of output can be significantly degraded. Even when carefully connected to the best available ground; this type of output cannot achieve the lowest distortion available from electronic outputs that are not “auto-sensing” in design. These outputs are “ground referenced” as versus “floating.”
-#Electronic output without automatic sensing- this type of output offers the advantage of the lowest distortion under all operating modes. With this type of output; it is very important to properly configure the output connection so that audio ground is connected to the Pin that will be grounded by the unbalanced connections (typically Pin 3). This is usually accomplished by changing a jumper setting inside the unit or via a setting. These outputs are “ground referenced” as versus “floating;” and by using only one of the two active outputs, the output level is reduced by 6dB for the same output level setting. '''Please note that all Lavry analog balanced outputs are of this design; so it is important to properly configure the output before making unbalanced connections to avoid increased distortion of the audio signal. The outputs are protected against short-circuits; so it is very unlikely that any damage would result if an output is improperly connected; unless operated in this manner for an extended period of time.
+#Electronic output without automatic sensing- this type of output offers the advantage of the lowest distortion under all operating modes. With this type of output; it is very important to properly configure the output connection so that audio ground is connected to the Pin that will be grounded by the unbalanced connections (typically Pin 3). This is usually accomplished by changing a jumper setting inside the unit or via a setting. These outputs are “ground referenced” as versus “floating;” and by using only one of the two active outputs, the output level is reduced by 6dB for the same output level setting. '''Please note that all Lavry analog balanced outputs are of this design; so it is important to properly configure the output before making unbalanced connections to avoid increased distortion of the audio signal. The outputs are protected against short-circuits; so it is very unlikely that any damage would result if an output is improperly connected; unless operated in this manner for an extended period of time.'''
-'''===Digital===
+===Digital===
 All Lavry AES/XLR digital inputs and outputs are transformer-coupled. This means that Pin 1 and Pin 3 can be (and should be) connected together in adapters or adapter cables used to make connections to coaxial S-PDIF inputs or outputs. The only exception would be where shielded twisted-pair cable is used in an adapter cable to connect an S-PDIF (unbalanced) output to an AES/XLR input. If the Shield is connected at the XLR end; Pin1 and Pin 3 would not be connected to each other.

@@ Line 23: / Line 23: @@
 ===Analog===
 There are three types of balanced analog outputs:
-#Transformer-coupled- this type of output is effectively “floating” by nature unless one side or the other (“+” connection or “-” connection) is connected to [[ground]]. It is referred to as “floating” because it is not “tied” to ground electrically. This also means it is OK to ground either one or the other signal conductor in unbalanced connection. Due to the unique nature of this output, the level is the same whether the output is connected to balanced or unbalanced connections.
+#Transformer-coupled- this type of output is effectively “floating” by nature unless one side or the other (“+” connection or “-” connection) is connected to [[ground]]. It is referred to as “floating” because it is not “tied” to ground electrically. This also means it is OK to ground one of the signal conductor in unbalanced connection. Due to the unique nature of this output, the level is the same whether the output is connected to balanced or unbalanced connections.
 #Electronic output with automatic sensing- this type of output is convenient because a “cross-coupled” circuit allows the amplifier to “sense” when one of the outputs is grounded. This both prevents an active output from trying to drive a “short circuit” caused by connecting it to ground, and boosts the gain of the active (un-grounded) output by 6[[dB]] to compensate for the signal level lost when one-half of the signal is removed by grounding one of the two outputs. Unless care is taken in how one of the two outputs is grounded; the distortion performance of this type of output can be significantly degraded. Even when carefully connected to the best available ground; this type of output cannot achieve the lowest distortion available from electronic outputs that are not “auto-sensing” in design. These outputs are “ground referenced” as versus “floating.”
 #Electronic output without automatic sensing- this type of output offers the advantage of the lowest distortion under all operating modes. With this type of output; it is very important to properly configure the output connection so that audio ground is connected to the Pin that will be grounded by the unbalanced connections (typically Pin 3). This is usually accomplished by changing a jumper setting inside the unit or via a setting. These outputs are “ground referenced” as versus “floating;” and by using only one of the two active outputs, the output level is reduced by 6dB for the same output level setting.

@@ Line 17: / Line 17: @@
 *If the sending end is the unbalanced two-conductor connector; both the shield and the “-” conductor of the pair are connected to the “shield” conductor of the connector. The “+” conductor of the pair is connected to the signal conductor of the connector.
-(b) With the shield NOT connected on the receiving end to reduce hum and noise pick-up. Please note that for safety reasons, it is essential that another form of “ground reference” connection MUST exist between two pieces of equipment that are connected with the shield disconnected at the receiving end. This can be in the form of both pieces having 3 prong (grounded) AC power cables plugged into a common AC power source.
+(b) With the shield NOT connected on the receiving end to reduce hum and noise pick-up or to eliminate a [[ground loop]]. Please note that for safety reasons, it is essential that another form of “ground reference” connection MUST exist between two pieces of equipment that are connected with the shield disconnected at the receiving end. This can be in the form of both pieces having 3 prong (grounded) AC power cables plugged into a common AC power source.
 *If the sending end is the XLR and the receiving end is the unbalanced two-conductor connector; the shield is connected to nothing on the receiving end; and the “-” conductor of the pair is connected to the “shield” connection of the two-conductor connector. The “+” conductor of the pair is connected to the signal conductor of the connector.
 *If the sending end is the unbalanced two-conductor connector; both the shield and the “-” conductor of the pair are connected to the “shield” conductor of this connector. The “+” conductor of the pair is connected to the signal conductor of this connector. The shield is connected to nothing in the XLR connector (receiving end) and the pair is connected to Pin 2 & 3 similar to a balanced connection.