Aufgaben:Exercise 1.1Z: ISDN Connection - Revision history

Maintenance script: Fix interlanguage link: resolve redirect chain

2026-03-16T15:53:25Z

Fix interlanguage link: resolve redirect chain

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	[[Category:Signal Representation: Exercises\|^1.1 Principles of Communication^]]		[[Category:Signal Representation: Exercises\|^1.1 Principles of Communication^]]
	[[de:Aufgaben:1.~~1Z_ISDN~~-Verbindung]]		[[de:Aufgaben:Aufgabe 1.1Z: ISDN-Verbindung]]

Maintenance script: Add German interlanguage link

2026-03-16T12:30:07Z

Add German interlanguage link

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	[[Category:Signal Representation: Exercises\|^1.1 Principles of Communication^]]		[[Category:Signal Representation: Exercises\|^1.1 Principles of Communication^]]
			[[de:Aufgaben:1.1Z_ISDN-Verbindung]]

Hwang at 15:35, 23 January 2023

2023-01-23T15:35:54Z

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	{Which of the statements are true regarding source and transmitter?		{Which of the statements are true regarding source and transmitter?
	\|type="[]"}		\|type="[]"}
	+ The message source is the caller.  The source signal  ${q(t)}$  is the acoustic wave of her ~~voice~~ signal.		+ The message source is the caller.  The source signal  ${q(t)}$  is the acoustic wave of her speech signal.
	+ The unit labelled  "transmitter"  contains, among other things, a signal converter and a modulator.		+ The unit labelled  "transmitter"  contains, among other things, a signal converter and a modulator.
	- The transmitted signal  $s(t)$  is analog.		- The transmitted signal  $s(t)$  is analog.

Guenter at 10:07, 22 May 2021

2021-05-22T10:07:33Z

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	{{quiz-Header\|Buchseite=~~Signaldarstellung~~/~~Prinzip der Nachrichtenübertragung~~}}		{{quiz-Header\|Buchseite=Signal_Representation/Principles_of_communication}}

	[[File:EN_Sig_Z_1_1.png\|right\|frame\|A telephone connection scenario]]		[[File:EN_Sig_Z_1_1.png\|right\|frame\|A telephone connection scenario]]

Guenter at 08:56, 8 April 2021

2021-04-08T08:56:32Z

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	*The message sink is the answering machine.		*The message sink is the answering machine.
	*In an ideal transmission system  $v(t) = {q(t)}$  should apply.		*In an ideal transmission system  $v(t) = {q(t)}$  should apply.
	*However, due to the additive noise term  ${n(t)}$, the attenuation  $\alpha$  and the ~~running~~ time  $\tau$  the following applies here:		*However,  due to the additive noise term  ${n(t)}$,  the attenuation  $\alpha$  and the delay time  $\tau$  the following applies here:
	:$$v(t) = \alpha \cdot q ( t - \tau) + n(t).$$		:$$v(t) = \alpha \cdot q ( t - \tau) + n(t).$$
	*By our definitions, this is a distortion-free system.		*By our definitions, this is a distortion-free system.

Guenter at 08:53, 8 April 2021

2021-04-08T08:53:58Z

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	<quiz display=simple>		<quiz display=simple>
	{Which of the statements are true regarding source and ~~sender~~?		{Which of the statements are true regarding source and transmitter?
	\|type="[]"}		\|type="[]"}
	+ The ~~news~~ source is the caller. The source signal  ${q(t)}$  is the acoustic wave of her voice signal.		+ The message source is the caller.  The source signal  ${q(t)}$  is the acoustic wave of her voice signal.
	+ The unit labelled "transmitter" contains, among other things, a signal converter and a modulator.		+ The unit labelled  "transmitter"  contains, among other things, a signal converter and a modulator.
	- The transmitted signal  $s(t)$  is analog.		- The transmitted signal  $s(t)$  is analog.


	{Which of the statements are true regarding ~~recipients~~ and ~~sinks~~?		{Which of the statements are true regarding receiver and sink?
	\|type="[]"}		\|type="[]"}
	- The received signal  $r(t)$  is digital.		- The received signal  $r(t)$  is digital.
	- The ~~news~~ sink is the telephone set in Hamburg.		- The message sink is the telephone set in Hamburg.
	+ The ~~news~~ sink is the answering machine.		+ The message sink is the answering machine.
	+ The following applies  $v(t) = \alpha \cdot q(t - \tau ) + {n(t)}$.		+ The following applies:  $v(t) = \alpha \cdot q(t - \tau ) + {n(t)}$.
	- There is an ideal transmission system.		- There is an ideal transmission system.

Guenter at 08:49, 8 April 2021

2021-04-08T08:49:11Z

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	''Notes:''  The task shall establish a relation between this real scenario and the functional units of a general communications system mentioned in the [[Signal_Representation/Principles_of_Communication#~~Blockschaltbild_eines_Nachrichten.C3.BCbertragungssystems~~\|theory section]] .		''Notes:''  The task shall establish a relation between this real scenario and the functional units of a general communications system mentioned in the [[Signal_Representation/Principles_of_Communication#Block_diagram_of_a_communications_system\|theory section]] .

Guenter at 08:48, 8 April 2021

2021-04-08T08:48:18Z

← Older revision		Revision as of 10:48, 8 April 2021
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	{{quiz-Header\|Buchseite=Signaldarstellung/Prinzip der Nachrichtenübertragung}}		{{quiz-Header\|Buchseite=Signaldarstellung/Prinzip der Nachrichtenübertragung}}

	[[File:EN_Sig_Z_1_1.png\|right\|frame\|a telephone connection scenario]]		[[File:EN_Sig_Z_1_1.png\|right\|frame\|A telephone connection scenario]]
	We consider the scenario shown in the picture:		We consider the scenario shown in the picture:

	A woman from Munich dials a number in Hamburg with her ISDN phone. However, she cannot reach the person she wants to talk to, so she leaves him a message on tape.		A woman from Munich dials a number in Hamburg with her ISDN phone.  However, she cannot reach the person she wants to talk to, so she leaves him a message on tape.

	The distortion-free connection is fully described by		The distortion-free connection is fully described by
	* an attenuation coefficient   $\alpha$,		* an attenuation coefficient   $\alpha$,
	* a term  $\tau$, and		* a term  $\tau$  and
	* the current signal-to-noise ratio (SNR)		* the current signal-to-noise ratio (SNR).


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	''Notes:''  The task shall establish a relation between this real scenario and the functional units of a general ~~message transmission~~ system mentioned in the [[Signal_Representation/Principles_of_Communication#Blockschaltbild_eines_Nachrichten.C3.BCbertragungssystems\|theory section]] .		''Notes:''  The task shall establish a relation between this real scenario and the functional units of a general communications system mentioned in the [[Signal_Representation/Principles_of_Communication#Blockschaltbild_eines_Nachrichten.C3.BCbertragungssystems\|theory section]] .

Guenter: Guenter moved page Aufgaben:Exercise 1.1Z: ISDN-Connection to Aufgaben:Exercise 1.1Z: ISDN Connection

2021-04-08T08:45:50Z

Guenter moved page Aufgaben:Exercise 1.1Z: ISDN-Connection to Aufgaben:Exercise 1.1Z: ISDN Connection

← Older revision	Revision as of 10:45, 8 April 2021
(No difference)

Javier: Text replacement - "Category:Exercises for Signal Representation" to "Category:Signal Representation: Exercises"

2021-03-23T12:39:40Z

Text replacement - "Category:Exercises for Signal Representation" to "Category:Signal Representation: Exercises"

← Older revision		Revision as of 14:39, 23 March 2021
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	[[Category:~~Exercises for~~ Signal Representation\|^1.1 Principles of Communication^]]		[[Category:Signal Representation: Exercises\|^1.1 Principles of Communication^]]