DK151998B

DK151998B - PROCEDURE FOR CONTROLING AN INFORMATION STATION AND CONNECTION TO EXECUTING THE PROCEDURE

Info

Publication number: DK151998B
Application number: DK380979AA
Authority: DK
Inventors: Adolf Haass
Original assignee: Siemens Ag
Priority date: 1978-09-13
Filing date: 1979-09-12
Publication date: 1988-01-18
Also published as: EP0009592A1; BR7905845A; DE2839875A1; ATE119T1; NO148014C; DK151998C; NO792909L; DK380979A; EP0009592B1; DE2839875C2; NO148014B

Abstract

1. Method for testing a communications station which can be selectively set in a test state or in an operating state, in accordance with which, in the operating state (Fig. 1), an item of communication (n) is conducted in duplex operation via a two-wire line (L) to another communications station, whereupon a simulated signal (ns) is obtained and compared with the received signal (es) and in this way a comparison signal (vs) is obtained and conducted to the receiver (EM), and in accordance with which the comparison signal (vs) is compared with a constant reference signal (rf) and in this way a regulating signal (rs) is obtained with the aid of which the simulated signal (ns) is automatically adjusted in such a way that the transmitted item of communication (n) does not exert a disturbing influence in the receiver (EM) of the particular communications station (Fig. 1), characterized in that in the test state (Fig. 2) the simulated signal (ns) is compared with the item of communication (n) and with the aid of the regulating signal (rs) obtained in this way the simulated signal (ns) is automatically adjusted in such a way that the item of communication (n) emitted from the particular station is received by the receiver (EM) of the station.

Description

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Opfindelsen angår en fremgangsmåde til kontrol af en informationsstation , der valgfrit kan bringes i en kontroltilstand eller i en driftstilstand, hvor en information i driftstilstanden ledes til en anden informationsstation i dupleksdrift over en totrådsled-5 ning, hvor der udvindes et efterlignet signal, som sammenlignes med det modtagne signal, og der udvindes et sammenligningssignal, son tilføres modtageren, og hvor sammenligningssignalet sammenlignes med et konstant referencesignal, og der udvindes et reguleringssignal, ved hjælp af hvilket det efterlignede signal automatisk ind-10 stilles således, at den sendte information ikke indvirker forstyrrende i den egne informationsstations modtager.The invention relates to a method for controlling an information station which can be optionally brought into a control state or in an operating state, where an information in the operating state is directed to another information station in duplex operation over a two-wire line, where a mimicked signal is recovered, which is compared. with the received signal and a comparison signal is extracted, then the receiver is applied and where the comparison signal is compared with a constant reference signal and a control signal is obtained by means of which the simulated signal is automatically set so that the transmitted information does not affect disruptive in the receiver of the own information station.

Efterprøvningen af en informationsstation - eksempelvis ved indlægning af en kontrolsløjfe i denne informationsstations område - er specielt meningsfyldt, 15 hvis så mange bestanddele af denne informationsstation som muligt kontrolleres. Jo større andelen af dele i informationsstationen, der ikke omfattes af kontrollen, er, desto større er sandsynligheden for, at en defekt ikke erkendes.The testing of an information station - for example, by inserting a control loop into the area of this information station - is especially meaningful if as many components of this information station as possible are checked. The greater the proportion of parts of the information station that are not covered by the control, the greater the likelihood of a defect not being recognized.

20 Opfindelsen tager sigte på at angive en frem gangsmåde, som muliggør en kontrol af så mange dele som muligt af en informationsstation.The invention aims to provide a method which allows the control of as many parts as possible of an information station.

Denne opgave løses ifølge opfindelsen ved, at i kontroltilstanden bliver det efterlignede signal 25 sammenlignet med informationen, og med det derved udvundne reguleringssignal indstilles det efterlignede signal automatisk således, at den af den egne station sendte information modtages med den egne stations modtager.This task is solved according to the invention in that in the control state the mimicked signal 25 is compared with the information, and with the control signal thus obtained, the mimicked signal is automatically set so that the information sent by the own station is received with the receiver of the own station.

30 Fremgangsmåden ifølge opfindelsen udmærker sig ved, at den muliggør kontrol af alle væsentlige dele i informationsstationen, navnlig kontrol af de dele, ved hjælp af hvilke det efterlignede signal udvindes og ef-terreguleres. Fremgangsmåden udmærker sig endvidere ved, 35 at den er realiserbar med et praktisk taget negligerbart ringe teknisk opbud.The method according to the invention is characterized in that it enables control of all essential parts of the information station, in particular control of the parts by which the mimic signal is extracted and controlled. The process is further characterized by its being achievable with a practically negligible low technical tender.

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22

Hvis differensen mellem det efterlignede signal og det modtagne signal signaleres med sainmenlignings-signalet, er det hensigtsmæssigt, at tilførslen af det modtagne signal blokeres i kontroltiIstanden, således at 5 det efterlignede signal er lig med sammenligningssignalet. På denne måde kontrolleres altså også funktionen af en sammenligningsindretning, ved hjælp af hvilken sammenligningssignalet udvindes.If the difference between the emulated signal and the received signal is signaled by the comparison signal, it is preferable that the input of the received signal be blocked in the control state so that the emulated signal is equal to the comparison signal. In this way, therefore, the function of a comparison device is also controlled by means of which the comparison signal is extracted.

Til særlig rationel udførelse af fremgangsmåden 10 er det ifølge opfindelsen hensigtsmæssigt, at der findes en efterligningskobling, som får tilført informationen, og som afgiver det efterlignede signal, at der findes en sammenligningsindretning, der i driftstilstanden i afhængighed af det efterlignede signal og i afhængighed af 15 det modtagne signal frembringer sammenligningssignalet, at der findes en diskriminator, som over sin udgang afgiver reguleringssignalet, der angiver differensen mellem de signaler, som påtrykkes dens første indgang hhv. dens anden indgang, at der findes en første kobler, 20 som i driftstilstanden indtager en første koblerstilling, ved hvilken det konstante referencesignal tilføres den første indgang på diskriminatoren, og som i kontroltilstanden indtager en anden koblerstilling, ved hvilken informationen tilføres den første indgang på diskrimina- i 25 toren, at der findes en anden kobler, som i driftstil- : standen indtager en første koblerstilling, over hvilken sammenligningssignalet tilføres den anden indgang på diskriminatoren, og som i kontroltilstanden indtager en anden koblerstilling, ved hvilken det efterlignede sig- 30 nal tilføres den anden indgang på diskriminatoren. iFor a particularly rational embodiment of the method 10, according to the invention, it is appropriate to have a mimic coupling which is fed to the information and which emits the simulated signal that there is a comparison device which, in the operating state, depends on the mimic signal and depending on the simulated signal. In the signal received, the comparison signal produces a discriminator which, over its output, outputs the control signal indicating the difference between the signals applied to its first input respectively. its second input, that there is a first coupler 20, which in the operating state assumes a first coupler position, at which the constant reference signal is applied to the first input of the discriminator and which in the control state occupies a second coupler position, at which the information is supplied to the first input of discriminators - in the tower, there is a second coupler which in the operating state occupies a first coupler position, over which the comparison signal is applied to the second input of the discriminator and which in the control state occupies a second coupler position at which the mimicked signal is added to the second input of the discriminator. in

Udførelseseksempler ifølge opfindelsen er i det i følgende forklaret nærmere under henvisning til tegnin- i gen, hvor ens genstande, som er vist i flere figurer, | er forsynet med ens henvisninger, og hvor 35 fig. 1 viser et blokdiagram, på grundlag af hvilket en informationsstations driftstilstand forklares, fig. 2 et blokdiagram, på grundlag af hvilket in-Embodiments of the invention are explained in more detail below with reference to the drawing, wherein like objects shown in several figures | are provided with similar references, and in which FIG. 1 shows a block diagram on the basis of which the operating state of an information station is explained; FIG. 2 is a block diagram on the basis of which

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3 formationsstationens kontroltilstand forklares, fig. 3 og 4 principielle fremstillinger af koblinger til realisering af fremgangsmåden, fig. 5 og 6 udførelseseksempler på koblinger til 5 realisering af fremgangsmåden ved overvejende digital bearbejdning af de optrædende signaler, fig. 7 og 8 koblinger til realisering af fremgangsmåden ved overvejende analog bearbejdning af signalerne , og 10 fig. 9 og 10 særlig hensigtsmæssige udførelses eksempler til realisering af fremgangsmåden.3 explains the control state of the formation station, FIG. Figures 3 and 4 show the principle of couplings for realizing the method; 5 and 6 are exemplary embodiments of couplings for realizing the method of predominantly digital processing of the occurring signals; 7 and 8 are couplings for realizing the method of predominantly analog processing of the signals; and FIGS. 9 and 10 are particularly suitable embodiments for realizing the method.

Fig. 1 viser driftstilstanden af en informationsstation, som over en totrådsledning L er forbundet med en anden, ikke-vist informationsstation i dupleksdrift.FIG. 1 shows the operating state of an information station which is connected over another two-wire line L to another, non-displayed information station in duplex operation.

15 Informationskilden NQ afgiver den information n, der skal overføres. Ved hjælp af en efterligningskobling NA udvindes der et efterlignet signal ns. I en sammenligningsindretning VGL bliver det efterlignede signal ns og det modtagne signal es sammenlignet med 20 hinanden, og der udvindes et sammenligningssignal vs.15 The source of information NQ provides the information n to be transmitted. By means of an imitation coupling NA, a simulated signal ns is obtained. In a comparison device VGL, the simulated signal ns and received signal es are compared to each other and a comparison signal vs

Ved hjælp af sammenligningsindretningen VGL kan navnlig differensen mellem det efterlignede signal ns og det modtagne signal es dannes. Ved hjælp af en dis-kriminator DIS bliver sammenligningssignalet vs og 25 et konstant referencesignal rf sammenlignet med hinanden, og der afledes et reguleringssignal rs, ved hjælp af hvilket det efterlignede signal ns automatisk indstilles således, at den sendte information n ikke indvirker generende i den i fig. 1 viste informationssta-30 tions modtager EM.In particular, by means of the comparison device VGL, the difference between the emulated signal ns and the received signal es can be formed. By means of a discriminator DIS, the comparison signal vs and 25 is a constant reference signal rf compared to one another, and a control signal rs is derived by which the mimicked signal ns is automatically set so that the transmitted information n does not interfere in the in FIG. 1, receiver station EM.

Informationen n kan være digital og navnlig binær. Der kan imidlertid også være tale om en analog information, eksempelvis et talesignal.The information n can be digital and especially binary. However, it may also be an analog information, such as a voice signal.

Fig. 2 viser informationsstationens kontroltil-35 stand. I kontroltilstanden bliver således det efterlignede signal ns i stedet for det i fig. 1 indtegnede sammenligningssignal vs sammenlignet med informationen n i diskriminatoren DIS. Med det derved ud-FIG. 2 shows the control state of the information station. Thus, in the control mode, the mimicked signal ns instead of the one in FIG. 1 plotted comparison signal vs compared to the information n in the discriminator DIS. In so doing,

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4 vundne reguleringssignal rs bliver det efterlignede signal ns automatisk indstillet således, at modtageren EM i den egne station modtager den af denne egne station sendte information n. Medens modtageren i den 5 i fig. 1 viste normale driftstilstand modtager den af en anden, ikke-vist station sendte information, modta-ges( ifølge fig. 2 under varigheden af kontroltilstanden informationen n fra den egne station.4, the emulated signal ns is automatically set so that the receiver EM in the own station receives the information sent by this own station n. While the receiver in the 5 in fig. 1, the information transmitted by another, not shown station, is received (according to Fig. 2 during the duration of the control mode the information n from the own station.

Figurerne 3 og 4 viser principdiagrammer over 10 koblinger til realisering af kontrolfremgangsmåden. Senderen SE omfatter i princippet en spændingskilde SP og en indre modstand Ri. Ved hjælp af senderen SE kan der både foretages en forstærkning og en ledningstilpasning. Efterligningskoblingen NA kan principielt 15 fra tilfælde til tilfælde enten afgive et digitalt eller et analogt efterlignet signal ns. Reguleringssignalet rs er almindeligvis digitalt, hvis efterligningskob-lingen NA ligeledes arbejder digitalt. Hvis efterligningskoblingen NA arbejder analogt, kan regulerings-20 signalet rs enten være analogt eller digitalt. Ved hjælp af diskriminatoren DIS bestemmes differensen mellem de signaler, som ligger på indgangene a og b.Figures 3 and 4 show principle diagrams of 10 couplings for realizing the control method. The transmitter SE comprises in principle a voltage source SP and an internal resistance Ri. Using the transmitter SE, both a gain and a wire adjustment can be made. The mimic coupling NA can in principle, on a case-by-case basis, either output a digital or an analog mimicked signal ns. The control signal rs is usually digital if the mimic coupling NA also works digitally. If the mimic coupling NA works analogously, the control signal rs can be either analog or digital. Using the discriminator DIS, the difference between the signals located on the inputs a and b is determined.

Som sammenligningsindretning VGL findes der almindeligvis en additionsindretning, ved hjælp af hvilken 25 differensen mellem det efterlignede signal ns og det modtagne signal es bestemmes. Ved korrekt drift skal summen af det efterlignede signal ns og det modtagne signal es datasignalmæssigt være lig 0. Hvis dette er tilfældet, indvirker den sendte information n ikke 30 forstyrrende i modtageren EM på den egne i fig. 3 viste informationsstation.As the comparator VGL, there is usually an addition device by which the difference between the mimicked signal ns and the received signal es is determined. In proper operation, the sum of the emulated signal ns and the received signal es data signal must be equal to 0. If this is the case, the transmitted information n does not interfere with the receiver EM on its own in FIG. 3.

De to koblere SW1 og SW2 indtager under varigheden af den normale driftstilstand de med optrukne linier indtegnede koblerstillinger, der er betegnet med i 35 henvisningen 1. Under varigheden af kontroltilstanden bringes de to koblere til deres andre koblerstillinger, som er vist med punkterede linier og betegnet med henvisningen 0. Under varigheden af driftstilstanden fårThe two couplers SW1 and SW2 occupy during the duration of the normal operating state the coupled positions indicated by drawn lines, which are indicated in the reference 1. During the duration of the control mode, the two couplers are brought to their other coupler positions, which are shown in dotted lines and denoted with the reference 0. During the duration of the operating state gets

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5 diskriminatoren DIS’s indgang a over koblingspunktet PI tilført et konstant referencesignal rf. Indgangen b på diskriminatoren modtager sammenligningssignalet vs. Reguleringssignalet rs signalerer forskellen mel-5 lem de diskriminatorens indgang tilførte signaler og indstiller automatisk efterligningskoblingen NA således, at det gunstigste efterlignede signal ns fremkommer.5 the discriminator DIS's input a over the switching point PI supplied a constant reference signal rf. The input b of the discriminator receives the comparison signal vs. The control signal rs signals the difference between the signals supplied by the discriminator input and automatically adjusts the mimic coupling NA so that the most favorable mimic signal ns appears.

Dette efterlignede signal ns er under varigheden af driftstilstanden imidlertid kun virksom i sammenlignings-10 indretningen VGL.However, this mimicked signal ns, during the duration of the operating state, only operates in the comparator VGL.

I kontroltilstanden får indgangen a på diskriminatoren DIS over koblingspunkterne P3, P2 og over kobleren SW1 tilført informationen n. Indgangen b på diskriminatoren modtager over kobleren SW2 det ef-15 terlignede signal ns. Ved hjælp af diskriminatoren DIS bestemmes nu differensen mellem informationssignalet n og det efterlignede signal ns, og det tilsvarende reguleringssignal rs tilføres efterligningskoblingen NA. Hvis informationskilden NQ, senderen SE, 20 efterligningskoblingen NA, diskriminatoren DIS, modtageren EM og de tilhørende forbindelsesledninger er i orden, modtages under kontroltilstanden informationen n i modtageren EM. Modtageren EM bliver således udover sin sædvanlige' funktion under kontroltilstanden 25 benyttet til kontrol af informationsstationen.In the control state, the input a of the discriminator DIS above the switching points P3, P2 and over the switch SW1 is supplied with the information n. By means of the discriminator DIS, the difference between the information signal n and the mimicked signal ns is now determined and the corresponding control signal rs is applied to the mimic coupling NA. If the information source NQ, the transmitter SE, the mimic coupling NA, the discriminator DIS, the receiver EM and the associated connection wires are in order, the information n in the receiver EM is received during the control state. The receiver EM is thus used in addition to its usual function during the control mode 25 for controlling the information station.

I det i fig. 3 viste tilfælde er koblingspunktet P2 forbundet med forbindelsespunktet P3 mellem spændingskilden SP og den indre modstand Ri. I koblinger, som udføres i praksis, kan der mellem informationskilden 30 NQ og punktet P3 findes yderligere netværk, som ikke er vist i fig. 3. Principielt ville det være muligt at tilslutte punktet P2 et vilkårligt andet punkt, som er beliggende mellem informationskilden NQ og forbindelsespunktet P3. Den viste forbindelse af de to punkter 35 P2 og P3 har imidlertid den fordel, at der herved også sker en kontrol af funktionen af senderen SE.In the embodiment of FIG. 3, the coupling point P2 is connected to the connection point P3 between the voltage source SP and the internal resistance R 1. In connections which are carried out in practice, additional networks may be found between the information source 30 NQ and the point P3 which are not shown in FIG. 3. In principle, it would be possible to connect the point P2 to any other point located between the information source NQ and the connection point P3. However, the shown connection of the two points 35 P2 and P3 has the advantage that a function of the transmitter SE is also checked.

Den i fig. 4 viste kobling adskiller sig kun fra den i fig. 3 viste kobling ved en noget anderledes ud-The FIG. 4 differs only from that shown in FIG. 3 in a somewhat different embodiment.

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6 førelse af kobleren SW2. Det forudsættes, at der som sammenligningsindretning VGL findes en additionsindretning, ved hjælp af hvilken differensen mellem de på indgangen tilførte signaler ns og es bestemmes. Hvis 5 den i fig. 4 viste kobler SW2 i kontroltilstanden indtager den punkteret viste koblerstilling, blokeres tilførslen af modtagesignalet es til sammenligningsindretningen VGL. Uden tilførsel af det modtagne signal er sammenligningssignalet vs imidlertid lig med det 10 over indgangen tilførte efterlignede signal ns. I kontroltilstanden bliver således i fig. 4, ligesom det allerede er beskrevet i forbindelse med fig. 3, det efterlignede signal ns tilført indgangen b på diskri-minatoren DIS. Den i fig. 4 viste kobling udmærker sig 15 ved, at også funktionen af sammenligningsindretningen VGL kontrolleres foruden funktionerne af de øvrige dele på informationsstationen.6 operation of the coupler SW2. It is assumed that, as a comparator VGL, there is an addition device by which the difference between the signals ns and es applied to the input is determined. If the embodiment of FIG. 4, the SW2 shown in the control state assumes the dotted coupling position shown, the supply of the receive signal ace to the comparator VGL is blocked. However, without supplying the received signal, the comparison signal vs is equal to the mimicked signal ns applied across the input. Thus, in the control mode, in FIG. 4, as already described in connection with FIG. 3, the mimic signal ns applied to the input b of the discriminator DIS. The FIG. 4 is characterized in that the function of the comparator VGL is also controlled in addition to the functions of the other parts of the information station.

Hvis der som sammenligningsindretning findes en additionsindretning, kan denne enten bevirke en addi-20 tion eller en subtraktion af de to på indgangen tilførte signaler ns hhv. es. I afhængighed af polariteten af disse signaler skal imidlertid i hvert tilfælde differensen mellem de to signaler bestemmes. De i figurerne 3 og 4 viste modtagere EM kan enten arbejde 25 digitalt eller analogt, alt efter om de får tilført digitalsignaler eller analogsignaler.If, as a comparison device, an addition device is present, it can either cause an addition or a subtraction of the two signals ns respectively applied to the input. es. However, depending on the polarity of these signals, in each case the difference between the two signals must be determined. The receivers EM shown in Figures 3 and 4 can either work digitally or analogously, depending on whether they are supplied with digital signals or analog signals.

Koblerne SW1 og SW2 kan realiseres ved hjælp af relæer, ved hjælp af tryktaster eller ved hjælp af : halvlederkoblere, navnlig ved hjælp af FET-halvleder- ' 30 komponenter. Almindeligvis er det hensigtsmæssigt at drive disse to koblere sammenkoblet, således at de vir- j ker som en dobbeltkobler og ved betjening enten begge ! i indtager den med optrukne linier tegnede koblerstilling eller begge indtager den med punkterede linier viste 35 koblerstilling.The switches SW1 and SW2 can be realized by means of relays, by means of pressure keys or by means of: semiconductor couplers, in particular by means of FET semiconductor components. Generally, it is advisable to drive these two couplers together so that they act as a double coupler and when operating either! i occupies the coupler position shown in drawn lines or both occupies the coupler position shown in dotted lines.

Figurerne 5 og 6 viser blokdiagrammer over informationsstationer, hvis komponenter overvejende arbejder digitalt. Det antages altså, at informationskilden HQFigures 5 and 6 show block diagrams of information stations whose components predominantly work digitally. Thus, it is assumed that the information source HQ

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7 afgiver et digitalt signal til en digitalt arbejdende efterligningskobling NA. Denne efterligningskobling afgiver et digitalt efterlignet signal, ns/d, og den reguleres med et digitalt reguleringssignal rs/d. Dis-5 kriminatoren DIS og modtageren EM modtager på indgangen ligeledes digitale signaler.7 gives a digital signal to a digitally working imitation coupling NA. This mimic coupling emits a digitally mimicked signal, ns / d, and it is controlled with a digital control signal rs / d. The DIS-5 criminator DIS and the receiver EM also receive digital signals on the input.

Ved hjælp af en impulsformer IF afledes ud fra informationen n et analogsignal. Med henblik på i koblingspunktet P2 at have et digitalsignal til rådig-10 hed, kræves der derfor en analog/digital-omsætter A/D.Using an impulse converter IF, from the information n an analog signal is derived. Therefore, in order to have a digital signal at the switching point P2, an analog / digital converter A / D is required.

I dette tilfælde ville det være enklere at afbryde den ledende forbindelse mellem punkterne P2 og P3 over analog/digital-omsætteren og at forbinde punkterne P2 og P4 direkte med hinanden på ledende måde. Da det 15 modtagne signal es imidlertid er et analogsignal, er analog/digital-omsætteren A/D nødvendig med henblik på frembringelse af det digitale modtagne signal es/d.In this case, it would be easier to disconnect the conductive connection between points P2 and P3 over the analog / digital converter and to connect points P2 and P4 directly to each other in a conductive manner. However, since the received signal ace is an analog signal, the analog / digital converter A / D is required for generating the digital received signal ace / d.

Den i fig. 6 viste kobling adskiller sig kun fra den i fig. 5 viste ved en anden anbringelse af kobleren 20 SW2.The FIG. 6 differs only from that shown in FIG. 5 showed by a second arrangement of the coupler 20 SW2.

Figurerne 7 og 8 refererer til koblinger, der overvejende arbejder analogt. Der forudsættes igen en digital information n, der imidlertid ved hjælp af impulsformeren IF omsættes til et analogsignal. Efter-25 ligningskoblingen NA arbejder analogt og afgiver det analoge efterlignede signal ns/a. Det modtagne signal es tilføres modtageforstærkeren EV, over hvis udgang der igen afgives et analogsignal. Over begge indgange på sammenligningsindretningen VGL ligger der således 30 analogsignaler, og der forudsættes en analogt arbejdende sammenligningsindretning VGL. Også modtageren EM og diskriminatoren DIS får tilført analogsignaler.Figures 7 and 8 refer to couplings which work predominantly by analogy. Again, a digital information n is assumed, which, however, is converted to an analog signal by means of the pulse converter IF. The simulation coupling NA works analogously and outputs the analog mimic signal ns / a. The received signal ace is applied to the receiving amplifier EV, over whose output an analog signal is again output. Thus, over both inputs of the comparator VGL there are 30 analog signals and an analog operating comparator VGL is assumed. Analog signals are also supplied to the receiver EM and the discriminator DIS.

Det af diskriminatoren afgivne reguleringssignal rs kunne principielt enten være et digitalsignal eller et 35 analogsignal. Det ville være muligt, at der mellem sammenligningsindretningen VGL og modtageren EM er indkoblet en yderligere diskriminator DIS2, som reagerer på to eller flere tærskelværdier, hvorimod diskriminato-The control signal emitted by the discriminator could, in principle, be either a digital signal or an analog signal. It would be possible that between the comparison device VGL and the receiver EM an additional discriminator DIS2 is reacted which responds to two or more threshold values, whereas the discriminator

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8 ren DIS kun reagerer på en enkelt tærskelværdi.8 pure DIS only responds to a single threshold.

Figurerne 7 og 8 adskiller sig kun fra hinanden ved anbringelsen af kobleren SW2.Figures 7 and 8 differ only in the arrangement of coupler SW2.

Figurerne 9 og 10 viser blokdiagrammer over in-5 formationsstationer, hvis komponenter arbejder dels digitalt, dels analogt. Disse to koblinger udmærker sig ved særlig ringe tekniske opbud. Der forudsættes igen en digital information n og en digitalt arbejdende efterligningskobling NA. Det digitale efterlignede 10 signal ns/d bliver ved hjælp af digital/analog-om-sætteren D/A omsat til et analogt efterlignet signal ns/a. Da det modtagne signal es igen er et analogsignal, og der også over udgangen på modtageforstærkeren EV afgives et analogsignal, bliver i sammenlig-15 ningsindretningen VGL to analogsignaler sammenlignet med hinanden, og der afgives et analogt sammenlignings-signal til indgangen b på diskriminatoren DIS. Indgangen a på diskriminatoren får under kontroltilstanden ligeledes tilført et analogt signal, men over ud-20 gangen på diskriminatoren DIS afgives nu et digitalt reguleringssignal rs. På lignende måde som i det i fig. 7 viste tilfælde kan der mellem sammenlignings-indretningen VGL og modtageren EM være mellemkoblet en yderligere diskriminator. De i figurerne 9 og 10 25 viste koblinger adskiller sig kun fra hinanden ved den forskellige indkobling af kobleren SW2.Figures 9 and 10 show block diagrams of information stations whose components operate partly digitally and partly by analogy. These two couplings are characterized by particularly poor technical tenders. Again, a digital information n and a digitally working imitation coupling NA are assumed. The digital mimic signal ns / d is converted by means of the digital / analog converter D / A to an analog mimic signal ns / a. Since the received signal is again an analog signal and also an analogue signal is output over the output of the receiving amplifier EV, in the comparison device VGL two analog signals are compared to each other and an analog comparison signal is output to the input b of the discriminator DIS. During the control mode, the input a of the discriminator is also supplied with an analog signal, but over the output of the discriminator DIS a digital control signal rs is now output. In a similar manner to that of FIG. 7, there can be an additional discriminator between the comparator VGL and the receiver EM. The couplings shown in Figures 9 and 10 25 differ only in the different coupling of the coupler SW2.

jj

Claims

A method of controlling an information station which can optionally be brought into a control state or in an operating state, wherein an information (s) in the operating state (Fig. 1) is directed to another information station in duplex operation over a two-wire line (L), wherein a mimic signal (ns), which is compared to the received signal (es), is extracted and a comparison signal (vs) is obtained, which is applied to the receiver 10 (EM), and the comparison signal (vs) is compared to a constant reference signal (rf) and a control signal (rs) is extracted by which the mimicked signal (s) is automatically set so that the transmitted information (s) does not interfere with the receiver (EM )'s own information station, characterized in that in the control state (Fig. 2), the mimicked signal (ns) is compared to the information (n), and with the resulting control signal (rs), the mimicked signal (ns) is automatically adjusted so that the own station sent information (s) is received with the own station's receiver (EM).

Method according to claim 1, characterized in that in the operating state, the difference between the emulated signal (ns) and the received signal (es) is determined and it is signaled by the comparison signal (vs) and in the control state is blocked. the input of the received signal (es) such that the mimicked signal (ns) is equal to the comparison signal (vs), (Figs. 4, 6, 8, 10).

Coupling for carrying out the method according to claim 1, characterized in that there is a mimicry (NA) which is fed to the information (s) and which gives the simulated signal (s) that a comparator (VGL) exists ) which, in the operating state, depending on the emulated signal (ns) and depending on the received signal (s), produces the comparison signal (vs) that there is a discriminator (DIS) which, over its output, gives off the control signal - DK 151996B light (rs) indicating the difference between the signals being scanned applied to its first input (or its second input (b)) that there is a first coupler (SW1) which in the operating state occupies a first coupler position (1 ), 5 at which the constant reference signal (rfJ is applied to the first input (all of the discriminator) and which in the control state occupies a second switching position (0) at which the information (n) is applied to the first input (a) of the discriminator ( DISI that there fine a second coupler (SW2), which in the operating state assumes a first coupler position (1), over which the comparison signal is applied to the second input (bl on the discriminator (DIS), and which in the control state occupies a second coupler position (0)) at to which the mimicked signal (ns) is applied to the second input (b) of the discriminator (DIS), (FIG. 3).

Coupling for carrying out the method according to claim 1, characterized in that there is a mimic coupling (NA) which is fed to the information (n) and which gives the imitating signal (ns) that a comparator (VGL) exists which, in the operating state depending on the emulated signal (ns) and depending on the received signal (es), produces the comparison signal (vs) that there exists in one discriminator (DIS) which, over its output, emits the re-yellowing signal ( rs), indicating the difference between the signals applied to its first input (a) and (a) respectively. its second input (b) that a first coupler exists; (SW1), which in the operating state assumes a first coupler position (1), to which the constant reference signal I 30 (rf) is applied to the first input (a) of the discriminator I (DIS) and which in the control state occupies a second coupler - a jumper position (0), in which the information (s) is applied to the first input (a) of the discriminator (DIS), that a second switch (SW2) exists in the first switch position (1) of the received signal (es) is applied to the comparator (VGL) and in whose second switching position (0) the input of the received signal (es) to the comparator (VGL) is blocked (Fig. 4). DK 151998 B

Coupling according to claim 3 or 4, characterized in that the information (s) is supplied to the two-wire line (L) over a transmitter (SEJ) and that the transmitter (SE) is given by a series combination of a voltage source (SP) with an internal resistance. (Ri) and that the transmission distance between the information source (NQ) and the connection point (P3) between the voltage source (SP) and the internal resistor (Ri) in the control mode is connected to the first input (al of the discriminator (DISI over the first coupler (SW1I in its 10 second coupling position (0), (Figs. 3-10).