DE2346017C2 - Control device for a switching device for the transmission of communication channels - Google Patents

Description

The invention is explained in greater detail on the basis of figures

35 explained.

The F i g. I shows the principle of the invention The invention relates to a control device applied method on the basis of a block circuit

device for a switching device for the transmission of image. It should be the case that two

Message channels, in particular baseband signals Message channels with signals 51 and 52, respectively

of directional radio transmission links in which a loading 4o is to be transmitted. In the system there are

drive and a substitute channel are available and the operating example only has two channels available,

channel can then be switched to the substitute channel, namely the operating channel BK and the substitute channel

vice versa, if this is related to the communication channel . As usual in such systems, the

orderly pilot signal fails and / or the noise substitute channel is normally used to avoid the

distance in the transmission channel to transmit a certain minimum 45 main signal 51 if the loading

falls below the minimum threshold. drive channel due to pilot failure or excessively high

Especially for such switching devices as they are unusable for a transmission. Then in patent 19 49 373 are described, control devices are required within an imperceptibly short period of time, which fulfill the above-mentioned of only a few microseconds the signal 51 with functions or other additional functions. 50 by means of the switch 1/51 to the substitute channel route. In particular, these requirements will be switched over. The transmission side is placed over the white radio systems, since there the failure of a terminal W connects the signal 51 at the switch US 2, the normal band a considerable disturbance of, for example, the substitute channel with the switch W referring to a large number of telephony channels or television channels. The switches are here as mechanical gnalen can bring about. On the other hand, however, 55 switches should be shown in order to maintain an overview. Each control should be carried out in such a way that, if possible, normally as an electronic switch, e.g. B. used channels not completely lost the message transmission according to the patent 19 49 373 or as a Koaxialschalgung. Trained because of the required Um- ter. These switches are operated by a switching speed corresponding to a central control device StE , a modern trend in this field mostly electrical. channel would lie idle, it can be used for transmission

The invention is based on the object of using a second signal 5 2 of a different type Specify control device that meets these claims. There are therefore two more changeover switches US 2

met and which also gives the possibility of an op- and 1/53, which also work electronically and

maximum channel utilization of a transmission system 65 the replacement channel on the sending and receiving side when incoming

to secure. Switch conveyance to signal 5 2. Also the

In the case of a control device for controlling these changeover contacts, this task is

a switching device for the transmission of downstream control device StE .

3 4

For the use of the operating channel and the establishment A W2 determines that the distance pilot is missing

record channel there are the following options: and opens the contact P 2. Thereupon the

You can use a so-called 1: 1 control device at output 5 3 from a criterion,

the one in which the signal 51 when the operating cable is disturbed, whereby the switch US3 also in the direction

aal is automatically switched to the substitute channel 5 52.

will. The transistors TsZ, Ts3, TsA and TsS are used for the operating channel, however, as long as the transistors for the operation of the switch 51 * the transistors of the substitute channel is in order to evaluate the Ts 9, Ts 10, Ts 11 and Ts 12 for the activation of the NEN the beScarraten criteria PBot available and switch 52. In principle, with normal occupancy the noise is below a certain threshold. There are "operating channel Pl closed, whereby the Transialso in the circuit evaluation devices AW interfering Ts 2 can conduct current and thereby the Tran provides, which evaluate these criteria on the receiving side switch Ts 3 through R 6, Gr 6 beer diameter and communicate 5iE to the control device, the emitter-base path of the transistor Js4

It is also possible to have a so-called pure Er bridged and since Ts 4 is open, it is now over / t J £

set channel operation to be provided. In contrast to 15, a negative voltage at the base of the transistor

In the first mentioned case, Ts 5 is always immediately here. As a result, Ts 5 becomes conductive and its emitter

switched back to the operating channel, when this collector path is on the connection Al trde

is fine again. For the aforementioned case, by applying earth to this contact

the transmission of an additional signal via which US 1 is not switched to the operating channel

occupied replacement channel is only the last mentioned *> The control path for the substitute channel _M is

Operating mode is important because the operating mode is structured in the same way. Are the marked ones

11 an access to the replacement channel often bridges 2 and 3 in switch-through control, so work

would not be possible, since the transistors Ts5 and Ts 12 as Fup-Hop, a. n.

is switched when the operating channel is full again one switches the other in its exhibition

usable is »5 and vice versa. For example, if the pi-

To distinguish whether a normal message lotsigna! IPl is made, the Transisi »« "7 * 2

Sound signal is present or only an additional signal, ™ d Ts 3 currentless. So fal '^ can be present

the pilot signal is used "Im £ t, the transistor Ts4" ^ "^^" ίτηΪΓ

The pilot is omitted from the additional signal, so that through-current for Ts 5 via R «* _ ^ ™;

the evaluation device AWl can recognize whether 3 <> whereby TsS is de-energized LDain this case the

the substitute channel from the signal 51 in claim is made IV10 conductive remains Ts 11 1not partendjmd die

men will or not. If there is no requirement from earth on the ^Ve * ^mdun 8 ^{S. P} ™ S ** VwtL

seldom of the signal 51 before, so can with corresponding- * ™ ** & £ ™ KJ? 5J2E

Corresponding setting of the control device does not guide the bypassing

switches US 2 and US 3 are no longer set to 35 Gr 31

the one in which the additional signal 52 is transmitted via the substitute channel thereby switching the transistor £ * Udurcö and Kgt. The control device then puts the switch USl in the brsatz position

VSZ, Sr <* - _Sc ha, _K , in the S _K " _U " _{8 Ri} ch, "" _BS 2. ^ df Si ^ f «,

SS Discard "the" clogging in the replacement transistor T, 3 via Ji to earth. Now the channel will be required to ensure that single- "JJ * ^ er ^^ S ^"'ftht ^ a high pilot failure in the operating channel occurs, ^{una K} '~% "~ T" ^ _{"{iihre. nd is} t foiic ρ l almost always associated with total failure of the line 45 is because Γ * 2 is still live fa Is .Fl vor

Replacement channel is possible. The normally connected to contacts 10 and Termination 8 ground contact D bt for the over- topto «i ^ ^ J ^^ S

vo "i" _g ", d. "..

that the working channel is OK and contact is caused by excessive noise in the working channel, i.e.

B 2 not closed. Earth via G1 to point 4, this is how this earth becomes

As a result, the otherwise via Gr 13 is always via the diodes Gr 12 also at point .Y and via

adjacent earth at the intersection point X weggenom- Gr 16 also effective at point Xl, whereby the

.en. Now that Ts 2 is live, 5 of the same processes can be triggered as before.

R 16 a current based on the transistor Ts 6 described for the pilot failure Pl,

gen and through this. At the contact T he In the event that not then already a drop

appears to earth and switches, as is to be done on the basis of the additional transmission, if in the

I-1 µ. ι already stated, the switch US2 on the drive channel excessive noise is present, the pilot

/ u ^ aizsignal S2 around. However, since the pilot signal P 2 from io is still present, the bridge 1 must be

AH 2 is omitted, the otherwise via Gr 15 will also be removed. As a result, the earth can then

iii the point Xl supplied earth ineffective and clock 4 via the rectifier Gr 12 not on the

ul ν ι R17 can now also reach through a through-current on point .Y and since the transistor Ts 2

> !; i-! iasis of Ts 7 get. The transistor Ts 7 still carries current, the transi-

^, hold out and connect S3 to earth, which also interferes with 15 Ts 6 and Ts 7.

dc I Jmschalters VS 3 in Fi g, 1 to the line for the bridges 2 and 3 in the circuit diagram are used for the

/ additional signal is transferred. already explained in more detail the purposes of the operating cases as

I now allt out the pilot signal in the operating channel BK , pure substitute channel switching or a so-called

μ - w ill P1 remove the earth from connection 2 again - 1: 1 operation and are, as indicated in the circuit

nicii. This means requesting the replacement channel 20 to insert. For the one described here in more detail

ι in r di the operating channel and thus the request

/ to discard the additional transmission in the replacement ca- Bridge2 inserted case of importance, as already

r, a! This also happens because the transit is now explained.

, i, n Ts2 is de-energized and thus also the transi- The other functional possibilities of the controller Ts6 and Ts7, because these do not receive »5, some are advantageously simply possible, eg by switching current through R 16 and R 17. The resulting insertion of the bridges 3 for 1: 1 operation. If the following switching back from US 2 and US 3 is not inserted in any of the bridges 2 or 3, then the I 1 ü, 1 causes the pilot signal to appear again on AW 2 via the control device with an additional evaluation switch P 2. As already described, ^f means ÜR the signals even as a kind of Diver Then, when the transistor Ts 9 are used energized and in 30 sity switch, with ständigei subsequently also Ts 12. About S2 is then switching as to the respectively better channel or ! rvtzkanal switched on for the transmission of SfI. Combinator, with transfer to the operating channel If the request for the replacement channel and replacement channel comes at the same time.

For this purpose 2 sheets of drawings

Claims (2)

Directional channels, in particular baseband signals of patent claims: Directional radio transmission links, in which there is an operating and a replacement channel and the operating channel 1. Control device for a switching device can then be switched to the substitute channel and vice versa transmission of news channels, in particular if the special Baiisband signals assigned to the night channel from directional radio pilot signal fails and / or the Geraaschaostand un transmission routes, in which an operating and a Transmission channel eme a certain minimum speed substitute channel is present and the operating channel then falls below, ^ in particular for a switchover to the substitute channel is end vice versa. device according to patent 1949373, according to the invention, if the night channel assigned * ° solved by the fact that another switching device called pilot signal fails and / or the noise is provided that the replacement channel for a different distance in the transmission channel a certain message signal in The free state of the spare channel falls below the minimum threshold, thereby generally making it available and that, for the sake of identification, indicates that a further switching element of such a channel is provided in the otherwise existing direction, which omits the substitute channel for * 5 lot, but that the further switching element another message signal in the free state device automatically provides the substitute channel function of the substitute channel and puts it back into operation if the operator recognizes such a channel, the anson channel and / or the substitute channel, the requirement for the most existing pilot is omitted. to activate this channel in the form After that, the further switching device is then auto- *> directional signal with pilot. Because the substitute channel function is automatically set again in the active control device, if the operating channel and / is seen, the otherwise unused or the substitute channel can make the request for the free substitute channel available for other purposes Channel can be provided in the form of a message, for example, for measuring purposes for the test signal with pilot. * 5 Detection of transmission errors or for the 2. Control device according to claim 1, characterized in the transmission of additional messages. The replacement cover indicates that the dropping of the additional channel function as such is not prevented in the replacement channel when the shaft is pulled. only the noise criterion as a requirement is advantageous to discard the additional occupancy command for the switchover occurs, the pilot will prevent each 3o in the substitute channel if only that is still there. Noise criterion as a request command for the Shift occurs but the pilot is still present.