DE1211272B - Remote control device for remote control of additional equalizers for multi-channel carrier frequency wide-area systems - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

GERMAN

PATENT OFFICE

EDITORIAL

Int. Cl .:

H04b

H04m
German class: 21 a2 - 36/13

Number: 1211272

File number: T 28624 VIII a / 21 a2

Filing date: May 20, 1965

Opening day: February 24, 1966

The main patent relates to a remote control device for triggering the automatic adjustment and control of the equalizer elements of additional equalizers for multi-channel carrier frequency wide area systems, in the case of a remote control office, the individual equalizers that lead to different coaxial lines belong in one cable and are placed in different main offices, one after the other to be prompted for automatic adjustment by each individual from the remote control office Remote control pulses are sent out and received in every main office and there an n-level Activate the binary reception counter that counts after the corresponding remote control pulses have been received Makes setting transistors conductive, which cause the corresponding equalizer to adjust.

Sometimes it is necessary to set the additional equalizer independently of the remote control to be initiated by hand. If z. B. when adjusting the additional equalizer of a coaxial line an error alarm (faulty work) is signaled, you can switch to manually by switching to Another coaxial line to determine whether the automatic setting or other components of the remote control device work incorrectly and thereby localize the error more easily.

This manual start-up is implemented according to the invention in that each equalizer is in A changeover switch is assigned to the main offices, which when actuated the collector of the associated control transistor connects to the low-resistance input of an evaluation circuit, the evaluation circuit actuated and thus causes the setting of the corresponding additional equalizer, and that the quiescent sides of the changeover switches are connected in series and in the rest position connect the input of the evaluation circuit to the reference potential and thereby respond impede.

An embodiment of the invention with four setting transistors is explained with reference to the drawing. The setting transistors TsI, Ts 2, Ts 3 and Ts 4 are controlled by the receiving counter EZ. The collectors of the setting transistors are connected to the inputs of the working sides of the switches S ₁ to S ₄ . The input of the quiescent side of the first changeover switch S ₁ is connected to the reference potential - U _B. The outputs (center springs) of the changeover switch are each connected to the input of the rest side of the subsequent changeover switch. The output of the last switch S ₄ is connected to the input ^ of the evaluation circuit.

When a changeover switch is operated, it closes

Remote control device for remote control of
Additional equalizers for multi-channel carrier frequency wide area systems

Addendum to the patent: 1159 033

Applicant:
Telefunken

Patentverwertungsgesellschaft mb H.,
Ulm / Danube, Elisabethenstr. 3

Named as inventor:

Dipl.-Ing. Joel Korn, Backnang;

Erich Ellbogen, Rielingshausen (Württ.)

a circuit from + U _B via the collector resistance of the associated control transistor, the input E _{a of} the evaluation circuit and the diodes D ₁ and D ₂ to - U _B. At the diodes D ₁ and D ₃ , which are switched in the forward direction, an evaluation voltage drops, which via the voltage divider R _B , i? ₄ to the base

of the evaluation transistor Tsa arrives. A second partial voltage is fed to the base of the evaluation transistor Tsa from the operating voltage source via the resistors R ₁ and R _2. Only when both partial voltages reach the base of the transistor Tsa

35: gen, this is conductive, brings the indicator lamp L

'.- to light up, holds the reception counter EZ _{via the diode D 3} in its end position so that the reception counter cannot operate any setting transistors, and stimulates a bivibrator BM _{via its input via the diode D 4} , which in turn sets the corresponding Additional equalizer.

Another criterion that is required for setting the associated additional equalizer is that The associated control transistor becomes conductive. Through the low-resistance input of the evaluation circuit the associated control transistor is short-circuited when a changeover switch is operated. This will the associated control transistor is simulated to become conductive.

At the moment of becoming conductive, the transistor Tsa excites a monovibrator, not shown

'' ■ - '■' ■ "'■' 609509/246

(M ₂ in Fig. 5 of the patent specification of the main patent), which sends a feedback pulse to the control center and this brings the actuation of the manual adjustment to the knowledge. At the end of the setting of the additional equalizer, another monovibrator, not shown (M ₁ in F i g. 5 of the patent specification of the main patent) is excited by the automatic setting, which causes a feedback to the control center and via the input E ₂ and the diode D ₅ for short-circuits the second partial voltage of the evaluation transistor Tsa for a short time and causes the lamp L to go out. This visually indicates the end of the equalizer setting. The series connection of the idle sides of the changeover switches S ₁ to S ₄ ensures that two additional equalizers cannot be set at the same time by operating two changeover switches. Because only the actuated changeover switch arranged closest to the input E _{a of} the evaluation circuit can short-circuit the associated control transistor and simulate its becoming conductive.

Claims (6)

Patent claims: 1. Remote control device for triggering the automatic setting and regulation of the equalization elements of additional equalizers for multi-channel carrier frequency wide area systems, in the case of a remote control office from the individual equalizers, which lead to different coaxial lines in one Cables belong and are attached in different main offices, one after the other to the automatic Adjustment can be initiated by individual remote control pulses from the remote control office sent out and received in every main office and there an n-level Activate the binary reception counter that counts after the corresponding remote control pulses have been received Makes setting transistors conductive, which cause the corresponding equalizer to adjust, according to patent 1159033, characterized in that for setting the additional equalizer manually each equalizer in the main offices independently of the remote control Changeover switch is assigned, which when actuated the collector of the associated control transistor with the low-resistance input of an evaluation circuit connects, actuates the evaluation circuit and thus the setting of the corresponding Additional equalizer causes, and that the quiescent sides of the switch are connected in series and in the rest position connect the input of the evaluation circuit to the reference potential and thereby prevent them from being addressed. 2. Remote control device according to claim 1, characterized in that the low-impedance input of the evaluation circuit is formed by the series connection of two diodes (D ₁ and D ₂ ) in the forward direction, at which an evaluation voltage when a changeover switch (S ₁ ... S _{4) is actuated} falls off. 3. Remote control device according to claim 1 and 2, characterized in that a transistor (Tsa) is used as the evaluation circuit, the base of which via a voltage divider (R ₁ + R ₂ , RJ a partial voltage from the operating voltage source ( Ug) and a second voltage divider ( R ₃ , 2? ₄ ) a second partial voltage from the evaluation voltage is supplied. 4. Remote control device according to claim 1, 2 and 3, characterized in that the evaluation transistor (Tsa) when the changeover switch (S ₁ ... S ₄ ) is operated, an indicator lamp (L) lights up, via a diode (D ₃ ) holds the receiving counter (EZ) in its end position so that the receiving _{counter cannot operate any setting transistors, and via a diode (D 4} ) it stimulates a bivibrator (BM) which causes the corresponding additional equalizer to be set. 5. Remote control device according to claim 1, 2 and 3, characterized in that the evaluation transistor (Tsa) when conducting a monovibrator (M ₂ in F i g. 5 of the patent specification of the main patent) excites which sends a feedback pulse to the control center and this activates the manual adjustment brings to the knowledge. 6. Remote control device according to claim 1, 2 and 3, characterized in that at the end of the additional equalizer setting a further monovibrator (M ₁ in F i g. 5 of the patent specification of the main patent), which is stimulated by the automatic setting and causes a feedback to the control center, The partial base voltage of the evaluation transistor (Tsa) originating from the operating voltage source short-circuits via a diode (D ₅ ) and causes the lamp (L) to go out. 1 sheet of drawings 609 509/246 2.66 © Bundesdruckerei Berlin