SU528706A1 - The method of checking subscriber lines for short circuit between the wires of the line - Google Patents
The method of checking subscriber lines for short circuit between the wires of the lineInfo
- Publication number
- SU528706A1 SU528706A1 SU1818826A SU1818826A SU528706A1 SU 528706 A1 SU528706 A1 SU 528706A1 SU 1818826 A SU1818826 A SU 1818826A SU 1818826 A SU1818826 A SU 1818826A SU 528706 A1 SU528706 A1 SU 528706A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- line
- wires
- short circuit
- subscriber lines
- pulses
- Prior art date
Links
Landscapes
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Description
можно наблюдать при помощи индикатора 4, например осциллографа. Дл этого импульсы направл ют на вход селектора 5 пол рности, который выдел ет выбросы обратной пол рности . Дл уменьшени действи возможных помех и предотвращени ложного срабатывани индикатора 4 выход селектора 5 пол рности соединен со входом ограничител 6, на входе которого по вл ютс только те импульсы , амплитуда которых выще заранее установленного фиксированного уровн .can be observed using indicator 4, such as an oscilloscope. For this, the pulses are directed to the input of the polarity selector 5, which selects outliers of reverse polarity. To reduce the effect of possible interference and prevent the indicator 4 from firing, the output of the polarity selector 5 is connected to the input of the limiter 6, at the input of which only those pulses appear whose amplitude is higher than a predetermined fixed level.
С выхода ограничител 6 импульсы поступают на вход формировател 7, который из последовательности имп льсов различных амплитуд и длительностей формирует последовательность импульсов с посто нными параметрами дл удобства их дальнейшего преобразовани . Затем последовательность импульсов поступает на интегратор 8, срабатывающий при поступлении определенного количества импульсов. На выходе интегратора включен индикатор 4. Если в абонентской линии имеетс короткое замыкание между ее проводами , то нагрузкой генератора 2 пр моугольных импульсов вл етс только короткозамкнута From the output of limiter 6, the pulses arrive at the input of the imaging unit 7, which from a sequence of impulses of various amplitudes and durations forms a sequence of pulses with constant parameters for the convenience of their further conversion. Then the sequence of pulses goes to the integrator 8, which is triggered when a certain number of pulses arrive. Indicator 4 is turned on at the output of the integrator. If there is a short circuit between its wires in the subscriber line, the load of the generator 2 rectangular pulses is only short-circuited.
лини 1. В этом случае форма импульсов генератора 2 также искажаетс (фиг. 1 в) вследствие зар да и разр да емкости 9 между проводами линии, однако выбросов у фронтов имнульсов при этом нет, сигнала на выходе устройства 5-8 не будет, и индикатор 4 показывает наличие в линии короткого замыкани . Предложенный способ можно использовать и дл проверки других типов абонентских установок (телеграфный аппарат, передача данных и т. д.), если только их полное входное сопротивление носит индуктивный характер.Line 1. In this case, the shape of the generator 2 pulses is also distorted (Fig. 1c) due to the charge and discharge of the capacitance 9 between the line wires, but there are no emissions at the fronts of the pulses, there will be no signal at the output of the device 5-8, and LED 4 indicates the presence of a short circuit in the line. The proposed method can be used to test other types of subscriber units (telegraph, data transmission, etc.), if only their total input resistance is inductive.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU1818826A SU528706A1 (en) | 1972-07-19 | 1972-07-19 | The method of checking subscriber lines for short circuit between the wires of the line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU1818826A SU528706A1 (en) | 1972-07-19 | 1972-07-19 | The method of checking subscriber lines for short circuit between the wires of the line |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU528706A1 true SU528706A1 (en) | 1976-09-15 |
Family
ID=20524356
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU1818826A SU528706A1 (en) | 1972-07-19 | 1972-07-19 | The method of checking subscriber lines for short circuit between the wires of the line |
Country Status (1)
| Country | Link |
|---|---|
| SU (1) | SU528706A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0808042A2 (en) * | 1996-05-13 | 1997-11-19 | Siemens Aktiengesellschaft | Automatic adaptation of a cryptographic device to a telephone |
-
1972
- 1972-07-19 SU SU1818826A patent/SU528706A1/en active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0808042A2 (en) * | 1996-05-13 | 1997-11-19 | Siemens Aktiengesellschaft | Automatic adaptation of a cryptographic device to a telephone |
| EP0808042A3 (en) * | 1996-05-13 | 2004-10-06 | Rohde & Schwarz SIT GmbH | Automatic adaptation of a cryptographic device to a telephone |
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