KR200388905Y1 - In-Line Equalizer - Google Patents
In-Line Equalizer Download PDFInfo
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- KR200388905Y1 KR200388905Y1 KR20-2005-0008393U KR20050008393U KR200388905Y1 KR 200388905 Y1 KR200388905 Y1 KR 200388905Y1 KR 20050008393 U KR20050008393 U KR 20050008393U KR 200388905 Y1 KR200388905 Y1 KR 200388905Y1
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- line
- band
- equalizer
- circuit
- line equalizer
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/02—Details
- H04B3/04—Control of transmission; Equalising
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Abstract
본 고안은 '전기통신기술' 분야로서 동축케이블 전송선로설비 기술분야에 해당하고, 이용자에게 아날로그 및 디지털 텔레비전 신호와 인터넷 등의 멀티미디어정보 교환 수단을 제공하기 위하여, 이용자 단자에서의 적절한 신호레벨 운용이 용이하게 하는 것을 목적으로 한다.The present invention corresponds to the field of coaxial cable transmission line equipment as 'telecommunications technology', and to provide users with a means of exchanging multimedia information such as analog and digital television signals and the Internet, proper signal level operation at the user terminal is required. It aims at making it easy.
본 고안의 선로등화기는 종래의 선로등화기가 하향대역과 상향대역으로 분리 및 결합하는 대역분리 형식인데 반하여, 하향대역과 상향대역을 분리하지 아니하고 전송선로 시스템 전송대역의 최저주파수에서부터 최고주파수까지에 대한 연속경사로 구성하는 것을 특징으로 한다.The line equalizer of the present invention is a band separation type in which the conventional line equalizer separates and combines the down band and the up band, whereas the down band and the up band are separated from the lowest frequency to the highest frequency of the transmission line system transmission band. Characterized in that consisting of a continuous slope for.
본 고안의 선로등화기는 양방향 대역분리여파회로에 의한 대역분리 없이 동축케이블 선로의 손실경사를 등화 함으로서, 입력 및 출력에서의 대역분리에 의한 삽입손실 및 차단주파수 부근대역에서의 군 지연(Group delay) 요인이 제거되고, 향후의 상ㆍ하향 분리대역 변경 시에 기기 자체를 교체할 필요가 없어지며, 설계 및 설치 시에 상ㆍ하향 신호레벨이 동시에 조정되는 효과가 있다.The line equalizer of the present invention equalizes the loss slope of the coaxial cable line without band separation by the bidirectional band separation filter circuit, thereby reducing the insertion loss and the group delay in the band near the cutoff frequency by band separation at the input and output. This eliminates the need to replace the device itself in the future when the up / down separation band is changed, and the up and down signal levels are simultaneously adjusted during design and installation.
Description
본 고안은 '전기통신기술'분야에 속하며 '전송설비' 및 '정보통신설비'부문으로서 유선방송 및 고주파광대역전송망의 광ㆍ동축 복합(HFC)전송선로 중 동축케이블 전송선로설비 기자재 기술 분야에 해당한다.The present invention belongs to the field of 'telecommunications technology' and 'transmission equipment' and 'information and communication equipment', which correspond to the equipment and equipment technology field of coaxial cable transmission line equipment among optical and coaxial hybrid (HFC) transmission lines of cable broadcasting and high frequency broadband transmission network. do.
종래에 사용되어지고 있는 동축케이블 전송선로용 선로등화기(도2)는 그 입력 및 출력부에 양방향대역분리여파회로(01,02)가 각각 배치되고 양측의 고역통과여파회로 간에 하향대역등화블록(22)이 위치하여 하향부분으로 구성되고, 플러그-인형 상향감쇄모듈(32)을 사용자가 선택삽입 할 수 있도록 한 형식의 상향부분으로 구성되어 있다.The line equalizer (FIG. 2) for the coaxial cable transmission line used in the related art has a bidirectional band separation filter circuit (01, 02) disposed at its input and output portions, respectively, and a down band equalization block between the high pass filter circuits at both sides. (22) is located in the downward portion, and the plug-in upward attenuation module (32) is composed of the upper portion of the type so that the user can selectively insert.
이러한 종래의 선로등화기(도2)는 선로등화회로 외에 양측 양방향대역분리여파기(01,02)에 의한 삽입손실로 인하여 선로등화기 전체 삽입손실이 증가됨으로서 후단의 탭-오프 설치 가용수를 더 감소시키며, 고역 및 저역통과여파회로의 차단주파수 부근대역에서 군 지연(Group delay) 요인이 부가되어 전송특성에도 악영향을 미친다.This conventional line equalizer (FIG. 2) increases the total insertion loss of the line equalizer due to the insertion loss by the two-way bidirectional band splitting filters (01,02) in addition to the line equalizing circuit, thereby increasing the number of available tap-off installations at the rear end. In addition, the group delay factor is added in the band near the cutoff frequency of the high and low pass filter circuit, which adversely affects the transmission characteristics.
또한, 향후의 전송선로 시스템 상ㆍ하향 분리대역 변경 시에 기기 자체를 교체하여야 하는 비현실적 요소가 내재되어 있음과 아울러, 기기 자체의 구성이 주된 등화회로에 비하여 부대적인 대역분리회로의 비중이 더 크므로 그 회로가 복잡하고 큰 용적이 필요하며, 제조비용에 있어서도 경제성이 합리적이지 못하다는 단점이 있다.In addition, there is an inherent unrealistic factor that the device itself must be replaced when the uplink / downlink separation band of the transmission line system is changed in the future, and the composition of the device itself is larger than that of the main equalization circuit. There is a disadvantage that the log circuit is complicated and requires a large volume, and the economic efficiency is not reasonable even in the manufacturing cost.
본 고안은 선로등화기의 전기적 특성에 있어서 입ㆍ출력 포트간의 신호의 삽입손실 감소 및 군 지연(Group delay) 요인을 제거하고자 하며, 기구적인 면에 있어서는 회로를 간략화 하여 소형으로도 제작이 가능토록 하는데 그 목적이 있다.The present invention aims to reduce the insertion loss of the signal between the input and output ports and the group delay factor in the electrical characteristics of the line equalizer. In terms of the mechanical aspect, the circuit can be simplified and manufactured in a small size. Its purpose is to.
본 고안의 선로등화기는 도1에 있어서, 급전전류가 중첩된 하향대역 고주파신호가 입력포트(00)로 입력되어 급전전류차단회로(12)에서 급전전류는 차단되고 고주파신호만 통과하여 전송선로 시스템에서 사용하는 최저주파수와 최고주파수간의 전대역에 걸친 선로경사등화를 하는 전대역선로경사등화블록(20)으로 입력된 후, 하향대역 부분의 손실경사특성에 의하여 그 경사가 조정되어 급전전류차단회로(13)를 경유하여 출력포트(10)로 출력되고, 상향대역 고주파신호는 출력포트(10)로 입력되어 급전전류차단회로(13)에서 급전전류는 차단되고 고주파신호만 통과하여 전대역선로경사등화블록(20)으로 입력된 후, 상향대역 부분 손실경사특성에 의하여 그 레벨이 조정되어 급전전류차단회로(10)를 경유하여 입력포트(00)로 출력된다.The line equalizer of the present invention is shown in Figure 1, the down-band high-frequency signal superimposed the feed current is input to the input port (00), the feed current is cut off in the feed current blocking circuit 12 and only the high frequency signal passes through the transmission line After inputting to the all-line line slope equalization block 20 which performs line slope equalization over the entire band between the lowest frequency and the highest frequency used in the system, the slope is adjusted by the loss slope characteristic of the down-band portion and the feed current blocking circuit ( 13 is output to the output port 10, the uplink high-frequency signal is input to the output port 10, the feed current is cut off in the feed current blocking circuit 13 and only the high-frequency signal passes through the full-band line equalization block After input to (20), the level is adjusted by the up-band partial loss slope characteristic is output to the input port (00) via the feed current blocking circuit (10).
본 고안의 선로등화기는 종래의 선로등화기(도2) 구성요소인 입ㆍ출력부 양방향대역분리여파회로부(도2의20)의 저역통과여파회로(도2의31,33)간의 상향감쇄회로(도2의32)를 경유하지 않으므로 분리대역 차단주파수 부근의 군 지연(Group delay)특성 악화요인이 제거되고 삽입손실이 감소되며, 이에 따라 회로가 간단해 진다.The line equalizer of the present invention is attenuated upwardly between the low pass filter circuits (31 and 33 in Fig. 2) of the input / output part bidirectional band separation filter circuit part (20 in Fig. 2), which is a component of the conventional line equalizer (Fig. 2). Since it does not go through the circuit (32 in Fig. 2), the deterioration factor of the group delay characteristic near the separation band cutoff frequency is eliminated and the insertion loss is reduced, thereby simplifying the circuit.
또한, 전송선로 탭-오프의 탭-단자 이하 단에 사용할 목적의 선로등화기는 도1의 선로등화기 구성도 중 급전전류통과회로(11)를 두지 않고 구성하며 보다 더 소형으로 제작된다In addition, the line equalizer intended for use in the stage below the tap terminal of the transmission line tap-off is configured without the feed current passing circuit 11 in the line equalizer configuration of FIG.
본 고안의 선로등화기를 동축케이블 전송선로의 분배선로에 사용할 경우에 종래보다 작은 삽입손실의 효과로 탭-오프 설치 가능 수가 증가되어 전송선로 구축비용이 절감되는 효과가 있으며, 대역분리를 하지 않는 특징의 효과로 군 지연(Group delay)특성 악화요인이 제거되어 양호한 전송품질의 유지가 용이해 지고, 회로가 간단해지므로 소형화가 용이하여 탭-오프의 탭-단자 이하에 적용하기도 용이하여 지는 효과가 있다.When the line equalizer of the present invention is used for distribution lines of coaxial cable transmission lines, the number of tap-off installations can be increased due to the effect of the insertion loss smaller than that of the prior art, thereby reducing the construction cost of transmission lines, and eliminating band separation. The effect of this feature is that the deterioration of group delay characteristics is eliminated, so that it is easy to maintain good transmission quality, and the circuit is simplified, so that it is easy to miniaturize and can be easily applied to the tab-terminal of the tap-off. There is.
또한, 향후의 전송선로 시스템 상ㆍ하향 분리대역 변경 시에 기기 자체를 교체할 필요가 없어지는 효과가 있다.In addition, there is an effect that there is no need to replace the device itself in the future when the transmission line system upstream and downstream separation band changes.
도 1은 고안의 선로등화기 회로 구성도1 is a schematic diagram of a circuit equalizer circuit of the present invention.
도 2는 종래의 선로등화기 회로 구성도2 is a block diagram of a conventional line equalizer circuit
<도면의 주요부분에 대한 부호의 명칭><Name of code for main part of drawing>
00 : 입력포트00: input port
01,02 : 양방향대역분리여파회로부01,02: Bidirectional band separation filter circuit
10 : 출력포트10: output port
11 : 급전전류통과회로11: power supply current passing circuit
12,13 : 급전전류차단회로12,13: Feeding current blocking circuit
20 : 전대역선로경사등화블록20: All-band line slope equalization block
21,23 : 고역통과회로21,23: high pass circuit
22 : 하향대역선로경사등화블록22: Downlink band slope equalization block
31,33 : 저역통과회로31,33: Low pass circuit
32 : 상향대역감쇄회로32: up band attenuation circuit
Claims (6)
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KR20-2005-0008393U KR200388905Y1 (en) | 2005-03-28 | 2005-03-28 | In-Line Equalizer |
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KR20-2005-0008393U KR200388905Y1 (en) | 2005-03-28 | 2005-03-28 | In-Line Equalizer |
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KR200388905Y1 true KR200388905Y1 (en) | 2005-07-07 |
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- 2005-03-28 KR KR20-2005-0008393U patent/KR200388905Y1/en not_active IP Right Cessation
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