JPS6329335Y2 - - Google Patents
Info
- Publication number
- JPS6329335Y2 JPS6329335Y2 JP1982040765U JP4076582U JPS6329335Y2 JP S6329335 Y2 JPS6329335 Y2 JP S6329335Y2 JP 1982040765 U JP1982040765 U JP 1982040765U JP 4076582 U JP4076582 U JP 4076582U JP S6329335 Y2 JPS6329335 Y2 JP S6329335Y2
- Authority
- JP
- Japan
- Prior art keywords
- unbalanced
- circuit
- terminal
- signal
- balanced
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 238000006243 chemical reaction Methods 0.000 claims description 12
- 239000003990 capacitor Substances 0.000 claims description 9
- 238000010586 diagram Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
Landscapes
- Details Of Television Systems (AREA)
Description
【考案の詳細な説明】
この考案はテレビの共同受信機器、たとえば分
配器、分波器、あるいは増巾器などにおける給電
線の接続部に関し、さらに詳しくは、不平衡形の
給電線も平衡形の給電線も選択的に接続できるよ
うにした共同受信機器における給電線接続部に関
するものである。[Detailed description of the invention] This invention relates to the connection of the feeder line in television communal reception equipment, such as a distributor, branching filter, or amplifier. The present invention relates to a feeder line connection section in a communal receiving device that can also selectively connect the feeder lines of the present invention.
従来の共同受信機器における給電線接続部にあ
つて整合器が予め備えられており、不平衡形給電
線を接続する場合にはその整合器を切り離して利
用するようにしたものは、それを素人が用いた場
合にその切り離しを忘れて高周波特性を悪くそて
しまつたりする問題点があつた。また上記のよう
な構成のものは整合器が比較的高価であるために
消費者に対する提供価格が高くなつてしまう問題
点もあつた。 Conventional communal receiving equipment is equipped with a matching box at the feed line connection section, and when connecting an unbalanced feed line, the matching box is disconnected and used. When used, there was a problem that the high frequency characteristics could be deteriorated due to forgetting to disconnect it. In addition, in the case of the above-mentioned configuration, the matching device is relatively expensive, so there is a problem that the price offered to consumers becomes high.
そこで本考案は、上述の問題点を除くようにし
たもので、不平衡形、平衡形いずれの給電線も選
択的に接続でき、しかもその場合に切り離しなど
の手数を要せず、さらにまた安価な提供が可能と
なるようにした共同受信機器における給電線接続
部を提供しようとするものである。 Therefore, the present invention has been developed to eliminate the above-mentioned problems, and allows for selective connection of either unbalanced or balanced feeder lines, without the need for disconnecting, and at low cost. The present invention aims to provide a power supply line connection section in a communal receiving device that enables the provision of the following information.
以下本願の実施例を示す図面について説明す
る。第1図は共同受信機器の一例として分波器を
示すものである。この図において、1は入力端子
で、アンテナあるいは共同受信線路からのUHF
とVHFのテレビ信号が入力される端子であり、
不平衡形給電線接続用の一対の不平衡端子2と、
平衡形給電線接続用の一対の平衡端子3とから構
成されている。不平衡端子2は後述の信号回路に
連なる信号端子4とアース回路に連なるアース端
子5とから構成されている。また平衡端子3は、
二つ一対の信号端子4,6により構成されてい
る。なお信号端子4は、前記不平衡端子2におけ
るものを共用しているがこれらは別個に設けても
よい。7は出力端子を示し、UHFのテレビ信号
を出力するようにしたUHF出力端子8とVHFの
テレビ信号を出力するようにしたVHF出力端子
9とから構成されている。出力端子8は平衡形給
電線が接続できるように、また出力端子9は不平
衡形給電線が接続できるようにそれぞれ周知のご
とく構成してある。 The drawings showing the embodiments of the present application will be described below. FIG. 1 shows a duplexer as an example of communal reception equipment. In this figure, 1 is the input terminal, which is the UHF input terminal from the antenna or common reception line.
This is the terminal where the VHF TV signal is input.
a pair of unbalanced terminals 2 for connecting an unbalanced feeder line;
It is comprised of a pair of balanced terminals 3 for connecting a balanced type feeder line. The unbalanced terminal 2 is composed of a signal terminal 4 connected to a signal circuit, which will be described later, and a ground terminal 5 connected to a ground circuit. In addition, the balanced terminal 3 is
It is composed of a pair of signal terminals 4 and 6. Note that although the signal terminal 4 is shared by the unbalanced terminal 2, these may be provided separately. Reference numeral 7 indicates an output terminal, which is composed of a UHF output terminal 8 for outputting a UHF television signal and a VHF output terminal 9 for outputting a VHF television signal. The output terminal 8 is constructed in a well-known manner so that a balanced power supply line can be connected thereto, and the output terminal 9 is constructed so that an unbalanced power supply line can be connected thereto.
次に共同受信回路について説明する。10は周
知の分波回路を示し、高域通過フイルタ11と低
域通過フイルタ12とから構成してある。高域通
過フイルタ11は、テレビの放送信号のうち
UHF(470〜770MHz)の信号を通過させVHF(76
〜220MHz)の信号を阻止するよう、周知の如く
コンデンサC1,C1、コイルL1とで構成してある。
また低域通過フイルタ12は、上記テレビ放送信
号のうちVHFの信号を通過させUHFの信号を阻
止するように、コイルL3,L3′およびコンデンサ
C3を用いて構成してある。13はインピーダン
ス変換器で、高域通過フイルタ11の不平衡(た
とえば75Ω)の出力を平衡(200あるいは300Ω)
に変換するためのものであり、コイルL2とコン
デンサC2とから構成してある。尚上記共同受信
回路は図から明らかな如く不平衡形で、21は不
平衡形の信号回路、22はアース回路を夫々示
す。次に14は一端を信号端子6に接続し他端を
アース回路22に接続した変換要素で、抵抗Rと
コンデンサC4により構成してある。抵抗Rはた
とえば47Ω、1/6Wのカーボン皮膜抵抗器が用
いられる。またコンデンサC4としては、たとえ
ば7pFのものが用いられる。これらの素子のうち
抵抗Rは主にVHF帯域のテレビ信号に対するイ
ンピーダンス変換要素として作用し、コンデンサ
C4は主にUHF帯域のテレビ信号に対するインピ
ーダンス変換要素として作用する。 Next, the joint reception circuit will be explained. Reference numeral 10 indicates a well-known branching circuit, which is composed of a high-pass filter 11 and a low-pass filter 12. The high-pass filter 11 filters out the TV broadcast signal.
Passes UHF (470~770MHz) signals and
As is well known, it is composed of capacitors C 1 and C 1 and a coil L 1 so as to block signals of up to 220 MHz.
Furthermore, the low-pass filter 12 includes coils L 3 , L 3 ' and a capacitor so as to pass the VHF signal among the television broadcast signals and block the UHF signal.
It is constructed using C3 . 13 is an impedance converter that balances the unbalanced (75Ω, for example) output of the high-pass filter 11 (200 or 300Ω).
It consists of a coil L2 and a capacitor C2 . As is clear from the figure, the above-mentioned communal reception circuit is of an unbalanced type, and numeral 21 represents an unbalanced signal circuit, and 22 represents a grounding circuit. Next, 14 is a conversion element having one end connected to the signal terminal 6 and the other end connected to the ground circuit 22, which is constituted by a resistor R and a capacitor C4 . For example, a 47Ω, 1/6W carbon film resistor is used as the resistance R. Further, as the capacitor C4 , for example, a capacitor of 7 pF is used. Of these elements, the resistor R mainly acts as an impedance conversion element for TV signals in the VHF band, and the capacitor
C4 primarily acts as an impedance conversion element for television signals in the UHF band.
上記構成のものにあつては、アンテナからのテ
レビ信号が不平衡形給電線(同軸ケーブル)を用
いて送られてきている場合には、その給電線を接
続端子2に周知のごとく、即ち芯線を信号端子4
に外部導体を接地端子5に夫々接続する。すると
その給電線はマツチングよく分波回路10に接続
され、給電線から送られてくるテレビ信号のうち
UHFのテレビ信号は周知のごとく広域通過フイ
ルタ11、インピーダンス変換器13を通つて出
力端子8から出力される。またVHFのテレビ信
号は低域通過フイルタ12を介して出力端子9か
ら出力される。 In the case of the above configuration, when the television signal from the antenna is sent using an unbalanced feed line (coaxial cable), the feed line is connected to the connection terminal 2 as is well known, that is, the core wire The signal terminal 4
The external conductors are connected to the ground terminal 5, respectively. Then, the feeder line is connected to the branching circuit 10 with good matching, and the TV signal sent from the feeder line is
As is well known, the UHF television signal is output from the output terminal 8 through a wide-pass filter 11 and an impedance converter 13. Further, the VHF television signal is outputted from the output terminal 9 via the low-pass filter 12.
一方アンテナからのテレビ信号が平衡形給電線
(たとえばリボン形フイーダ、メガネ形フイーダ)
を用いて送られてきている場合は、その給電線を
接続端子3に周知のごとく接続する。するとその
給電線は変換要素14を介してマツチング良く分
波回路10に接続され、給電線から入来するテレ
ビ信号は前述の場合と同様に分波されて、UHF
テレビ信号が出力端子8からVHFテレビ信号が
出力端子9からそれぞれ出力される。 On the other hand, the TV signal from the antenna is connected to a balanced feeder (e.g. ribbon feeder, spectacle feeder).
If the power is being sent using a power supply line, connect the power supply line to the connection terminal 3 in a well-known manner. Then, the feeder line is connected to the demultiplexing circuit 10 through the conversion element 14 with good matching, and the TV signal coming from the feeder line is demultiplexed in the same way as in the above case, and is converted to UHF.
A television signal is output from an output terminal 8, and a VHF television signal is output from an output terminal 9, respectively.
次に第2図は前記構成のものの特性を測定した
結果を示すものである。なおこの図において(イ)お
よび(ロ)はそれぞれ不平衡端子2から信号を入力し
て出力端子9および出力端子8に現われた信号の
レベルを測定した結果を示すものである。また(ハ)
および(ニ)はそれぞれ平衡端子3から信号を入力し
て出力端子9および出力端子8にそれぞれ現われ
た信号のレベルを測定した結果を示すものであ
る。なおこの第2図における測定系統図におい
て、21,22はそれぞれ不平衡出力および平衡
出力のテレビ信号発生器、23,24は平衡入力
および不平衡入力の指示計をそれぞれ示す。 Next, FIG. 2 shows the results of measuring the characteristics of the structure described above. In this figure, (a) and (b) show the results of measuring the levels of the signals appearing at the output terminals 9 and 8 by inputting a signal from the unbalanced terminal 2, respectively. Again (ha)
and (D) show the results of measuring the levels of the signals appearing at the output terminals 9 and 8, respectively, by inputting signals from the balanced terminal 3. In the measurement system diagram in FIG. 2, reference numerals 21 and 22 indicate television signal generators with unbalanced output and balanced output, respectively, and indicators 23 and 24 indicate balanced input and unbalanced input, respectively.
以上のようにこの考案にあつては、共同受信回
路に直接に接続した不平衡端子2と上記回路に変
換要素14を介して接続した平衡端子とを備える
から、給電線を接続する場合、それが平衡形であ
つても不平衡形であつても、上記端子を選択利用
してマツチングの良い接続ができる効果がある。 As described above, this invention includes the unbalanced terminal 2 directly connected to the community reception circuit and the balanced terminal connected to the circuit via the conversion element 14, so that when connecting the feeder line, Regardless of whether the terminal is a balanced type or an unbalanced type, the above-mentioned terminals can be selectively used to make connections with good matching.
しかも上記のように選択利用するようにしたも
のであつても、上記変換要素14は元々不平衡端
子2から切り離されているから、上記不平衡形給
電線を接続してテレビ信号の伝達をする場合に
は、通常の如く接続を行なうのみで上記の如きマ
ツチングの良い接続ができ、素人が接続を行なつ
た場合でも良特性でのテレビ信号の伝達を可能に
できる有用性がある。 Moreover, even if the conversion element 14 is selectively used as described above, since the conversion element 14 is originally separated from the unbalanced terminal 2, the unbalanced feed line is connected to transmit the television signal. In some cases, it is possible to make a well-matched connection as described above just by making the connection in the usual way, and it is useful because even if an amateur makes the connection, it is possible to transmit a television signal with good characteristics.
更に本考案は上記の如く変換要素14を備える
ものであつても、その構成は抵抗Rとコンデンサ
C4という一般的に安価な素子を用いた構成であ
るから、安価な提供を可能にできる経済効果もあ
る。 Furthermore, even though the present invention is equipped with the conversion element 14 as described above, its configuration consists of a resistor R and a capacitor.
Since the structure uses a generally inexpensive element called C4 , there is an economical effect that it can be provided at a low price.
図面は本願の実施例を示すもので、第1図は分
波器の回路図、第2図は特性を示すグラフ。
2……不平衡形給電線接続部、3……平衡形給
電線接続部、10……分波回路。
The drawings show an embodiment of the present application, and FIG. 1 is a circuit diagram of a duplexer, and FIG. 2 is a graph showing characteristics. 2... Unbalanced feed line connection section, 3... Balanced feed line connection section, 10... Branching circuit.
Claims (1)
同受信回路には、不平衡形給電線接続用の一対の
不平衡端子と、平衡形給電線接続用の一対の平衡
端子とを付設している共同受信機器における給電
線接続部において、上記不平衡形端子における一
方の端子は上記信号回路に接続すると共に他方の
端子は上記アース回路に接続し、上記一対の平衡
端子における一方の端子は上記信号回路に接続す
ると共に他方の端子は変換要素を介してアース回
路に接続し、しかも上記変換要素はテレビ信号の
VHF帯の信号に対して変換作用を行なうように
した抵抗と、テレビ信号のUHF帯の信号に対し
て変換作用を行なうようにしたコンデンサとを並
列接続して構成したことを特徴とする共同受信機
器における給電線接続部。 A communal reception circuit including an unbalanced signal circuit and a ground circuit is provided with a pair of unbalanced terminals for connecting an unbalanced feeder line and a pair of balanced terminals for connecting a balanced feeder line. In the feed line connection section of the communal receiving equipment, one of the unbalanced terminals is connected to the signal circuit, the other terminal is connected to the ground circuit, and one of the pair of balanced terminals is connected to the signal circuit. circuit, and the other terminal is connected to the ground circuit via a conversion element, and the conversion element is connected to a TV signal.
Community reception characterized by being configured by connecting in parallel a resistor configured to perform a conversion action on VHF band signals and a capacitor configured to perform a conversion action on UHF band signals of television signals. Feed line connection in equipment.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1982040765U JPS58144957U (en) | 1982-03-23 | 1982-03-23 | Feed line connection in communal receiving equipment |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1982040765U JPS58144957U (en) | 1982-03-23 | 1982-03-23 | Feed line connection in communal receiving equipment |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS58144957U JPS58144957U (en) | 1983-09-29 |
JPS6329335Y2 true JPS6329335Y2 (en) | 1988-08-08 |
Family
ID=30051969
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1982040765U Granted JPS58144957U (en) | 1982-03-23 | 1982-03-23 | Feed line connection in communal receiving equipment |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS58144957U (en) |
-
1982
- 1982-03-23 JP JP1982040765U patent/JPS58144957U/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS58144957U (en) | 1983-09-29 |
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