JPH08154241A - Repeater for catv - Google Patents

Abstract

PURPOSE: To easily reverse the relation between the front side of a case and input terminal and an output terminal by providing symmetrically various terminals of a main case or the like and mother boards with respect to the center line. CONSTITUTION: Various terminals of 1st and 2nd sub-cases 11, 12, a case 13 and a branch case 30 being components of a main case 10 are arranged symmetrically with respect to the center line. Furthermore, terminals of the mother boards 41-43 connecting to the various terminals are arranged symmetrically with respect to the center line. Moreover, optical fiber holding terminals L1, L2 are provided to both sides of a case 50 and the relation of the front side of the case and the input terminal and the output terminals is easily reversed by turning the cases 10, 30 and using corresponding terminals L1, L2 to realize the repeater for a CATV where installation and adjustment job performance is enhanced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a repeater capable of repeating an optical signal in a CATV system, and more particularly to a repeater capable of easily inverting the relationship between the front surface of a housing and signal input terminals and output terminals.

[0002]

2. Description of the Related Art Conventionally, a repeater for receiving an optical signal of a CATV system and outputting it as an electric signal has a lid on the front side, and it is a normal posture to open the lid downward. In this normal position, the left side of the housing is an input of an optical signal, and the right side terminal is an output terminal of a high frequency signal. As described above, the relationship between the normal attitude of the repeater and the input and output directions of the signal is uniquely determined, and the relationship cannot be changed.

[0003]

Therefore, when the repeater is laid, the direction in which the downlink signal is transmitted is uniquely determined. Therefore, the front end of the repeater is naturally located at the left end of the input terminal. , The right end is determined to be the output terminal. As a result, depending on the direction of the front, a large working space cannot be taken, and it is difficult to install and adjust the unit inside the housing, resulting in poor workability. Further, if the front of the repeater is determined so as to facilitate the work, it is necessary to connect the left optical cable to the right terminal and the right coaxial cable to the left terminal.

In addition, in a tree-shaped CATV system that has been once laid, it may be necessary to permanently make the transmission direction of the trunk line in a certain section reverse because of the improvement of facilities. In this case, it is necessary to reverse the amplification direction of the relay amplifier in the relevant section. In this case, it is necessary to invert the front of the relay amplifier housing itself,
It requires a lot of work. Further, when the signal transmission system is bypassed, the optical signal may be directly transmitted from the transmitting end station through the optical cable to bypass the signal. At this time, it would be very convenient if the electrical signal repeater could be shared as an optical signal repeater.

The present invention has been made to solve the above problems, and an object thereof is to make it possible to easily reverse the relationship between the front surface of the housing and the signal input and output terminals. Is.

[0006]

[Means for Solving the Problems] Claims 1 and 4 are intended for a unidirectional, bidirectional, branching or non-branching repeater,
Of these, attention is paid to a unit related to a downlink signal of a trunk line, claims 2 and 3 relate to a bidirectional system, claims 5 and 6 relate to a system with branching, and claim 7 relates to a bidirectional system. Moreover, it relates to a system with branching. Claim 8 relates to a device having a monitor signal terminal for a main line signal, and claim 9 relates to a device having a monitor terminal for a branch signal.

According to the first aspect of the present invention, the first terminal and the second terminal for inputting and outputting the high frequency electric signal by the coaxial cable, and the first holding member and the second holding member for passing and holding the optical cable are respectively provided on the left and right sides. A box-shaped housing formed on the end surface,
A first power separation filter arranged on the first terminal side for separating electric power from the motherboard arranged on the bottom in the housing, a second power separation filter arranged on the second terminal side, frequency, etc. In a CATV repeater capable of converting an optical signal and an electric signal having a rectifier, a first power separation filter is provided on a first terminal side of a motherboard, and a second power separation is provided on a second terminal side of the motherboard. A filter is provided and an optical / electrical converter for converting an optical signal transmitted by an optical cable into an electric signal and a frequency equalizer for equalizing the converted electric signal are arranged in one metal main case. On the outer surface of the main case facing the motherboard, a pair of main case side connections for inputting and outputting electrical signals at a 180-degree rotational symmetry position with respect to the rotation axis of the main case perpendicular to the surface. Main case with terminals An optical terminal for connecting an optical cable is formed, and is engaged with a pair of main case side connection terminals at a position 180 ° rotationally symmetrical with respect to a rotation center axis on a motherboard arranged in a housing, A pair of board-side connection terminals connected to the second terminal via the second power separation filter are formed on the first terminal via the first power separation filter, respectively, and the main case is set to the normal posture and the rotation center axis. To 1
The main case side connection terminal and the board side connection terminal can be engaged with each other in two postures of the inverted posture rotated by 80 degrees, and when the main case is in the regular posture, the optical cable supplied from the first holding member is When the main case is in the inverted position, the optical cable supplied from the second holding member is connected to the optical terminal.

The features of the above construction are that the optical / electrical converter and the frequency equalizer are housed in one main case, and the relationship between the main case side connection terminals and the board side connection terminals is mainly the main case. This means that the terminals are arranged in 180-degree rotational symmetry with respect to the central axis so that both terminals are engaged even when rotated by 180 degrees with respect to the axis.

A second aspect of the present invention is characterized in that the upstream case is bidirectional and is connected to a main case side connection terminal existing on the side opposite to the optical terminal of the pair of main case side connection terminals. A demultiplexing filter for separating the optical signal and the downstream signal and an electrical / optical converter for converting the electrical signal into an optical signal and supplying the optical signal to the optical terminal are provided. The optical terminals are for the downstream optical signal and for the upstream optical signal. It is characterized in that a pair is provided.

The feature of claim 3 is that the main case is composed of three cases. That is, a first sub-case containing a receiving optical terminal for receiving an optical signal and an optical / electrical converter, and a second sub-case containing a transmitting optical terminal for transmitting an optical signal and an electric / optical converter. The main body case has a branching filter, a frequency equalizer, and a main case side connection terminal.

According to a fourth aspect of the present invention, an optical cable is connected from the left and right sides of the repeater, and at least one fiber existing in the optical cable is relayed by the repeater and transmitted as an optical signal. Has become.

According to the structure of claim 5, after converting the optical signal into the electric signal, the electric signal can be branched. It has a metal branch case with a built-in branch amplifier that amplifies the branched signal, and the housing has a branch terminal for outputting the branch signal to the outside, on the outer surface facing the motherboard of the main case. , A main case side branch connection terminal is provided at a rotation center axis position of the main case, a first board side branch connection terminal engaging with the main case side branch connection terminal is provided on the motherboard, and the branch case faces the motherboard. On the outer surface, a branch case side branch terminal for inputting a branch signal from the main case via the motherboard at the rotation center axis position of the branch case, and a branch case side branch terminal for outputting a branch signal at an arbitrary position are provided on the motherboard. The second board side branch connection terminal engaging with the branch case side branch connection terminal, the board connected to the branch case side branch terminal, and connected to the branch terminal of the housing It is by providing the branch terminal.

The feature of claim 6 is a system capable of unidirectional branching, and a common mother board for bidirectional use. That is, when reversing the input direction of the down signal, both the main case and the branch case can be reversed. For this reason, regarding the connection between the main case and the motherboard, a pair of first board side branch connection terminals are formed on the motherboard at positions 180 degrees rotationally symmetric with respect to the rotation center axis of the main case. A main case side branch connection terminal that outputs a down branch signal that can be engaged with one of the pair of first board side branch connection terminals is formed on the outer surface facing did.

Regarding the connection between the branch case and the mother board, the mother board is connected to the pair of second board side branch connection terminals and the branch terminals at rotationally symmetrical positions of 180 degrees with respect to the rotation center axis of the branch case. The board-side branch terminal is formed, and in the branch case, on the outer surface facing the mother board, there are two positions, that is, the normal position of the branch case and the inverted position rotated by 180 degrees with respect to the rotation center axis thereof. A branch case side branch connection terminal that can be engaged with one of the pair of second board side branch connection terminals and that inputs a down branch signal from the main case via the motherboard and a branch case side branch terminal that outputs a branch signal. Is provided, and the main case and the branch case can be used in two postures, that is, the normal posture and the inverted posture rotated by 180 degrees.

The structure of claim 7 relates to a bidirectional branching system. It has a metal branch case with a built-in branch amplifier for amplifying the branched signal, the case has branch terminals for outputting the branch signal, and is provided on the outer surface of the main case facing the motherboard. The case-side branch connection terminals, and the pair of case-side branch connection terminals are formed at 180-degree rotational symmetry positions with respect to the rotation center axis of the main case. On the other hand, a pair of first board-side branch connection terminals that can be engaged with the pair of case-side branch connection terminals are formed at the 180-degree rotational symmetry position regardless of the normal attitude and the inverted attitude of the main case, and branching is performed. On the outer surface of the case facing the motherboard, 18
A pair of branch case side branch connection terminals for inputting or outputting a signal to the main case and a branch case side branch terminal for inputting / outputting a branch signal are provided at a 0 ° rotational symmetry position, and the branch case rotation is provided on the motherboard. A pair of branch case side branch connection terminals are provided at a rotationally symmetrical position of 180 degrees with respect to the central axis, regardless of the two attitudes of the normal attitude of the branch case and the inverted attitude rotated by 180 degrees with respect to the central axis of rotation. A pair of second board-side branch connection terminals that engage with each other and a board-side branch terminal that is connected to the branch terminal of the housing are provided, and the main case and the branch case have a normal posture and an inverted posture rotated by 180 degrees. It is characterized in that it can be used in two positions.

According to an eighth aspect of the present invention, a monitor terminal for a main line signal is provided on the main case and the mother board with a monitor connection terminal which can be engaged to electrically connect the main case and the mother board regardless of the normal posture and the inverted posture of the main case. Claim 9 relates to a branch signal monitor terminal, and a branch monitor connection that can be engaged with the branch case and the motherboard to electrically connect the branch case and the motherboard regardless of the normal posture and the inverted posture of the branch case. The terminal is provided.

[0017]

According to the first aspect of the present invention, even if the main case is changed from the normal position to the inverted position, the main case side connecting terminal and the board side connecting terminal are arranged with respect to the central axis of the main case.
Both terminals can be connected because they are arranged in 0-degree rotational symmetry. Therefore, when the main case takes a normal posture,
The first terminal of the housing becomes free, the optical cable is held by the first holding member, the tip of the optical cable is connected to the optical terminal, and the downstream signal is supplied from the optical cable. The optical signal is converted into an electrical signal in the main case, and the electrical signal is output from the second terminal. On the contrary, when the main case takes the inverted posture, the second terminal of the housing becomes free, the second holding portion holds the optical cable, and the tip of the cable is connected to the optical terminal.
The optical signal is converted into an electric signal in the main case, and the electric signal is output to the first terminal of the housing as a down electric signal. In this way, the transmission direction of the main line signal can be changed only by reversing the posture of the main case without changing the front position of the housing.

According to the second aspect, in the repeater capable of bidirectional transmission, one of which is an optical cable and the other of which is a coaxial cable, the transmission direction of the main line signal can be changed without changing the front surface of the housing.

In claim 3, the down signal system, the up signal system, and a system in which both are mixed are provided as different cases. Therefore, by removing the upstream signal system for each case,
It can be a unidirectional system.

According to a fourth aspect of the present invention, in a system in which optical cables are arranged on both left and right sides of a housing, at least one fiber in the cable is relayed by a mechanical main repeater. Therefore, the optical signal can be relayed, the optical signal can be received and converted into an electric signal, and the electric signal can be transmitted to the trunk line and the branch line.

In claim 5, the posture is not changed for the branch case. The posture of only the main case (including the main case in which the first sub case, the second sub case, and the main body case are united) is reversed. Since the main case side branch connection terminal of the main case and the board side branch connection terminal of the motherboard are arranged on the rotation center axis, it is possible to branch the signal to the branch case even if the posture of the main case is reversed. .

In the sixth aspect, when reversing the signal transmission direction, the postures of the main case and the branch case are both reversed. Since the pair of first board-side branch connection terminals and the pair of second board-side branch connection terminals of the motherboard are arranged at 180-degree rotational symmetry positions with respect to the rotation center axes of the main case and the branch case, Terminal connection is possible for both the posture and the inverted posture.

In the present invention, when the transmission direction of the trunk signal is reversed, both the main case and the branch case are reversed. A pair of case side branch connection terminals of the main case and one of the motherboard
Since the pair of board-side branch connection terminals are arranged at 180-degree rotational symmetry positions with respect to the central axis of rotation of the main case, the posture of the main case can be reversed. Similarly, since the branch connection terminal between the branch case and the motherboard is also arranged at a rotationally symmetrical position of 180 degrees with respect to the rotation center axis of the branch case, the posture of the branch case can be reversed. Therefore, only the transmission direction of the main line signal can be reversed without changing the front position of the housing.

Claims 8 and 9 relate to the monitor terminal, and the signal can be monitored even when the main case and the branch case are inverted.

[0025]

EXAMPLES The present invention will be described below based on specific examples. This embodiment is a repeater capable of bidirectional transmission and branching. FIG. 1 is an assembly diagram showing the mechanical structure of the present repeater. 10 is a metal main case on which a circuit is mounted,
Main body case 11, first sub-case 12, second sub-case 13
It consists of and. The main body case 11 has a rectangular parallelepiped shape, and notches 111 and 112 are formed on both sides thereof. The first sub-case 12 is a case in which a circuit of a down trunk signal system is mounted and a convex portion 121 is formed below, and the convex portion 121 is fitted in the cutout portion 112 of the main body case 11. The second sub-case 13 is a case in which a circuit for an upstream trunk signal system is mounted and a convex portion 131 is formed below the main case 11.
The protrusion 131 is fitted into the notch 111. Further, the optical connector L1 is provided in the first sub case 12 and the second sub case 1 is provided.
An optical connector L2 is arranged at 3.

Reference numeral 30 is a metal branch case on which a circuit for a branch signal system is mounted. Reference numerals 41, 42 and 43 are motherboards, and 50 is a housing. The left side surface 51 of the housing 50 is provided with a first terminal 52 and branch terminals 53 and 54, and the right side surface 55 is provided with a second terminal 56 and two branch terminals 57 shown in FIG. 58 are provided.

FIG. 2 shows a circuit diagram of the repeater. A demultiplexer 113 is provided in the main body case 11, and a frequency equalizer 114 is used as a downlink main line signal system, a branching device 115 for monitoring a downlink input main line signal, and a frequency equalizer 116 is used as an upstream main line signal system. Is provided. The first sub-case 12 includes an optical / electrical converter 112 for converting an optical signal into an electric signal, and a branching device 1 for branching a down trunk signal into a branch system.
23 is provided, and in the second sub-case 13, a mixer 132 for mixing the upstream signal of the branch system with the trunk upstream system, the branchers 133 and 134 for monitoring the upstream signal, and the upstream electrical signal for the upstream optical signal. An electrical / optical signal converter 135 for converting into a signal is provided.

In the branch case 30, amplifiers 301, 302, 303 for amplifying the down-branch signal and branch trunk line signals are provided.
Distributors 304, 307, 308 for distributing, branchers 309, 310 for monitoring the downstream branch signal, demultiplexing filter 30 for separating the downstream branch signal and the upstream branch signal.
5, 306 and a mixer 311 for mixing the upstream branch signal are provided.

The mother board 41 is provided with the first power separation filter 411 and other power separation filters 412 and 413 for the branch line, and the mother board 42 is provided with the second power separation filter 421 and other branch lines. Power separation filters 422 and 423 are provided. The motherboards 41, 42, 43 are arranged insulatively on the bottom of the housing 50, as shown in FIG.

In this relay, the side surface 5 of the casing 50 is further added.
The first and second holding members 61 and 6 respectively
2 are provided. The optical cables 71 and 72 are held in the housing 50 by the first holding member 61 and the second holding member. The optical cables 71 and 72 include four fibers 71a, 71b, 71c, 71d, 72a and 72, respectively.
It has b, 72c and 72d. Of these, the fiber 71a is connected to the optical terminal L1 formed in the first sub case 12, and the fiber 71b is connected to the optical terminal L2 formed in the second sub case 13. The optical terminal L1 is connected to the optical / electrical converter 122, and the optical terminal L2 is electric / electrical.
It is connected to the optical converter 135.

On the other hand, the fibers 72a and 72b are not connected to any terminals and are in an open state.
The fibers 71c and 71d are connected to the fibers 72c and 72d by welding. These fibers 71c and 72c are downstream optical signals, and the fiber 71
d and 72d respectively transmit an upstream optical signal, and the present repeater merely mechanically repeats the fiber.

Next, the arrangement of terminals for connecting each case and the motherboard, which is a characteristic part of the present invention, will be described. As shown in FIG. 3, the main case side connection terminals A1 and A2 are arranged on the surface of the main body case 11 facing the motherboards 41, 42, and 43 at a 180-degree rotational symmetry position with respect to the rotation center axis O. Has been done. Further, in order to take out the monitor signal, the main case side monitor connection terminals D1, D2, E1, E
2 are respectively arranged, and terminals D1 and D2 are central axes O
The terminals E1 and E2 are arranged point-symmetrically with respect to the central axis O.

On the other hand, in the mother boards 41 and 42, as shown in FIG.
As shown in FIG. 5, board-side connection terminals A1 ′ and A2 ′ that engage with the main-case-side connection terminals A1 and A2 are arranged point-symmetrically with respect to the central axis O. Similarly, the board-side monitor connection terminals D1 ′, D2 ′, E1 ′, E2 ′ are engaged with the main case side monitor connection terminals D1, D2, E1, E2.
Respectively, the terminals D1 ′ and D2 ′ are arranged point-symmetrically with respect to the central axis O, and the terminals E1 ′ and E2 ′ are arranged point-symmetrically with respect to the central axis O.

Further, the mother board 42 of the second sub-case 13
The main case side branch connection terminal B1 is disposed on the left and right center lines on the surface facing to, and in order to connect the second sub case 13 and the main body case 11 with respect to the down trunk signal, the bottom peripheral portion is provided. Connection terminals C1 and C2 are provided. Further, a connection terminal F1 is provided in order to take out a monitor signal from the second sub case 13 to the motherboards 42, 41 via the main body case 11. For these connections, on the surface of the main body case 11 that is joined to the second sub case 13, connection terminals C1 ′, C that engage with the connection terminals C1, C2, F1.
2'and F1 'are formed.

Regarding the branch system, the first sub-case 12
On the main case side branch connection terminal B2 is formed,
First sub case 12, main body case 11, and second sub case 13
In the main case 10 in which the above are combined, the main case side branch connection terminals B2 and B1 are arranged at 180-degree rotational symmetry positions with respect to the rotation center axis O. On the other hand, on the mother board 42, the board side branch connection terminals B1 ′ and B2 ′ which are engaged with the terminals B1 and B2 are 18 with respect to the rotation center axis O.
It is arranged at a 0-degree rotational symmetry position.

Further, the branch case 30 is the branch case 3
The branch case side branch connection terminals G1 and G2 are arranged at 180-degree rotational symmetry positions with respect to the central axis W of 0.
Board side branch connection terminals G1 ', G at the 80 degree rotational symmetry position
2'is provided. In the mother board 43, the terminals B1 ′ and G1 ′ are connected, and the terminals B2 ′ and G2 ′ are connected.

Further, in the branch case 30, the branch case side branch terminals H1 and H2 for inputting / outputting a branch signal are point-symmetric with respect to the central axis W, and the branch case side branch terminals J1 and J are provided.
2 are arranged point-symmetrically with respect to the central axis W, and branch case side branch monitor terminals K1 and K2 for outputting a branch monitor signal are arranged point-symmetrically with respect to the central axis W, respectively. Further, on the motherboards 41 and 42, board side branch terminals H1 ', H2', J1 ', J2' and board side branch monitor terminals K1 'that engage with the above terminals H1, H2, J1, J2, K1, K2. And K2 ′ are arranged point-symmetrically with respect to the central axis W.

In the above-mentioned structure, the main body case 11, the first sub-case 12 and the second sub-case 1 are connected in the connection relationship shown in FIG.
3 (above, main case 10), branch case 30 to housing 50
When it is arranged in each of the above positions, the respective normal postures are obtained. In this state, the first terminal 52 of the housing 50 is open, and the fiber 71 of the optical cable 71 held by the first holding member 61.
a and 71b are respectively connected to the optical terminals L1 and L2 by an optical connector, the second terminal 55 becomes an output terminal of the downstream electric signal, and the fibers 72a and 72b of the optical cable 72 held by the second holding member 62 are It is open.

When it is desired to use the first terminal 52 of the housing 50 as the output terminal for the downstream signal and the optical cable 72 as the input side for the downstream signal, the attitude of the housing 50 is left unchanged and the optical cable 7 is used.
Fibers 71a and 71b of No. 1 are removed from the optical terminals L1 and L2, the combined main case 10 is rotated 180 degrees, the branch case 30 is also rotated 180 degrees, and attached to the motherboards 41, 42 and 43, and the fiber of the optical cable 72 is connected. 72a and 72b are connected to the optical terminals L1 and L2, respectively. At this time, terminals A1, A2 on the main case side
E1, E2, D1 and D2 are respectively the mother board 4
1, 42 side terminals A2 ', A1', E2 ', E1', D
2'and D1 'are respectively connected.

The terminals B1 and B2 are connected to the mother board 42.
Terminals B2 'and B1'. further,
Regarding the branch case 30, terminals H1, H2, J1, J
2, K1 and K2 are terminals H on the motherboard side, respectively.
2 ', H1', J2 ', J1', K2 ', K1' are connected. In this way, the main case 10 and the branch case 3
Even if 0 is inverted, the symmetry of the circuit is not broken. Therefore, the optical signal of the downlink signal is input from the optical cable 72, the downlink electrical signal is output from the first terminal 52, and the branch electrical signal is output from each branch terminal. It becomes possible to output, convert the upstream electrical signal input from each branch signal into an optical signal, mix it with the trunk upstream signal, and transmit it from the second terminal 56. Further, it becomes possible to monitor the upstream and downstream trunk signals and branch signals. However, the main line signal monitor terminal becomes the upstream output monitor terminal and the downstream input monitor terminal becomes the downstream output monitor terminal in the normal posture and the inverted posture.

The extra fiber inside the housing is stored in a fiber storage case (not shown) in a wound state, and the fibers 71c and 71d and the fiber 72 are stored.
The welded portion with c and 72d is in this fiber storage case.

[Brief description of drawings]

FIG. 1 is an assembly diagram showing assembly of the configuration of an apparatus according to a specific embodiment of the present invention.

FIG. 2 is a circuit diagram showing a circuit configuration in the apparatus of the embodiment.

FIG. 3 is an explanatory diagram showing an arrangement relationship of terminals of each case and a motherboard.

[Explanation of symbols]

 10 ... Main case 11 ... 1st sub case 12 ... 2nd sub case 30 ... Branch case 41, 42, 43 ... Mother board 50 ... Housing 52 ... 1st terminal 56 ... 2nd terminal 61 ... 1st holding member 62 ... 2 holding members 71, 72 ... Optical cables A1, A2 ... Main case side connection terminals A1 ', A2' ... Board side connection terminals B1, B2 ... Case side branch connection terminals B1 ', B2' ... First board side branch connection terminals G1 , G2 ... Branch case side branch connection terminal G1 ', G2' ... Second board side branch connection terminal J1, J2, H1, H2 ... Branch case side branch terminal J1 ', J2', H1 ', H2' ... Board side 1 Main terminals L1, L2 ... Optical terminals

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tatsuya Ohashi 15 Aichi Electronics Co., Ltd. Kani Factory, 15-1 Shimogirihimegaoka, Kani City, Gifu Prefecture

Claims (9)

[Claims] 1. A first terminal, a second terminal for inputting and outputting a high frequency electric signal by a coaxial cable, and a first holding member and a second holding member for passing and holding an optical cable are formed on left and right end faces, respectively. A box-shaped casing, a first power separating filter arranged on the side of the first terminal for separating electric power from the mother board arranged on the bottom of the case, and arranged on the side of the second terminal. CATV capable of converting an optical signal and an electric signal having a second power separation filter and a frequency equalizer
In the repeater, the first power separation filter is arranged on the first terminal side of the motherboard, the second power separation filter is arranged on the second terminal side of the motherboard, and the signal is transmitted by the optical cable. An optical / electrical converter for converting an optical signal into an electric signal and the frequency equalizer for equalizing the converted electric signal are arranged in one metal main case, and the motherboard of the main case is provided. A pair of main case side connection terminals for inputting and outputting an electric signal are provided on the outer surface facing to the surface at a rotational symmetry position of 180 degrees with respect to the rotation center axis of the main case perpendicular to the surface, An optical terminal for connecting the optical cable is formed in a case, and the pair of main terminals is provided at a position 180 ° rotationally symmetrical with respect to the rotation center axis on the motherboard arranged in the housing. Pair of board-side connection terminals that are engaged with the power-side connection terminals and are respectively connected to the first terminal via the first power separation filter and to the second terminal via the second power separation filter. The main case with respect to the normal posture and the rotation center axis.
When the main case-side connection terminal and the board-side connection terminal are engageable with each other in two postures, that is, the inverted posture rotated by 0 degree, and when the main case is in the regular posture, it is supplied from the first holding member. An optical cable is connected to the optical terminal, and when the main case is in the inverted position, the optical cable supplied from the second holding member is connected to the optical terminal. 2. The CATV repeater is bidirectional, and further comprises a main case side connection terminal on the output side of the down signal of the pair of main case side connection terminals in the main case. A demultiplexing filter for separating an upstream signal and a downstream signal to be connected and an electrical / optical converter for converting an electrical signal into an optical signal and supplying the optical signal to the optical terminal are provided, and the optical terminal is for a downstream optical signal. The CATV repeater according to claim 1, wherein one pair is provided for the upstream optical signal. 3. A first sub-case in which the main case contains a receiving optical terminal for receiving an optical signal and the optical / electrical converter, a transmitting optical terminal for transmitting an optical signal, and the electric / optical converter. 3. The CATV according to claim 2, wherein the CATV includes a second sub-case containing therein, a main case having the demultiplexer, the frequency equalizer, and the main case side connection terminal.
Repeater. 4. The first holding member and the second holding member respectively hold an optical cable, and at least one fiber is relayed and transmitted as an optical signal. The CATV repeater according to 1. 5. The CATV repeater is a repeater capable of branching a signal, and has a metal branch case having a built-in branch amplifier for amplifying the branched signal, and the case is provided with a branch signal. A branch terminal for outputting to the outside is provided, and a main case side branch connection terminal is provided at the rotation center axis position of the main case on the outer surface of the main case facing the motherboard. A first board side branch connection terminal that engages with the main case side branch connection terminal is provided, and a branch signal is input from the main case through the motherboard on the outer surface facing the motherboard in the branch case. A branch case side branch terminal and a branch case side branch terminal for outputting a branch signal are provided, and the motherboard is provided with a second case that engages with the branch case side branch connection terminal. The CATV repeater according to claim 1, further comprising a board-side branch connection terminal and a board-side branch terminal connected to the branch case-side branch terminal and connected to the branch terminal of the housing. 6. The CATV repeater is an amplifier capable of branching a signal, and has a metal branch case containing a branch amplifier for amplifying the branched signal, and the casing outputs a branch signal. And a pair of first board-side branch connection terminals formed on the motherboard at 180-degree rotational symmetry with respect to the rotation center axis of the main case. On the facing outer surface, a main case side branch connection terminal that outputs a downward branch signal that is engageable with one of the pair of first board side branch connection terminals in the normal posture and the inverted posture of the main case is provided. A board connected to the pair of second board side branch connection terminals and the branch terminal of the housing at a position 180 ° rotationally symmetrical with respect to the rotation center axis of the branch case on the motherboard. Branch terminals are formed on the outer surface of the branch case facing the mother board in two positions, that is, a normal position of the branch case and an inverted position rotated by 180 degrees with respect to a rotation center axis thereof. A branch case side branch connection terminal that is engageable with one of a pair of second board side branch connection terminals and is used to input a down branch signal from the main case via the motherboard, and the board side branch terminal. A branch case side branch terminal for outputting a combined branch signal is provided, and the main case and the branch case can be used in two postures of a normal posture and an inverted posture rotated by 180 degrees. The CATV repeater according to 1. 7. The CATV repeater is a repeater capable of branching a signal, and has a metal branch case having a built-in branch amplifier for amplifying the branched signal, and the case is provided with a branch signal. Case-side branch connection terminals each having a branch terminal for outputting and provided on an outer surface of the main case facing the motherboard, the pair of case-side branch connection terminals being the rotation of the main case. The main case is formed in a rotationally symmetric position of 180 degrees with respect to the central axis, and the motherboard has a rotationally symmetric position of 180 degrees with respect to the central axis of rotation of the main case regardless of the normal posture and the inverted posture of the main case. First, a pair of first board-side branch connection terminals engageable with the pair of case-side branch connection terminals are formed, and the branch case has an outer surface facing the motherboard. 18 with respect to the central axis of rotation of the serial branch casing
A pair of branch case side branch connection terminals for inputting or outputting a signal to the main case and a branch case side branch terminal for inputting / outputting a branch signal are provided at a 0 ° rotational symmetry position, and the motherboard is provided with the branch point. Regardless of two postures, a normal posture of the branch case and a reversal posture rotated by 180 degrees with respect to the rotation center axis, at a position of 180 degrees rotational symmetry with respect to the rotation center axis of the case, the pair of branches. A pair of second board-side branch connection terminals that engage with the case-side branch connection terminals and a board-side branch terminal that is connected to the branch terminals of the housing are provided, and the main case and the branch case are in normal postures. The CATV repeater according to claim 2, wherein the CATV repeater can be used in two positions, that is, an inverted position rotated by 180 degrees. 8. A set of the first terminal side and the second terminal side for monitoring the potential at a predetermined point in the main case is provided on the outer surface of the main case facing the motherboard. A pair of main-case-side monitor connection terminals are arranged at 180-degree rotational symmetry positions with respect to the central axis of the main case, and a pair is provided on the motherboard at 180-degree rotational symmetry positions with respect to the central axis. 8. The main case side monitor connection terminal is provided with a board side monitor connection terminal that engages regardless of the normal posture and the inverted posture of the main case. The CATV repeater described. 9. A pair of branch case side branch monitor connection terminals for monitoring the potential at a predetermined point in the branch case are provided on the outer surface of the branch case facing the motherboard, and a pair of branch case side branch monitor connection terminals are provided at the center of the branch case. The pair of pairs are arranged at 180-degree rotational symmetry with respect to the axis, and one pair are provided at the motherboard at 180-degree rotational symmetry with respect to the central axis. 8. A board-side branch monitor connection terminal is provided which is engaged regardless of whether it is in a reverse orientation or a reverse orientation.
ATV repeater.