CN1163679A - CATV tap - Google Patents
CATV tap Download PDFInfo
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- CN1163679A CN1163679A CN 95195483 CN95195483A CN1163679A CN 1163679 A CN1163679 A CN 1163679A CN 95195483 CN95195483 CN 95195483 CN 95195483 A CN95195483 A CN 95195483A CN 1163679 A CN1163679 A CN 1163679A
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- deconcentrator
- port
- power supply
- signal
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Abstract
A splitter or tap for use in a communications network, particularly a community antenna television (CATV) network comprising: an in port for receiving an incoming signal; a through port for an outgoing signal; means for splitting-off a first portion of power from the incoming signal and for passing a second portion of the power to the through port; and a removable power distribution module that can receive said first portion of power and that has at least one power output.
Description
The present invention relates to a kind of tap (tap) that in communication network, particularly in community antenna television (CATV) (CATV) net, uses or deconcentrator (splitter).
Although the network in using has various structures, they all comprise a cable that lays from transmitter or relay station, must be switched to the user to signal by cable.Tapping point appears at usually on several positions of cable.Therefore, the necessary energy of tap receiving inputted signal is isolated a part of signal, and remaining signal is sent to the next deconcentrator in downstream.If used device is not to be used for being user's separation signal, just be called deconcentrator usually, rather than tap.For convenience, unified in this article " deconcentrator " this term that uses.
Network operator need provide power supply to the user usually, and this power supply can transmit along same leader cable with the deconcentrator interconnection easily.Therefore, this cable will transmit the AC power supplies of low frequency normally and such as the composite signal of high frequency signals such as radio frequency (RF) signal.In this case, deconcentrator also has the additional function of isolating power supply from the composite signal of input.
We find that under study for action the conditioned disjunction that the deconcentrator structure of using at present is not easy to adapt to the specific occasion is the requirement of network.Therefore, according to the number of users of each deconcentrator, the requirement of decay, and the requirement of power distribution mode must produce the product of multiple different structure.The present invention has designed a kind of deconcentrator that can be regarded as modular construction in order to overcome these problems.
Deconcentrator provided by the present invention comprises:
The input port that is used for receiving inputted signal;
The straight-through port that is used for output signal;
A device is used for isolating first's power supply from input signal, and the second portion power supply is sent to straight-through port; And comprise selectively
A detachable power distribution assembly is used to receive above-mentioned first power supply, and has at least one power output end.
Another kind of new invention is a deconcentrator, and it comprises:
The input port that is used for receiving inputted signal;
The straight-through port that is used for output signal;
Signal allocation port (signal drop port);
A physically detachable circuit is used for isolating first from input signal, sends it under signal line cap, and the second portion from the input signal of input port is sent to straight-through port; And
A switch forms the electric interconnection of input port and straight-through port when being used for disconnect circuit physically.
Above various features can make up.
Further embodied content of the present invention in the accompanying drawings, wherein:
Fig. 1 is the perspective view of a deconcentrator;
Fig. 2 A, 2B, 2C and 2D represent the sectional view of a switch of deconcentrator inside;
Fig. 3 A and 3B represent the fragmentary, perspective view of line cap under the deconcentrator power supply;
Figure 4 and 5 are represented the perspective view of a deconcentrator and a power distribution assembly;
Cable seal mode under Fig. 6-8 expression on the line cap;
Cable seal mode on Fig. 9-11 expression master port;
Sealing means on the master port that Figure 12 represents to be blocked; And
Figure 13 and 14 represents to be equipped with a detachable lid of deconcentrator circuit.
Fig. 1 represents to be adapted at a deconcentrator 1 of use in the CATV net.Deconcentrator 1 comprises a shell 2, have various port on its outer surface, be used to connect various input and output cables, and portion is provided with electronic circuit and switch etc. within it, can be used for separating input signal and/or separate power supplies and high fdrequency component, and required decay is provided.
As mentioned above, this deconcentrator is installed on the point of leader cable circuit in the CATV net, separates or tapped off signal at this point, so that send it to user.This deconcentrator 1 has an input port, and (port 3 is used to all online arrangements, and port 4 is used to all butt joint arrangements), be used to receive the signal that cable provides from a CATV transmitter, and the straight-through port (port 5 or port 6 are used to arrangement online and butt joint respectively) that is connected to a cable, this cable further sends signal (or part signal) to for example another similar deconcentrator by network.Deconcentrator is isolated a part of input signal, and provides it to line cap 7 under the signal, and the cable that rolls off the production line that offers the user is connected on the port 7.This deconcentrator for example can have 2,4,6,8 or more this distribution port 7
Deconcentrator does not need the online of leader cable or butt joint arrangement are selected when connecting.Otherwise it can only have 3 or 5 ports, or 4 or 6 ports (or the same) are only arranged.No port can resemble hereinafter described be blocked.
Need provide the television set of signal or other equipment also needs an external power source that is generally 60v AC usually by deconcentrator 1.This power supply also obtains from deconcentrator 1 usually, promptly receives this power supply by deconcentrator 1 by the leader cable that is connected to port 3 or 4.Like this, leader cable just needs to transmit a kind of power supply and high frequency (being commonly referred to RF or radio frequency) signal of combination.
Can provide power supply to the user by the cable that rolls off the production line that is connected to down on the line cap 7, so this port 7 also needs to transmit the power supply and the high-frequency signal of combination.Yet, if the user does not wish to provide 60 volts of power supplys on his television set rolls off the production line cable, do just improperly like this, so we would rather provide power supply to the user by the power line of special use.
Therefore on deconcentrator 1, be provided with special-purpose power distribution port 8.Cutting out partial power supply and be sent to port 8 from the incoming line, remaining power supply is sent to straight-through port (5 or 6), offers the next deconcentrator in downstream.Deconcentrator comprises a low pass filter usually, is used for removing high-frequency signal from the power supply signal that rolls off the production line.
On the port of deconcentrator, can be provided with for example device of otch 9 one classes, or other groove or protuberance, be used to guarantee environmental sealing, so that plug is closed in sealing input cable or installing.
Fig. 2 A is the sectional view that is similar to the deconcentrator of Fig. 1 (substantially along the plane that is parallel to paper and be to see from behind).Fig. 2 B is the sectional view that the arrow in Fig. 2 A extracts, and Fig. 2 C is the sectional view vertical with this direction with 2D.
In Fig. 2 A-2D, can see shell 2, input port 3 and 4, straight-through port 5 and 6, and distribute port.
The port of design can connect coaxial cable (though the port that connects other cables can be provided), and we preferably can receive the cable connector that is connected on the cable socket by the plug-in type port of design, or are used for directly receiving the cable that is made into the stairstepping termination.Be used for the contact 10 of inner conductor and the contact 11 that is connected outer conductor as we can see from the figure.
The switch 12 that is made of current collector 12A and 12B as can also be seen from Figure, it makes input port (3,4) form with straight-through port (5,6) when the closing of contact and is electrically connected.Therefore, when switch closure, input signal just directly is sent to straight-through port from input port, is split into down on the line cap without any signal.
Yet,, switch 12 is opened if install a suitable branch line circuit.Like this, the direct path between input port and the straight-through port just has been cut off, and by a minute line circuit these ports that interconnect, more a part of signal is sent to down line cap 7.Do not represent this circuit in Fig. 2 A-2D, therefore, switch 12 is closed.This circuit can be installed in detachable covering, when placing lid, it should be in Fig. 2 A directly over, and contact 12A and 12B branch are opened.
The lower metal surface of shell 2, for example the right side wall shown in Fig. 2 B can constitute a ground plane.All moving-members of switch preferably move substantially abreast with this ground plane, so that the high frequency characteristics of deconcentrator is changed when moving in the contact.
For the deconcentrator for the downstream under the situation that lacks the deconcentrator circuit provides service, need this switch 12; Also may need to remove sort circuit, so that replace its (for example more or less partition line, or for repair or upgrade) with different circuit.Operation when removing this circuit preferably should not cause the temporary transient interruption of service, therefore, can cause when reality is removed this circuit:
1. (pass through switch) and make input port and straight-through port realize being electrically connected; Then
2. the electrical connection of open circuit on input and the straight-through port.
Similarly, when after this changing circuit, should before cutting off direct connection of switch 12 disconnections, (passing through circuit) between input and straight-through port, finish connection.
For fear of the situation (just the connection between input and the straight-through port is a situation about finishing by switch and circuit both sides) that circuit does not put in place fully occurring, preferably make circuit pass through a position, on this position, finish connection (1), but do not carry out the action (2) that disconnects, above-mentioned position is not stable.
Preferably realize connecting (1) and disconnect (2) by single motion (for example by breaking away from the rectilinear motion of shell).Also wish in addition to finish connection/disconnection, rather than remove clamp or unlocked device in advance by the action that reality is removed.
Fig. 2 A, 2C and 2D have also expressed device 13, and it can be from input port 3 or 4 coils to straight-through port 5 or 6 transmission power supplys.Device 13 preferably can play the effect of low pass filter, or only transmits power supply basically, does not just have tangible high frequency, RF or other signals enter input port.In order to provide power supply to the user, device 13 preferably can play the effect of power supply separation or tap.Power supply can obtain from the mid point such as coil, just line cap under the power supply of representing with port 8 among Fig. 1.
Though carry out filtering in deconcentrator inside by installing 13, also can consider further filtering.This further filtering can be finished in an additional supply allocation component of the following stated.
Fig. 3 A and 3B represent how to remove lid from power distribution port 8.Lid can as shown in Figure 3A, or can cut the lid of integral body or welding by directly pulling out or unclamping screw and remove shown in Fig. 3 B.
Fig. 4 represents that line cap 8 under the power supply from the outer surface that is positioned at deconcentrator shell 2 removed a deconcentrator after the lid.In port 8, can see a kind of gel or other inner sealing materials 15.A power distribution assembly 16 is just being prepared to be connected on the deconcentrator, for example the inside and outside coaxial contact 17 on assembly 16 or 18 and following line cap 8 in corresponding contacts between be electrically connected.
Fig. 5 represents to be installed in the assembly 16 on the shell.Preferably not with 16 functions of finishing separate power supplies from the input signal of power supply and high frequency as the master of detachable assembly.Preferably the device that is used for separate power supplies is fixed within the main shell of deconcentrator at this.
Assembly can provide one of multiple function.For example, can give at least two power output ends 20 power distribution that the signal port from the deconcentrator shell 8 obtains with assembly, and/or be assigned to dissimilar outputs from port 8, for example be assigned to and be fit to connect the output of twisted-pair feeder rolling off the production line.The output of this power supply can be used for fixing the device that output rolls off the production line by insulation displacement connector or other and constitute.Preferably have the jockey that can connect two conductors in each outlet, for example be connected to twisted-pair feeder 21 device.Should have gel on each this output or other are used for the device of environmental sealing.The quantity of outlet should equal the to roll off the production line quantity of signal port is because each user needs his special-purpose independent current source usually.
By assembly 16 provide further or another function is filtering.Deconcentrator itself may not possess the filter that is used for removing from the power supply that rolls off the production line high-frequency signal, or existing filter can not meet the demands.Therefore need provide low pass or other suitable filtering performances by assembly 16.
The function of electic protection can increase or change.Can use overcurrent or over-pressure safety device in component internal, in order to avoid curtage is sensed or be applied to certain down on line cap, otherwise can damage deconcentrator circuit or the emission of front end or receiving equipment, or can damage other subscriber equipmenies.This device can also be protected subscriber equipment, prevents the infringement of the curtage on the main line between the deconcentrator.This device preferably can reset, and preferably can automatically reset.The overcurrent device that is suitable for comprises the device of being made by conducting polymer, and for example Raychem register of company trade mark is the product of Polyswitch.
Fig. 6-8 expression is sealed in down variety of way on the line cap 7 to cable 22.Fig. 6 represents to terminate to the cable 22 on the connector 23, and connector 23 adopts screw thread or other modes are fixed in the port 7.Connector 23, be enclosed in the sleeve pipe 24 near a part of cable 22 and the port 7 of connector end, thereby form environmental sealing.Sleeve pipe 24 is preferably made by flexible plastic material, comprises gel 15 or other encapsulants selectively, and has a clamp 26 selectively, be used for port 7 on for example the clamp of an otch 9 form engagement.Sleeve pipe 24 can have bellows or corrugated surface zone, so that crooked and/or flexible.Sleeve pipe and the cap 25 that can close the inside cable passage before the port have been represented to insert in the drawings, so that can be with the port of this bobbin seal free time.In order to represent the internal structure of sleeve pipe, also represented one section cross section of sleeve pipe 24 in the drawings.
The structure of in Fig. 7, having represented another kind of Sealed casing pipe.Sleeve pipe 27 has so-called structure around wrapping, thereby is installed in around the cable 22 can be on being connected to port 7 time.So just can under the condition of not interrupting user's service, realize another kind of sealing means.Sealed casing pipe 27 is made of the two parts at 28 places overlap joint, and has the clamp of port lock in make position.If special connector is very short and resemble shown in the figure not from the top of four ports when outstanding, can be connected to connector 23 on the port with instrument 30.Around dressing type sleeve pipe 27 snap-on fast, and can utilize 26 and 9 device to be locked on the port, want to reopen and it must be destroyed.Can prevent to steal the illegal act of signal like this from deconcentrator.
Among Fig. 6 and 7 particularly the sleeve pipe of Fig. 6 can be used for various cables and port sizes.
Fig. 8 A, 8B and 8C have represented how to come sealed port when not using the outside individual jacket of Fig. 6 and 7 shown types.Port 7 (particularly its contact 7A) can insert a hole 32 that (is limited by the upright cylindrical outer wall of surrounding threaded contacts 7A) in the deconcentrator outer surface.Encase port 7A with sleeve pipe 33.If connector 23 is connected on the port 7A, just can forces sleeve pipe 33 to touch the edge in hole, thereby form the sealing between connector and the outer surface with modes such as screw threads.
Fig. 9 and 10 expressions enter the mounting means around wrapping sealing and/or fixed sleeving 27 of the leader cable 35 of input and straight-through port.Can comprise a kind of gel or other encapsulants in the sleeve pipe.Similar shown in this sleeve pipe and Fig. 7 is just big.
Figure 11 is illustrated in the corrugated sleeve pipe 24 of a kind of Fig. 6 of being similar to that uses on the leader cable 35.
Figure 12 represents that a preparation installs to the sealing cap 36 on the port 4, wherein comprises gel or other encapsulants.Cap 36 after also having represented among the figure to install.
At cap 36, sleeve pipe 24 and sleeve pipe 27 and other are used on the device of environmental sealing a kind of device being set, and the gel that is used for it is comprised or uses or other encapsulants keep-up pressure.Preferably this encapsulant is keep-uped pressure, so that itself and sealed surface are kept in touch.Pressure can be kept by the elasticity of cap and sleeve pipe and/or deconcentrator shell.Also can adopt other or additional resilient clip.
Encapsulant preferably includes a kind of gel.Preferably include the polymeric material that a kind of oil expands.The circular cone osmotic value that the material that suggestion is adopted has is 80-400, and preferably 200-400 (0-1mm) (ASTMD217-68) and has and is at least 100% (ASTM D638-80), preferably is 200% ultimate elongation at least.Other perfect performance comprise the ultimate tensile strength (ASTM D412) less than 1MPa, less than the dynamic energy storage modulus (dynamic storage modulus) of 50KPa, and have the decline that is substantially zero under the temperature of 100 ℃ even 120 ℃.A kind of advantage as this gellike is can self sealss.Therefore, remove cable, can automatically recover environmental sealing when connector, assembly or circuit board etc.
The deconcentrator 1 that Figure 13 and 14 is represented has shell 2 and lid 37.In Figure 13, a physically detachable circuit is housed on the lid, element on the circuit board 38 as we can see from the figure, it is used for isolating first from the input signal of entry port 3, and send it under signal line cap 7, and the second portion of input signal is sent to straight-through port (from Figure 13 or 14 as seen).Remove lid 37 and can see open shell, and removed circuit.When removing the deconcentrator circuit, do not disturb the device that is used for the power supply tap that is located in the deconcentrator shell in this suggestion.
In Figure 13, following line cap 7 be installed on the deconcentrator with lid 37 opposite surfaces 39 on, thereby the dismounting by lid or change and cut off and connect being electrically connected between port and the circuit.Deconcentrator inside each down on line cap and the master port and above circuit on the relevant position some contact (not shown) can be set.
In Figure 14, following line cap 7 is installed on the detachable lid 39.At this moment, being connected between port and the circuit can be nonvolatil, but the shortcoming of this structure is in that to enter deconcentrator inboard or need disturb the distribution port that rolls off the production line when changing the lid on charged road.
Claims (19)
1. a deconcentrator comprises:
An input port that is used for receiving inputted signal;
A straight-through port that is used for output signal;
A device is used for isolating first's power supply from input signal, and the second portion power supply is sent to straight-through port; And
A detachable power distribution assembly is used to receive above-mentioned first power supply, and has at least one power output end.
2. according to the deconcentrator of claim 1, it is characterized in that the device that is used for separate power supplies isolates power supply basically individually from the power supply and the high-frequency signal of combination.
3. according to the deconcentrator of claim 1 or 2, it is characterized in that said modules comprises a low pass filter.
4. according to the deconcentrator of one of claim 1,2 and 3, it is characterized in that said modules comprises overcurrent and/or overvoltage protection.
5. according to the deconcentrator of above arbitrary claim, it is characterized in that said modules has at least two power output ends.
6. according to the deconcentrator of above arbitrary claim, it is characterized in that each power output end comprises an insulation displacement connector.
7. according to the deconcentrator of above arbitrary claim, it is characterized in that each power output end seals external environment condition.
8. according to the deconcentrator of claim 7, it is characterized in that environmental sealing is to provide by the device that is made of gel.
9. according to the deconcentrator of above arbitrary claim, it is characterized in that need not to remove the power supply separator just can remove said modules.
10. according to the deconcentrator of claim 9, it is characterized in that having line cap under an energy and the power supply that said modules cooperates.
11., it is characterized in that line cap is located on the outer surface of deconcentrator under the above-mentioned power supply according to the deconcentrator of claim 10.
12., it is characterized in that said modules is installed on the outer surface of deconcentrator according to the deconcentrator of above arbitrary claim.
13. deconcentrator according to above arbitrary claim, it is characterized in that having one can stube cable port, can enter this port by a hole on the deconcentrator outer surface, and there is a sleeve pipe to surround above-mentioned port, when connector is connected on the port, will force sleeve pipe to touch the edge in hole, thereby between connector and outer surface, form sealing.
14. according to the deconcentrator of above arbitrary claim, it is characterized in that having line cap under an energy and the power source special that said modules matches, be used to receive above-mentioned first power supply.
15., it is characterized in that having a device, be used for isolating first's high-frequency signal, and the second portion high-frequency signal from input signal is sent to straight-through port from input signal according to the deconcentrator of above arbitrary claim.
16. according to the deconcentrator of claim 15, it is characterized in that having line cap under the special signal, be used to receive above-mentioned first high-frequency signal.
17. a deconcentrator comprises:
An input port is used to receive the power supply and the high-frequency input signal of combination;
A straight-through port is used to export the power supply and the high-frequency signal of combination;
Line cap under the power supply; And
A device is used for isolating first's power supply basically individually from input signal, and sends it to the power distribution port, again the second portion power supply is sent to straight-through port.
18., it is characterized in that also comprising according to the deconcentrator of above arbitrary claim:
Line cap under the signal; And
A circuit is used for isolating first HFS from input signal, and sends it to line cap under the signal, and being sent to straight-through port from second HFS in the input signal of input port.
19., it is characterized in that also comprising according to the deconcentrator of claim 18:
The device that is used for direct interconnection input port and straight-through port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95195483 CN1163679A (en) | 1994-10-03 | 1995-09-26 | CATV tap |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9419881.9 | 1994-10-03 | ||
| CN 95195483 CN1163679A (en) | 1994-10-03 | 1995-09-26 | CATV tap |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1163679A true CN1163679A (en) | 1997-10-29 |
Family
ID=5082912
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95195483 Pending CN1163679A (en) | 1994-10-03 | 1995-09-26 | CATV tap |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1163679A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014089722A1 (en) * | 2012-12-11 | 2014-06-19 | Chang Chen-Fei | Indoor splitter for cable television system |
-
1995
- 1995-09-26 CN CN 95195483 patent/CN1163679A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014089722A1 (en) * | 2012-12-11 | 2014-06-19 | Chang Chen-Fei | Indoor splitter for cable television system |
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
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| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |