Channel board card matrix cabinet

Abstract

The utility model discloses a channel board card matrix cabinet, which comprises 16 input cards, 16 pre-stage switching cards, 16 cascade switching cards, 16 post-stage switching cards and 16 output cards, 16 input ends of each input card are used as input ends of the channel board card matrix cabinet, 16 output ends of each input card are respectively connected with an input end of one preceding stage switching card, and an output end of each preceding stage switching card is respectively connected with an input end of one cascade switching card. The output end of each cascade switching card is connected with the input end of one post-stage switching card, the output end of each post-stage switching card is connected with the input end of one output card, and 16 output ends of each output card are used as the output ends of the channel board card matrix cabinet. And independent random selection of 256 paths of input signals by 256 paths of output ports is realized.

Description

Technical Field

[0001] The utility model relates to the field of data transmission control, and particularly relates to a channel board card matrix cabinet. Background Art

[0002] In order to realize the effective exchange of information between multiple systems, new requirements are put forward for the information exchange capacity of cascade nodes. Therefore, such a large-capacity switching matrix comes into being. At the same time, higher reliability requirements are imposed on the switching matrix because it is related to the information exchange function of the entire system. Therefore, in order to improve the reliability of the system and shorten the time for troubleshooting, it is necessary to design a single-function circuit module for the equipment. At the same time, in order to realize the rapid disassembly and replacement of the functional module, the module design concept at the board card level comes into being. The equipment of the large-capacity channel switching board card matrix cabinet accounts for an increasing proportion, and users have higher and higher requirements for the technical indicators, volume, rapid maintainability and power consumption of the equipment.

[0003] At present, the space vertical interconnection technology is used to realize the full switching function. The equipment has too large a volume and great manufacturing difficulty. At the same time, there are too many cascade lines and great maintenance difficulty, which cannot meet the requirements of quickly locating problems and quickly maintaining the current system, and it is gradually difficult to adapt to the current general unit board card technology trend. Content of the Utility Model

[0004] Aiming at the above deficiencies in the prior art, the channel board card matrix cabinet provided by the utility model solves the problems of too large volume, great manufacturing difficulty, too many cascade lines and great maintenance difficulty of the existing channel board card equipment.

[0005] In order to achieve the above-mentioned utility model purpose, the technical solution adopted by the utility model is: a channel board card matrix cabinet, including 256 input ends and 256 output ends, 16 input cards, 16 pre-stage switching cards, 16 cascade switching cards, 16 post-stage switching cards and 16 output cards;

[0006] Each of the input card, pre-stage switching card, cascade switching card, post-stage switching card and output card includes 16 input ends and 16 output ends;

[0007] The 16 input ends of each input card are used as the input ends of the channel board card matrix cabinet. The 16 output ends of each input card are respectively connected to the input ends of 1 pre-stage switching card. The output ends of each pre-stage switching card are respectively connected to the input ends of 1 cascade switching card. The output ends of each cascade switching card are respectively connected to the input ends of 1 post-stage switching card. The output ends of each post-stage switching card are respectively connected to the input ends of 1 output card. The 16 output ends of each output card are used as the output ends of the channel board card matrix cabinet.

[0008] Further: Each of the input cards includes a 16-channel input signal processing unit, and the input end and the output end of each channel input signal processing unit serve as one input end and one output end of the input card respectively;

[0009] Each of the input signal processing units includes a broadband coupler, a digital controlled attenuator, an amplifier, and a π-type attenuator that are connected in sequence. The broadband coupler is also respectively connected to a detector, the digital controlled attenuator is also connected to a control circuit, the control circuit is connected to a control module through an SPI serial port, and all the broadband couplers in the 16-channel input signal processing units are also connected to a 16-to-1 data selector.

[0010] Further: The pre-stage switching card, the cascading switching card, and the post-stage switching card are all switching cards with the same structure. Each of the switching cards includes 16 input amplifiers, 16 16-way power dividers, 16 16-to-1 switches, and 16 output amplifiers;

[0011] The input end of each of the input amplifiers serves as the input end of the switching card. The output end of each of the input amplifiers is connected to one of the 16-way power dividers. The 16-way power divider includes 16 output ends. The output end of each of the 16-way power dividers is connected to the input end of one of the 16-to-1 switches. The output end of each of the 16-to-1 switches is connected to one of the output amplifiers. Each of the output amplifiers serves as the output end of the switching card.

[0012] Further: Each of the output cards includes a 16-channel output signal processing unit, and the input end and the output end of each channel output signal processing unit serve as one input end and one output end of the output card respectively;

[0013] Each of the output signal processing units includes a digital controlled attenuator, an amplifier, a broadband coupler, and a π-type attenuator that are connected in sequence. The broadband coupler is also respectively connected to a detector, the digital controlled attenuator is also connected to a control circuit, the control circuit is connected to a control module through an SPI serial port, and all the broadband couplers in the 16-channel signal processing units are also connected to a 16-to-1 data selector.

[0014] Further: The channel board card matrix cabinet is equipped with a cable extractor and screws, and the input card, the pre-stage switching card, the cascading switching card, the post-stage switching card, and the output card are all pluggable.

[0015] Further: Couplers are also provided at each input end and output end of the channel board card matrix cabinet.

[0016] The beneficial effects of the present utility model are:

[0017] 1. Complete the program-controlled switching of L-band signals, and achieve independent and arbitrary selection of 256 input signals by 256 output ports;

[0018] 2. Adopt a single-function circuit module design, which improves the reliability of the system and shortens the time for troubleshooting;

[0019] 3. Adopt a plug-and-play structure, which is easy to replace and maintain;

[0020] 4. Couplers are set at the input port and the output port. The coupled signal converts the radio frequency signal into a voltage signal through a detection chip, and the detected voltage signal is transmitted to the control module, which can monitor the level of the input port and the output port and give an input saturation alarm. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is the schematic diagram of the channel board card matrix cabinet.

[0022] Figure 2 It is the schematic diagram of the input card.

[0023] Figure 3 It is the schematic diagram of the switching card.

[0024] Figure 4 It is the schematic diagram of the output card. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] The following describes the specific embodiments of the present invention to facilitate those skilled in the art to understand the present invention. However, it should be clear that the present invention is not limited to the scope of the specific embodiments. For those of ordinary skill in the art, as long as various changes are within the spirit and scope of the present invention defined and determined by the appended claims, these changes are obvious, and all inventions and creations using the concept of the present invention are within the scope of protection.

[0026] As Figure 1 shown, in an embodiment of the present invention, a channel board card matrix cabinet is provided, which includes 256 input ends and 256 output ends, 16 input cards, 16 pre-stage switching cards, 16 cascaded switching cards, 16 post-stage switching cards and 16 output cards;

[0027] Each of the input card, pre-stage switching card, cascaded switching card, post-stage switching card and output card includes 16 input ends and 16 output ends;

[0028] The 16 input terminals of each of the input cards serve as the input terminals of the channel board card matrix cabinet. The 16 output terminals of each input card are respectively connected to the input terminals of one of the pre-stage switching cards. The output terminals of each pre-stage switching card are respectively connected to the input terminals of one of the cascaded switching cards. The output terminals of each cascaded switching card are respectively connected to the input terminals of one of the post-stage switching cards. The output terminals of each post-stage switching card are respectively connected to the input terminals of one of the output cards. The 16 output terminals of each output card serve as the output terminals of the channel board card matrix cabinet.

[0029] The 16 input cards are combined to form 256 RF signal inputs. Signal self-check, signal amplitude adjustment, and signal amplitude amplification and other functions are implemented on the input cards. The pre-stage switching card realizes the full switching function of 16 groups of 16-channel input signals through a 16×16 full-switching card. The cascading card realizes the full switching function of 16 groups of 16-channel signals. The post-stage switching card realizes the full switching conversion of 256 channels of signals to the output card, and the output card realizes the transfer output function of 256 channels of signals.

[0030] The cross combination of 16 input interface cards, 16 output interface cards, 16 pre-stage switching cards, 16 cascaded switching cards, and 16 post-stage switching cards can meet 256×256 full switching.

[0031] As Figure 2 shown, each of the input cards includes 16-channel input signal processing units. The input terminal and the output terminal of each input signal processing unit serve as one input terminal and one output terminal of the input card respectively.

[0032] Each of the input signal processing units includes a broadband coupler, a digital control attenuator, an amplifier, and a π-type attenuator connected in sequence. The broadband coupler is also respectively connected to a detector. The digital control attenuator is also connected to a control circuit. The control circuit is connected to a control module through an SPI serial port. All the broadband couplers in the 16 input signal processing units are also connected to a sixteen-to-one data selector.

[0033] In this embodiment, the model of the broadband coupler used is PSCB-2-30-D, and the model of the digital control attenuator used is BW161SM5.

[0034] As Figure 3 shown, the pre-stage switching card, the cascaded switching card, and the post-stage switching card are all switching cards with the same structure. Each of the switching cards includes 16 input amplifiers, 16 sixteen-way power dividers, 16 sixteen-to-one switches, and 16 output amplifiers.

[0035] The input end of each of the input amplifiers serves as the input end of the switching card, the output end of each of the input amplifiers is connected to one of the sixteen-way power dividers, the sixteen-way power divider includes 16 output ends, the output end of each of the sixteen-way power dividers is connected to the input end of one of the sixteen-to-one switches, the output end of each of the sixteen-to-one switches is connected to one of the output amplifiers, and each of the output amplifiers serves as the output end of the switching card.

[0036] As Figure 4 shown, each of the output cards includes a 16-channel output signal processing unit, and the input end and output end of each channel output signal processing unit serve as one input end and one output end of the output card respectively;

[0037] Each of the output signal processing units includes a numerically controlled attenuator, an amplifier, a broadband coupler, and a π-type attenuator connected in sequence. The broadband coupler is also connected to a detector respectively. The numerically controlled attenuator is also connected to a control circuit. The control circuit is connected to a control module through an SPI serial port. All the broadband couplers in the 16-channel signal processing units are also connected to a sixteen-to-one data selector.

[0038] As a preference of this embodiment, the channel board card matrix cabinet is equipped with a pull assistor and screws. The input card, the front-stage switching card, the cascade switching card, the rear-stage switching card, and the output card are all pluggable and can be directly disassembled through the front and rear panels, which is easy to replace and maintain.

[0039] As a preference of this embodiment, a coupler is also provided at each input end and output end of the channel board card matrix cabinet;

[0040] A coupler is provided at the input port and the output port. The coupled signal converts the radio frequency signal into a voltage signal through a detection chip, and transmits the detected voltage signal to the control module. When the detected input level value exceeds the input saturation level, the system will issue a saturation alarm.

[0041] As a preference of this embodiment, a three-dimensional interconnection method can be adopted between the input card, the front-stage board card, the cascade board card, the rear-stage board card, and the output card, which effectively reduces the cascading difficulty, improves the board card cascading efficiency, and improves the maintainability of the device at the same time.

[0042] The main technical indicators of the channel board card matrix cabinet of this application are as follows:

[0043] Input / output interface: 256 / 256;

[0044] Operating frequency: 0.5 GHz to 2.2 GHz;

[0045] Input VSWR: ≤1.5:1;

[0046] Output VSWR: ≤1.5:1;

[0047] Gain adjustment range: -10 dB to 10 dB;

[0048] Amplitude-frequency response (for all channels except the test channel, any input is selected and no load is added):

[0049] In-band ripple: ≤2.5 dBp-p;

[0050] Gain slope: ≤0.3 dB / 10 MHz (worst value), ≤0.15 dB / 10 MHz (typical value 86%);

[0051] Isolation between output ports:

[0052] ≥50 dB (the same input is selected for the test channel and no load is added);

[0053] ≥75 dB (any different input is selected for the test channel and no load is added);

[0054] Input-output isolation: ≥76 dB;

[0055] Input-output reverse isolation: ≥52 dB;

[0056] Noise figure: ≤17.5 dB (0 dB gain);

[0057] Input P-1dB: ≥2 dBm (0 dB gain).

[0058] In this embodiment, the RF input and output interface used is SMA-50K; the control interface is CT55-8ZSD40 (RJ45); the power interface is XCD22F4Z1P40.

[0059] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "thickness", "upper", "lower", "horizontal", "top", "bottom", "inner", "outer", "radial", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the number of technical features. Therefore, the features defined by "first", "second", "third" may explicitly or implicitly include one or more of such features.

Claims

1. A channel card matrix cabinet, comprising 256 input terminals and 256 output terminals, characterized in that: Includes 16 input cards, 16 front-stage switch cards, 16 cascade switch cards, 16 back-stage switch cards and 16 output cards; Each of the input card, the front-stage switch card, the cascade switch card, the rear-stage switch card and the output card includes 16 input ports and 16 output ports; The 16 input ends of each input card serve as the input ends of the channel board matrix cabinet, the 16 output ends of each input card are respectively connected to the input end of one of the front-stage switching cards, the output end of each of the front-stage switching cards are respectively connected to the input end of one of the cascade switching cards, the output end of each of the cascade switching cards are respectively connected to the input end of one of the rear-stage switching cards, the output end of each of the rear-stage switching cards are respectively connected to the input end of one of the output cards, and the 16 output ends of each of the output cards serve as the output ends of the channel board matrix cabinet.

2. The channel card matrix cabinet according to claim 1, characterized in that: Each of the input cards comprises 16 input signal processing units, and the input end and the output end of each input signal processing unit serve as one input end and one output end of the input card respectively; Each of the input signal processing units includes a broadband coupler, a digitally controlled attenuator, an amplifier and a π-type attenuator connected in sequence, the broadband coupler is also connected to the detector respectively, the digitally controlled attenuator is also connected to the control circuit, the control circuit is connected to the control module through the SPI serial port, and all the broadband couplers in the 16 input signal processing units are also connected to the sixteen-to-one data selector.

3. The channel card matrix cabinet according to claim 1, characterized in that: The front-stage switch card, the cascade switch card and the rear-stage switch card are all switch cards with the same structure, and each of the switch cards includes 16 input amplifiers, 16 16-way power dividers, 16 16-choose-1 switches and 16 output amplifiers; The input end of each input amplifier serves as the input end of the switching card, the output end of each input amplifier is connected to one of the sixteen-way power dividers, the sixteen-way power divider includes 16 output ends, the output end of each of the sixteen-way power dividers is connected to the input end of one of the sixteen-to-one switches, the output end of each of the sixteen-to-one switches is connected to one of the output amplifiers, and each of the output amplifiers serves as the output end of the switching card.

4. The channel card matrix cabinet according to claim 1, characterized in that: Each of the output cards comprises 16 output signal processing units, and the input end and the output end of each output signal processing unit serve as one input end and one output end of the output card respectively; Each output signal processing unit includes a digitally controlled attenuator, an amplifier, a broadband coupler and a π-type attenuator connected in sequence, the broadband coupler is also connected to the detector respectively, the digitally controlled attenuator is also connected to the control circuit, the control circuit is connected to the control module through the SPI serial port, and all the broadband couplers in the 16 signal processing units are also connected to the sixteen-to-one data selector.

5. The channel card matrix cabinet according to claim 1, characterized in that: The channel card matrix cabinet is equipped with a pull-out aid and screws, and the input card, front-stage switching card, cascade switching card, rear-stage switching card and output card are all plug-in and pull-out types.

6. The channel card matrix cabinet according to claim 1, characterized in that: Each input end and output end of the channel card matrix cabinet is also provided with a coupler.

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