CN203368503U

CN203368503U - Four-channel optical fiber standard frequency module based on Ethernet bus realizable soft and hard cross switching

Info

Publication number: CN203368503U
Application number: CN 201320418920
Authority: CN
Inventors: 俞春华; 张剑锋; 谢铎
Original assignee: Panda Electronics Group Co Ltd; Nanjing Panda Handa Technology Co Ltd
Current assignee: Panda Electronics Group Co Ltd; Nanjing Panda Handa Technology Co Ltd
Priority date: 2013-07-15
Filing date: 2013-07-15
Publication date: 2013-12-25
Anticipated expiration: 2023-07-15

Abstract

The utility model provides a four-channel optical fiber standard frequency module based on Ethernet bus realizable soft and hard cross switching. The four-channel optical fiber standard frequency module comprises a power supply module, a power divider, four photovoltaic conversion circuits, a PPC chip, a FPGA chip, four SRAM chips, two FLASH chips, two Ethernet interface chips, an RS232 interface chip, a radio-frequency switch chip and two LVDS exchange chips. The power supply module is used to supply power to the above-mentioned power divider, the photovoltaic conversion circuits, the PPC chip, the FPGA chip, the SRAM chips, the FLASH chips, the Ethernet interface chips, the RS232 interface chip, the radio-frequency switch chip and the LVDS exchange chips. The FPGA chip, the SRAM chips, the FLASH chips, the Ethernet interface chips, the RS232 interface chip, the radio-frequency switch chip and the LVDS exchange chips are all connected with the above-mentioned PPC chip. According to the utility model, the soft and hard exchange of the LVDS can be realized by using the FPGA or PPC chips separately, and the Ethernet bus mode is adopted between the four-channel optical fiber standard frequency module and a master control module, so advantages of high transmission rate, good communication reliability, etc., can be realized.

Description

Can realize the four-way optical fiber mark frequency module of soft or hard intersection switching based on industry ethernet

Technical field

The utility model belongs to electronic circuit design field, and particularly relevant for a kind of four-way optical fiber mark frequency module that can realize the switching of soft or hard intersection based on industry ethernet.

Background technology

Existing mark frequency module generally only provides a road radiofrequency signal, if the mark frequency signal on four tunnels will be provided, needs four mark frequency modules, and module is many, takes up room many.Because need to transferring the signal of telecommunication of digital intermediate frequency to light signal, multi-band communication systems gives distant transmitter simultaneously, photoelectric conversion module in the past only has the photoelectric converting function on a road, just need four such photoelectric conversion modules, also have a fairly large number of problem.

The utility model content

The utility model purpose be to provide a kind of there is long transmission distance, the advantages such as transmission rate is high, good in anti-interference performance can realize that based on industry ethernet soft or hard intersects the four-way optical fiber mark frequency module of switching.

For reaching above-mentioned purpose, the utility model proposes a kind of four-way optical fiber mark frequency module that can realize the switching of soft or hard intersection based on industry ethernet, comprise power module, power splitter, 4 photoelectric switching circuits, 1 PPC chip, 1 fpga chip, 4 sram chips, 2 FLASH chips, 2 Ethernet chips, 1 RS232 interface chip, radio-frequency (RF) switch chip and two LVDS exchange chips, the above-mentioned power splitter of electric power source pair of module wherein, 4 photoelectric switching circuits, 1 PPC chip, 1 fpga chip, 4 sram chips, 2 FLASH chips, 2 Ethernet chips, 1 RS232 interface chip, radio-frequency (RF) switch chip and two LVDS exchange chip power supplies, 1 fpga chip, 4 sram chips, 2 FLASH chips, 2 Ethernet chips, 1 RS232 interface chip, radio-frequency (RF) switch chip and two LVDS exchange chips all connect above-mentioned PPC chip,

Wherein, the PPC chip is inputted outside LVDS level signal or inner crystal oscillator source by radio-frequency (RF) switch, marking signal frequently by the radio-frequency (RF) switch chip selects, and use power splitter to distribute mark frequently after signal, to offer respectively outside digital intermediate frequency module and FPGA circuit, the PPC chip is responsible for inner each chip of control and management, 2 too the network interface chip realize respectively external ethernet communication and serial communication, 2 FLASH chips connect the working procedure of being responsible for preserving PPC, when just powering up startup, PPC enters Vxworks operating system by the guiding of Flash chip, SRAM is for preserving the data of PPC chip processing procedure.Fpga chip is realized the soft switch of digital intermediate frequency LVDS signal, then the digital medium-frequency signal of each passage is converted to light signal by 4 photoelectric switching circuits and is sent to far-end RF module by optical fiber.

Further,, the model that the model that the model that the model that wherein model of PPC chip is MPC8280, FPGA circuit is EP2SGX30,4 sram chips is K4S511632,2 FLASH chips is S29GL512N10F, 2 Ethernet chips is that the model that LXT971AL and H1102, the model of radio-frequency (RF) switch chip are PE4259 and two LVDS exchange chips is DS10CP154.

In sum, the utility model adopts software radio thought, uses PPC and FPGA to coordinate, and except using FPGA, realizes the soft switch of LVDS, also can realize by the PPC chip controls the hard exchange of Different L VDS signal, thereby realize the flexible exchange of the intermediate frequency data between different passages.And what between main control module, adopt is the industry ethernet form, and transmission rate is high, and communication reliability is good.Can realize that software is loaded by bus, need not open machine, so there is software programmable flexibly, convenient, level and smooth upgrade function.

The accompanying drawing explanation

Fig. 1 is the inside and outside theory diagram connected of the utility model embodiment four-way optical fiber mark frequency module.

The concrete schematic diagram of the four-way optical fiber mark frequency module that Fig. 2 is the utility model embodiment.

Embodiment

In order more to understand technology contents of the present utility model, especially exemplified by specific embodiment and coordinate appended graphic being described as follows.

As shown in Figure 1, four-way optical fiber mark frequency module is communicated by letter with master control system by industry ethernet, and the digital signal of outside 4 road ifd modules is by the LVDS level transmissions to four-way optical fiber mark frequency module, and section becomes light signal after by 4 tunnel opto-electronic conversion within it.Optical fiber mark frequency module is connected to come transmitting optical signal by optical fiber with 4 road radio-frequency modules of distant transmitter.

The concrete schematic diagram of the four-way optical fiber mark frequency module that Fig. 2 is the utility model embodiment.The four-way optical fiber mark frequency module that can realize the switching of soft or hard intersection based on industry ethernet comprises power module, power splitter, 4 photoelectric switching circuits, 1 PPC chip, 1 fpga chip, 4 sram chips, 2 FLASH chips, 2 Ethernet chips, 1 RS232 interface chip, radio-frequency (RF) switch chip and two LVDS exchange chips, there is long transmission distance, transmission rate is high, the advantage of good in anti-interference performance.

Wherein above-mentioned power splitter, 4 photoelectric switching circuits, 1 PPC chip, 1 fpga chip, 4 sram chips, 2 FLASH chips, 2 Ethernet chips, 1 RS232 interface chip, radio-frequency (RF) switch chip and the two LVDS exchange chip power supplies of electric power source pair of module, 1 fpga chip, 4 sram chips, 2 FLASH chips, 2 Ethernet chips, 1 RS232 interface chip all are connected above-mentioned PPC chip with radio-frequency (RF) switch chip and two LVDS exchange chips.Wherein, the PPC chip is inputted outside LVDS level signal or inner crystal oscillator source by radio-frequency (RF) switch, marking signal frequently by the radio-frequency (RF) switch chip selects, and use power splitter to distribute mark frequently after signal, to offer respectively outside digital intermediate frequency module and FPGA circuit, the PPC chip is responsible for inner each chip of control and management, 2 too the network interface chip realize respectively external ethernet communication and serial communication, 2 FLASH chips connect the working procedure of being responsible for preserving PPC, when just powering up startup, PPC enters Vxworks operating system by the guiding of Flash chip, SRAM is for preserving the data of PPC chip processing procedure.Fpga chip is realized the soft switch of digital intermediate frequency LVDS signal, then the digital medium-frequency signal of each passage is converted to light signal by 4 photoelectric switching circuits and is sent to far-end RF module by optical fiber.

The utility model has realized providing for 4 outside intermediate frequency process modules the purpose of unified high accurate clock signal, and the signal source is the high stable crystal oscillator of inside modules, can be also from outside standard frequency source.This module is converted to light signal by the intermediate frequency LVDS signal of the digital intermediate frequency module of four outsides simultaneously, then gives external radio frequency module at a distance.And this module software radio thought, use PPC and FPGA to coordinate, except using FPGA to realize the soft switch of LVDS, also can realize by the PPC chip controls the hard exchange of Different L VDS signal, can complete the soft or hard intersection switching of 4 paths LVDS signals, thereby realize the flexible exchange of the intermediate frequency data between different passages.And what between main control module, adopt is the industry ethernet form, can reach 20Km, has long transmission distance, and transmission rate is high, the advantage of good in anti-interference performance.And transmission rate is high, communication reliability is good, can realize that software is loaded by bus, need not open machine, so have software programmable flexibly, convenient, level and smooth upgrade function.

1, the source of intermediate frequency LVDS signal, this module can realize soft switch and the hard exchange of digital intermediate frequency LVDS signal, wherein uses FPGA to realize the soft switch of LVDS signal, realizes the hard exchange of LVDS signal by PPC chip controls DS10CP154.When realizing the soft switch of LVDS signal, FPGA adopts crystal oscillator source or outside standard frequency source that unified clock signal is provided.

2, the specific implementation process of soft switch and hard exchange

As depicted in figs. 1 and 2, the PPC chip is controlled respectively the LVDS exchange chip and fpga chip is exchanged 4 road LVDS signals.The LVDS exchange chip plays hard exchange, two LVDS exchange chips are configured and exchange according to control signal S00, S01, S10, S11, S20, S21, S30, S31 ，Dui tetra-road LVDS differential signal OP1 (being comprised of OP_TX1, OP_RX1 etc.), OP2 (being comprised of OP_TX2, OP_RX2 etc.), OP3 (being comprised of OP_TX3, OP_RX3 etc.), OP4 (being comprised of OP_TX4, OP_RX4 etc.) respectively.LVDS signal after exchange is first via MF1 signal (being comprised of MF_TX1, MF_RX1 etc.), the second road MF2 signal (being comprised of MF_TX2, MF_RX2 etc.), Third Road MF3 signal (being comprised of MF_TX3, MF_RX3 etc.), tetra-road MF4 signals (being comprised of MF_TX3, MF_RX3 etc.).

Before and after LVDS exchange chip control signal and exchange, four road LVDS signal corresponding relations are in Table 1.

Table 1

Fpga chip plays soft switch, and fpga chip is configured and exchanges according to PPC control signal DQ9B, DQ7B, DQ5B, DQ3B, DQ1B ，Dui tetra-road LVDS signals respectively.Before and after control signal and exchange, four road LVDS signal corresponding relations are in Table 2.

Although the utility model discloses as above with preferred embodiment, so it is not in order to limit the utility model.Have and usually know the knowledgeable in technical field under the utility model, within not breaking away from spirit and scope of the present utility model, when being used for a variety of modifications and variations.Therefore, protection range of the present utility model is as the criterion when looking claims person of defining.

Claims

1. can realize based on industry ethernet the four-way optical fiber mark frequency module that the soft or hard intersection is switched for one kind, it is characterized in that, comprise: power module, power splitter, 4 photoelectric switching circuits, 1 PPC chip, 1 fpga chip, 4 sram chips, 2 FLASH chips, 2 Ethernet chips, 1 RS232 interface chip, radio-frequency (RF) switch chip and two LVDS exchange chips, the above-mentioned power splitter of electric power source pair of module wherein, 4 photoelectric switching circuits, 1 PPC chip, 1 fpga chip, 4 sram chips, 2 FLASH chips, 2 Ethernet chips, 1 RS232 interface chip, radio-frequency (RF) switch chip and two LVDS exchange chip power supplies, 1 fpga chip, 4 sram chips, 2 FLASH chips, 2 Ethernet chips, 1 RS232 interface chip, radio-frequency (RF) switch chip and two LVDS exchange chips all connect above-mentioned PPC chip,

Wherein, the PPC chip is inputted outside LVDS level signal or inner crystal oscillator source by radio-frequency (RF) switch, marking signal frequently by the radio-frequency (RF) switch chip selects, and use power splitter to distribute mark frequently after signal, to offer respectively outside digital intermediate frequency module and FPGA circuit, the PPC chip is responsible for inner each chip of control and management, 2 too the network interface chip realize respectively ethernet communication and the serial communication with master control system, 2 FLASH chips connect the working procedure of being responsible for preserving PPC, when just powering up startup, PPC enters Vxworks operating system by the guiding of Flash chip, SRAM is for preserving the data of PPC chip processing procedure, fpga chip is realized the soft switch of digital intermediate frequency LVDS signal, then the digital medium-frequency signal of each passage is converted to light signal by 4 photoelectric switching circuits and is sent to far-end RF module by optical fiber.

2. according to claim 1ly based on industry ethernet, can realize that soft or hard intersects the four-way optical fiber mark frequency module of switching, it is characterized in that, the model that the model that the model that the model that wherein model of PPC chip is MPC8280, FPGA circuit is EP2SGX30,4 sram chips is K4S511632,2 FLASH chips is S29GL512N10F, 2 Ethernet chips is that the model that LXT971AL and H1102, the model of radio-frequency (RF) switch chip are PE4259 and two LVDS exchange chips is DS10CP154.