A ToD signal distributor and signal time difference adjustment method thereof

Abstract

The present invention discloses a ToD signal distributor and a signal time difference adjustment method thereof, belonging to the technical field of time frequency signal transmission and distribution. It distributes an input 1-way ToD signal and outputs 8-way ToD signals with high-precision phase consistency. The delay control of each signal can be completed in the power-on state, supporting real-time delay adjustment for online running systems. The device supports cascading use, thereby realizing "8×N"-way ToD signal distribution network and delay control. The present invention supports "group delay" adjustment of online single devices or cascade distribution networks, which can effectively reduce the inconsistency error between parallel channels of electronic information systems, and provide high-consistency ToD signal services for various electronic information systems.

Description

Technical Field

[0001] The present invention relates to the technical field of time-frequency signal transmission and distribution, and in particular to a ToD signal distributor and a signal time difference adjustment method thereof. Background Art

[0002] Various electronic information systems often have multiple identical parallel channels to work together, which requires these parallel channels to have good inter-channel consistency, and requires ToD signal distribution equipment with high-precision phase consistency to provide different channels with ToD signals representing the accurate time information of the system. The output signal phases of each channel of a common ToD signal distribution device are often inconsistent, and do not have the ability to adjust the single-channel delay. The inconsistency error of the ToD reference signal of each parallel channel will directly affect the magnitude of the inter-channel system error of each channel. Therefore, the phase consistency of the ToD signal output by the ToD signal distribution device is extremely important for various electronic information systems. Summary of the invention

[0003] In view of this, the present invention provides a ToD signal distributor and a signal time difference adjustment method thereof. The distributor can distribute one input ToD signal and output 8 ToD signals with high-precision phase consistency, effectively reducing the inconsistency error between parallel channels of the electronic information system.

[0004] In order to achieve the above object, the technical solution adopted by the present invention is:

[0005] A ToD signal distributor with adjustable time delay, comprising a chassis and a ToD signal distribution board, wherein the chassis is provided with 1 input port and 8 output ports; the ToD signal distribution board comprises 1 ToD distribution circuit, 8 ToD signal delay modules, 8 driving amplifier circuits and 8 ToD signal output interfaces; the 8 ToD signal delay modules correspond to the 8 driving amplifier circuits one by one, and the output end of the ToD signal delay module is connected to the input end of the driving amplifier circuit; the input ends of the 8 ToD signal delay modules are connected to the output end of the ToD distribution circuit through equal length lines; the output end of the driving amplifier circuit is connected to the corresponding ToD signal output interface;

[0006] The eight output ports on the chassis are connected to the eight ToD signal output interfaces through radio frequency cables of equal length; and the input port on the chassis is connected to the input end of the ToD distribution circuit.

[0007] The ToD signal in the ToD signal delay module enters from point B, passes through point C, point E, and point O in sequence, and is finally output from point F; wherein the CE segment is an arc segment, the EO segment is the radius of the arc segment, and the BC segment and the OF segment are both straight line segments; the length of the CE is adjustable.

[0008] Furthermore, the CE segment is a part of the notch circle, wherein point C is the beginning of the notch circle, point D is the end of the notch circle, and E is any point between segments CD.

[0009] A signal time difference adjustment method based on a delay-adjustable ToD signal distributor, characterized in that a delay-adjustable ToD signal distributor as described above is adopted, and the specific steps are as follows:

[0010] Step 1, adjusting the point E of the ToD signal delay module of the first channel to the middle position of the CD segment;

[0011] Step 2, using a time difference measuring instrument to measure the time difference ΔT of the ToD signal of the second output port and the first output port of the ToD signal distributor in turn, and adjusting the length of the CE segment in the second ToD signal delay module until ΔT≤0.01ns;

[0012] Step 3, switch the measurement port of the time difference measuring instrument to the third output port, fourth output port, fifth output port, sixth output port, seventh output port and eighth output port of the ToD signal distributor in turn, and adjust the ToD signal delay modules of the corresponding paths for alignment to ensure that the signal time difference with the first path is ≤0.01ns; finally, the output ToD signal time difference between any two paths is ≤0.02ns.

[0013] The beneficial effects of the above technical solution of the present invention are:

[0014] The present invention distributes one input ToD signal and outputs eight ToD signals with high-precision phase consistency. The delay control of each signal can be completed in the power-on state, supporting real-time delay adjustment for online operating systems. The device supports cascading use, thereby realizing an "8×N" ToD signal distribution network and delay control. The device supports "group delay" adjustment of an online single device or a cascade distribution network, and can provide high-uniformity ToD signal services for electronic information systems. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the ToD signal delay module of the present invention.

[0016] Figure 2 It is a schematic diagram of a ToD signal distribution board of the present invention.

[0017] Figure 3 This is a composition diagram of the ToD signal distributor of the present invention. DETAILED DESCRIPTION

[0018] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0020] A delay-adjustable ToD signal distributor, characterized in that by controlling the delay of each ToD signal, one input ToD signal can be distributed and 8 ToD signals with high-precision phase consistency can be output. To achieve the above method, the following steps are included:

[0021] ① A "ToD signal delay module" is designed to adjust the delay of the ToD signal. The module can delay the ToD signal by 0ns-0.20ns. The schematic diagram of the ToD signal delay module is shown in the figure. Figure 1 As shown. The "ToD signal delay module" adopts a "notch circle" structure. The ToD signal enters the module from point B, passes through points C, E, and O in sequence, and is output from point F. The radius of the "notch circle" is 20mm. You can use a screwdriver to twist OE at point O so that point E of OE slides on the "notch circle" to adjust the delay. The delay adjustment range of the "notch circle" is 0ns-0.20ns. When OE slides to point C, the corresponding delay is 0, and when OE slides to point D, the corresponding delay is 0.20ns.

[0022] ② Based on the "ToD signal delay module", a "ToD signal distribution board" is designed that can independently control the delay of each ToD signal. This board can realize the delay control of 8 ToD signals. The schematic diagram of the ToD signal distribution board is shown in the figure. Figure 2As shown, the "ToD signal distribution board" consists of a ToD input interface K, ToD signal delay modules 1 to 8, drive amplifier circuits 1 to 8, and ToD signal output interfaces K1 to K8. The ToD distribution circuit divides the input ToD signal into 1 to 8 branches and sends them to the ToD signal delay modules 1 to 8 respectively. Among them, AB1, AB2, AB3, AB4, AB5, AB6, AB7, and AB8 are equal-length lines formed by PCB wiring, and have the same transmission delay for the ToD signal. The drive amplifier circuits 1 to 8 drive and amplify the signals output by the ToD signal delay modules 1 to 8 respectively, and send them to the ToD signal output interfaces K1 to K8. Among them, F1G1, F2G2, F3G3, F4G4, F5G5, F6G6, F7G7, and F8G8 are equal-length lines formed by PCB wiring, and have the same transmission delay for ToD signals; H1K1, H2K2, H3K3, H4K4, H5K5, H6K6, H7K7, and H8K8 are equal-length lines formed by PCB wiring, and have the same transmission delay for ToD signals.

[0023] ③ Based on the "ToD signal distribution board", a "ToD signal distributor" is designed to perform time delay alignment on the output ToD signal. The composition of the ToD signal distributor is shown in the figure below: Figure 3 Use RF cables to connect the IN terminal of the chassis to the M terminal of the board, and use RF cables of equal length to connect the OUT1 to OUT8 terminals of the chassis to the K1 to K8 terminals of the board respectively.

[0024] ④ Adjust the delay of the "ToD signal delay module" of channel 1 to about 0.05ns.

[0025] ⑤ Use the time difference measuring instrument to accurately measure the time difference ΔT between the ToD signals output by the "ToD signal distributor" OUT2 and OUT1, and adjust the "ToD signal delay module" of the second channel to make ΔT ≤ 0.01ns.

[0026] ⑥ Repeat step ⑤ to align the 3rd to 8th channels respectively, and finally achieve the ToD signal time difference between any two output channels is ≤ 0.02ns.

[0027] Furthermore, the invention is characterized in that the delay control of each signal can be completed in the power-on state, supporting real-time delay adjustment for the online operating system.

[0028] Furthermore, the device is characterized in that it supports cascading use, thereby realizing an "8×N" ToD signal distribution network and delay control (here, N is a positive integer).

[0029] Furthermore, the device is characterized in that it supports "group delay" adjustment of an online single device or a cascade distribution network.

[0030] like Figure 1 to Figure 3 As shown, a ToD signal distributor with adjustable delay specifically includes the following steps:

[0031] ① A "ToD signal delay module" is designed to adjust the delay of the ToD signal. The module can delay the ToD signal by 0ns-0.20ns. The schematic diagram of the ToD signal delay module is shown in the figure. Figure 1 As shown. The "ToD signal delay module" adopts a "notch circle" structure. The ToD signal enters the module from point B, passes through points C, E, and O in sequence, and is output from point F. The radius of the "notch circle" is 20mm. You can use a screwdriver to twist OE at point O so that point E of OE slides on the "notch circle" to adjust the delay. The delay adjustment range of the "notch circle" is 0ns-0.20ns. When OE slides to point C, the corresponding delay is 0, and when OE slides to point D, the corresponding delay is 0.20ns.

[0032] ② Based on the "ToD signal delay module", a "ToD signal distribution board" is designed that can independently control the delay of each ToD signal. This board can realize the delay control of 8 ToD signals. The schematic diagram of the ToD signal distribution board is shown in the figure. Figure 2 As shown, the "ToD signal distribution board" consists of a ToD input interface K, ToD signal delay modules 1 to 8, drive amplifier circuits 1 to 8, and ToD signal output interfaces K1 to K8. The ToD distribution circuit divides the input ToD signal into 1 to 8 branches and sends them to the ToD signal delay modules 1 to 8 respectively. Among them, AB1, AB2, AB3, AB4, AB5, AB6, AB7, and AB8 are equal-length lines formed by PCB wiring, and have the same transmission delay for the ToD signal. The drive amplifier circuits 1 to 8 drive and amplify the signals output by the ToD signal delay modules 1 to 8 respectively, and send them to the ToD signal output interfaces K1 to K8. Among them, F1G1, F2G2, F3G3, F4G4, F5G5, F6G6, F7G7, and F8G8 are equal-length lines formed by PCB wiring, and have the same transmission delay for ToD signals; H1K1, H2K2, H3K3, H4K4, H5K5, H6K6, H7K7, and H8K8 are equal-length lines formed by PCB wiring, and have the same transmission delay for ToD signals.

[0033] ③ Based on the "ToD signal distribution board", a "ToD signal distributor" is designed to perform time delay alignment on the output ToD signal. The composition of the ToD signal distributor is shown in the figure below: Figure 3 Use RF cables to connect the IN terminal of the chassis to the M terminal of the board, and use RF cables of equal length to connect the OUT1 to OUT8 terminals of the chassis to the K1 to K8 terminals of the board respectively.

[0034] ④ Adjust the delay of the "ToD signal delay module" of channel 1 to about 0.05ns.

[0035] ⑤ Use the time difference measuring instrument to accurately measure the time difference ΔT between the ToD signals output by the "ToD signal distributor" OUT2 and OUT1, and adjust the "ToD signal delay module" of the second channel to make ΔT ≤ 0.01ns.

[0036] ⑥ Repeat step ⑤ to align the 3rd to 8th channels respectively, and finally achieve the ToD signal time difference between any two output channels is ≤ 0.02ns.

[0037] The delay-adjustable ToD signal distributor is also characterized in that the delay control of each signal can be completed in the power-on state, supporting real-time delay adjustment for the online operating system.

[0038] The delay-adjustable ToD signal distributor is also characterized in that the device supports cascading use, thereby realizing an "8×N" ToD signal distribution network and delay control (here, N is a positive integer).

[0039] The delay-adjustable ToD signal distributor is also characterized in that the device supports "group delay" adjustment of an online single device or a cascade distribution network.

[0040] In summary, a ToD signal distributor with adjustable delay is proposed, which distributes one input ToD signal and outputs eight ToD signals with high-precision phase consistency. The delay control of each signal can be completed in the power-on state, supporting real-time delay adjustment for online running systems. The device supports cascading use, thereby realizing an "8×N" ToD signal distribution network and delay control. The device supports "group delay" adjustment of an online single device or cascade distribution network, which can effectively reduce the inconsistency error between parallel channels of electronic information systems, and provide high-consistency ToD signal services for various electronic information systems.

Claims

1. A signal time difference adjustment method based on a delay-adjustable ToD signal distributor, characterized in that: A ToD signal distributor with adjustable time delay is adopted for implementation. The ToD signal distributor includes a chassis and a ToD signal distribution board. The chassis is provided with 1 input port and 8 output ports; the ToD signal distribution board includes 1 ToD distribution circuit, 8 ToD signal delay modules, 8 driving amplifier circuits and 8 ToD signal output interfaces; the 8 ToD signal delay modules correspond to the 8 driving amplifier circuits one by one, and the output end of the ToD signal delay module is connected to the input end of the driving amplifier circuit; the input ends of the 8 ToD signal delay modules are connected to the output end of the ToD distribution circuit through equal-length lines; the output end of the driving amplifier circuit is connected to the corresponding ToD signal output interface; The eight output ports on the chassis are connected to the eight ToD signal output interfaces through RF cables of equal length; the input port on the chassis is connected to the input end of the ToD distribution circuit; The ToD signal in the ToD signal delay module enters from point B, passes through point C, point E, point O in sequence, and is finally output from point F; wherein the CE segment is an arc segment, the EO segment is the radius of the arc segment, and the BC segment and the OF segment are both straight line segments; the length of the CE segment is adjustable; The CE segment is a part of the notch circle, wherein point C is the beginning of the notch circle, point D is the end of the notch circle, and E is any point between segments CD; The specific steps of the signal time difference adjustment method are as follows: Step 1, rotate the EO segment to adjust the E point of the first ToD signal delay module to the middle position of the CD segment; Step 2, using a time difference measuring instrument to measure the time difference ∆T of the ToD signal at the second output port and the first output port of the ToD signal distributor in turn, and adjusting the length of the CE segment in the second ToD signal delay module until ∆T≤0.01ns; Step 3, switch the measurement port of the time difference measuring instrument to the third output port, fourth output port, fifth output port, sixth output port, seventh output port and eighth output port of the ToD signal distributor in turn, and adjust the ToD signal delay modules of the corresponding paths for alignment to ensure that the signal time difference with the first path is ≤0.01ns; finally, the output ToD signal time difference between any two paths is ≤0.02ns.

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