CN108155954B

CN108155954B - Programmable radio frequency network device

Info

Publication number: CN108155954B
Application number: CN201810128821.1A
Authority: CN
Inventors: 段建伟; 施利萍; 雷秀丽; 王晓燕; 魏军; 曾超; 陈玮; 曾琴; 冯新华; 岳立
Original assignee: Chengdu Aerospace Communication Equipment Co ltd
Current assignee: Chengdu Aerospace Communication Equipment Co ltd
Priority date: 2018-02-08
Filing date: 2018-02-08
Publication date: 2023-06-06
Anticipated expiration: 2038-02-08
Also published as: CN108155954A

Abstract

The invention discloses a programmable radio frequency network device, which comprises a shell, a communication control interface, radio frequency input ports CAL1, CAL2, CAL3, CAL4 and CAL5, an attenuator, an adder and 6 single-pole double-throw switches T1, T2, T3, T4, T5 and T6, wherein the communication control interface and the radio frequency input ports CAL1, CAL2, CAL3, CAL4 and CAL5 are arranged on the shell, and each single-pole double-throw switch is connected with an external processing unit through the communication control interface. The programmable radio frequency network device is respectively used for connecting a frequency spectrograph, a comprehensive tester, a signal source and communication equipment to be tested through a plurality of radio frequency input ports arranged on the shell, so that the purpose that all index items can be tested through one-time wiring is achieved. The attenuator and the single-pole double-throw switches are arranged in the shell, different parameters issued by the external processing unit are received, and the closing of each single-pole double-throw switch is configured, so that different radio frequency channel switching is realized, and a user can select different test items for testing.

Description

Programmable radio frequency network device

Technical Field

The present invention relates to a programmable radio frequency network device.

Background

Along with the complexity of the use environment of the communication equipment and the deterioration of the current electromagnetic environment, the requirements on the functions and indexes of the communication equipment are higher and higher, and various instruments such as a signal source, a spectrometer, a comprehensive tester and the like are required to be piled up in order to meet the quantitative test of a certain index of the communication equipment, and the conventional method is as follows: communication equipment and each instrument are communicated one by one through a plurality of tee joints or combiner, and are switched through a manual mode according to different test items, so that the connection process is very complicated, the switching frequency is very high, manpower is wasted, and the radio frequency head and the test instrument are worn by frequently plugging and unplugging radio frequency wires, so that the insertion loss of a test system is increased, and the test accuracy of each index is influenced. To solve this problem, the present invention proposes a programmable radio frequency network device.

Disclosure of Invention

To overcome the shortcomings of the prior art, the present invention provides a programmable radio frequency network device.

The technical scheme adopted by the invention is as follows: a programmable radio frequency network device comprising a housing and communication control interfaces and radio frequency input ports CAL1, CAL2, CAL3, CAL4, CAL5 provided on the housing, and attenuators, adders and 6 single pole double throw switches T1, T2, T3, T4, T5, T6 provided in the housing, each single pole double throw switch being connected to an external processing unit through the communication control interfaces, wherein: the single end of T1 is externally connected to a CAL4 point, the upper end of the double end of T1 is connected to the upper end of the double end of T2, the lower end of the double end of T1 is connected to the input end 1 of the adder, the lower end of the double end of T2 is connected to the output end of the adder, the single end of T3 is externally connected to a CAL3 point, the upper end of the double end of T3 is connected to the input end 2 of the adder, the upper end of the double end of T4 is connected to the single end of T2, the lower end of the double end of T4 is connected to the lower end of the double end of T3, the upper end of the double end of T4 is connected to the upper end of the double end of T6, the upper end of the double end of T5 is connected to the input end of the attenuator, the output end of the attenuator is externally connected to a CAL2 point, the single end of T5 is connected to the lower end of T6, and the single end of T6 is connected to a CAL5 point.

Compared with the prior art, the invention has the following positive effects:

the programmable radio frequency network device is respectively used for connecting a frequency spectrograph, a comprehensive tester, a signal source and communication equipment to be tested through a plurality of radio frequency input ports arranged on the shell, so that the purpose that all index items can be tested through one-time wiring is achieved. The attenuator and the single-pole double-throw switches are arranged in the shell, different parameters issued by the external processing unit are received, and the closing of each single-pole double-throw switch is configured, so that different radio frequency channel switching is realized, and a user can select different test items for testing.

Drawings

The invention will now be described by way of example and with reference to the accompanying drawings in which:

FIG. 1 is a front view of a programmable radio frequency network device;

FIG. 2 is an internal diagram of a programmable radio frequency network device;

fig. 3 is a diagram of the external connection of a programmable radio frequency network device.

Detailed Description

A programmable radio frequency network device, as shown in figure 1, comprises a shell 1, wherein five radio

frequency input ports

2, 3, 4, 5 and 9 are arranged on the shell 1 and are respectively used for connecting a spectrometer, a comprehensive tester, a signal source and communication equipment to be tested, wherein the radio frequency input port 9 is used for matching with the calibration of an attenuator, and the radio frequency input ports can be increased or decreased as required, so that the purpose of testing all index items by one-time wiring is achieved. The shell 1 is provided with a power switch and an indicator lamp 7, and the power switch and the indicator lamp are used for powering on the device and indicating the power-on condition. The shell 1 is provided with a 12V direct current power interface 8 which is used for powering on equipment. The shell 1 is provided with a communication control interface 6 which is used for controlling the closing of each single pole double throw switch inside. The inside of the shell 1 is provided with an attenuator and 6 single-pole double-throw switches, each single-pole double-throw switch is connected with an external processing unit through an RS232 interface, receives different parameters issued by the external processing unit, configures the closing of each single-pole double-throw switch, realizes the switching of different radio frequency channels, and allows a user to select different test items for testing.

As shown in fig. 2, the connection mode of the attenuator and the 6 single pole double throw switches is as follows:

t1, T2, T3, T4, T5 and T6 are respectively identical single-pole double-throw switches, CAL1, CAL2, CAL3, CAL4 and CAL5 are respectively 5 calibration points and are externally connected with a male end of L16, wherein a single end of T1 is connected to an external radio frequency port CAL4 point, the upper end of the double end of T1 is connected with the upper end of the double end of T2, the lower end of the double end of T1 is connected with the input end 1 of the adder, the upper end of the double end of T2 is connected with the upper end of the double end of T1, the lower end of the double end of T2 is connected with the output end of the adder, the single end of T3 is externally connected with the CAL3 point, the double-end upper end of T3 is connected with the input end 2 of the adder, the double-end upper end of T4 is connected with the single end of T2, the double-end lower end of T4 is connected with the double-end lower end of T3, the single end of T4 is connected with the upper end of T6, the double-end upper end of T5 is connected with an external CAL1 point, the double-end lower end of T5 is connected with the input end of the attenuator, the output end of the attenuator is connected with the CAL2 point, the single end of T5 is connected with the double-end lower end of T6, the double-end upper end of T6 is connected with the single end of T4, the double-end lower end of T6 is connected with the single end of T5, and the single end of T6 is connected with the CAL5 point.

As shown in fig. 3, five radio

frequency input ports

2, 3, 4, 5 and 9 on the housing of the programmable radio frequency network device are respectively connected with a spectrometer, a comprehensive tester, a signal source and communication equipment to be tested through radio frequency cables, wherein the radio frequency input port 9 is used for matching with the calibration of an attenuator, and a communication control interface 6 on the housing is connected with a USB port of a general-purpose computer host through a low-frequency communication cable, so that the insertion loss calibration of each link of the programmable radio frequency network device and the quantitative test of various indexes of the communication equipment to be tested can be realized.

In embodiment 1, for the present programmable radio frequency network device, the insertion loss calibration can be performed for each of the links CAL5-CAL4, CAL5-CAL3, CAL5-CAL2, and CAL5-CAL 1. Taking CAL5-CAL4 link calibration as an example, the CAL5 end is connected with a qualified signal source to generate a radio frequency signal of 30MHz and 0dBm, the CAL4 end is connected with a qualified spectrometer, and a central frequency point is set to be 30MHz; and the external processing unit is used for respectively controlling the T1 radio frequency switch to be closed upwards, the T2 radio frequency switch to be closed upwards, the T4 radio frequency switch to be closed upwards and the T6 radio frequency switch to be closed upwards, recording the amplitude of an output signal on the spectrometer at the moment and completing the insertion loss calibration of the link.

And the signal source and the connection method of the spectrometer are the same, namely the CAL5 end is connected with the signal source, the other end is connected with the spectrometer, and the calibration flow is the same as that of the CAL5-CAL4 link. The attenuator can be calibrated through CAL5-CAL2 and CAL5-CAL1, and the method comprises the following steps: the CAL5 is accessed to a qualified signal source to generate a radio frequency signal of 30MHz and 0dBm, the CAL2 is accessed to a qualified spectrometer, and a central frequency point is set to be 30MHz; the external processing unit is used for respectively controlling the T6 radio frequency switch to be closed downwards, the T5 radio frequency switch to be closed downwards, and the amplitude V1 of the output signal on the spectrometer at the moment is recorded; in the same way, the CAL5 end is accessed to a qualified signal source to generate a radio frequency signal of 30MHz and 0dBm, the CAL1 end is accessed to a qualified spectrometer, and a central frequency point is set to be 30MHz; the T6 radio frequency switch is respectively controlled to be closed downwards by the external processing unit, the T5 radio frequency switch is closed upwards, the amplitude V2 of the output signal on the spectrometer at the moment is recorded, and the attenuation value of the attenuator can be calibrated by calculating the V2-V1 value.

In embodiment 2, for the programmable radio frequency network device, if the sensitivity, the squelch sensitivity, the transmitting power, the modulating capability and the like of the radio station to be tested need to be tested, a CAL5-CAL3 link is needed to be used, and the T3 radio frequency switch is controlled to be closed downwards, the T4 radio frequency switch is controlled to be closed downwards, the T6 radio frequency switch is controlled to be closed upwards respectively through an external processing unit, and corresponding comprehensive tester parameters are adjusted to complete related tests.

In embodiment 3, for the programmable radio frequency network device, if parasitic response, sensitivity reduction anti-interference performance, cross modulation anti-interference performance and the like of a radio station to be tested are required to be tested, CAL5-CAL3 and CAL5-CAL4 links are required to be used, and through an external processing unit, the T1 radio frequency switch is controlled to be closed downwards, the T3 radio frequency switch is closed upwards, the T2 radio frequency switch is closed downwards, the T4 radio frequency switch is closed upwards, and corresponding comprehensive tester and signal source parameters are adjusted to complete related tests.

In embodiment 4, for the programmable radio frequency network device, if the radio station to be tested needs to be tested for harmonic emission, clutter emission and the like, a CAL5-CAL2 link is needed to be used, and through an external processing unit, the T5 radio frequency switch is controlled to be closed downwards, the T6 radio frequency switch is controlled to be closed downwards, and the amplitude of the output signal on the spectrometer at the moment is recorded to complete the related test.

Claims

1. A programmable radio frequency network device, characterized by: including shell and communication control interface and radio frequency input port CAL1, CAL2, CAL3, CAL4, CAL5 that set up on the shell to and attenuator, adder and 6 single pole double throw switch T1, T2, T3, T4, T5, T6 that set up in the shell, every single pole double throw switch all is connected with outside processing unit through communication control interface, wherein: the single end of T1 is externally connected to a CAL4 point, the upper end of the double end of T1 is connected to the upper end of the double end of T2, the lower end of the double end of T1 is connected to the input end 1 of the adder, the lower end of the double end of T2 is connected to the output end of the adder, the single end of T3 is externally connected to a CAL3 point, the upper end of the double end of T3 is connected to the input end 2 of the adder, the upper end of the double end of T4 is connected to the single end of T2, the lower end of the double end of T4 is connected to the lower end of the double end of T3, the upper end of the double end of T4 is connected to the upper end of the double end of T6, the upper end of the double end of T5 is connected to the input end of the attenuator, the output end of the attenuator is externally connected to a CAL2 point, the single end of T5 is connected to the lower end of T6, and the single end of T6 is connected to a CAL5 point; the radio frequency input ports CAL5 and CAL4 are respectively connected into a qualified signal source and a frequency spectrograph, and the radio frequency switches T1, T2, T4 and T6 are respectively controlled to be closed upwards by an external processing unit, so that the output signal amplitude of the frequency spectrograph is measured, and the insertion loss calibration of a CAL5-CAL4 link is realized; the radio frequency input ports CAL5 and CAL2 are respectively connected into a qualified signal source and a frequency spectrograph, and the T6 and T5 radio frequency switches are respectively controlled to be closed downwards through an external processing unit, so that the output signal amplitude V1 of the frequency spectrograph is measured; and the radio frequency input ports CAL5 and CAL1 are respectively connected into a qualified signal source and a spectrometer, the T6 radio frequency switch is respectively controlled to be closed downwards by an external processing unit, the T5 radio frequency switch is closed upwards, the output signal amplitude V2 of the spectrometer is measured, and the calibration of the attenuator is realized.

2. A programmable radio frequency network device according to claim 1, wherein: and the radio frequency input ports CAL5 and CAL3 are respectively connected into the communication equipment to be tested and the comprehensive tester, the T3 and T4 radio frequency switches are respectively controlled to be closed downwards by the external processing unit, and the T6 radio frequency switch is closed upwards, so that the sensitivity, the squelch sensitivity, the transmitting power and the modulating capability of the communication equipment to be tested are tested.

3. A programmable radio frequency network device according to claim 1, wherein: and the radio frequency input ports CAL5, CAL3 and CAL4 are respectively connected into the communication equipment to be tested, the comprehensive tester and the qualified signal source, the T1 radio frequency switch and the T2 radio frequency switch are respectively controlled to be closed downwards by the external processing unit, and the T3 radio frequency switch and the T4 radio frequency switch are closed upwards, so that the parasitic response of the communication equipment to be tested, the sensitivity reduction anti-interference performance and the cross modulation anti-interference performance are tested.

4. A programmable radio frequency network device according to claim 1, wherein: and the radio frequency input ports CAL5 and CAL2 are respectively connected into the communication equipment to be tested and the frequency spectrograph, the T5 and T6 radio frequency switches are respectively controlled to be closed downwards by an external processing unit, the output signal amplitude of the frequency spectrograph is measured, and the harmonic emission and clutter emission test of the communication equipment to be tested is realized.

5. A programmable radio frequency network device according to claim 1, wherein: each single-pole double-throw switch is connected with an external processing unit through an RS232 interface.

6. A programmable radio frequency network device according to claim 1, wherein: a power switch and an indicator light are arranged on the shell.

7. A programmable radio frequency network device according to claim 1, wherein: a 12V direct current power interface is arranged on the shell.