CN116887334A - Distributed test system and test method for indoor signals of wireless communication - Google Patents

Abstract

The invention discloses a distributed test system and a test method for indoor signals of wireless communication, wherein the test system comprises at least one group of communication base stations, a POI platform, a first coupler, a first bidirectional amplifier, a first power divider, a second power divider, a front multi-frequency branching/combining device, a rear multi-frequency branching/combining device, a second coupler, a third power divider, a combining device, a fourth power divider and a fifth power divider which are connected in series. The POI platform establishes signal connection with the communication base station. The invention can test standing wave characteristics of each access node, output power of active equipment, port power of an antenna radiation source point, uplink and downlink balance of a system, isolation test of each system input port of an indoor distribution system, light path loss and time delay, interference coverage level test of each empty area of the indoor distribution system, coverage uniformity of each area of the indoor distribution system, coverage effect test under the condition of simulated loading and leakage level test under the condition of simulated loading, and has strong functionality.

Description

Distributed test system and test method for indoor signals of wireless communication

Technical Field

The invention relates to a signal testing system, in particular to a distributed testing system and a testing method for indoor signals of wireless communication.

Background

For the current demand of users on data service, the indoor network coverage effect is important to the network experience of end users, and for engineering companies, the user satisfaction is improved by building indoor distribution, new service is expanded, and the user experience is improved. The construction of indoor distribution system is the work of engineering company in 5G network age.

How to enable an indoor distribution system to quickly locate blind areas, hot spots and interference, and the problems of indoor distribution are strictly taken care of and furthest warned and solved when indoor distribution is required to be checked and accepted.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a distributed test system and a test method for wireless communication indoor signals, and the distributed test system is designed to improve the test accuracy and solve the indoor division problem.

In order to solve the technical problems, the invention is realized by the following scheme: the invention discloses a distributed test system for wireless communication indoor signals, which comprises the following components:

at least one group of communication base stations;

the POI platform is in signal connection with the communication base station;

the first end of the first coupler is connected with the first signal output end of the POI platform;

a first bi-directional amplifier having a first end connected to a second end of the first coupler;

a first power divider connected with an antenna;

the second power divider is connected with the first power divider in series, and is connected with at least one antenna;

the signal input end of the prepositive multi-frequency branching/combining device is connected with the third end of the first coupler;

a post-multi-frequency branching/combining device, which is connected with the pre-multi-frequency branching/combining device through a plurality of second bidirectional amplifiers;

one end of the second coupler and one end of the third coupler which are connected in series are connected to the signal output end of the rear multi-frequency shunt/combiner, and the second coupler and the third coupler are respectively and independently connected with an antenna;

the third power divider is connected with the second coupler and the other end of the third coupler after being connected in series, and is connected with at least one antenna;

the two pins of the signal input end are respectively connected with the second signal output end of the POI platform and the signal output end of the terminal communication base station;

the power divider comprises a fourth power divider and a fifth power divider which are connected in series, wherein the signal output end of the fourth power divider is connected with the signal output end of the combiner, the fourth power divider is connected with an antenna, and the fifth power divider is connected with at least one antenna.

The invention relates to a testing method of a distributed testing system of wireless communication indoor signals, which comprises an active equipment online testing method, wherein the active equipment online testing method comprises the following steps:

step one, a signal source is connected to the input end of a base station of an indoor distribution system;

step two, a spectrometer or a power meter is connected to the output end of the downlink of the amplifier;

step three, setting a signal source to a working frequency band of a specified system, and increasing the signal level of the signal source;

setting a spectrometer to a specified standard working frequency band, and observing the change of the spectrometer while increasing the information source level;

fifthly, when the input signal level is increased and the signal level of the spectrometer is basically unchanged, recording the level value of the TSP transmitter as ALC starting control power at the moment;

step six, when the input signal level is continuously increased, recording the level value of the transmitter as the maximum signal input level of the active amplifier when the signal level of the spectrometer is increased from the unchanged state to the starting state;

step seven, when the record is in the normal working range, the difference value between the spectrometer and the TSP transmitter is the downlink gain;

step eight, the positions of a spectrometer and a TSP transmitter are exchanged, the TSP transmitter is connected to an uplink input port of an amplifier, and the spectrometer or a power meter is connected to a base station receiving port of an uplink;

step nine, carrying out the operation again, and recording ALC starting control power, maximum signal input level and uplink gain at the moment;

and step ten, comparing the uplink and downlink gains, and calculating a difference value.

The testing method also comprises a system uplink and downlink balance testing method, and the system uplink and downlink balance testing method comprises the following steps:

step one, a signal source is sent to an information source input end of a base station of a room division signal distribution system, and a spectrometer is connected to a downlink far-end antenna end;

opening a chamber-division link control module on a signal source and a frequency spectrograph, performing calibration operation, clicking to start testing after the calibration is completed, and waiting for sweep frequency to obtain test data to obtain a downlink transmission loss value;

step three, the signal source is exchanged with the frequency spectrograph, and the steps are repeated to obtain an uplink transmission loss value, wherein the difference value of the uplink loss and the downlink loss is the imbalance of the uplink and the downlink;

the testing method also comprises a system isolation testing method, and the system isolation testing method comprises the following steps:

step one, a signal source is sent to a signal source input end of a base station of a room division signal distribution system;

step two, connecting the spectrometer to a same-system uplink output port or other-system transmitting port or receiving port of the base station side of the indoor subsystem;

generating a CW single carrier signal of OdBm by a signal source, and setting the CW single carrier signal in an actual working frequency range of an indoor distribution system to sweep at 1MHz bandwidth intervals;

fourthly, setting the spectrometer in the scanning frequency band range of the signal source, and testing by adopting a maximum maintained testing state by using an rms detection mode;

step five, reading the value of the input level on the signal source and the value of the output level on the spectrometer, and calculating the isolation of the system;

step six, when the signal source and the spectrometer are at the receiving and transmitting end of the same system, the test data is the receiving and transmitting isolation in the system;

step seven, when the spectrometer is positioned at the receiving port of other systems, the test data is the blocking isolation between the systems;

step eight, when the spectrometer is positioned at the transmitting port of other systems, the test data is inter-system intermodulation isolation;

and step nine, when the spectrometer is positioned at a receiving port of other systems, and the signal source sends out-of-band working frequency bands, the test data is the inter-system scattered isolation.

The testing method also comprises a testing method for the interference function of the coverage area before the indoor signal distribution system is opened, and the testing method for the interference function of the coverage area before the indoor signal distribution system is opened comprises the following steps:

step one, determining a sampling test route according to a drawing;

step two, using a TSP sweep generator to blindly search out frequency point distribution conditions of the base stations of different systems outdoors in the working frequency band of the indoor subsystem;

and thirdly, carrying out indoor coverage frequency point signal intensity sweep test along a drive test route by using a TSP sweep generator, storing a drive test diagram, and storing frequency point information, signal intensity, cell information and signal-to-interference ratio data.

The test method also comprises an analog loading coverage signal field intensity test method, and the analog loading coverage signal field intensity test method comprises the following test steps:

step one, determining a sampling test route according to a drawing;

step two, sending the modulated signal source into a downlink input port of a base station side of the indoor subsystem, wherein the analog signal source equipment can select a TSP transmitter or a signal source according to the power requirement;

step three, after determining indoor coverage signal frequency points, guiding a prepared route map into a spectrometer;

step four, starting the position to start indoor coverage frequency point test along the route, and synchronously performing dotting test by clicking the corresponding position of the screen;

step five, the testing of different systems needs to repeat the steps, or a plurality of analog signal sources with different systems are used;

step six, storing test data, generating a test route map, and counting the field intensity occupation ratio specified in the coverage area.

The test method also comprises an analog loading outdoor leakage signal field intensity test method, and the analog loading outdoor leakage signal field intensity test method comprises the following test steps:

step one, determining a sampling test route according to a drawing;

step two, sending the modulated signal source into a downlink input port of a base station side of the indoor subsystem, wherein the analog signal source equipment can select a TSP transmitter or a signal source according to the power requirement;

step three, after determining indoor coverage signal frequency points, guiding a prepared route map into a spectrometer;

step four, starting the position to start indoor coverage frequency point test along the route, and synchronously performing dotting test by clicking the corresponding position of the screen;

step five, the testing of different systems needs to repeat the steps, or a plurality of analog signal sources with different systems are used;

step six, storing test data, generating a test route map, and counting the field intensity occupation ratio specified in the coverage area.

Compared with the prior art, the invention has the beneficial effects that:

1. the distributed test system for the wireless communication indoor signals can test standing wave characteristics of all access nodes, output power of active equipment, port power of an antenna radiation source point, uplink and downlink balance of a system, isolation test of all system input ports of the indoor distribution system, light path loss and time delay, interference coverage level test of all empty areas of the indoor distribution system, coverage uniformity of all areas of the indoor distribution system, coverage effect test under simulated loading and leakage level test under simulated loading, and has strong functionality.

2. The testing method of the distributed testing system for the indoor signals of the wireless communication can improve testing efficiency and testing accuracy.

Drawings

Fig. 1 is a schematic block diagram of a distributed test system for wireless communication indoor signals according to the present invention.

Fig. 2 is a schematic diagram of indoor coverage effect and transmission quality test according to the present invention.

Fig. 3 is a schematic diagram of an active device online test connection according to the present invention.

Fig. 4 is a schematic diagram of a system for testing the balance of uplink and downlink according to the present invention.

FIG. 5 is a schematic diagram illustrating a transmit-receive isolation test in the system of the present invention.

FIG. 6 is a schematic diagram of an intersystem block isolation test according to the present invention.

FIG. 7 is a schematic diagram illustrating an inter-system intermodulation isolation test according to the present invention.

FIG. 8 is a graph of intersystem noise isolation according to the present invention: the signal source sends out an out-of-band operating band diagram.

FIG. 9 is a schematic diagram of an analog loading coverage signal field strength test of the present invention.

The reference numerals in the drawings: the communication base station 1, the POI platform 2, the antenna 6, the pre-multi-frequency splitter/combiner 7, the post-multi-frequency splitter/combiner 9, the combiner 11, the TSP transmitter 12, the spectrometer 13, the signal source 14, the first coupler 31, the second coupler 32, the third coupler 33, the first bidirectional amplifier 41, the second bidirectional amplifier 42, the second power divider 51, the third power divider 52, the fifth power divider 53, the fourth power divider 54, and the first power divider 55.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described in the following with reference to the drawings in the embodiments of the present invention, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, and thus the protection scope of the present invention is more clearly and clearly defined. It should be apparent that the described embodiments of the invention are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

In addition, the technical features of the different embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.

Example 1: the specific structure of the invention is as follows:

referring to fig. 1-2, fig. 1 is a schematic block diagram of a distributed test system for indoor signals in wireless communication according to the present invention, and nodes a to J in fig. 1 are test points.

The invention discloses a distributed test system for wireless communication indoor signals, which comprises the following components:

at least one group of communication base stations 1;

the POI platform 2 is in signal connection with the communication base station 1;

a first coupler 31, the first end of which is connected with the first signal output end of the POI platform 2;

a first bi-directional amplifier 41 having a first end connected to the second end of the first coupler 31;

a first power divider 55, the first power divider 55 being connected to the antenna 6;

a second power divider 51, the second power divider 51 being connected in series with the first power divider 55, the second power divider 51 being connected to at least one antenna 6;

a front-end multi-frequency branching/combining device 7, wherein a signal input end of the front-end multi-frequency branching/combining device 7 is connected with a third end of the first coupler 31;

a post-multi-frequency splitter/combiner 9 having a plurality of second bidirectional amplifiers 42 connected to the pre-multi-frequency splitter/combiner 7;

the second coupler 32 and the third coupler 33, one end of the second coupler 32 and one end of the third coupler 33 after being connected in series are connected to the signal output end of the rear multi-frequency shunt/combiner 9, and the second coupler 32 and the third coupler 33 are respectively and independently connected with the antenna 6;

a third power divider 52 connected to the other end of the second coupler 32 and the third coupler 33 after being connected in series, wherein the third power divider 52 is connected to at least one antenna 6;

the combiner 11, two feet of the signal input end are connected with the second signal output end of the POI platform 2 and the signal output end of the terminal communication base station respectively;

the signal output end of the fourth power divider 54 is connected with the signal output end of the combiner 11, the fourth power divider 54 is connected with the antenna 6, and the fifth power divider 53 is connected with at least one antenna 6.

Example 2:

as shown in fig. 3, a test method of a distributed test system for a wireless communication indoor signal according to the present invention includes an active device on-line test method that requires the use of a TSP transmitter, a spectrometer 13, and a power meter. The testing conditions of the active equipment online testing method are as follows: the indoor distribution system is in a working state, all end nodes of the indoor signal distribution system to be tested cannot be unloaded, an antenna or a standard load is connected, a test path comprises active equipment, and the power supply of the active equipment is required to be turned off before the test.

The active equipment online testing method comprises the following steps:

step one, a signal source 14 is connected to the input end of a base station of an indoor distribution system;

step two, the spectrometer 13 or the power meter is connected to the output end of the down link of the amplifier;

step three, setting a signal source 14 to a working frequency band of a specified system, and increasing the signal level of the signal source;

step four, setting a spectrometer 13 to a specified standard working frequency band, and observing the change of the spectrometer while increasing the information source level;

fifthly, when the input signal level is increased and the signal level of the spectrometer is basically unchanged, recording the level value of the TSP transmitter 12 as ALC start control power at the moment;

step six, when the input signal level is continuously increased, recording the level value of the transmitter as the maximum signal input level of the active amplifier when the signal level of the spectrometer is increased from the unchanged state to the starting state;

step seven, when the record is in the normal working range, the difference value between the spectrometer 13 and the TSP transmitter 12 is the downlink gain;

step eight, the positions of the frequency spectrograph 13 and the TSP transmitter 12 are exchanged, the TSP transmitter 12 is connected to an uplink input port of an amplifier, and the frequency spectrograph 13 or a power meter is connected to a base station receiving port of an uplink;

step nine, carrying out the operation again, and recording ALC starting control power, maximum signal input level and uplink gain at the moment;

and step ten, comparing the uplink and downlink gains, and calculating a difference value.

Example 3:

as shown in fig. 4, fig. 4 is a schematic diagram illustrating an uplink and downlink balance test of the system according to the present invention. The test method also comprises a system uplink and downlink balance test method, and test equipment required by the system uplink and downlink balance test method comprises a signal source 14, a spectrometer 13 and an attenuator. The test conditions of the system uplink and downlink balance test method are as follows: the indoor distribution system is in a working state; all end nodes of the indoor signal distribution system to be tested cannot be unloaded, and are connected with an antenna or a standard load; test paths such as those containing active devices; the power supply of the active equipment is turned on before the test; respectively taking near, middle and far end antennas according to the indoor signal feeding paths to connect the node test antenna ports, wherein the extracted test points should be evenly dispersed in different indoor scenes and floors; the path loss of the downlink and uplink are tested separately.

The system uplink and downlink balance test method comprises the following steps:

step one, a signal source 14 is sent into an information source input end of a base station of a room division signal distribution system, and a spectrometer 13 is connected into a downlink far-end antenna end;

opening a chamber-division link control module on a signal source 14 and a frequency spectrograph 13, performing calibration operation, clicking to start testing after the calibration is completed, and waiting for sweep frequency to obtain test data to obtain a downlink transmission loss value;

step three, the signal source 14 is exchanged with the frequency spectrograph 13, and the steps are repeated to obtain the uplink transmission loss value, and the difference value of the uplink loss and the downlink loss is the imbalance of the uplink and the downlink;

example 4:

as shown in fig. 5-8, fig. 5 is a schematic diagram of the inter-system transmit-receive isolation test of the present invention, fig. 6 is a schematic diagram of the inter-system blocking isolation test of the present invention, fig. 7 is a schematic diagram of the inter-system intermodulation isolation test of the present invention, and fig. 8 is a schematic diagram of the inter-system impurity isolation of the present invention: the signal source sends out an out-of-band operating band diagram.

The test method comprises a system isolation test method, and the instruments required by the system isolation test method comprise a signal source 14, a spectrometer 13 and an attenuator. The test conditions of the system isolation test method are as follows: the indoor distribution system is in a working state; all end nodes of the indoor signal distribution system to be tested cannot be unloaded, and are connected with an antenna or a standard load; if the test path contains active equipment, the active equipment power supply should be turned on before testing.

The system isolation testing method comprises the following steps:

step one, a signal source 14 is sent to an information source input end of a base station of the indoor signal distribution system;

step two, the spectrometer 13 is connected to the same-system uplink output port or other-system transmitting port or receiving port of the base station side of the indoor subsystem;

step three, the signal source 14 generates a CW single carrier signal of 0dBm and is arranged in the actual working frequency range of the indoor distribution system to sweep at 1MHz bandwidth intervals;

fourthly, the spectrometer 13 is arranged in the scanning frequency band range of the signal source 14, and the rms detection mode is used for testing by adopting the maximum maintained testing state;

fifthly, reading the value of the input level from the signal source 14 and the value of the output level from the spectrometer 13, and calculating the isolation of the system;

step six, when the signal source 14 and the spectrometer 13 are at the receiving and transmitting end of the same system, the test data is the receiving and transmitting isolation in the system;

step seven, when the spectrometer 13 is positioned at the receiving port of other systems, the test data is the blocking isolation between the systems;

step eight, when the spectrometer 13 is positioned at the transmitting port of other systems, the test data is inter-system intermodulation isolation;

and step nine, when the spectrometer 13 is positioned at the receiving port of other systems, and the signal source 14 sends out-of-band working frequency bands, the test data is the inter-system stray isolation.

Example 5:

the testing method further comprises a testing method of the interference function of the coverage area before the indoor signal distribution system is started, and an instrument required to be used by the testing method of the interference function of the coverage area before the indoor signal distribution system is started is a TSP sweep generator. The test conditions of the method for testing the interference function of the coverage area before the indoor signal distribution system is opened are as follows: testing a main coverage area, an edge area, a leakage area, a switching area and a driving area in a building; the indoor signal distribution system is turned off.

The method for testing the interference function of the coverage area before the indoor signal distribution system is opened comprises the following steps:

step one, determining a sampling test route according to a drawing;

step two, using a TSP sweep generator to blindly search out frequency point distribution conditions of the base stations of different systems outdoors in the working frequency band of the indoor subsystem;

and thirdly, carrying out indoor coverage frequency point signal intensity sweep test along a drive test route by using a TSP sweep generator, storing a drive test diagram, and storing frequency point information, signal intensity, cell information and signal-to-interference ratio data.

Example 6:

as shown in fig. 9, fig. 9 is a schematic diagram of the analog loading coverage signal field strength test of the present invention. The test method also includes an analog loaded overlay signal field strength test method that requires the use of instrumentation including a TSP transmitter or signal source 14, a spectrometer 13, and test software. The test conditions of the test method for simulating the field intensity of the loading coverage signal are as follows: the indoor distribution system is in a working state; all end nodes of the indoor signal distribution system to be tested cannot be unloaded, and are connected with an antenna or a standard load; if the test path contains active equipment, the power supply of the active equipment should be turned on before the test; when the indoor subsystem is in a coverage area with multi-cell configuration, a plurality of information source frequency bands are respectively arranged at the information source input and output ports of the specified cells; setting the signal source output power to a prescribed base station output level value; the main coverage area, edge area, leakage area and switching area and driving area in the building were tested.

The method for testing the field intensity of the analog loading coverage signal comprises the following testing steps:

step one, determining a sampling test route according to a drawing;

step two, sending the modulated signal source into a downlink input port of a base station side of the indoor subsystem, wherein the analog signal source equipment can select a TSP transmitter or a signal source 14 according to the power requirement;

step three, after the indoor coverage signal frequency points are determined, a roadmap prepared in advance is led into the spectrometer 13;

step four, starting the position to start indoor coverage frequency point test along the route, and synchronously performing dotting test by clicking the corresponding position of the screen;

step five, the testing of different systems needs to repeat the steps, or a plurality of analog signal sources with different systems are used;

step six, storing test data, generating a test route map, and counting the field intensity occupation ratio specified in the coverage area.

Example 7:

the test method also comprises an analog loading outdoor leakage signal field intensity test method, and the analog loading outdoor leakage signal field intensity test method comprises the following test steps:

step one, determining a sampling test route according to a drawing;

step two, sending the modulated signal source into a downlink input port of a base station side of the indoor subsystem, wherein the analog signal source equipment can select a TSP transmitter or a signal source 14 according to the power requirement;

step three, after the indoor coverage signal frequency points are determined, a roadmap prepared in advance is led into the spectrometer 13;

step four, starting the position to start indoor coverage frequency point test along the route, and synchronously performing dotting test by clicking the corresponding position of the screen;

step five, the testing of different systems needs to repeat the steps, or a plurality of analog signal sources with different systems are used;

step six, storing test data, generating a test route map, and counting the field intensity occupation ratio specified in the coverage area.

Example 8:

the testing method also comprises a standing-wave ratio testing method, and an instrument used by the standing-wave ratio testing method is an antenna feeder tester. The test conditions of the standing-wave ratio test method are as follows: all end nodes of the indoor signal distribution system to be tested cannot be unloaded, and are connected with an antenna or a standard load; if the test path contains active equipment, the power supply of the active equipment should be turned off before the test; test node selection: active equipment (base station, dry-laid) connection nodes, distributed system base station information source introduction nodes, trunk cables and branch cable jumper nodes, antenna radiation nodes and leakage cable terminal nodes.

The standing-wave ratio testing method comprises the following testing steps:

step one, preparing according to test description, numbering test points;

step two, performing calibration operation on SK6000 by using a calibration piece;

connecting the antenna feeder tester with a port of a corresponding test node;

and step four, reading and recording the standing wave ratio value of each node.

In summary, the distributed test system for wireless communication indoor signals can test standing wave characteristics of each access node, output power of active equipment, port power of an antenna radiation source point, uplink and downlink balance of the system, isolation test of input ports of each system of the indoor distribution system, light path loss and time delay, interference coverage level test of each empty area of the indoor distribution system, coverage uniformity of each area of the indoor distribution system, coverage effect test under simulated loading and leakage level test under simulated loading, and has strong functionality. The testing method of the distributed testing system for the indoor signals of the wireless communication can improve testing efficiency and testing accuracy.

The foregoing description is only of the preferred embodiments of the present invention and is not intended to limit the scope of the invention, and all equivalent structures or equivalent processes using the descriptions and the drawings of the present invention or directly or indirectly applied to other related technical fields are included in the scope of the invention.

Claims (7)

1. A distributed test system for wireless communication indoor signals, comprising:

at least one group of communication base stations (1);

the POI platform (2) is in signal connection with the communication base station (1);

a first coupler (31) with a first end connected to a first signal output end of the POI platform (2);

a first bi-directional amplifier (41) having a first end connected to a second end of the first coupler (31);

a first power divider (55), the first power divider (55) being connected to an antenna (6);

a second power divider (51), the second power divider (51) and the first power divider (55) are connected in series, and at least one antenna (6) is connected to the second power divider (51);

a front-end multi-frequency branching/combining device (7), wherein the signal input end of the front-end multi-frequency branching/combining device (7) is connected with the third end of the first coupler (31);

a rear multi-frequency branching/combining device (9) which is connected with a plurality of second bidirectional amplifiers (42) between the front multi-frequency branching/combining device (7);

the second coupler (32) and the third coupler (33), one end of the second coupler (32) and one end of the third coupler (33) which are connected in series are connected to the signal output end of the rear multi-frequency shunt/combiner (9), and the second coupler (32) and the third coupler (33) are respectively and independently connected with an antenna (6);

the third power divider (52) is connected with the other end of the second coupler (32) and the other end of the third coupler (33) after being connected in series, and the third power divider (52) is connected with at least one antenna (6);

the two pins of the signal input end are respectively connected with the second signal output end of the POI platform (2) and the signal output end of the tail end communication base station;

the power divider comprises a fourth power divider (54) and a fifth power divider (53) which are connected in series, wherein the signal output end of the fourth power divider (54) is connected with the signal output end of the combiner (11), the fourth power divider (54) is connected with an antenna (6), and the fifth power divider (53) is connected with at least one antenna (6).

2. The testing method of the distributed testing system of the indoor signal of the wireless communication is characterized by comprising an active equipment online testing method, wherein the active equipment online testing method comprises the following steps of:

step one, a signal source (14) is connected to the input end of an indoor distribution system base station;

step two, a spectrometer (13) or a power meter is connected to the output end of the downlink of the amplifier;

step three, setting a signal source (14) to a working frequency band of a specified system, and increasing the signal level of the signal source;

setting a spectrometer (13) to a specified standard working frequency band, and observing the change of the spectrometer while increasing the information source level;

fifthly, when the input signal level is increased and the signal level of the spectrometer is basically unchanged, recording the level value of the TSP transmitter (12) as ALC starting control power at the moment;

step six, when the input signal level is continuously increased, recording the level value of the transmitter as the maximum signal input level of the active amplifier when the signal level of the spectrometer is increased from the unchanged state to the starting state;

step seven, when the record is in the normal working range, the difference value between the spectrometer (13) and the TSP transmitter (12) is the downlink gain;

step eight, the positions of a spectrometer (13) and a TSP transmitter (12) are exchanged, the TSP transmitter (12) is connected to an uplink input port of an amplifier, and the spectrometer (13) or a power meter is connected to a base station receiving port of an uplink;

step nine, carrying out the operation again, and recording ALC starting control power, maximum signal input level and uplink gain at the moment;

and step ten, comparing the uplink and downlink gains, and calculating a difference value.

3. The method of testing according to claim 2, further comprising a system uplink and downlink balancing test method comprising the steps of:

step one, a signal source (14) is sent to an indoor signal distribution system base station signal source input end, and a spectrometer (13) is connected to a downlink far-end antenna end;

opening a room division link control module on a signal source (14) and a frequency spectrograph (13), performing calibration operation, clicking to start testing after the calibration is completed, and waiting for sweep frequency to obtain test data to obtain a downlink transmission loss value;

and thirdly, exchanging the signal source (14) with the frequency spectrograph (13), and repeating the steps to obtain an uplink transmission loss value, wherein the difference value of the uplink loss and the downlink loss is the imbalance of the uplink and the downlink.

4. The method of testing according to claim 2, further comprising a system isolation testing method comprising the steps of:

step one, a signal source (14) is sent to a signal source input end of a base station of a room division signal distribution system;

step two, the spectrometer (13) is connected to the same-system uplink output port or other-system transmitting port or receiving port of the base station side of the indoor subsystem;

step three, a signal source (14) generates a CW single carrier signal of OdBm and is arranged in the actual working frequency range of the indoor distribution system to sweep frequencies at 1MHz bandwidth intervals;

fourthly, the spectrometer (13) is arranged in the scanning frequency band range of the signal source (14), and the rms detection mode is used for testing by adopting the maximum maintained testing state;

fifthly, reading the value of the input level from the signal source (14) and the value of the output level from the spectrometer (13), and calculating the system isolation;

step six, when the signal source (14) and the frequency spectrograph (13) are positioned at the receiving and transmitting end of the same system, the test data is the receiving and transmitting isolation in the system;

step seven, when the spectrometer (13) is positioned at the receiving port of other systems, the test data is the blocking isolation between the systems;

step eight, when the spectrometer (13) is positioned at a transmitting port of other systems, testing data is inter-system intermodulation isolation;

and step nine, when the spectrometer (13) is positioned at a receiving port of other systems, and the signal source (14) transmits out-of-band working frequency bands, the test data is the intersystem scattered isolation.

5. The test method according to claim 2, further comprising a method for testing an interference function of a coverage area before an indoor signal distribution system is turned on, the method for testing the interference function of the coverage area before the indoor signal distribution system is turned on comprising the steps of:

step one, determining a sampling test route according to a drawing;

step two, using a TSP sweep generator to blindly search out frequency point distribution conditions of the base stations of different systems outdoors in the working frequency band of the indoor subsystem;

and thirdly, carrying out indoor coverage frequency point signal intensity sweep test along a drive test route by using a TSP sweep generator, storing a drive test diagram, and storing frequency point information, signal intensity, cell information and signal-to-interference ratio data.

6. The test method according to claim 2, further comprising an analog loading coverage signal field strength test method comprising the test steps of:

step one, determining a sampling test route according to a drawing;

step two, sending the modulation signal source into a downlink input port of a base station side of the indoor subsystem, wherein the analog signal source equipment can select a TSP transmitter or a signal source (14) according to the power requirement;

step three, after the indoor coverage signal frequency points are determined, a roadmap prepared in advance is led into a spectrometer (13);

step four, starting the position to start indoor coverage frequency point test along the route, and synchronously performing dotting test by clicking the corresponding position of the screen;

step five, the testing of different systems needs to repeat the steps, or a plurality of analog signal sources with different systems are used;

step six, storing test data, generating a test route map, and counting the field intensity occupation ratio specified in the coverage area.

7. The test method of claim 2, further comprising a simulated loading outdoor leakage signal field strength test method comprising the steps of:

step one, determining a sampling test route according to a drawing;

step two, sending the modulation signal source into a downlink input port of a base station side of the indoor subsystem, wherein the analog signal source equipment can select a TSP transmitter or a signal source (14) according to the power requirement;

step three, after the indoor coverage signal frequency points are determined, a roadmap prepared in advance is led into a spectrometer (13);

step four, starting the position to start indoor coverage frequency point test along the route, and synchronously performing dotting test by clicking the corresponding position of the screen;

step five, the testing of different systems needs to repeat the steps, or a plurality of analog signal sources with different systems are used;

step six, storing test data, generating a test route map, and counting the field intensity occupation ratio specified in the coverage area.