CN110611541A - Wireless Transceiver Test Methods - Google Patents

Abstract

The present invention provides a wireless transceiver testing method, which is suitable for testing a wireless transceiver, and the method includes the following steps: electrically connecting a standard sample of the wireless transceiver to a first testing machine. Electrically connecting a test object of the wireless transceiver to a second testing machine. The standard sample switches to a receiving mode and determines whether a first packet from the test object is received. When the first packet is received, the standard sample switches to a transmitting mode to send a second packet to the test object. The test object determines whether the second packet is received. When the test object determines that the second packet is received, the second testing machine determines whether the test object is normal based on the reception result of the test object.

Description

Wireless Transceiver Test Methods

technical field

The invention relates to electronic device testing, in particular to a wireless transceiver testing method.

Background technique

Wireless transceivers are widely used in wireless communication technology and have become an indispensable technology product in many people's lives. For example, cell phones, tablets, Bluetooth headsets and even some watches all have wireless transceivers.

Before leaving the factory, electronic products need to go through a standardized testing process to ensure that the quality of the delivered electronic products meets the standard. However, the testing process for wireless transceivers is known. One is to test the antenna and the baseband circuit separately, and the other is to analyze the field shape and frequency spectrum of the entire wireless transceiver for sending and receiving signals. Usually, both are tested. However, when field shape and spectrum analysis are involved, a spectrum analysis instrument is required, and the test operation is cumbersome. All these reasons will greatly increase the production cost of wireless transceiver manufacturers.

Contents of the invention

A wireless transceiver test method is provided, which reduces the use of a spectrum analyzer or even does not require a spectrum analyzer, so as to reduce the cost of the test process in the production process.

In an embodiment of the present invention, a wireless transceiver testing method is suitable for testing a wireless transceiver, and the method includes the following steps: electrically connecting a standard sample of the wireless transceiver to a first testing machine. The object under test of the wireless transceiver is electrically connected to the second test machine. The standard sample is switched to receive mode, and it is judged whether the first packet from the DUT is received. When receiving the first packet, the standard sample is switched to transmit mode to send the second packet to the DUT. The DUT judges whether to receive the second packet. When the object under test determines to receive the second packet, the second testing machine judges whether the object under test is normal according to the receiving result of the object under test.

In an embodiment of the present invention, the wireless transceiver testing method further includes determining whether the at least one DUT is normal according to a received signal strength indication related to the receiving result.

In an embodiment of the present invention, when the first packet is not received, the standard sample remains in the receiving mode.

In one embodiment of the present invention, before the standard sample is switched to a receiving mode, the at least one DUT is switched to the transmitting mode to transmit the first packet, and the at least one DUT is transmitting the first packet. Switch to the receiving mode after one packet to execute the step of judging whether to receive the second packet.

In an embodiment of the present invention, when the at least one DUT determines that the second packet is not received within a preset time, the at least one DUT switches to the transmitting mode to transmit the first packet.

In an embodiment of the present invention, the preset time is less than or equal to 2 seconds.

In an embodiment of the present invention, the first packet includes a Media Access Control address (MAC address) of the at least one DUT.

In an embodiment of the present invention, the at least one DUT is a plurality of DUTs, and the second test machine calculates the number of DUTs according to the receiving result and the MAC address corresponding to each DUT. A yield rate of the DUT.

In an embodiment of the present invention, when the receiving result indicates that the format of the second packet is correct, it is determined that the at least one DUT is normal.

In an embodiment of the present invention, when the receiving result indicates that the format of the second packet is incorrect, it is determined that the at least one DUT is abnormal.

To sum up, according to the wireless transceiver testing method of the present invention, the standard sample is used to directly transmit and receive wireless signals with the object under test. And according to the results of signal transmission and reception, it is judged whether the DUT is normal or not. Reduce the complexity and cost of the wireless transceiver test process.

Description of drawings

FIG. 1 is a schematic diagram of an operating environment of a wireless transceiver testing method in an embodiment of the present invention.

FIG. 2 is a schematic diagram of an operating environment for testing with a standard sample in an embodiment of the present invention.

Fig. 3 is a flow chart of the control method of the standard sample in the testing process.

Fig. 4 is a flow chart of the control method of the object under test in the testing process.

FIG. 5 is a flowchart illustrating how to determine whether the test object is normal in step 407 .

Explanation of main component symbols

Shielded room 1000 antenna 2100～2600 Test machine 3100, 3200 standard sample GS1, GS2 Analyte DUT1～DUT5

Detailed ways

The following specific embodiments will further illustrate the present invention in conjunction with the above-mentioned drawings.

Please refer to FIG. 1 , which is a schematic diagram of an operating environment of a wireless transceiver testing method in an embodiment of the present invention. As shown in Figure 1, a shielded room 1000 is provided with a plurality of antennas 2100-2600, wherein the antenna 2100 is used to electrically connect with the standard sample (golden sample) GS1, and the antennas 2200-2600 are used to communicate with the object under test. electrically connected. There are also a first test machine 3100 and a second test machine 3200 in the test environment. In one embodiment, the manufacturer of the wireless transceiver initially obtains the standard sample GS1 and the standard sample GS2. The manufacturer can first electrically connect the standard sample GS1 to the antenna 2100 and the first testing machine 3100 , and electrically connect the standard sample GS2 to the antenna 2200 and the second testing machine 3200 respectively, as shown in FIG. 2 . In this way, the manufacturer can confirm whether the operation of the standard sample GS1 and the standard sample GS2 is normal, and obtain the standard parameters for testing the standard samples in the shielded room 1000 . In one embodiment, the first test machine 3100 and the second test machine 3200 are, for example, general personal computers, but they may also be industrial computers or other computing devices with calculation, data processing and control capabilities. The wireless transceiver mentioned in the present invention is, for example, a long-distance wide area network (long rangewide area network, LoRaWAN) wireless transceiver, a Bluetooth (Bluetooth) wireless transceiver, or a low-power Bluetooth (Bluetooth Low Energy, BLE) wireless transceiver. transceiver.

Specifically, in the embodiment of FIG. 2 , the manufacturer uses two standard samples to confirm that the settings of the testing machine and the antenna are correct. Because if one of the standard sample GS1 and the standard sample GS1 cannot send and receive wireless signals correctly, it means that there is a link setting error in the entire test environment. Because the standard sample usually refers to the wireless transceiver that the manufacturer has previously verified that the parameters meet the standard and can work normally.

Next, when the manufacturer completes the production of the wireless transceivers, the DUTs DUT1 - DUT5 are obtained. At this time, the manufacturer puts the DUT1-DUT5 in the shielding room, and each DUT is electrically connected to the corresponding antenna and electrically connected to the second testing machine 3200 . Specifically, the DUT1 is electrically connected to the antenna 2200, the DUT2 is electrically connected to the antenna 2300, the DUT3 is electrically connected to the antenna 2400, the DUT4 is electrically connected to the antenna 2400, and the DUT5 is electrically connected to the antenna 2400. Sexually connect the antenna 2600.

Entering the testing process, the following is an example of testing the DUT1, but those skilled in the art should be able to infer the testing process for multiple DUTs. Please refer to FIG. 3 and FIG. 4 at the same time, wherein FIG. 3 is a flow chart of the control method of the standard sample GS1 in the test process, and FIG. 4 is a flow chart of the control method of the DUT1 in the test process. As shown in step 301 , the first testing machine 3100 controls the standard sample GS1 to switch to the receiving mode, and then as shown in step 303 , the standard sample GS1 determines whether the first packet from the DUT DUT1 is received. If the standard sample GS1 has not received the first packet, return to step 301, in other words, before the standard sample GS1 has not received the first packet, the standard sample GS1 remains in the receiving mode. When receiving the first packet, as shown in step 305 , the standard sample GS1 switches to the transmission mode, and as shown in step 307 , the standard sample GS1 sends the second packet to the DUT1.

On the other hand, the operation of the DUT is as follows. In step 401 , the DUT1 packs its own Media Access Control address (MAC address) into a first packet and transmits the first packet through the antenna 2200 . Then, as shown in step 403 , the DUT1 switches to the receiving mode. Then, as shown in step 405 , the DUT1 judges whether to receive the second packet.

In one embodiment, the DUT1 determines whether the second packet is not received within a time interval, such as 0.5 seconds, and returns to step 401 . In another embodiment, after the DUT1 determines that the second packet has not been received, it waits for a period of time, such as 0.5 seconds, and then returns to step 401 . When the DUT1 determines that the second packet is received, as shown in step 407 , the second testing machine 3200 judges whether the DUT1 is normal according to the receiving result of the DUT1 . In one embodiment, the aforementioned time interval is, for example, less than or equal to or less than 2 seconds. In another embodiment, when the DUT1 repeats multiple cycles and determines that the second packet is not received, the DUT1 generates an error report. Specifically, if the DUT1 has not been able to receive the second packet, it may be that the first packet has not been correctly received by the standard sample GS1, or there is a problem with the ability of the DUT1 to receive signals. In this way, when the second testing machine 3200 receives the error report of the DUT1 under test, it is determined that the DUT1 under test is abnormal.

In one embodiment, in step 401, the first packet includes transmit power information. When the standard sample GS1 receives the first packet, the standard sample GS1 calculates a Received Signal Strength Indication (RSSI) according to the transmit power of the first packet and the received power calculated when receiving the first packet. In the field of wireless communication, the RSSI is generally used to deduce the distance between two antennas (two wireless transceivers). However, in this embodiment, since the distance between the antenna 2100 and the antenna 2200 is a known fixed value (preset distance). The preset distance corresponds to a default received signal strength indication (Predetermined Received Signal Strength Indication, PRSSI). For example, the default received signal strength indicator may be one of the standard parameters previously obtained when the standard sample GS1 and the standard sample GS2 transmit and receive signals through the antenna 2100 and the antenna 2200 . The standard sample GS1 embeds the calculated received signal strength indication into the second packet.

Please refer to FIG. 5 , which is a flowchart illustrating how the second testing machine determines whether the DUT1 is normal in step 407 . As shown in step 501, the DUT1 parses the second packet. As mentioned above, the second packet includes the received signal strength indicator calculated by the standard sample GS1. As shown in step 503 , the DUT determines whether the RSSI included in the second packet meets the standard compared with the default RSSI. Specifically, according to the industry standard, when the received signal strength indicator included in the second packet is 3 decibels smaller than the default received signal strength indicator, it is judged that the signal transmission capability of the DUT1 does not meet the requirements. standard. Similarly, when the standard sample GS1 transmits the second packet through the antenna 2100, it can also embed the transmission power information in the second packet, and then the DUT1 under test is based on the signal strength when receiving the second packet and the information embedded in the second packet. The transmitted power of the second packet is calculated as another received signal strength indicator. The received signal strength indicator calculated here is related to the signal receiving capability of the DUT1.

In one embodiment, the DUT1 further determines whether the format of the received packet is correct. Specifically, since DUT1 is the base frequency circuit of the entire wireless transceiver, if the processed packet format is wrong, it often means that the wireless transceiver is in the mixer (mixer) or local oscillator (LO) circuit. have flaws.

In one embodiment, when it is judged that the received signal strength indicator does not meet the standard or the packet format is incorrect, the DUT1 generates an error report; otherwise, the DUT1 generates a pass report. Then, as shown in step 505 , the DUT1 transmits the generated report (error report or qualified report) and the MAC address to the second testing machine 3200 . Therefore, the second testing machine 3200 can determine whether the DUT1 is normal or abnormal according to the report sent by the DUT1. And specifically, when the DUT1-DUT5 in the test program are all tested, the second test machine 3200 will collect a plurality of different reports, and each report corresponds to a MAC address. Therefore, the second testing machine 3200 can calculate the yield rate of the DUTs DUT1 - DUT5 according to these data.

To sum up, according to the wireless transceiver testing method disclosed in the present invention, whether the object under test is abnormal is judged by whether the packet is received, whether the format of the packet is correct, or whether the received signal strength indicator meets the standard. It avoids the complicated procedure of using a spectrum analyzer and conducting field shape analysis, and reduces the probability of errors caused by human operation. At the same time, since no spectrum analyzer is needed in this program, the producer (manufacturer) does not need to purchase a large number of spectrum analyzers, which reduces the production cost.

Claims (10)

1. a wireless transceiver testing method, is suitable for testing a kind of wireless transceiver, is characterized in that: described wireless transceiver testing method comprises the following steps: electrically connecting a standard sample of the wireless transceiver to a first testing machine; Electrically connecting at least one DUT of the wireless transceiver to a second testing machine; The standard sample is switched to a receiving mode, and it is judged whether a first packet from the at least one analyte is received; When receiving the first packet, the standard sample is switched to a transmission mode to send a second packet to the at least one analyte; The at least one DUT determines whether to receive the second packet; and When the at least one DUT determines to receive the second packet, the second testing machine judges whether the at least one DUT is normal according to at least one receiving result of the at least one DUT. 2 . The wireless transceiver testing method according to claim 1 , further comprising: judging whether the at least one DUT is normal according to a received signal strength indication related to the receiving result. 3 . 3. The wireless transceiver testing method according to claim 1, wherein when the first packet is not received, the standard sample remains in the receiving mode. 4. The wireless transceiver testing method according to claim 1, further comprising switching the at least one DUT to the transmitting mode to transmit the first packet before the standard sample is switched to a receiving mode, and the At least one DUT switches to the receiving mode after transmitting the first packet to execute the step of judging whether to receive the second packet. 5. The wireless transceiver testing method according to claim 4, wherein: when the at least one DUT determines that the second packet has not been received within a preset time, the at least one DUT switches to the transmitting mode to transmit the first packet. 6. The wireless transceiver testing method according to claim 5, wherein the preset time is less than or equal to 2 seconds. 7. The wireless transceiver testing method according to any one of claims 1 to 5, characterized in that: the first packet includes a media access control address (Media Access Control address, MAC address) of the at least one DUT . 8. The wireless transceiver testing method according to claim 7, characterized in that: the at least one DUT is a plurality of DUTs, and the second testing machine is based on the receiving result corresponding to each DUT and The MAC address calculates a yield rate of the DUTs. 9. The wireless transceiver testing method according to claim 1, wherein when the receiving result indicates that the format of the second packet is correct, it is determined that the at least one DUT is normal. 10. The wireless transceiver testing method according to claim 1 or 9, wherein when the receiving result indicates that the format of the second packet is incorrect, it is determined that the at least one DUT is abnormal.