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This article will explain in detail how to use MT8852B to test low-power Bluetooth. The content of the article is of high quality, so the editor shares it for you as a reference. I hope you will have some understanding of the relevant knowledge after reading this article.

Bluetooth tester MT8852B is a market-leading RF testing instrument, which is mainly used for design verification and production testing of all kinds of products integrated with Bluetooth technology. Supports the transmission power, frequency, modulation and receiver sensitivity required by Bluetooth basic rate (BR), enhanced data rate (EDR) and Bluetooth low Power consumption (BLE) RF test specifications. In production, a simple keystroke starts a test script that can test a device in less than 10 seconds. MT8852B currently supports the latest Bluetooth ®standard V5.1 (AoA/AoD). What I share with you today is how to connect the instrument and the object to be tested by using the BLE test software of Anli original factory.

First of all, MT8852B needs the built-in option 027, namely Low energy. How to confirm whether your instrument supports it can be confirmed by the [Config] button-> [System features]-- > [Feature contorl] of the instrument panel. If the built-in BLE option screen will be displayed as follows:

Now that you have confirmed the hardware support, you need to install the Anli Bluetooth low energy Measurement Software test software on the control computer at the following download address:

Https://www.anritsu.com/zh-CN/test-measurement/support/downloads/software/dwl008210

Next, use a GPIB-USB-HS of NI to connect the MT8852B to the control computer. The driver of NI 488.2 should be installed on the computer. The specific download address is as follows:

Https://www.baidu.com/link?url=RRrCTYLdWJSlVW7nfAInEeG8F-_xpWRaL8z6SzwY6Oh0nf_yqWAdXR6ASLwL7CosIL_xLY_022qX5ekUunaPxz1O0SxGeLA8Fq8NJsYVtv88O2DBc-8XjUEc--X3rnhE&wd=&eqid=d5a39fee000442ab000000045edf271b

The schematic diagram of the connection between MT8852B and DUT and the control computer is as follows:

After the "Bluetooth low energy Measurement Software" test software is successfully installed on the computer, the following icon will appear on the desktop:

Double-click to open the control interface of the software:

Click [Connect] on the left to let the software identify the MT8852B through GPIB. Here, the default GPIB address of MT8852B is usually 27, which usually does not need to be changed, but there are always surprises, so the way to view the GPIB address is as follows: click [Config]-> [MT8852B]-- > [System interface]

After successful reading, the software will recognize the basic information of the instrument and the previously mentioned installed BLE option.

Select the control mode of the tested object and the speed of RS232 line

Launch test

When entering the Tx Testing screen, the Tx test option allows the measurement of the power, frequency and modulation-related parameters of the DUT's low-energy packets.

In the [Frequency] drop-down display, select the frequency of the data, in the [EUT Tx power] drop-down field, select the power level range for data transmission, and in the [Trigger] drop-down input field, select the trigger mechanism.

[Internal RF] trigger the rising edge of the EUT power pulse. The type of trigger should be set to [Internal RF] to achieve stable packet capture and obtain measurement results. If you select [External BNC Input] or [Free Run], a frequency deviation occurs.

Set the synchronization word [Sync Word] to match the synchronization word of the packet under test. If the synchronization word is not set correctly, the software will not be able to decode the packet and display traces or measurement results. Then select the appropriate encoding type and byte length under [Payload]. The encoding type must be set to 10101010 to perform carrier and drift measurements. If the encoding type is set to PRBS9, the modulation measurement is not available.

Next, check the Tx test project you need to do, as shown in the following figure, and click [Tx Test] to tell the instrument that it is in Tx measurement mode.

Click run once or run continuously to grab the data.

You can zoom the tracking by dragging the mouse over the desired area, such as the waveform display in the image above. Right-click tracking and select [Original Scale] to set the display back to the original scale. The right-click pop-up menu also allows you to print and save the image, or to display sample points on the trace.

Receiving test

If the above connection remains unchanged, click [Rx Testing] on the software page.

Select the frequency at which the data is transmitted to DUT in the [Frequency] drop-down field. Select the data in the [Power Level] drop-down field to transfer the data to DUT at the power level range. At the same time, select the appropriate coding type and length.

Set the synchronization word [Sync Word] the synchronization word defined for the reference package is 71764129. The synchronization word should be set to meet the requirements of DUT. Set spacing [Spacing] the interval setting defines the number of microseconds between the beginning of consecutive packets. [Packets] sets the Bluetooth low energy data rate.

Click run once or run continuously to grab the data.

Click [Test End] to end the test and view the test results. (there is no product in the picture below)

The following is a picture of the actual test.

Because the product needs power supply, an external power supply is connected.

As there are many options and collocation methods for MT8852B, many people usually do not understand it, so I have made a form attached before, hoping to be helpful.

On how to use MT8852B to test low-power Bluetooth to share here, I hope the above content can be of some help to you, can learn more knowledge. If you think the article is good, you can share it for more people to see.

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