CC3235SF: Connecting to a CMW-500 for WLAN testing

Stephen Welch

Part Number: CC3235SF

I'd like to test out my CC3235SF RF performance with a Rohde & Schwarz CMW-500. Is there an example build I could load that is compatible with connecting to a CMW?

over 4 years ago

0 FI over 4 years ago

TI__Mastermind 20800 points

Hi,

We will look into this and get back to you.

Thanks

0 Seong Kim over 4 years ago

TI__Mastermind 41065 points

Stephen,

You can use RadioTool GUI and play the modulation on the source and also use it to look at the RX performance.

For the FW, you want to use the latest which can be downloaded here. You can view the RadioTool User's Guide here.

BR,

Seong

0 Stephen Welch over 4 years ago in reply to Seong Kim

Prodigy 90 points

Hello Seong,

Are you referring to a signal generator for modulation source? Is there an example build that works with the CMW-500 WLAN signaling software?

Thanks,

Steve

0 Seong Kim over 4 years ago in reply to Stephen Welch

TI__Mastermind 41065 points

Steve,

Yes, the RadioTool GUI serves as a control panel for direct access to the CC3235SF's radio for both TX and RX testing (Refer to Section 7.2 and 7.3 in the Radio Tool User's Guide). It can also be used for both RF evaluation and for certification testing purposes.

BR,

Seong

0 Stephen Welch over 4 years ago in reply to Seong Kim

Prodigy 90 points

Seong,

The Radio Tool does not work with a CMW-500. Do you have an example build that would allow me to test the device using a CMW-500?

This link provides a useful app note to explain some of the WLAN testing done with a CMW-500: https://scdn.rohde-schwarz.com/ur/pws/dl_downloads/dl_application/application_notes/1c107/1C107_2e_WLAN_SignalingData_TestConfig.pdf

Thanks,

Steve

0 Seong Kim over 4 years ago in reply to Stephen Welch

TI__Mastermind 41065 points

Stephen,

What tests are you planning to do with the CMW-500?

BR,

Seong

0 Stephen Welch over 4 years ago in reply to Seong Kim

Prodigy 90 points

Hello Seong,

I would like to know what tests TI recommends to ensure the design meets WLAN standards, but the CMW can test Tx power, spectrum mask, spurious emissions, frequency tolerance, frequency leakage, spectral flatness, modulation accuracy and EVM. Also Rx tests like sensitivity, adjacent channel rejection, and CCA sensitivity.

Thanks,

Steve

0 Seong Kim over 4 years ago in reply to Stephen Welch

TI__Mastermind 41065 points

Steve,

You can download the LAUNCHXL-CC3235's CE, FCC, and ISED Certification Reports from this page. These reports show which RF tests were done to certify the board by each region and it also outlines the test procedures. Note that the Radio Tool GUI was used for these tests to provide channel/frequency selection, power level, data rate for continuous TX and RX signals.

I'm not clear as to why you're saying that the Radio Tool GUI will not work with the CMW-500. Could you please explain as to why?

BR,

Seong

0 Stephen Welch over 4 years ago in reply to Seong Kim

Prodigy 90 points

The CMW-500 acts like an access point and uses ICMP echo requests to get a response from the DUT. It uses the echo packets from the DUT for measurements. As far as I can tell you can't attach the DUT to an access point with the radio tool, and it is not set up to automatically respond when pinged.

After a lot of trial and error I determined how to get our DUT to work with the CMW-500. A standard firmware build that allows the DUT to connect to an AP and automatically sends ICMP response pings should work. There are a few settings on the CMW-500 that are tricky so I recommend reading through Rohde & Schwarz app notes 1C106 and 1C107.

Because of the Thanksgiving holiday in the U.S., TI E2E™ design support forum responses may be delayed from November 25 through December 2. Thank you for your patience.

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CC3235SF: Connecting to a CMW-500 for WLAN testing