CC1125: Trouble for passing ARIB over the 710-900 Band

Laurent SOUBIELLE

Part Number: CC1125

We have some trouble with passing ARIB requirement using a CC1125 TI transceiver. Over the band 710 to 900 MHz and following the T245 test method document, we can see that the measured level is higher that the T108 limits.

Is there any specific configuration to activate to be compliant with T108 limits?

over 8 years ago

0 PM over 8 years ago

TI__Mastermind 27145 points

Hi,

Please refer to Application Note SWRA445 for measurement settings. If you follow the same technique ( using RMS Detector instead of Peak detector) in measurement then it will pass the spec.

The following is the link to SWRA445.

http://www.ti.com/lit/an/swra445/swra445.pdf

Thanks,

0 Laurent SOUBIELLE over 8 years ago in reply to PM

Prodigy 20 points

I understand your point when you want to search for a specific spurious at determined frequency (step 4), so far what we have is the whole signal above limit and not a spurious (step 3), which makes step 4 not applicable

0 TER over 8 years ago in reply to Laurent SOUBIELLE

TI__Guru**** 317180 points

2.3 in www.ti.com/.../swra445.pdf explains why RMS detector (and not max) can be used in this case.

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CC1125: Trouble for passing ARIB over the 710-900 Band