Other Parts Discussed in Thread: WL1837, WL1835
Tool/software:
Since over a year we tried to get our device that so far has failed through certification but so far without success.
We failed the certification in Taiwan for FCC and IC since then I measured the device here again in Germany and found out something interesting.
We tried to copy the design fro the Daughtercard https://www.ti.com/tool/WL1837MODCOM8I
If I only load the firmware onto the WL1837 it is already showing a very high 4.8GHz peak (WL1837 nur Firmware aufgespielt). If I do the same on the WL1835 it is not present that obvious.
If I start the TX Mode with 30dBm on the WL1835 and WL1837 the vertical and horizontal differ and I tried to capture the highest peak on the 4.8GHz.
Can you probably help on this issue? Is it maybe due to faulty firmware? (firmware and configfiles you find attached)
I do not know how to proceed on this matter, but I would try to find maybe a better matching circuit or analyze the Layout with you, but frankly, hopefully it is just a firmware problem.
Attached you find some plots of the WL1835 and WL1837 on the same layout and components surrounding them. but the one device passed the other one (WL1837) didn.t.
Can you help on this issue?
