About DBurt.1

DBurt.1 · 2020-09-28

ST25RU3993-eval PCB Internal amplifier output differential traces don't look right for preferred impedance. See the traces circled in red. Shouldn't these be 100 ohm differential the same as the purple mixer feedback traces? The trace width in the...

DBurt.1 · 2020-08-25

I have found on one day I get good performance and read range from the unit, but I can come in on the next day and only be able to read an inch or so with the same settings. Today it is working reasonably well again. Can anyone explain this?I need...

DBurt.1 · 2020-10-06

I re-checked on Saturn and it does agree very closely with your answer. For this one I had used pcbway, which gave just over 118 ohms. I suppose I'll cross that one off my list of calculators to use. Thanks.

DBurt.1 · 2020-09-30

I usually consult with Saturn toolkit, my cad built in calculator (Ultiboard), and some web based calculators (https://www.pcbway.com/pcb_prototype/impedance_calculator.html is one). They all match within a couple ohms. From the gerbers and manual ...

DBurt.1 · 2020-09-30

Thanks for the reply. I need to compromise on those nets as well. I ran the 100 ohm diff numbers and based on the gerbers and stack up specs and those look to be about 120 ohms. Why would that be?I'm needing to scrunch things down quite a bit more...

DBurt.1 · 2020-09-28

I see the balun chosen for the amplifier output has a 50 ohm balanced input rating. So perhaps those traces are meant to be 50 ohm differential rather than 100 ohms?Seems like the geometry I see in the gerber file is more like 64 ohms differential th...

DBurt.1 · 2020-09-04

Thanks for pointing out the save reader settings option. I was hoping I could do that but had only seen the antenna settings save function.I've been using adaptive sensitivity, AGC mode and adaptive Q. Setting target as A only and S1 session helped...

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ST25RU3993-eval PCB Internal amplifier output differential traces don't look right for preferred impedance.

Having some anomalies with and questions about the ST25RU3993eval.

Re: ST25RU3993-eval PCB Internal amplifier output differential traces don't look right for preferred impedance.

Re: ST25RU3993-eval PCB Internal amplifier output differential traces don't look right for preferred impedance.

Re: ST25RU3993-eval PCB Internal amplifier output differential traces don't look right for preferred impedance.

Re: ST25RU3993-eval PCB Internal amplifier output differential traces don't look right for preferred impedance.

Re: Having some anomalies with and questions about the ST25RU3993eval.