I am reverse-engineering a device so that I can develop my own, compatible device. There are a number of SMD Ferrite Chips (size 0603) inside.
A quick look at Digikey shows that there are almost 600 different size 0603 Ferrite Chips in stock and active.
I'm looking for guidance on how I can characterize the original parts and come up with a suitable alternative. Measuring the DC resistance is easy. But I'm not sure about the rest.
What approach might allow me to choose a suitable device?
This is for an interface to a digital walkie-talkie. UHF band: 400 - 470 MHz. Speaker & Mic connections are my main concern.
My first thought (after I posted my question) is to use a cheapie spectrum analyzer and signal generator and spot-check attenuation using the 50 Ohm input impedance of the spectrum analyzer.
I'm not sure what else I should be looking for..