Which fields should I compare first?
Construction, surface resistance, width, thickness, shielding effectiveness by frequency, test method and environmental data.
What is a common mistake?
Comparing one supplier's peak dB value with another supplier's minimum or average value from a different method.
What if test methods differ?
Treat the data as indicative and request comparable testing or evaluate samples in your own assembly.
Project note: Use supplier data as a starting point. Validate the finished assembly at the relevant frequencies and environmental conditions.