Yes. Making sure that equipment under test doesn't radiate too much unintended RF so it doesn't interfere with other pieces of kit. And, conversely, making sure that its normal operation isn't too susceptible to interference from RF fields from other sources. To do both, you need to know the RF environment you are in - so, for example, if you are looking for emissions you need to discount signals from broadcast radio, the local taxi firm etc. if you are on the surface (screened rooms aren't perfect). Go underground, there's nothing except the equipment you took and the equipment to make the test facility work.
