4 ms·No, but you can add it if you want a lower noise floor.by mastax 6y agoNo, but you can add it if you want a lower noise floor.shmerl 6y agoI mean how critical is it? Just an improvement in quality or it's bad without it?myself248 6y agoYes, both. It depends on what you're doing. Tractors don't need to be aerodynamic.MayeulC 6y agoLower noise floor = easier to grab low-power or distant signals. It really depends on your use-case.