I have a question when I listen to DPD on the NTIRN on broadcasting call platform / nodes I hear this annoying ( burp, hiccup, digital whiny noise about every 6 calls or so , however when I listen to calls on open Mhz I don't hear this noise ? Is this because broadcasting is not as good rebroadcasting these transmissions as on Open mhz site ? Or is it the feed provider ? Listening to DPD on the call's platform is difficult even though free it seems that when a priority call is dispatched that's when the noise starts ?