EM waves don't care if your 175MHz carrier is modulated with analog or digital information. The marketing of 'digital' antennas is just to capitalize on the confusion.
'91 Pickup - Imelda
'08 Tacoma TRD - Donna
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'12 Gunnar Rockhound 29
"To live is to suffer, to survive is to find some meaning in the suffering." -- Friedrich Nietzsche