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Hi , I`m JackPerhaps I can help you with this problem
What you need is an external digital tuner .
Here is one that is normally used to convert signal for TV's who have only analog tuners but it is exactly what you need for your DMR , click the link here ; http://www.amazon.com/3500STBII-Multi-Function-Converter-Recording-Playback/dp/B00GOILYB6
This will connect between your antenna and DMR .
It has its own remote and even records .
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