How do I determine what we have? For SWM,,,
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HR20-100 Firmware
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If the #1 input of your DVR says FTM or SWM, then it's compatible
If you go to your satellite strength readings and scroll through the different satellite strengths, you will come to a SWM reading of 9 lines if yours is running SWM.
Also, there will be a power supply somewhere (most likely behind a TV) that feeds the SWM LNB if you have one
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