Directed HD Radio static and popping
So I've picked up the Directed DMHD1000 HD Receiver unit, and wired it into my existing head unit (Pioneer BT700 if I remember correctly). Problem is, I get a metric tonne of static and popping, whereas on the aftermarket head unit, I get practically none. It's going in a 350Z, and I have tried a bunch of combinations, but I'm hoping someone can help me figure out if this is a one-off issue, or if this is an issue everyone has had. I've done some searching on the forums, but haven't seen much in the way of the same situation.
What I've done to troubleshoot is:
HD Rec'r connected via RCA (white/red) to my head unit AUX IN
HD Rec'r connected via RCA (white/red) to a regular home theater rec'r
HD Rec'r connected via stereo headphone jack to the input of my head unit
All three tests resulted in loud popping/crackling when any bass audio would come through, and volume levels changed all the time.
I know it's not my antenna as my normal head unit gets great reception, even when daisy-chaining through the HD Rec'r. It's only when the HD Rec'r gets switched on do I get the static and popping. My antenna is amplified whenever the car is on (verified), and all these tests were done with the ignition on.
I've tried connecting this via independent power sources like battery jumper packs, and another antenna which I know works as it is used on my vintage mustang, but with the same result.
At this point, I'll be happy to hear any input on this I can get, prior to calling Directed Tech.