Quote:
Originally Posted by b3lha
That is bad news. As the binary bits are coming down the wire, the converter is seeing a 1 (2 volts to 5 volts) when it should be seeing a 0 (0 volts to 0.8 volts).
I wonder if the signal voltage from the ECU is too high?
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Or is your input impedance/loading too low i.e. too sensitive. A higher relative loading would pull down the output/input signal voltage. This could be where the Subaru OEM monitor differs. The fact that you indicate that a zero voltage is not being recorded, points in this direction.
The lower the monitor input impedance/resistance; the greater the signal current; lower the voltage (Dependent on output capacity) and greater the immunity to noise. In all respects the transmitted signal is more robust, a worthwhile feature.
In other words, the existing signal could be overloading your gear. Think of the affect of overloading the input of an audio amp.