I tried the exact same process with my racked AXE FX II XL.
Blank preset.
INPUT >808> Noise Gate>OUTPUT
With nothing on it was a straight pass through of levels and tone in all three channels of the CA TRiptik (just like pphillips is gettign with the HELIX).
No added noise that I would not get normally.
NoiseGate worked perfectly in all three channels.
Dead silent.
I do not have a complete valid scientific explanation, but the AXE FX does have some alleged proprietary output jack circuitry to reduce noise and I am using a humbuster cable from AXE FX OUTPUT to the Guitar Amp Input which is nothing more than a cheap cable with TRS on one end and TS on the other.
For the reasons likely noted above by folks in this thread - at least in my older house with various wiring circuits added on over the past 60 years- the interaction of the HELIX and my CA Trip doesn't work so well. :unsure: It is a RF/EMI magnet.
The circuit it is on is newer and properly grounded- but I am guessing all of the house circuits go to a common ground.
Anyway- guess I will just use the AXE FX when I want to throw a virtual pedal and Noisegate in front.
I have to run a cable twenty feet acorss the room but not that big of a deal.
I had picked up the HELIX for a lot of reasons and one was to use on the floor sometimes near my amp and I liked the all in one package, but it is not going to work as a traditional in front of amp pedal board. 4CM works fine and can still certainly use that.
