As I said, the far end was open.
Ooh. More reading comprehension faults here.
I suspect all cables will work equally well if they aren't connected.
Carry on!
As I said, the far end was open.
Without seeing the setup, I can make a pretty good guess about what's being seen here. The open end gives it away.
SOLID LONG-GRAIN COPPER (LGC) CONDUCTORS: Solid conductors eliminate strand-interaction distortion. Evergreen’s solid Long-Grain Copper allows a smoother and clearer sound than cables using regular OFHC (Oxygen-Free High-Conductivity) copper. OFHC is a general metal industry specification regarding “loss” without any concern for distortion. LGC has fewer oxides within the conducting material, less impurities, less grain boundaries, and definitively better performance.
FOAMED-POLYETHYLENE INSULATION: Any solid material adjacent to a conductor is actually part of an imperfect circuit. Wire insulation and circuit board materials all absorb energy (loss). Some of this energy is stored and then released as distortion. Tower uses air-filled Foamed-Polyethylene Insulation on both conductors because air absorbs next to no energy and Polyethylene is low-loss and has a benign distortion profile. Thanks to all the air in Foamed-PE, it causes much less of the out-of-focus effect common to other materials.
METAL-LAYER NOISE-DISSIPATION SYSTEM (NDS): 100% shield coverage is easy. Preventing captured RF Interference from modulating the equipment’s ground reference requires AQ’s Noise-Dissipation System. Noise-Dissipation System prevents a significant amount of RFI from reaching the equipment’s ground plane.
ohhhhh - suspense!
From the Amazon product description:
Are the differences in reflections due to the asymmetric shielding coverage (aka "Metal-Layer Noise-Dissipation System" )?
The differences are due to the shield being connected in the far end only. Attaching it at both ends results in normal behaviour.Are the differences in reflections due to the asymmetric shielding coverage
Nonsense. A cheap RG-58 or RG-59 coax is quite insensitive to positioning. The AQ cable does depend on position, but the asymmetry is still clear.Nope, you'd see the same differences with any unterminated cable at that time scale unless you REALLY carefully controlled physical positioning, which in swapping directions, I'll bet was not done. Terminate it properly and the positioning won't be nearly as critical.
Does this help?It would have made things clearer if you had diagrammed your test setup...
AFG----+----[AQ cable]
|
[Scope]
T coupling on the scope input, which is set to 1 MΩ.That's even more unclear.
T coupling on the scope input, which is set to 1 MΩ.
AFG output (50 Ω) to T with short RG-58.
AQ cable on other side of T.
Crocodile clip.How do you attach the shield at both ends?
Do not buy AudioQuest. It's snake oil, and poor quality at that.Do AudioQuest Tower and AudioQuest Evegreen have a good soldering? Are they good in general?
Or should i look for other brand?
What about Monster MC250I?Do not buy AudioQuest. It's snake oil, and poor quality at that.
If you want a good name brand, get some Blue Jeans cable. Good non snake oil cable. Good quality ends. It's maybe more than you need. But the piece of mind is inexpensive.What about Monster MC250I?