I repeated the test using a DS100 servo in place of the DS150 servo and observed no interaction.
Then I repeated the test gain with a standard-sized DS130 servo - also no interaction.
Then I tried the DS150 and two different servos (and a different XPS Nano receiver) - the interaction was back. So it seems that the interaction happens with the DS150 servo.
I tried using a servo extension cable that included a noise-suppressing toroid ferrite ring, but it made no difference, so I think you're right about it being the power draw of the servo.
The DS150 is a high torque, high speed servo in a small form factor, so I reckon it just draws a lot of power. For the tests I used two different 6.6v life receiver batteries, each proven in larger models with more servos. So I do not think the servo is "browning out" the system, just injecting some kind of noise.
Do you think the Vin and ground rails on the Nano receiver could be filtered using a capacitor?
Then I repeated the test gain with a standard-sized DS130 servo - also no interaction.
Then I tried the DS150 and two different servos (and a different XPS Nano receiver) - the interaction was back. So it seems that the interaction happens with the DS150 servo.
I tried using a servo extension cable that included a noise-suppressing toroid ferrite ring, but it made no difference, so I think you're right about it being the power draw of the servo.
The DS150 is a high torque, high speed servo in a small form factor, so I reckon it just draws a lot of power. For the tests I used two different 6.6v life receiver batteries, each proven in larger models with more servos. So I do not think the servo is "browning out" the system, just injecting some kind of noise.
Do you think the Vin and ground rails on the Nano receiver could be filtered using a capacitor?