Positive differential i2c line to ground:
V_min: 840 mV V_min: 720 mV
V_max: 1.72 V V_max: 1.80 V
Approximately 90 mVpp of noise has been introduced to this signal.
Inverted differential i2c to ground:
V_min: 1.32 V V_min: 1.24 V
V_max: 2.16 V V_max: 2.28 V
Approximately 100 mVpp of noise has been introduced to this signal.
Positive diff i2c to inverted diff i2c:
V_min: -360 mV V_min: -400 mV
V_max: 1.28 V V_max: 1.40 V
Approximately 80 mVpp of noise is observed in this signal.
i2c data line to ground (on solar master board ie. destination):
V_min: -120 mV V_min: -80 mV
V_max: 3.16 V V_max: 3.12 V
Noise is negligible.
We can see from the scope readings of the differential i2c lines that there is some substantial noise introduced by the walkie talkies, which is not observed at the destination.
One potential concern is that the noise is present when measuring between the two differential i2c lines. This is likely explained by the probing wires used picking up additional noise. If this is the case, then these measurements have even more noise than should be expected in regular operation.