Yes, a 3m pole is optimistic when you’re hopefully testing down to the mm resolution.
The best way I’ve found to truly test the NTRIP source and the device is to establish permanent threads somewhere handy (your yard, office, etc). That lets you log points over days/weeks to compare. Export the points from SW Maps with UTM selected (link to a previous post).
Then ChatGPT can make you a fancy 3D plot in seconds:
Don’t bother with Averaging in SW Maps while you are collecting. Performing more measurements under different conditions (days) is what makes me start to trust the entire System, not collecting more data under the same conditions.
This is how you can gain (or lose) confidence in your particular System/Setup/Workflow.
Also, I always recommend 15 & 30 for Elevation Mask and carrier/noise ratio as a starting point, but don’t be afraid to go even higher:
minCNO=10 [ use 30+]
minElev=10 [ use 15+]
Have fun with PP RTCM 