This is difference between fix&hold and continuous. Not going to tell you when to use either, thats up to you.
I used 2x RS+
base over known point with GPS/GLONAS @5hz on both rover and base.
Made a grid on the tarmarc, 1x1m with 20cm spacing. Started out at point A1 and went A1,A2,A3 etc then back again with B1, B2 etc.
Collected all points in survey mode, download CSV and imported this to Qgis for compare.
Fix&hold and mask at 15 degree angle on the first run, thought i had a good and valid fix with AR 999.9.
Lost fix after E2 and had to wait few minutes before i got fix again.
I noticed fix had shifted location but i continued the grid path to see how the final product would turn out.
As you can see from the picture above, plots are all over the placed but is tied to first and second run so you can see the pattern in both.
Now, which one is the right one?? This is the problem/danger with Fix&hold, it can trow you of by showing you AR 999 and make you think this is solid fix, but NOT.
If you where out on a job to record points, you would redo all your points. For good measure a second and third survey would rule out bad fix if done with some time appart.
Next up is Continuous and i set angle mask to 20. I bit lower AR, but stable fix for the entire run. I also surveyed over 3 known points for good measure. Now i know this is the right location with right coordinates for the grid
And som final pictures. Food for thoughts