What is the maximum cable distance between ublox ANN-MB antenna and SparkFun Qwix Zed -F9P board?
Comes with an attached 5m RG174 cable
With 28 dB of gain I’d imagine you could use several hundred feet of LMR-400, although TBH I’d probably chose a different antenna, and connection option to reduce the number of interfaces.
The recevier is measuring the phase-center of the antenna, regardless of cable length.
The maximal length will be determined by the loss in the cable, and the ability to get 3V DC to the far end to power it adequately.
^Everything he said
For reference, we’ve had folks uses 40m of RG58 with no issues: Maximum Cable Length Between Antenna and RTK Reference Station