Place the antenna at least 50 cm away from SM Pro. In StellarMate App, tap the GPS status indicator to toggle between the Passive & GPS antennas.
GPS status is displayed in the StellarMate Pro App Power tab.

Specifications
Model Number:ZX-22
VSWR:Max 2.
Frequency:1575.42 MHz
Cable Length:3M/Customized
Cable type:RG174 Coax Cable
Impedance:50 Ohm
Size:50*40*20mm
Maximum input power (W):10w
Material:ABS