If two or more GSV-4 or GSV-8 are to be synchronized, this can be achieved by configuring the devices in master / slave mode.
The desired data frequency is set on the device configured as the master.
The devices configured as slaves send measured values at the request of the master.
The (internal) data frequency on the slave must also be set to at least as high as on the master. Otherwise, no measured values are available in the requested frequency. The slave then sends the same measured value several times.