If two or more GSV-4 or GSV-8 need to be synchronized, this can be achieved by configuring the devices in master/slave mode.
The desired data frequency is set on the device that was configured as master.
The devices that have been configured as slaves send measured values at the request of the master.
The (internal) data frequency on the slave must also be set 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.