Before doing a Firmware upgrade write down all selected NMEAoutput formats and baudrates.After the upgrade configure the firmware with the settings used before. Use e.g. Easylog to get the correct baudrate and used message formats. After an upgrade from VBS1 to VBS2 the OmniSTAR Activation has to be resent.
* Not all GMS100/MAP-RT receivers are upgradeable to firmware 3.3 or higher. For those receivers,firmware 3.2 should be used.