Lowrance HDS-7 Gen3 Installation Manual US - Page 50

Mode (WIFI-1 only) When more than one WIFI-1 device is connected (i.e. on large installations), only one may operate as 'Primary'. Primary mode determines that the device is acting as DHCP server - only one DHCP server may exist on a network at a time. To set a device as secondary, the HDS Gen3 must initially be connected to only one WIFI-1 module, which should be set to 'secondary'. Once completed, a second module may be plugged in, which will automatically default to primary.  Note: Use of multiple devices is solely for range extension purposes, and is usually only required on larger vessels. Channel Channel setting is available in order to overcome potential interference to the GoFree device by another RF device transmitting in the same frequency band. Advanced Tools are available within the HDS Gen3 software to assist in fault-finding and setting up the wifi network. Iperf Iperf is a commonly used network performance tool. It's provided for testing wireless network performance around the vessel so weak spots or problem areas can be identified. The application must be installed on and run from the tablet device. The HDS must be running Iperf server before initiating the test from the tablet. On exiting the page, Iperf will automatically stop running. DHCP Probe The wireless module contains a DHCP server that will allocate IP addresses for all the MFDs, radars and sonars in a network. If integrating with other devices, such as a 3G modem or satellite phone, other devices in the network may also be acting as DHCP servers. To make it easy to find all DHCP servers on a network, dhcp_ probe may be run from the HDS. 48 | Software setup | HDS Gen3 Installation Manual