64
c
HAPTER
4:
Computer Interface Operation
F71/F41 Teslameter
4.4.2.2 Ethernet Configuration
Configuration and status for these network configurations can be found from the
front panel by tapping the Settings menu (top left corner of the screen) to go to the
navigation drawer. Then tap System settings. Wi-Fi and Ethernet settings can be
found in the Connectivity box. Touch either item to see further settings.
4.4.2.3 Network Address Parameters
Network address parameters, common to both Ethernet and Wi-FI, include the IP
address, the subnet mask, gateway address, and DNS address. The network address
parameters of the teslameter can be configured using one of two methods:
DHCP or Static-IP.
D
IP Address:
an IP address is required for a device to communicate using TCP/IP,
which is the protocol generally used for Ethernet devices and the teslameter. The
teslameter supports both IPv4 and IPv6. However, for simplicity, references to
the IP protocol from this point forward will be referring to IPv4.
An IP address is a 32-bit logical address used to differentiate devices on a net-
work. It is most often given in dotted decimal notation, such as nnn.nnn.nnn.nnn
where nnn is a decimal number from 0 to 255.
D
Subnet Mask:
a sub network, or subnet, is a group of devices within a network that
have a common, designated IP address routing prefix. A subnet mask is a 32-bit
“bit mask” that signifies which part of the IP address represents the subnet rout-
ing prefix, and which part represents the device’s address on the subnet. A subnet
mask is most often given in dotted decimal notation, such as nnn.nnn.nnn.nnn
where nnn is a decimal number from 0 to 255. When converted to a binary nota-
tion, the 32-bit subnet mask should consist of a contiguous group of ones, fol-
lowed by a contiguous group of zeros. The ones represent which bits in the IP
address refer to the subnet, and the zeros represent which bits refer to the device
address. For example, the default Static-IP Address of the teslameter is
192.168.0.128, and the default static subnet mask is 255.255.255.0. Converting
this subnet mask to binary shows that the first 24 bits are ones, and the last 8 bits
are zeros. This means that the first 24 bits of the Static-IP Address (192.168.0)
represent the subnet, and the last 8 bits (12) represent the device.
D
Gateway Address:
a gateway is a network traffic routing device that is used to route
communication between networks. If a gateway is not used, then devices on a
network can only communicate with other devices on that same network. A gate-
FIGURE 4-11
Ethernet settings
