User`s guide

Features and Functions 3
Agilent 34980A Mainframe User’s Guide 71
IP Address
An Internet Protocol (IP) Address is required for all IP and TCP/IP
communications with the instrument. If DHCP is enabled (factory setting),
the specified static IP address is not used. However, if the DHCP server
fails to assign a valid IP address, the currently configured static IP
address will be used.
If you change the IP address, you must cycle power on the 34980A to
activate the new setting.

• The default IP Address for the 34980A is “169.254.9.80”.
• Dot- notation addresses (“nnn.nnn.nnn.nnn” where “nnn” is a byte
value) must be expressed with care, as most web software on the
computer will interpret byte values with leading zeros as octal numbers.
For example, “255.255.020.011” is actually equivalent to decimal
“255.255.16.9” not “255.255.20.11” because “.020” is interpreted as “16”
expressed in octal, and “.011” as “9”. To avoid confusion, use only
decimal expressions of byte values (0 to 255), with no leading zeros.

For example, the 34980A assumes that all dot- notation addresses are
expressed as decimal byte values and strips all leading zeros from these
byte values. Thus, attempting to set an IP address of “255.255.020.011”
will become “255.255.20.11” (a purely decimal expression). Be sure to
enter the exact expression, “255.255.20.11”, in your computer web
software to address the instrument. Do not use “255.255.020.011” — the
computer will interpret this address differently due to the leading zeros.
• If you are planning to use a static IP address on a Corporate LAN,
contact your network administrator to obtain a fixed IP address to be
used exclusively for your instrument.
• The IP address is stored in non- volatile memory, and does not change
when power has been off, after a Factory Reset (
*RST command), or
after an Instrument Preset (
SYSTem:PRESet command).
Front Panel Operation:
Utility > REMOTE I/O > LAN > LAN SETTINGS > MODIFY > DHCP OFF > 
AUTO IP OFF > IP ADDRESS
Remote Interface Operation:
SYSTem:COMMunicate:LAN:IPADdress "<address>"