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Chapter 4 Remote Interface Reference
Interface Configuration Commands
4
More About Dot Notation: Dot-notation addresses ("nnn.nnn.nnn.nnn"
where "nnn" is a byte value) must be expressed with care, as most web
software on the PC 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 33210A 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 PC web software to address the
instrument. Do not use "255.255.020.011" –the PC will interpret this address
differently due to the leading zeros.
SYSTem:COMMunicate:LAN:LIPaddress?
Returns the “last valid Auto IP address used” in dot notation (for
example: “169.254.20.11”).
SYSTem:COMMunicate:LAN:MAC?
Returns the 33210A’s Media Access Control (MAC) address. This is an
unchangeable 48-bit address assigned by the manufacturer to each
unique internet device. The MAC address is represented as 12
hexadecimal characters in the form “XX-XX-XX-XX-XX-XX” (for
example, “00-30-D3-00-10-41”).
SYSTem:COMMunicate:LAN:MEDiasense {OFF|0|ON|1}
SYSTem:COMMunicate:LAN:MEDiasense?
Disables or enables the MEDiasense feature. When enabled, this feature
detects a loss of LAN connectivity greater than 20 seconds, and then, on
sensing a reconnection, re-starts the LAN. The factory setting is enabled
(ON). The query returns “0” (OFF) or “1” (ON).
• If you change the MEDiasense setting, you must cycle power on the
instrument to activate the new setting.
• The MEDiasense setting is stored in non-volatile memory, and does
not change when power has been off, or after an instrument reset
(*RST).
33210A users guide.book Page 244 Wednesday, July 16, 2008 11:16 AM
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