Section 2: General operation
Models 707B and 708B Switching Matrix Reference Manual
2-62
707B-901-01 Rev. B / January 2015
Addressing instruments through the LAN
VISA supports two different LAN protocols, each of which has a different resource string.
VXI-11
is a protocol that emulates GPIB over the LAN. Models 707B and 708B supports this protocol.
The resource string is:
TCPIP[
board
]::
host address
[::
LAN device name
][::INSTR]
board
is the network interface card in the computer. This value is usually skipped and VISA
determines the correct network interface card (if you have more than one) by looking at the IP
address.
host address
can be either a valid DNS hostname, mDNS hostname, or the IPv4 IP (only) address
of the instrument.
LAN device name
is a method of addressing secondary instruments at the main IP address, similar
to secondary addressing on the GPIB bus. The default is
inst0
.
A
raw socket
connection requires more work by the driver or application program to make sure the
correct amount of data has been sent or received correctly. All Keithley instruments support the raw
socket connection.
TCPIP[
board
]::
host address
::
port
::SOCKET
The
board
and the
host address
are the same as for the VXI-11 protocol.
port
is the port to which to connect on the instrument. For the Models 707B and 708B, the port is
5025. See
(on page 2-39) for a complete list of port numbers.
Addressing instruments using USB
USB[
board
]::
manufacturer ID
::
model code
::
serial number
[::
USB interface
number
][::INSTR]
board
is not used (
0
).
manufacturer ID
is the USB.org reserved four-digit hexadecimal code for the instrument vendor
company. Keithley Instruments hexadecimal code is
05E6
.
model code
is the model number of the instrument. For example, when addressing a Model 707B,
use
707B
.
serial number
is the serial number of the instrument.
USB interface number
identifies which USBTMC interface on the instrument to address
(usually
0
).
Also see
(on page 2-30).
