Manual
5
Model 835-M Programmer’s
Manual
V1.1 2011
•
IP Address:
Every computer/electronic device
in a
TCP/IP
network
require
s
an
IP address.
An IP
address has
four
number
s
(each
between 0 and
255) separated
by periods.
For
example: 192.168.1.50 is
a valid
IP
address.
•
Subnet Mask: The subnet
mask distinguishes
the portion of the
IP address
that
is
the network ID from the
portion that
is
the station ID. The subnet
mask 255.255.0.0,
when applied to the
IP
address given above,
would identify the network ID
as 192.168
and the station ID
as 1.50.
All
stations
in
the
same local
area
network
s
hould
have the
same
network ID, but different station IDs.
•
Default Gateway: A
TCP/IP
network
can
have a gateway to
c
o
mmunicate
beyond the
LAN
identifi
ed
by the
network ID. A gateway
is
a
computer
or
electronic device
that
is connected
to two
different
networks and
can
move
TCP/IP
data from one network to the other. A
single LAN
that
is
not
connecte
d
to other
LANs requires
a
default gateway setting of 0.0.0.0. If you have a gateway,
then
the
default gateway would be set to the
appropriate value of your
gateway.
•
MAC
Address:
A MAC
address is
a unique 48-bit value that identifies a network interface
card
to
t
he
rest of
the network.
Every
network
card has
a unique MAC
address
permanently stored into its memory.
Interface between the
signal
generator and other
devices
on the network
is
via a category five (CAT-
5) interface
cable connected
to a network.
This cable uses
four twisted
pairs
of
copper
insulators terminated
into an
RJ45 connector. CAT-5 cabling is capable
of supporting
frequencies
up to
100
MHz
and data transfer
speeds
up to
1 Gbps,
which
accommodates 1000Base-T, 100Base-T,
and 10Base-T networks.
The instrument
can
be remotely programmed
using
the
VXI-11 protocol.
A
VISA
I/O library (like NI-
VISA™) is
used
on the
server side
to facilitate the
communications.
A
VISA
installation on
the
controller is
a
prerequisite
for remote control over
LAN
interface.
VISA is
a
s
tandar
dized
software
interface library
providing input and output
functions
to
communicate
with
instruments. For
more information about
VISA
refer to the
VISA
library
supplier’s
documentation.
The
SCPI
command
set listed in the
Model
835-M
programmer’s
manual
applies
to LAN programming
as
well.
Only the
IP address
or the
device
name
is
required for link setup. The
IP address/device
name
is
part
of the
"visa resource
string"
used
by the
programs
for identification and control of the instrument. The
visa
resource
string
has
the form:
TCPIP::ipa
ddr::inst0::INSTR
ipaddr
has
to be
replaced
by the
IP address
or the
computer
name of the instrument.