Annexes
R&S
®
ZNA
1420
User Manual 1178.6462.02 ─ 12
11.3.2
LAN Interface
To be integrated in a LAN, the instrument is equipped with a LAN interface, consisting
of an RJ-45 connector, a network interface card and protocols. The network interface
card supports IEEE 802.3 for a 10 Mbps Ethernet and IEEE 802.3u for a 100 Mbps
Ethernet.
Instrument access is possible via the VXI-11 protocol. It is usually achieved from high
level programming platforms by using the Virtual Instrument Software Architecture
(VISA) library as an intermediate abstraction layer. VISA encapsulates the low-level
function calls and thus makes the transport interface transparent for the user. See also
Chapter 7.1, "Introduction to Remote Control"
11.3.2.1
VXI-11 Interface Messages
The following VXI-11 interface messages (also termed low-level control messages) are
also supported by the GPIB Explorer.
Command
Meaning
Effect on the instrument
@DCL
Device Clear
Aborts the processing of the commands just received and sets
the command processing software to a defined initial state.
Does not change the instrument settings.
@GET
Group Execute
Trigger
Triggers the active measurement sequence (e.g. a sweep).
The effect of the command is the same as with that of a pulse
at the external trigger signal input.
@LOC
Go to Local
Transition to the "local" state (manual control).
@REM
Go to Remote
Transition to the "remote" state (remote control).
11.3.3
GPIB Interface
The R&S
ZNA can be equipped with a GPIB (IEC/IEEE) bus interface (option
R&S
ZNA-B10. The interface connector labeled "GPIB" is located on the rear panel of
the instrument. The GPIB bus interface is intended for remote control of the R&S
ZNA
from a controller.
Characteristics of the interface
●
8-bit parallel data transfer
●
Bidirectional data transfer
●
Three-line handshake
●
High data transfer rate of max. 1 MByte/s
●
Up to 15 devices can be connected
●
Wired OR if several instruments are connected in parallel
Interfaces and Connectors
