Rohde & Schwarz SMC100A - Remote Control Via USB Interface; Interface and Device Messages; Interface Messages

R&S SMC100A Interface and Device Messages
1411.4060.32 5.9 E-1
Remote Control via USB Interface
The PC and the instrument must be connected via the USB type B interface. A USB connection
requires the VISA library to be installed on the controller. VISA will detect and configure the R&S SMC
a
utomatically when the USB connection is established. No entry of an address string and no separate
driver installation is necessary.
The used USB address string is:
USB::<vendor Id>::<product Id>::<serial number>::INSTR
0x0AAD is the vendor Id for Rohde&Schwarz, 0x54 is the product Id for R&S SMC and the serial
number is the individual serial number on the rear of the instrument.
Example:
"USB::0x0AAD::0x0054::100001::INSTR"
Interface and Device Messages
The messages transferred via the data lines of the IEC/IEEE-bus (see Section "IEC/IEEE Bus
Interface") or via a TCP/IP network can be divided into two groups:
• interface messages and
• device messages.
Interface Messages
Interface messages are transferred on the data lines of the IEC/IEEE bus, the ATN control line being
active. They are used for communication between controller and instrument and can only be sent by a
computer which has the function of an IEC/IEEE bus controller.
Interface commands can be further subdivided into
• universal commands
• addressed commands
Universal commands act on all devices connected to the IEC/IEEE-bus without previous addressing,
addressed commands only act on devices previously addressed as listeners. The interface messages
relevant to the instrument are listed in Section "IEC/IEEE Bus Messages".
If an Ethernet connection is present, signalling via a hardware control line is not required. The
IEC/IEEE-bus interface commands are emulated (see "IEC/IEEE Bus Messages").