R&S FSL Interfaces and Protocols
1300.2519.12 5.33 E-11
GPIB Interface (Option R&S FSL–B10)
The standard instrument is not equipped with an GPIB connector, but can be accessed via the LAN
interface for remote control. The option R&S FSL–B10 provides a GPIB interface. For details on the
connector and its use refer to the Quick Start Guide, chapter 1 "Front and Rear Panel".
GPIB Basics
The GPIB interface is described by the following characterisitics:
• 8–bit parallel data transfer
• bi–directional data transfer
• three–line handshake
• high data transfer rate of max. 700 kbyte/s
• up to 15 instruments can be connected
• maximal length of the interconnecting cables 15 m (single connection, 2m)
• wired–OR connection if several instruments are connected in parallel.
Depending on the bus type the following bus lines are used:
• Data bus with 8 lines D0 to D7.
The transmission is bit–parallel and byte–serial in the ASCII/ISO code. D0 is the least significant bit,
D7 the most significant bit.
• Control bus with 5 lines
IFC (Interface Clear) active LOW resets the interfaces of the instruments connected to the
default setting.
ATN (Attention)
active LOW signals the transmission of interface messages.
inactive HIGH signals the transmission of device messages.
SRQ (Service Request) active LOW enables the connected device to send a service request
to the controller.
REN (Remote Enable) active LOW permits switchover to remote control.
EOI (End or Identify)
has two functions in connection with ATN:
ATN = HIGH
active LOW marks the end of data transmission.
ATN = LOW
active LOW triggers a parallel poll.
• Handshake bus with three lines
DAV (Data Valid) active LOW signals a valid data byte on the data bus.
NRFD (Not Ready For Data) active LOW signals that one of the connected devices is not ready
for data transfer.
NDAC (Not Data Accepted) active LOW signals that the instrument connected is accepting the
data on the data bus.
To Next Page
Loading...
