Figure 4.2 Gpib Connector Diagram - ILX Lightwave LDX-36000 Series User Manual

There are eight data input/output lines, three handshake lines, and five interface
management lines.
Eight data I/O (DIO) lines carry both data (including device dependent commands)
and interface messages. The ATN interface management line determines
whether these lines contain data or interface messages.
Three handshake lines ensure that all data and messages are reliably transferred:
• NRFD (not ready for data) indicates whether a device can receive the next byte of data or
• NDAC (not data accepted) indicates whether a receiving device has accepted a byte of data
• DAV (data valid) indicates that the signal levels on the data lines are stable and available for
Five interface management lines control the flow of information:
• ATN (attention) is set by the controller in charge to define the I/O lines for data or interface
• IFC (interface clear) is set by the system controller to initialize the bus and assert itself as
• REN (remote enable) is set by the controller to place addressed devices into remote or local
• SRQ (service request) can be set by any device in the system to request service from the
• EOI (end or identify) is used by talkers to identify the end of a message.
03_10
message.
or message.
the receiving device(s) to accept.
messages.
controller in charge.
(front panel) control mode.
controller.
R E M O T E O P E R A T I O N

Figure 4.2 GPIB Connector Diagram

Basic GPIB Concepts
LDX-36000 Series
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C H A P T E R
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