High Speed Bus Expander User Manual

Contents
GPIB-120A User Manual viii © National Instruments Corporation
NDAC (Not Data Accepted) ........................................................A-3
DAV (Data Valid)........................................................................A-3
Interface Management Lines....................................................................A-4
ATN (Attention)...........................................................................A-4
IFC (Interface Clear)....................................................................A-4
REN (Remote Enable) .................................................................A-4
SRQ (Service Request) ................................................................A-4
EOI (End Or Identify) ..................................................................A-4
Physical and Electrical Characteristics ................................................................A-5
Configuration Restrictions: The Role of Expanders and Extenders ...................A-8
Related Document............................................................................................................A-8
Appendix B
Specifications
..........................................................................................................................B-1
Appendix C
Multiline Interface Messages
............................................................................................C-1
Appendix D
Customer Communication
.................................................................................................D-1
Figures
Figure 1-1. Typical GPIB-120A Extension System (Physical Configuration) .....................1-1
Figure 1-2. Typical GPIB-120A Extension System (Logical Configuration).......................1-2
Figure 3-1. GPIB-120A Block Diagram ...............................................................................3-1
Figure A-1. GPIB Connector and the Signal Assignment......................................................A-5
Figure A-2. Linear Configuration of the GPIB Devices ........................................................A-6
Figure A-3. Star Configuration of the GPIB Devices ............................................................A-7
Tables
Table 3-1. IEEE 488 Capability Identification Codes .........................................................3-4
Table B-1. System Configuration .........................................................................................B-1
Table B-2. Performance Characteristics ...............................................................................B-1
Table B-3. Electrical Characteristics ....................................................................................B-2
Table B-4. Environmental Characteristics............................................................................B-2
Table B-5. Physical Characteristics ......................................................................................B-2