National Instruments GPIB-120A ユーザーズマニュアル

© National Instruments Corporation

B-1

GPIB-120A User Manual

Appendix B
Specifications

This appendix lists the specifications of the GPIB-120A.

Table B-1. System Configuration

Configuration

Specification

Loading per expansion

Up to 14 additional devices

GPIB driver output circuit and T1 timing
of source device

No restrictions

Note: T1 is the data settling time (DIO valid to DAV) and varies according to the type

of drivers and the system configuration used.

Table B-2. Performance Characteristics

Characteristic

Specification

Data transfer rate degradation

250 ns per byte, typical

Propagation delay

All signals except DAV

DAV (first byte)

DAV (subsequent bytes)

140 ns typical for signal assertion edge
180 ns typical for signal unassertion edge
200 ns maximum

2.5

s typical for signal assertion edge

180 ns typical for signal unassertion edge

140 ns typical for signal assertion edge
180 ns typical for signal unassertion edge
200 ns maximum

Transfer Rate

Read from isolated GPIB instrument

Write to isolated GPIB instrument

GPIB commands to isolated GPIB

instrument

800 kbytes/s maximum

320 kbytes/s maximum