National Instruments GPIB-120A ユーザーズマニュアル
Theory of Operation
Chapter 3
GPIB-120A User Manual
3-4
© National Instruments Corporation
Acceptable Identification Codes
Bus A and Bus B of the GPIB-120A are each capable of appearing as a GPIB device having the
GPIB capabilities listed in Table 3-1. For a complete description of each code, consult the
ANSI/IEEE Standard 488.1-1987, IEEE Standard Digital Interface for Programmable
Instrumentation.
GPIB capabilities listed in Table 3-1. For a complete description of each code, consult the
ANSI/IEEE Standard 488.1-1987, IEEE Standard Digital Interface for Programmable
Instrumentation.
Table 3-1. IEEE 488 Capability Identification Codes
Capability Code
Description
SH1
Source Handshake
AH1
Acceptor Handshake
T5, TE5
Talker, Extended Talker
L3, LE3
Listener, Extended Listener
SR1
Service Request
RL1
Remote/Local
PP1, PP2
Parallel Poll
DC1
Device Clear
DT1
Device Trigger
C1, C2, C3, C4, C5
Controller
E1, E2
Three-state bus drivers with automatic switch
to open collector during parallel poll