R&S NRP2, User Manual

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Remote control interfaces
R&S
®
NRP2
351 User Manual 1173.9157.02 ─ 03
A.1.4 GPIB bus interface
Instruments which can be controlled via GPIB bus can be equipped with different interface
functions. The interface function for the R&S
NRP2 are listed in the following table.
Table 1-1: GPIB bus interface functions
Control
character Interface function
SH1 Source handshake
AH1 Acceptor handshake
L3 Listener function, Listen-Only mode, unaddressed for MSA and TPAS, recognizes END and
EOS.
LE3 Extended Listener function, Listen-Only mode, unaddressed for MSA and TPAS, recognizes
END and EOS.
T5 Talker function, capability to respond to serial poll, Talk-Only mode, unaddressed on MLA,
sends END or EOS.
TE5 Extended talker function, capability to respond to serial poll, Talk-Only mode, unaddressed
for MLA and LPAS, sends END or EOS.
SR1 Service request function
PP1 Remote parallel-poll function
PP2 Local parallel-poll function
RL1 Remote/local switchover function
DC1 Device clear
E2 3-state driver (open-collector driver during parallel poll)
DT1 Device trigger
C0 No controller capabilities
A.1.5 Interface messages
Interface messages are transmitted to the device on data lines, where the ATN is set to
active LOW. They are used for communication between the controller and the
R&S
NRP2.
A.1.5.1 Common commands
Common commands are in the code range 0x10 to 0x1F. They affect all devices on the
bus without any addressing being required.
GPIB Bus Interface