Annex
NRP2
361User Manual 1173.9140.02 ─ 07
A.2.3 Ethernet interface
The R&S NRP2 has a 10/100BaseT Ethernet female connector for remote control via a
LAN, based on TCP/IP. The female connector is located on the instrument rear. The
interface enables a controller to operate the R&S NRP2 by remote control using the
SCPI commands of the R&S NRP2. The commands of the IEC/IEEE 488.1 and IEC/
IEEE 488.2 standards are partly emulated via special software commands. The remote
control protocol for this interface is based on an IEC/IEEE draft protocol, described
below.
A.2.3.1
IEC/IEEE 1174 draft
The IEC/IEEE 1174 draft (in the current version D2) defines communications via a
serial RS-232-C interface which is based on the existing IEC/IEEE 488.1 and IEC/IEEE
488.2 standards for the IEC/IEEE bus interface. Additional control sequences, initiated
by an & character, emulate the IEC/IEEE bus functionality.
Example:
The special control sequence ">L"
emulates the IEC/IEEE bus command GoTo
Local.
All control characters defined in the IEC/IEEE 1174 draft are listed in table 1-6. This
chapter describes how the control sequences can be used for remote control via
RS-232-C or Ethernet.
The IEC/IEEE 1174 draft provides three different operating modes for transmitting the
special control sequences. These modes can be set via remote control using the fol-
lowing command:
SYSTem:COMMunicate:INET:MODE 0 | 1 | 2
The parameter has the following meanings:
●
0: no control sequences (abbr.: 1174.0 mode)
●
1: the IEC/IEEE 488.1 mode (abbr.: 1174.1 mode)
●
2: the IEC/IEEE 488.2 mode (abbr.: 1174.2 mode)
The IEC/IEEE 1174.0 mode
The IEC/IEEE 1174.0 mode (raw socket communication) does not provide an emula-
tion of the IEC/IEEE bus functionality.
●
Special control commands like those used by the higher IEC/IEEE 1174.1 and
1174.2 modes are not provided.
●
The & character is not doubled.
●
The state change "local →
remote"
is achieved by receiving data.
●
The state change "remote → local" is achieved by clearing down the connection
(peer sockets).
Remote control interfaces
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