2 Connection Setup
2.1 Overview
To enable remote control of the analyzer, the user must enable the HiSLIP server
or Socket server in the settings of the analyzer's program. After that the analyzer’s
program waits for connection from the user program (client).
HiSLIP server and Socket server use various network protocols based on TCP/IP
protocol. HiSLIP is a specialized protocol developed for measuring and test
equipment. TCP/IP Socket is a general-purpose protocol.
It is possible to simultaneously enable both HiSLIP and Socket servers in the
analyzer program. In this case, the client determines the connection protocol.
When using the VISA library, the client selects the protocol by specifying it in the
address string of the analyzer.
After a connection has been established on the initiative of the client, the latter
can send text commands and read the results of the measurements. The command
set is the same for both protocols and is described in sections 3 and 4.
The VISA library hides the details of protocol implementation from the user and
provides an uniform I/O interface. Nevertheless, there are some minor differences
in programming methods using the HiSLIP and TCP/IP Socket protocols, which are
described later in Section 2.7.
Usually the user program and the analyzer program run on different computers
connected by the local network. However, it is possible that the user and analyzer
program runs on the same computer. In the latter case, the client specifies the IP
address of the analyzer's computer – 127.0.0.1 or the network name of the
analyzer's computer – localhost.
Multiple analyzer programs can be executed on the same computer (when several
USB analyzer blocks are connected). In this case, remote control of each analyzer
is possible. For this purpose, the user must specify a unique TCP/IP port number in
the settings of each analyzer program.
One analyzer program does not limit the number of simultaneously connected
clients. Clients themselves are responsible for the absence of conflicts in the
remote control of the analyzer. The HiSLIP protocol supports the exclusive or
shared lock of the analyzer by the client. For more details about locks, see the
VISA manual.
2.2 Analyzer Setting
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