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STB6684/A Operation Manual
Figure 7-1-2 shows that the serial interface pin definition of this instrument is different from that of
9 pin connector used in IMB AT compatible computer. User can make three-wire connection cable
by using double-core shielding lines or purchase the serial interface cable from our company.
When making connection cable, please short the 4
Connect the instrument with PC through serial interface. Set the bus mode firstly as RS232.
Serial interface specifications
Transmitting mode
Baud rate
Data bits
Stop bits
Parity bits
Terminal character
Handshake mode
Connector
Command syntax and format will be described in chapter 6 "Command Reference".
8.2 GPIB interface operation
8.2.1 GPIB bus
IEEE488 (GPIB) is an international bus interface standard used on interlligent instruments. IEEE is
the English abbreviation of Institute of Electrical and Electronics Engineers, and 488 is
the standard number. Through this interface, STB6684STB6684A can communicate with PC or
others intelligent equipments and meanwhile can make up automatic test system with the
other test equipments. Two or more equipments can be connected on a same bus. STB6684/
STB6684A applies IEEE488.2 and the interface plate can be optionally purchased by user. Control
command system is open so that user can use the PC operation interface provided by
STB6684/STB6684A or take measurements by the control command system. The control
command system supports most functions of the instrument, that is to say, user can execute
almost all operations on PC. Thus remote control to the instrument is realized.
th
pin and the 6
Table 7-3 Serial interface specifications
Full Duplex Asynchronous Communication containing start
bit and stop bit
Preset as 9600 bps
8 BIT
1 BIT
None
NL（Line break, ASCII code 10）
Software handshake
DB 9 pin
◇ 91
Chapter 8 Remote Control
th
th
pin, the 7
pin and the 8
th
pin.
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