15/18 11.8 Instrument connectivity In addition to connecting sensors to various signal processing devices,we also often want to interconnect "stand-alone"instruments (digital multimeters,frequency counters,etc.)to each other and to computers. A bus is usually considered to have a set of unbroken signals lines that carry digital data in parallel(rather than serial)fashion;instruments are connected by "tapping into"the bus at various locations. Communication Standards: 1.RS232(COM),RS485 2.USB(Universal Serial Bus) 3.Ethernet 4.IEEE1394(Firewire) 5.GPIB(IEEE-488.2)=General Purpose Interface Bus. 6.Parallel Port RF/Coaxial Connectors: BNC,SMA/SMB/SMC,TNC,N Type,etc. 16/18 11.8 Instrument connectivity Intemet application Corporate facility Remote manufacturing facility 00 Workstations,PCs= Ethernet GPIB-ENET/100 GPIB devices GPIB-ENET/100 GPIB devices Ethernet GPIB-ENET/100 GPIB devices Intranet application Figure 11.16 GPIB Data Transmission System11.8 Instrument connectivity z In addition to connecting sensors to various signal processing devices, we also often want to interconnect “stand-alone” instruments (digital multimeters, frequency counters, etc.) to each other and to computers. z A bus is usually considered to have a set of unbroken signals lines that carry digital data in parallel (rather than serial) fashion; instruments are connected by “tapping into” the bus at various locations. z Communication Standards: 1. RS232 (COM), RS 485 2. USB (Universal Serial Bus) 3. Ethernet 4. IEEE1394 (Firewire) 5. GPIB (IEEE-488.2) = General Purpose Interface Bus. 6. Parallel Port z RF/Coaxial Connectors: BNC, SMA/SMB/SMC, TNC, N Type, etc. 15/18 11.8 Instrument connectivity Figure 11.16 GPIB Data Transmission System 16/18