E8491B

Keysight E8491B HP Agilent IEEE-1394 PC Link to VXI

The Keysight HP Agilent E8491B is ideal for data acquisition applications transporting huge data blocks. This model is economical for test applications, especially when it is combined with Agilent’s E84XX mainframe series. When dealing with more than one VXI mainframe, an E8491B is inserted into every mainframe, then connected through the cable. They can be connected in a star, tree, or daisy-chain arrangement. A PC can support a maximum of 16 mainframes.

The model has a maximum data transfer rate of 14 MB/sec (16 bit or 32 bit), the maximum backplane burst rate is 13 MB/sec (16 bit), 27 MB/sec (32 bit), or 53 MB/sec (64 bit), and the maximum cable length is 4.5 inches between devices and 72 m total per system. The shared memory capacity for this model is 128 kB.

The Keysight E8491B has a C-size VXI Slot 0 module, along with a 4.5-meter cable. The IEEE-1394 portion of the E8491B model’s title references a high-speed serial bus. This is a new standard for sending data between consumer electronics and PCs. The data is sent through a set of twisted-pair cables; the remaining twisted-pair set is used for the clock. The IEEE-394’s affordability and simple to use interface are possible through simplified electronics. The receivers and transmitters are capable of taking care of addressing, initialization, protocol, and arbitration. Sending data through the IEEE-394 can be achieved as Asynchronous or Isochronous. These two varieties can occur on a single bus. The E8491B supports asynchronous data sending to safe identical access for every VXI mainframe.