GPIB-140 777997-01 777997-02 GPIB总线扩展器

NI GPIB- 140a(部件编号:777997-01,777997-02,777997-03,777997-04,777997-05和777997-06)是一种GPIB总线扩展器。该设备很容易消除电缆长度和设备负载相关的限制，这是由IEEE 488标准强制。GPIB-140A完全兼容IEEE 488.1和IEEE 488.2标准。根据IEEE 488标准，任何GPIB系统的总长度不能超过20m。一对这样的GPIB扩展器可以在不进行任何修改的情况下达到1公里的总距离，并且不会影响用户GPIB系统的完整性。

此GPIB扩展器可支持长达1公里的光纤电缆。NI GPIB- 140a带有缓冲传输技术，使该型号成为最快的GPIB总线扩展器之一。使用该模型，在HS488协议下操作时，用户可以实现超过2.8 mb的速度。这个GPIB Extender可以轻松部署，不需要额外的硬件。在典型情况下，计算机设备一端连接到电缆扩展器。在远端，GPIB仪器连接到类似的电缆扩展器。然后，两个电缆扩展器通过光纤电缆相互连接。

每个NI GPIB- 140a连续监测GPIB活动，并将GPIB信号转换成并行或串行信号传输到接收扩展器。接收扩展器接收来自发送扩展器的串行或并行信号并将其转换为IEEE 488信号。NI GPIB-140A不需要修改现有的软件应用程序，因为它是软件透明的。

GPIB-140A

The NI GPIB-140A (Part Numbers: 777997-01, 777997-02, 777997-03, 777997-04, 777997-05, and 777997-06) is a GPIB Bus Extender. This device easily eradicates the cable length and device loading related restrictions which are compulsory by the IEEE 488 standard. The GPIB-140A is fully compatible with IEEE 488.1 and IEEE 488.2 standards. As per the IEEE 488 standard, the total length of any GPIB system cannot exceed 20 m. A pair of these GPIB Extenders can reach a total distance of 1 km without any modifications and without affecting the integrity of the user’s GPIB system.

This GPIB Extender can support up to 1 km fiber-optic cable. The NI GPIB-140A comes with a buffered transfer technique, making this model one of the quickest GPIB Bus Extenders available. With this model, the user can achieve faster than 2.8 Mbytes while operating in the HS488 protocol. This GPIB Extender can be deployed with minimal effort does not require additional hardware. In typical scenarios, a computer device is connected to a cable extender on one end. On the far end, a GPIB instrument is connected to a similar cable extender. Both cable extenders are then interconnected via a fiber-optic cable.

Each NI GPIB-140A continuously monitors GPIB activity and translates GPIB signals into parallel or serial signals for transmission to the receiving extender. The receiving extender receives serial or parallel signals from the transmitting extender and converts them to IEEE 488 signals. The NI GPIB-140A does not necessitate modification in existing software applications because it is software transparent.