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在2600A系列数字源表中，对内存读取速率的最大测量值增加了两倍，必定需要更多的读数缓冲存储器。除了增加2600A系列数字源表[1]的内部数据缓冲存储器，还需要添加前部面板USB端口，以便于用户访问更多的内存。为了满足存储需求，用户现在可以从多种数据存储设备中进行选择，不限于2600A系列数字源表的内存分配。

The 2× increase of the maximum measurement to memory reading rate in the Series 2600A is sure to demand more reading buffer storage. In addition to increasing the internal reading buffer storage on the Series 2600A, a front panel USB port was added to facilitate user access to more memory. Users can now select from a variety of data storage devices in order to meet their memory requirements without being limited by the Series 2600A’s internal memory allotment.

在最初的2600系列数字源表中，在专用读数缓冲区(smua.nvbuffer1、smua.nvbuffer2、smub.nvbuffer1以及smub.nvbuffer2)中的仪表数据自动保存至非易失性内存中。2600A系列数字源表需要在专门读数缓冲区调用保存数据的专门功能。利用smuX.savebuffer功能将读数缓冲区保存至内存或USB存储器件中。利用smuX.savebuffer功能指定文件名与格式(.csv or .xml)，存储至USB存储设备中。在没有任何参数情况下调用smuX.savebuffer功能时，缓冲区保存至2600A系列数字源表内部的非易失性内存中。

With the original Series 2600s， instrument data in dedicatedreading buffers (smua.nvbuffer1， smua.nvbuffer2， smub.nvbuffer1， and smub.nvbuffer2) was automatically saved tonon-volatile memory. Series 2600A instruments require a specificfunction call to save data in dedicated reading buffers. Use thesmuX.savebuffer function to save reading buffers to internalmemory or to a USB memory device. Specify a filename andformat (.csv or .xml) with the smuX.savebuffer function tostore to USB memory device. When smuX.savebuffer is calledwithout any parameters， the buffer is saved to the Series 2600Ainternal nonvolatile memory.

同2600系列数字源表相比，2600A系列数字源表[2]的读数缓冲区还具有不同的基础时间戳。2600A系列数字源表的基础时间戳是从1970年1月1日12:00开始的以秒为单位数字。³而2600系列数字源表的读数缓冲区，其基本时间戳是从仪表上电开始的以秒为单位的数字。

Series 2600A reading buffers also have a different basetimestamp than reading buffers in Series 2600 instruments. Thebase timestamp for Series 2600A instruments is in number ofseconds from 12:00 AM January 1， 1970.3 For Series 2600 readingbuffers， the base time stamp is the number of seconds since theinstrument was powered on.

3 从时间戳要素来看，读数缓冲区的基本时间戳是不同的。基本时间戳是存储在读数缓冲区的第一个读数的实时基准。读数缓冲区的时间戳属性是一个时间戳排列，读数缓冲区的每个读数单位都是秒。这些时间戳是相对于基本时间戳的。因此，在缓冲区存储的第一个读数的时间戳始终是0秒。

3 The base timestamp of the reading buffer is different from timestamps element. The base timestamp is a real-time reference for the first reading stored in the reading buffer. The timestamps attribute of the reading buffer is an array of timestamps, in seconds for each reading of the reading buffer. These timestamps are relative to the base timestamp. Therefore, the timestamp for the first reading stored in the buffer is always zero seconds