怎么使用vsg 2920和vsa 2820生成单载波

实际上我正在使用矢量信号发生器2920和矢量信号分析器2820以及signalmeister软件，我想使用我在matlab中模拟的程序生成单载波信号（PSK），首先我将它转换为IQ导入然后将其转换为arb
文件，然后发送它VSG 2920，我正在调整IQ导入中的采样率，就像我在matlab程序中一样，假设我正在使用脉冲整形滤波器（RRC）和overamling = 5MHZ，所以我调整采样率
在IQ导入到5MHZ，但我有问题。问题是，我没有得到正确的带宽，应该是2 *（1 + alpha / 2 * Ts），我不知道为什么????我猜
我的程序是对的，我在matlab中的propram成功运行，你对这个错误的带宽有什么想法吗？谢谢，



     以下为原文

  Actually I'm using Vector signal generator 2920 and Vector signal analyzer 2820 along with signalmeister software, I want to generate single  carrier signal (PSK) using my program which I simulate in matlab, first I loade it to IQ import then convert it to arb file then send it VSG 2920,I'm adjusting the sample rate in IQ import as I have in my matlab program ,lets say I'm using pulse shaping filter (RRC) with oversamling=5MHZ,so i'm adjusting the sample rate in IQ import to 5MHZ but I have aproblem.
The problem is ,I'm not getting the right bandwidth which supposed to be 2*(1+alpha/2*Ts),I don't know why????
I guess my procedure is right ,and my propram in matlab run succesfully,do you have any idea behind this wrong bandwidth?
Thanks,