E8257中的艾伦偏差

大家好，我使用248GHz的E8257和非常稳定的10 MHz外部参考（H-maser）进行了allan偏差测量。
该曲线遵循短期区域中的thau-1趋势，但在100和100秒之间变得平坦且相对较高。
我没有在E8257文档中找到任何长期稳定性规范（带外部参考）。
谁可以帮我这个事？
E8257足够稳定，可以进行这种测试吗？
提前致谢。
何塞



     以下为原文

  Hi all,

I have performed an allan deviation measurement using E8257 at 24GHz, and a very stable 10 MHz external reference (H-maser).

The curve follows a thau-1 trend in the short term region, but becomes flat and relatively high between thau 100 and 100sec.

I don't find any long term stability specs (with external reference) within the E8257 documentation.

Can anyone help me on this? Is the E8257 stable enough to do this sort of tests?

Thanks in advance.
Jose