HP/Agilent跟踪发生器和漂移规格

当我完成将我的8596E精密基准调整到精确10MHz（通过ref-out和铷参考之间的时间差）时，当10MHz的跟踪发生器输出（零跨度）为10.02 MHz时，我的气泡爆裂。
我本可以发誓，我的旧E4401A（1.5GHz分析仪）是“点亮”并且天真地认为跟踪发生器已合成并锁定到参考。
我在另一个论坛上被用户告知TG可能由LO驱动，我也注意到对RBW的依赖。
感觉不好，我查看了许多HP / Agilent分析仪（85xx，ESA，PSA）的漂移规格，大多数情况下，它在5分钟内达到1.5kHz。
现在我感觉不是很糟糕，但TG不会成为我的精确来源（便宜的一面）。
如果有人能描述零跨度时的频率精度与影响它的其他SA参数之间的关系，那将是一个很大的帮助。
我意识到跟踪调整功能可能适用于大多数预期用途。
谢谢，Den



     以下为原文

  As I finished adjusting my 8596E precision reference to precisely 10MHz (via time delta between ref-out and a rubidium reference),  my bubble was burst when the tracking generator output (in zero span) at 10MHz was 10.02 something MHz.

I could have sworn that my old E4401A (1.5GHz analyzer) was "spot on" and naively assumed that the tracking generator was synthesized and locked to the reference.  I've been informed by users on another forum that the TG may be driven by the LO and I've also noticed dependency on RBW.

Feeling bad, I looked through drift specs on many HP / Agilent analyzers (85xx, ESA, PSA) and for the most part, it is 1.5kHz in 5 minutes.  Now I don't feel so bad but the TG is not going to be a precise source for me (being on the cheap side).

It would be a big help if someone could describe the relationship between the frequency accuracy when in zero span, and the other SA parameters which impact this.  I realize that the tracking adjusment function probably is adequate for most intended uses.

Thanks,
Den