N2894A是否与N287xA系列2.5mm配件兼容？

嗨，N2780A sereis的配件可以正常工作，但是当与3000X一起使用时，你不会得到700 MHz。
3000X在1M输入上具有500 MHz bw。
4000X显然在1M路径上有超过700 MHz（尚未检查出来）。
如果你真的想要1 GHz的SYSTEM bw（假设1 GHz范围）和良好的负载，那就得到一个N2795A se有源探头。
这些是非常好的和实际上低成本（〜$ 1k）。
所有示波器上的所有1M路径都是500 MHz，尽管这在任何地方都很常见。



     以下为原文

  Hi,

The accessories for the N2780A sereis will ineed work, but you won't get 700 MHz out of it when used with a 3000X.  The 3000X has 500 MHz bw on the 1M input.  The 4000X apparently has over 700 MHz on the 1M path (haven't had the cahnce to check that out yet).  if u really want 1 GHz of SYSTEM bw (assuming a 1 GHz scope) and good loading, get an N2795A se active probe.  These are very nice and realtively low cost (~$1k).

pretty much all 1M paths on ALL scopes are 500 MHz, though this is rearely mentioned anywhere.

好的，所以你不会从MSO3104X + N2894A的组合中获得700MHz，但是至少比N2873A（500MHz）有一些改进吗？
示波器的1Mohm 500MHz衰减将主要用于BW的整体确定，但BW的一部分还取决于探头特性。
所以我认为应该在500MHz到700MHz之间的某个地方，并且接近500MHz的一侧。
对？
我问的原因是我们正在升级3104X上的库存探测器以获得更好的被动探测能力。
N2873A是显而易见的选择，但由于N2984A现已上市，价格大致相同且尺寸相同，为什么不改用呢？
注意到N2894A探头包装是减去几个配件。
而且就我们而言，当我们需要1GHz的探头尖端时，我们已经有了一个有源探头。
对于N287x和N2894A而言，这是2.5mm直径和各种配件，这是最具吸引力的。编辑：MarkL于2012年11月15日下午9:07



     以下为原文

  Ok, so you wouldn't get 700MHz out of the combination of a MSO3104X + N2894A, but wouldn't there at least be some improvement over say the N2873A (500MHz)?

The scope's 1Mohm 500MHz rolloff will dominate in the overall determination of BW, but part of the BW is also dependent on the probe characteristics.  So I think it should land somewhere in between 500MHz and 700MHz, and closer to the 500MHz side.  Right?

The reason I'm asking is that we're upgrading the stock probes on a 3104X to get finer passive probing capability.  The N2873A was the obvious choice, but since the N2984A is now available and is about the same price and is identical size-wise, why not get it instead?

Noted that the N2894A probe package is minus a couple of accessories.  And to your point, we already have an active probe when we need 1GHz to the probe tip.  It's really the 2.5mm diameter and wide array of accessories for the N287x and N2894A that's most attractive.

Edited by: MarkL on Nov 15, 2012 9:07 PM

因此，对于500 MHz（1MOhm）通道上的500 MHz无源探头，有效示波器+探头系统3dB bw小于500 MHz。
当添加700 MHz无源探头时，结果应该接近500 MHz 3 dB系统bw。



     以下为原文

  so with a  500 MHz passive probe ona 500 MHz (1MOhm) channel, the effective scope + probe system 3dB bw is less than 500 MHz.  when the 700 MHz passive probe is added, the results shud be pertty darn close to 500 MHz 3 dB system bw.