廉价DSO Hantek 6022BL说明书上没有的内容

刚刚入手一台国产的廉价的 DSO:Hantek 6022BL，怎奈官方文档“少的可以”，不得不拿起搜索引擎查阅其他用户的使用经验。整理/翻译在这里，备忘。

1.主面板前面的H/P按钮到底是干什么用的

参考页面：
http://www.eevblog.com/forum/testgear/hantek-6022be-20mhz-usb-dso/
官方说明书中只用2处提到了这个按钮，而且只说了一句无关痛痒的Button: press the button down to run hantek6022BE(hantek6022BL) software.（按钮：把这个按钮按下以使用hantek6022BE(hantek6022BL)软件）

找了半天，还是外国人摸出来的，原文如下

H – expose the device as a Hantek 6022BL to your computer (VID 04B4, PID 6560) and use the drivers installed from the CD
P – expose the device as a Saleae logic analyzer (VID 0925, PID 3881) and allow you to use the officialSaleae logic
analyzer software

·H - 把设备当作Hantek 6022BL展示给你的机器（设备管理器中的VID 04B4，PID 6560【注：我的设备在H模式下就不是这个VID】），使用随附CD中的驱动程序；
·P -把设备当作Saleae逻辑分析仪展示给你的机器（VID
0925, PID 3881），允许你使用官方的Saleae逻辑分析仪软件；

Don’t try to force the Hantek drivers on your 6022BL when it is set to P-mode. Just install the Saleae software and use that. If you want to use the analog probes and hence the Hantek software again, simply switch back to H-mode.

Hint: Although you can use the logic analyzer software from Hantek in H-mode I wouldhighly recommend switching to P-mode and using the Saleae software as it isway easier to handle and has very
handy features like highlighting and decoding of communication frames (SPI, I²C etc.). Also it does not feel as sluggish as the Hantek software. Go ahead, try it!

不要尝试在P模式下强制使用Hantek的那个驱动，此时应安装并使用Saleae的软件。如果你想用模拟探头进行模拟测试且实用Hantek自己的那个软件，你需要切回H模式。【注：笔者实测切换模式需要在6022BL断电的情况下进行，不然不管用】
提示：尽管你可以在H模式下使用Hantek自己的逻辑分析仪软件，我还是强烈推荐你切换到P模式并使用Saleae的软件，因为Saleae更容易操作，并且拥有一些非常方便的功能，如高亮和解码通信报文（SPI，I²C等）。并且Saleae给人感觉不像Hantek的软件那样反应迟钝。你自己试试吧！

2.外国论坛的评价摘要

参考页面：
http://www.eevblog.com/forum/testgear/hantek-6022be-20mhz-usb-dso/
负面评价：

Promising hardware and good build quality, but the software that comes with it is disappointingly shoddy, but far surpassed in terms of disappointment by the unit's real-world performance. As it is (broken acquisition at 5 us/div
and beyond) even basic use is only possible for signals of around 200 kHz or less. That's a full 1% of the advertized range!! Even where you CAN see the signal and trigger on it, triggering is unstable. Overall performance is downright horrible compared to
what Hantek claims it can do. So I would strongly recommend to stay away from it and get yourself something else for a few bucks more.

很好的硬件，做工也不错，但是随附软件非常让人失望，简直是次品——但这和其实测表现比起来还算不上什么。像这样（在5us/div以及更大的分辨率时的数据采集如此糟糕），其最基本的使用也只限于（低于）200kHz信号的测量，那可正好只有它所宣称的模拟带宽【注：20MHz】的1%！！就算你可以看清某个信号并由它触发，触发操作也是不稳定的。整体感觉是，和Hantek宣称的它能测的比起来是彻彻底底的一塌糊涂。因此我强烈建议别买这台示波器，多出点血，买别的（更好的）型号。

正面评价：

In summary. This DSO  will meet my needs for checking computer power rails for noise but it is not useful in trying to find a glitch in a large capture of signals. Not junk though. I am pleasantly surprised.

Basic ? Very !

Good software ? NO ! The hardware quality far exceeds that of the software.

Accurate ? It appears to be accurate enough for most basic tasks.

Trigger ? Satisfactory.

Noise ? 5-10mV.

Memory ? Virtually unuseable

Value for money ? You decide. It can be purchased for around US$70.

What this thing needs is to be supported in the Open Source software that has been developed for Hantek's more expensive DSO's.

简而言之，这台DSO可以满足我检查计算机的电源轨上的噪声的需要，但是对于从很多捕获的信号中寻找毛刺电压就没什么用了。尽管如此，这台示波器还不至于被称为“垃圾”，我感到几分惊喜。

基础吗？太基础了！

软件不错？才没有！硬件的质量远好于软件的质量

准确？对于大多数简单的任务来说足够了

触发？还算让人满意

噪声？5-10mV的样子

存储？事实上用不了

值多少？你说了算，70美刀就可入手。【注：现在买的话肯定没有70美刀了】

这玩意需要的是开源软件的支持，就像Hantek出品的其他更贵的DSO那样。