HP 83640A低频段10MHz至2.4GHz频率误差

嗨DominiqueB-当83640A切换到低频段，10 MHz到2.4 GHz时，通过使用100 MHz参考信号对YO进行外差来获得频率。
您的设备可能已经丢失了低频段组件的100 MHz参考信号，或者低频组件本身存在YP与100 MHz参考信号混合的问题。我希望这有助于 -



     以下为原文

  Hi DominiqueB -

When the 83640A is switched to low band, 10 MHz to 2.4 GHz, the frequency is derived by heterodyning the YO with the 100 MHz reference signal.

Your unit has probably lost the 100 MHz reference signal to the low band assembly, or the low band assembly itself has a problem where the YP is mixed with the 100 MHz reference signal.

I hope this helped -

嗨Tabbott，感谢您的回答。来自A7参考的100MHz 0dBm是好的，并且很好地到达了集团A24低频段的输入。
所以频率合成很好......但低频段A24似乎有问题。
是否可以打开这个块并检查里面的元素？是否有任何文件与这个Low Band元素相关？感谢您的帮助。欢呼，DominiqueB。



     以下为原文

  Hi Tabbott,

Thanks for your answer.
The 100MHz 0dBm coming from A7 reference is good and arrives well at the input of the bloc A24 Low Band. So the frequency synthesis is fine ... but the Low Band A24 seems to have problem.
Is it possible to open this block and check the elements inside ?
Is there somewhere any documents related to this Low Band element ?
Thanks for your help.
Cheers,

DominiqueB.

亲爱的，有了故障排除指南，我继续研究。
奇怪的是，在没有任何硬件修改的情况下，我现在在运行Selftest Full时收到错误消息：“+失败：RF低频段调谐电压 - 参考修理手册段落RF.000 +”“+ V - 调谐mV：测量： - 201mV最小值：
- 11000mV最大值： - 400 mV +“并且：”+失败269.000 RF：低频带锁定检查+“”+ HTE未锁定+“并且，当发生器工作时，如果我在10MHz和2.3GHz之间编程CW，我收到消息”+
解锁（HET解锁）+“。
我今天在这里，我将继续探索手册，但如果没有原理图，这并不容易。
我非常有兴趣了解* A24低频模块*（5086-7463）内部的信息，以及*获取A20接口板原理图*。
实际上，故障排除手册将这两个元素作为可能的故障元素集中在一起。
我很想知道*什么意思是“HTE”*，以及哪个板（或模块）位于故障PLL。
我没有在手册中找到这个。
任何信息都会非常受欢迎。
非常感谢你的帮助。
DominiqueB。
编辑：DominiqueB于2012年8月10日上午7:33编辑：DominiqueB于2012年8月10日上午7:39



     以下为原文

  Dear all,

Having got the Troubleshooting Guide, I went ahead on the research.

Strangely, without any hardware modification, I get now an error message when running the Selftest Full : 

" +Failed : RF Lowband Tuning Voltage - Refer Repair manual Paragraph RF.000+"
" +V - Tune mV  : Meas : - 201mV   Min : - 11000mV   Max : - 400 mV+"

And :

" +Failed 269.000 RF : Lowband Locked Check+"
" +HTE Unlocked+"

And, when the generator is working, if I program a CW between 10MHz and 2.3 GHz, I get the message "+Unlock (HET Unlock)+".

Here I am today, I will continue exploring the manuals, but it's not easy without the schematics. I would be very interested to have information on *what is there inside the A24 Low Band module* (5086-7463), and as well *to get the schematic of the A20 Interface board*. Actually, the Troubleshooting Manual focus onto these two elements as a possible faulty elements.
I would be interested to know *what means "HTE"*, and in which board (or module) is located the faulty PLL. I didn't found this in the manuals.

Any information will be really welcome. Thanks a lot for your help.

DominiqueB.

Edited by: DominiqueB on Aug 10, 2012 7:33 AM

Edited by: DominiqueB on Aug 10, 2012 7:39 AM

亲爱的DominiqueB我刚从我的83640遇到了同样的错误消息，并在两年前发现了你的帖子。
我想知道你是否终于找到了解决方案。
如果你能给我一个提示，我会很高兴的。
df2fq



     以下为原文

  Dear DominiqueB

I just encountered the same error message from my 83640 and found your post from two years ago. I am wondering if you finally found a solution. I would be happy if you could give me a hint.

df2fq

嗨df2fq，是的，问题通过交换HET模块解决了。
该模块覆盖10MHz至2GHz的低频。
该模块有自己的调平，因此交换后无需任何调整。
在我的情况下，水平和平坦度立即好。
请注意，此模块在所有版本A，L，B和所有型号中都相同，包括用作VNA源的单位。
我以非常合理的价格在着名的美国海湾找到了更换模块。
交流很容易。
最好是获得一个工作模块而不是维修，例如美国公司提供的模块。
维修成本巨大且可靠性差。
看起来这些模块非常具体，不易修复。
如果您需要更多信息，请与PM联系。
干杯，多米尼克B.



     以下为原文

  Hi df2fq,

Yes, problem solved with the exchange of the HET module. This module cover the low frequency's from 10MHz to 2GHz. The module has its own leveling, so after exchange, no need of any adjustment. In my case, the level and flatness have been good immediately.
Note this module is identical in all the versions A, L, B and for all models, including the units used as source for VNA's.
I have found the replacement module on the famous US Bay at very fair price. Exchange is easy. It's better to get a working module instead of repair such as offered by a company in the US. Cost of repair is huge and reliability poor. It seems these modules are very specific and not repairable easily.
If you need some more infos, contact me by PM.
Cheers,

DominiqueB