E8357A硬盘预期寿命是多少

一些建议：1。确保任何E8357A或E8358A具有500 MHz或更高的CPU。
我们不能支持旧的266MHz CPU。
2.如果CPU有500MB的RAM会很好，但这可以单独处理3.不要太担心硬盘驱动器。
我们仍然有足够的40GB PATA驱动器，但您必须联系我们才能获得一个。
是的，它是一个标准的2.5英寸驱动器一旦你拿到一个，你可以随时克隆驱动器，以保持备用。
克隆到更大的驱动器也是可能的。
4.对于那些较旧的设备，最薄弱的环节不是硬盘驱动器，而是电源。
虽然替代品（有些）可用，但它们并不便宜。
5.如果您发现一个显示器已停机（但它与外接显示器配合使用），则有95％的可能性只是一个保险丝。
如果你走这条路，我们在这里为你提供支持。



     以下为原文

  Some advice:

1.  Make sure any E8357A or E8358A has a 500 MHz CPU or better.  We cannot support the older 266MHz CPU.
2.  It would be nice if the CPU had 500MB of RAM, but this can be dealt with separately
3.  Don't worry about the hard drive too much.  We still have plenty of 40GB PATA drives available, but you would have to contact us to get one.   Yes it is a standard 2.5 inch drive Once you get one, you can always clone the drive in order to maintain a spare.  Cloning to a bigger drive is also possible.
4.  For those older units, the weakest link is not the HDD, but is instead, the power supply.  While replacements are (somewhat) available, they are not cheap.
5.   If you find a unit with a dead display (but it works with an external monitor), there is a 95% chance it is just a fuse.

We are here to support you if you go this route.

我们还有几款旧款E8358A。
有非常慢的（266MHz AMD K6-2）。
我想知道266Mhz K6-2 CPU是否可以与500MHz交换？
我认为Ram只有66MB。
旧主板可以处理多少内存？
高清交换可能是最简单的，可能会提供良好的速度提升。
作为一般用途，网络分析仪仍然很好，所以我正在寻找一些低成本的方法。



     以下为原文

  We also have couple of the old E8358A. There are very slow (266MHz AMD K6-2). I wonder if the 266Mhz K6-2 CPU can be swapped with 500MHz?
I think that there is only 66MB of Ram. How much memory that old motherboard can handle? The HD swapping might be the simplest and probably give good speed boost.  
As a general purpose, Network Analyzer is still good so I am looking for some low cost approach.

是的，266可以被500替换......它是替代品。
但是，您很可能需要为它找到内存。
该CPU需要512MB内存，它所需的SODIMM非常具体。
有关详细信息，请参阅此链接：http：//na.tm.agilent.com/pna/FAQ1.html#G6这些SODIMMS通常可以在Ebay上找到，因为没有太多钱。
您将需要两个256MB模块。
是的，E8356A / 57A / 58A都是4个接收器VNA。
联系我关于266MHz CPU板...通过私人消息...不是我经常检查它。
我们可能有一个很好的解决方案。
作为一个历史（或歇斯底里）的说明，早在2000年，我试图说服他们为266MHz电路板添加超过64MB的内存。
这位负责人表示，在极少数情况下，这会超过一些缓存限制，而且当从硬盘驱动器获取数据时，更多内存实际上可能会降低CPU的速度。
这似乎反直觉，但他是负责人。
所以我们发售64MB即使128MB会使用户界面更快，并提供更好的用户体验。
基本上，为了为1％的客户节省几毫秒，我们用100％的用户界面设置了一个非常缓慢的用户界面。



     以下为原文

  Yes, the 266 can be replaced by the 500...it is a drop-in replacement.
However, you will most likely need to find memory for it.  That CPU requires 512MB of memory and the SODIMM it needs is very specific.  See this link for more info: http://na.tm.agilent.com/pna/FAQ1.html#G6   These SODIMMS can usually be found on Ebay for not too much money. You will need two 256MB modules.

Yes, the E8356A/57A/58A are all 4 receiver VNAs.

Contact me about the 266MHz CPU board...via private message...not that I check it very often.  We probably have a good solution for you.

As a historical (or hysterical) note, back in 2000, I tried to convince them to add more than 64MB of memory to the 266MHz board.  The person in charge stated that in some rare cases, that would exceed some caching limit and more memory could actually slow down the CPU as it fetched data from the hard drive.  This seemed counter intuitive, but he was the expert in charge.  So we shipped with 64MB even though 128MB would have made the user interface much faster and presented a much nicer user experience. Basically, in order to save a few milliseconds for 1% of our customers, we saddled 100% of them with a painfully slow user interface.

> {quote：title = Dr_Bob写道：} {quote}>问候安捷伦VNA论坛，>>我正在考虑购买二手的低端VNA。
我只需要适度的性能，最高可达6GHz左右。
我在我的价格/性能支架中确定了一对安捷伦型号，包括古老的8753ES-006或E8357A PNA。
我目前被E8357A吸引，因为它是一种更现代的仪器，具有LAN连接等。另外，我相信那些PNA是4接收器，因此能够TRL cal，而默认情况下8753系列只有3接收器。
（我不知道8753ES上的第4接收器是否可选，就像我自己的8720D上一样）。
考虑到使用过的PNA的价格并使用了8753ES，给我一个8753ES似乎是不明智的。
如果你足够麻烦经销商，那么PNA的价格大约是8000美元！
另外值得考虑的是FieldFox - 安捷伦在eBay上经常使用CertiPrime，并为您使用的PNA支付的价格提供合理的保修。
寻找卖家“agilentused”这是一个例子。
只需确保同意购买您实际购买时所需的选项，因为您将获得比以后支付选项更好的交易。
http://www.ebay.co.uk/itm/190957971367安捷伦在eBay上也有一个E8357A PNA。
http://www.ebay.co.uk/itm/181269200630一个建议是否从安捷伦以外的人那里购买。
同意价格，然后根据卖方将其发送到* Agilent *进行校准来提供报价，但您同意支付安捷伦校准的成本。
如果它没有通过校准，那么您需要退款，但如果通过，请安排将其从安捷伦发送给您。
那样你知道这个单位运作良好。
如果它没有校准，或者来自一个狡猾的第三方实验室，你就不知道它是否有问题。
一些经销商如何使用校准证书宣传VNA，这很有趣，但不会将它们发送给安捷伦。
我不为安捷伦工作，从来没有这样做过，但就个人而言，如果花费你用于PNA的那种钱，至少一次安捷伦校准它是值得的，所以你知道它是好的。
戴夫



     以下为原文

  > {quote:title=Dr_Bob wrote:}{quote}
> Greetings Agilent VNA forum,
> 
> I am considering purchasing a used low-end VNA. I only require modest performance up to around 6GHz. I have identified a couple  Agilent model in my price/performance bracket including the venerable 8753ES-006 or the E8357A PNA. I am currently drawn to the E8357A as it is a more modern instrument, has LAN connectivity etc

Also, I believe those PNAs are 4-receiver, so capable of TRL cal, whereas by default the 8753 series is only 3 receiver. (I don't know if a 4th receiver is optional on an 8753ES, like it is on the 8720D I own). 

Given the price of used PNAs and used 8753ES, it would seem unwise to get an 8753ES to me. PNAs can be had for around $8000 if you hassle a dealer enough, and play one against the other! 

Also worth considering is a FieldFox - Agilent often have CertiPrime ones on eBay with a decent warranty for the price you will pay for a used PNA. Look for the seller "agilentused" 

Here is an example. Just make sure to agree to buy the options you want when you actually buy the unit, as you will get a better deal than paying for the options later. 

http://www.ebay.co.uk/itm/190957971367

Agilent also have a E8357A PNA on eBay. 
http://www.ebay.co.uk/itm/181269200630

One suggesting if buying from someone other than Agilent. Agree a price, and then make the offer conditional on the seller sending it to *Agilent* for calibration, but you agree to pay the cost of the Agilent calibration. If it fails the cal, then you want your money back, but if it passes, arrange for it to be shipped from Agilent to you. That way you know the unit works well. If it has no calibration, or one from a dodgy 3rd party lab, you have no real idea if it is faulty or not. It is funny how some dealers advertise VNAs with cal certificates, but wont send them to Agilent. 

I don't work for Agilent, and never have done, but personally if spending the sort of money you will for a PNA, it is worth getting it calibrated by Agilent once at least, so you know it is good. 

Dave

非常感谢你的回复。
好点 - 在PNA上真正的TRL校准的可能性肯定是有吸引力的，而不是3接收器8753允许的修改后的TRL。实际上你已经发现在eBay上使用的安捷伦PNA E8357A确实引起了我的兴趣。
我倾向于PNA，但磁盘让我感到紧张。
来自jvall的回应当然非常令人放心。
我也需要一个cal-kit :)我有一个以前用于8510A / B系统的85052A套件，但这是另一个线程的问题！
再次感谢。



     以下为原文

  Many thanks for the reply. 

Good point - the possibility of a true TRL cal on the PNA is certainly attractive rather than the modified TRL allowed by the 3 receiver 8753.

In fact you've spotted exactly the used Agilent PNA E8357A on eBay that spawned my interest in fact. I was leaning towards the PNA but the disk made me nervous. The response from jvall is certainly very reassuring.

I'll need a cal-kit too :) I have a 85052A kit previously used with an 8510A/B system but that's a question for another thread!

Thanks again.

> {quote：title = Dr_Bob写道：} {quote}>非常感谢你的回复。
>>好点 - 在PNA上真正的TRL校准的可能性肯定是有吸引力的，而不是3接收器8753允许的修改TRL。但是要检查“事实”。
我认为* PNA中有4个接收器，我相当肯定8753ES是3接收器，并且看起来不是4接收器选项。
>事实上，您已经在eBay上发现了使用过的Agilent PNA E8357A，这实际上引起了我的兴趣。
我倾向于PNA，但磁盘让我感到紧张。
来自jvall的回应当然非常令人放心。
这似乎是一个很好的单位。
可能有一个软件选项010（TDR）。
您可能会尝试协商安捷伦在完全不支持的基础上添加它 - 因为VNA不受支持。
>我也需要一个校准套件:)我有一个以前用于8510A / B系统的85052A套件，但这是另一个线程的问题！
快速浏览一下在http://cp.literature.agilent.com/litweb/pdf/85052-90011.pdf的85052A说明书显示系数从任何后来套件（85052B，85033D，85033E）的显著不同，所以
我怀疑你将不得不定义一个自定义工具包。
无论如何，坚持另一个线程。
戴夫>再次感谢。



     以下为原文

  > {quote:title=Dr_Bob wrote:}{quote}
> Many thanks for the reply. 
> 
> Good point - the possibility of a true TRL cal on the PNA is certainly attractive rather than the modified TRL allowed by the 3 receiver 8753.

But do check the "facts" on this. I *think* there are 4 receivers in the PNAs, and I'm fairly certain an 8753ES is 3 receiver and there does not look to be a 4-receiver option. 

> In fact you've spotted exactly the used Agilent PNA E8357A on eBay that spawned my interest in fact. I was leaning towards the PNA but the disk made me nervous. The response from jvall is certainly very reassuring.

That seems quite a nice unit. There is probably a software option 010 (TDR). You might try negotiating Agilent add that, on an entirely unsupported basis - since the VNA is unsupported. 

> I'll need a cal-kit too :) I have a 85052A kit previously used with an 8510A/B system but that's a question for another thread!

A quick look at the 85052A manual at

http://cp.literature.agilent.com/litweb/pdf/85052-90011.pdf

shows the coefficients are significantly different from any of the later kits (85052B, 85033D, 85033E), so I suspect you are going to have to define a custom kit. Anyway, stick that on another thread. 

Dave 

> Thanks again.