在哪里可以下载或购买HP 85721A？

所有8591C仪器都装在HP / Agilent中，其中安装了85721A CATV测量数据以及带有软件的存储卡，以便在必要时重新安装。
当然，多年来其中许多已经丢失。
不幸的是，HP / Agilent从未为用户提供下载软件或通过存储卡以任何其他方式将其加载到仪器中的方法，因此我无法想象您能够以这种方式恢复它。
我们也没有能力再提供替换卡，所以你唯一的希望就是来自第三方供应商，或者可能是论坛上有额外的人。
当然，这个CATV个性有很多不同的版本，因为世界上有许多不同的电视格式，大多数使用不同版本的85721A（NTSC，PAL，SECAM等......）所以要小心你
将要购买的东西...另一个可能的解决方案可能是联系您附近的安捷伦服务中心，看看他们是否可以为您装载它，因为他们可能仍然有一张卡片供您使用
当维修可能要求他们清除仪器的存储器时这样做。
最好的问候，迈克



     以下为原文

  All 8591C instrument shipped from HP/Agilent with the 85721A CATV measurement personality installed in them along with a memory card that had the software on it so that it could be reinstalled if necessary. Of course, over the years many of these have been lost.

Unfortunately HP/Agilent never provided a way for the user to download the software or load it into the instrument any other way that via a memory card, so I can't imagine you being able to restore it that way. We also don't have the ability to provide replacement cards any longer, so your only hope of getting one of these would be from a third party vendor or possibly someone here on the forum that has an extra. Of course, there are many different versions of this CATV personality, since there are many different TV formats around the world, and most use a different version of the 85721A (NTSC, PAL, SECAM, etc...) so be careful if you are going to purchase something...

Another possible solution may be to contact the Agilent service center near you to see if they might be able to load it for you if you were to send it into them, as they may still have a card for doing so when a servicing might require them to clear the memory of an instrument.

Best regards,
Mike