vrf HP8562A参考振荡器

RE：vrf HP8562A Ref oscillatorChris，这是一种相当琐碎的方式，需要很少的设备，并且工作在WWV（NIST或NBS的无线电台，如前所述）的范围内。
设置可以接收WWV的天线。
使用5,10或20 MHz。
____Setup__使用接收器或频谱分析仪作为测量设备。在输入端放置一个“T”。将天线放在T.的一侧。另一侧使用步进衰减器（如HP 355和355D）。连接
要校准到焊盘的10 MHz xtal。
___Procedure________设置垫到最大值。将测量设备调到10 MHz，或者，如果使用20 MHz WWV，则调整为20 MHz。如果使用频谱分析仪，则使用最小RF衰减。快速减少焊盘，直到Xtal信号和WWV（或其谐波）大致为止
等于。
是的，一个人将随着气氛而改变，但是这是OKAdjust Xtal osc的单位被调整，直到2个信号足够接近你能够检测到一个对另一个的跳动。调整零拍，或尽可能接近你
保罗-----原始消息-----来自：Chris Phipps [mailto：chris.phipps@analog.com]发送时间：2002年4月12日星期五下午12:28致：Vrf（电子邮件）
主题：vrf HP8562A Ref oscillatorHi All那里有人可以告诉我如何更改/调整8562A频谱分析仪的10MHz参考。
这是一个旧的，所以我们没有得到校准，现在有点远离规格.HopefullyChris --------------------------
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     以下为原文

  RE: vrf HP8562A Ref oscillatorChris,Here is a way that is fairly trivail and requires little equipment and works in the range of WWV (the radio station of NIST or NBS as it was previously known). Set up an antenna that can receive WWV. Use 5, 10, or 20 MHz.        ____Setup__Use a receiver or spectrum analyzer as the measuring device.Place a "T" on the input.Put the antenna one one side of the T.Put a step attenuator (such as an HP 355 and 355D) on the other side.Connect the 10 MHz xtal out of the unit to be calibrated to the pads.         ___Procedure________Set pads to maximum value.Tune measuring device to 10 MHz, or, if using 20 MHz WWV, then 20 MHz.Use minimum RF attenuation if using spectrum analyzer.Slowly decrease pads until the Xtal signal and WWV (or harmonics thereof) are roughly equal.        YES, one will be changing with atmospherics, but that's OKAdjust Xtal osc of unit being adjusted until the 2 signals get close enough for you to be able to detect the beating of one against the other.Tune for zero beat, or as close as you can get.Paul-----Original Message-----From: Chris Phipps [mailto:chris.phipps@analog.com]Sent: Friday, April 12, 2002 12:28 PMTo: Vrf (E-mail)Subject: vrf HP8562A Ref oscillatorHi AllIs there anyone out there who can tell me how to change/tune the 10MHzreference of the 8562A spectrum analyser. It is an old one so we don't getit calibrated and it is now a bit far off of specification.HopefullyChris---------------------------------------------------------------------This is the "vrf" maillist, managed by Majordomo.  To send messages tothis maillist, just email to "vrf@lvld.agilent.com".  Subscriptions andunsubscriptions are done through the address "vrf-request@lvld.agilent.com".If you need details, just send a message containing the text "help"to "vrf-request@lvld.agilent.com".---------------------------------------------------------------------