8590A扫描显示问题

嗨，鲍勃有一个8592a有同样的问题。
第1屏幕是否让您在“CORR OFF”中显示相同的问题？
因此，在EEroms中8592A没有问题。
我已经通过“INIT EEROM”解决了菜单中的硬键和软键。
它可能会为您提供解决问题的方法。
BTW改为88到89 ROM的vv无法做任何伤害。
89 ROM的一小部分被编程以防止任何可能破坏EEROM内容的突击队员这也在手册中提到。
成功Ary PS我有更多信息来自alems@zeelandnet.nl 73 Ary编辑：PA0ALV于2016年3月7日1:09 PM编辑：PA0ALV于2016年3月7日下午1:11



     以下为原文

  Hi, Bob
Have had a same problem by a 8592a. 1st does the screen let you show the same problem with "CORR OFF" ?
So no the problem was by the 8592A in the EEroms .
I have solved by "INIT EEROM" folowing the hard and softkeys in the menu.
It may give you a way to solve the problem.
BTW change the 88 to 89 ROM's vv can't do any harm .
A small difference the 89 ROM's are programmed to prevent any commando that can destroy the content of the EEROM's
This is also mentioned in the manuals.

succes
Ary

PS I do have more info via alems@zeelandnet.nl
73
Ary

Edited by: PA0ALV on Mar 7, 2016 1:09 PM

Edited by: PA0ALV on Mar 7, 2016 1:11 PM

嗨Ary我尝试了CORR OFF，神奇地显示它应该是。
在我看来，这是一个硬件故障，因此取代了ADC。
希望ADC部件AD774BBD的信息似乎正常工作可能对其他开云(中国)官方用户有用。
所以似乎校准值已经搞砸了。
该手册涵盖了如何输入新的校准数据，只要我测量20dB衰减器平坦度误差，它本身就可以执行自校准。
非常聪明！
我仔细检查了两个分析仪上的299MHz参考值，其中一个很低，我无法将其修剪为精确的频率，所以我需要做一些工作。
非常感谢您对此的指导。
你知道EPROMS的大小吗？
它们看起来像2764但在设备上有HP代码。
短发



     以下为原文

  Hi Ary

I tried CORR OFF and magically the display is as it should be.
It seemed to me to be a hardware fault, hence the replacement of the ADC.
Hopefully the information on the ADC part, AD774BBD which does seem to work OK may be useful to other Forum users.

So it seems that the calibration values have been messed up. 
The handbook covers how to enter new calibration data as long as I measure the 20dB attenuator flatness errors it can perform a self calibration itself. Very clever!

I did carefully check the 299MHz reference on both analysers and one was low, I could not trim it to be exactly on frequency, so I need to do some work on that. 
Thank you very much for your guidance with this one.

Do you know the size of the EPROMS?  They look like 2764 but have a HP code on the devices.

Bob

嗨鲍勃，不幸的是我在网络空间丢失了一条消息。
喜欢的UV舞会是27c256。
或27c512。
为了摆脱我使用过的尖峰：频率-2001 HZ> CALL>（软键）更多1或2在这个区域你可以看到很多关于EROM内容的信息。
我使用过“INITEROM”，而且通过surprice，原始值仍然存在。
之后你必须调整频率和幅度。
这些尖峰是由错误导致的EROM输入不确定等导致的。即使是错误的callibration信号也会导致这些问题，因此EROM中的错误值写入错误。
299.9 MHz信号的频率必须与-20 dB完全相同。
这些结论由我自己和一个无线电朋友制作（它给了我们很多乐趣和5年的经验）！
手册中也提到了这种尖峰。
大多数这些评论都在手册中解释。
成功了



     以下为原文

  Hi Bob,

Unfortunally one of my message lost in cyberspace. hi
The UV proms are 27c256.  or 27c512.
To get rid of the spikes I have used :
FREQUENCY -2001 HZ > CALL > ( softkeys) MORE 1 or 2 In this area you can see a lot of info 
about EROM contents. 
I Have used "INITEROM", and by surprice the original values are still there.
After that you must callibrate frequency and amplitude.
These spikes are a result of uncertain inputs in the EROM caused by bugs etc.
Even a wrong callibration signal will cause these problems too so in the EROM's are written with wrong values.
The 299.9 MHz signal must have an exact niv of -20 dB also the frequency. 
These conclusion where made by myself and a radiofriend (it gives us a lot of fun and 5 year expirience) !
Also this spikes are mentioned in the manual.
Most of these remarks are explained n the manual.
success

Ary

嗨Ary感谢您关于EPROMS的信息。
我尝试过Initrom，它可以阻止尖峰。
不幸的是，分析仪显示输入，参考输入约为100MHz输出。
电源复位后，显示屏通常显示0Hz线，然后显示带谐波的参考信号。
我看到参考信号在它应该的位置左边一个分区但是没有0Hz线。此级别是10dB下降，可能是根据手册的混频器二极管。
我将尝试测量第一个LO并查看是否已经完成并通过设备工作。
目前，如果我尝试自动校准水平或频率，显示器会出现“校准信号不存在”，如果调音台损坏，可以解释为什么它认为校准信号不存在。
感谢您的帮助，我将在完成RF阶段后回复报告。
只需要更多的时间和耐心！
短发



     以下为原文

  Hi Ary

Thanks for the information on the EPROMS.
I have tried Initrom and it stops the spikes OK.
Unfortunately the analyser whilst it shows inputs and the reference input is about 100MHz out.
After power reset the display normally shows the 0Hz line and then the reference signal with harmonics.
I see the reference signal one division to the left of where it should be but no 0Hz line
Also the level is 10dB down and that may be the mixer diodes according to the handbook. 
I'll try to measure the first LO and see if that is out and work my way through the device.
At present if I try autocalibrate for level or frequency the display comes up with 'Cal signal not present' which if the mixer is damaged may explain why the it thinks the Cal signal is not there.

Thanks for all your help, I'll report back when I have worked through the RF stages.
Just need more time and patience!

Bob

嗨Ary第一台混合器中的一个二极管很短。
我已经用1N5711（Farnell）替换了混频器二极管，正如其他人所建议的那样，我买了20个，并用10MHz信号发生器，耦合电容器和高精度DMM构建了匹配的夹具，以测量器件作为整流器。
不确定这是最好的方法，但它给了我两个非常接近的设备，并使它们适合原始部件，显示器看起来更像你期望的。
交叉手指，按下频率校准并通过，然后尝试进行振幅校准，然后再次通过。
那么一个好的频谱分析仪！
我没有发现频率精度太高，它只有几兆赫的频率。
内部参考在我所拥有的任何一台分析仪上都不是很精确，虽然它是可调节的，但它在停止振荡之前不会接近299.9MHz。
水平是好的，我可以修剪它非常接近所述的数字。
我将尝试使用精确设置为预期频率和电平的信号发生器，然后再试一次。
我不是那么公平，你应该在尝试校准前给它两个小时。
顺便说一下。
我希望我的经验特别是ADC，这显然是原装和混频器二极管替代品的令人满意的替代品，这对其他人来说是鼓舞人心的。
安装二极管需要稳定的手，固定二极管的微小金属块将不能接受1N5711所具有的导线直径，因此我丢弃了这些块并小心弯曲了腿。
我有一个显微镜在工作，这是一个很好的帮助这类事情。
短发



     以下为原文

  Hi Ary
One of the diodes in the first mixer was short.

I have replaced the mixer diodes with 1N5711 (Farnell) as others suggested, I bought 20 and built up a matching jig with a 10MHz signal generator, coupling capacitors and a high accuracy DMM to measure the devices as rectifiers.
Not sure that is the best method, but it gave me two pretty close devices and fitting them in place of the original parts the display looked more like you would expect.
Crossing fingers, pressed frequency calibration and it passed, then tried with amplitude calibration, and again it passed.
So a good spectrum analyser!

I don't find the frequency accuracy too good, it's a couple of MHz off.
The internal reference is not very precise on either analyser I have, and although it is adjustable it will not get all that close to 299.9MHz before it stops oscillation.
Level is good, I can trim that to be quite close to the stated figure.

I'll try using a signal generator precisely set to the frequency and level it expects and try again. I was not being all that fair, you are supposed to give it two hours I think before attempting calibration.

Well on the way though.

I hope my experiences particularly with the ADC which plainly is a satisfactory replacement to the original and the mixer diode substitution are encouraging to others. Fitting the diodes needs a steady hand, the tiny metal blocks that hold the diodes will not accept the diameter of wire that the 1N5711 has so I discarded the blocks and carefully bent the legs to shape. I have a microscope at work which is a great help for this sort of thing.

Bob

嗨鲍勃，很高兴看到分析仪现在处于良好的状态，恭喜。
当然，对于混频器二极管来说，将它们安装在非常小的块中是没有用的。
我也和我的一样，丢弃块eso。
1.7287 GHz第二混频器频率可能有点乱。
所以这个问题可能是来自A7J3-3或第二LO频率的负偏压（-5V），由C4调整参见手册。
成功Ary



     以下为原文

  Hi Bob,

Fine to read that analysers were in a good shape now, congrats.
Sure about the mixer diodes it's no job to make them fitted in the very tiny blocks.
I did also the same with mine, discard the blocks eso.
It is possible the 1.7287 GHz second mixer frequency is a bit out of order.
So this problem can be the neg bias (-5V) from A7J3-3 or second LO frequency, tuned by C4 see manual.
Succes
Ary