HP8594E规格看起来像YTO/YIG

嗨斯图尔特 - 我认为如果我根据你的要求开始一个新线程对其他人有帮助。
可以测量一些参数以查看YIG或YTO是否正常运行。
第一次检查是通过将可疑信号分析仪调谐到0 Hz中心频率和零扫宽来进行简单的零跨度检查。
取下YIG或YTO输出电缆。
这是一根应该进入第一台搅拌机的半刚性电缆。
YIG或YTO输出应调整到第一个I.F.
频带0，即3921.4 MHz。
功率电平应至少为+10 dBm，可能高达+16 dBm。
由于分析仪处于0跨度，因此YTO不应扫描，而是将调谐到此固定频率。
将优质电缆连接到YTO SMA输出连接器，并在功能正常的频谱分析仪上测量YTO输出。
如果检查结果正常，则YTO的整个范围为~3-7 GHz。
第一次检查仅测试一个频率的YTO功率。
8594E是一款3 GHz分析仪，因此从不使用YTO的整个范围。
具有多个频带的分析仪使用频带1中的整个YTO范围，其通常从~2.8GHz到6.5GHz。
对于94E，您可以设置9 kHz的起始频率和2.9 GHz的停止频率，并将仪器设置为慢扫描时间。
YTO的范围现在为9 kHz + 3921.4 MHz（3921.409 MHz）至2900 MHz + 3921.4 MHz（6821.4 MHz）。
使用Max的功能频谱分析仪。
保持跟踪功能，您可以检查YTO的平坦度和输出功率从2900 MHz到6821.4 MHz。
确保YTO输出相当平坦，并且在测试时没有电源孔或漏失。
如果平直度和功率水平测量正常，则YTO可操作。
我希望这有帮助 -



     以下为原文

  Hi Stuart -

I thought it would be helpful for others if I started a new thread with your request.

There are a few parameters that can be measured to see if the YIG or YTO is functioning properly.  The first check to perform is a simple zero span check, by tuning the suspect signal analyzer to 0 Hz center frequency and zero span.  Remove the YIG or YTO output cable.  This is a semi rigid cable that should go to the 1st Mixer.  The YIG or YTO output should be tuned to the 1st I.F. in band 0, which is 3921.4 MHz.  The power level should be at least +10 dBm, perhaps as high as +16 dBm.  Since the analyzer is in 0 span, the YTO should not be sweeping, but will be tuned to this fixed frequency.  Connect a good quality cable to the YTO SMA output connector and measure the YTO output on a functioning spectrum analyzer.  If this check is OK, the entire range of the YTO is ~3-7 GHz.  This first check is only testing the YTO power at one frequency.  

The 8594E is a 3 GHz analyzer and therefore the entire range of the YTO is never used.  Analyzers with multiple bands used the entire range of the YTO in band 1, which was typically from ~2.8 GHz to 6.5 GHz.  

For the 94E you can set a start frequency of 9 kHz and a stop frequency of 2.9 GHz and set the instrument to a slow sweep time.  The range of the YTO would now be 9 kHz + 3921.4 MHz (3921.409 MHz ) to 2900 MHz + 3921.4 MHz (6821.4 MHz).  With a functioning spectrum analyzer using the Max. Hold trace function, you can check the flatness and output power of your YTO from 2900 MHz to 6821.4 MHz.  Make sure the YTO output is fairly flat and that there are no power holes or dropouts as you test it.  If the flatness and power level measures OK, the YTO is operational.

I hope this helped -

嗨，谢谢你的快速回复，只是一些历史...... 8594E已经在阁楼里工作了几年而且工作得很好。
把它带下来，只是一个扁平线上电，尝试cal，但带回“UNCAL”错误SRQ110（？）所以看起来像硬件故障.. ??
检查校准信号并使用频率计确定。只需得到一条扁平线（有噪音！）并且没有0hz直流上升，看起来有点死！
通过手册，一切都指向A7模拟板，所以改变电解学，运行诊断工具所有OK -10volt不显示在显示屏底部！
但是在TP处测量它并显示-10v，所以可能显示这个。
主线圈和斜坡显示正常，但FM在10Mhz跨度处平坦。
不确定这是否是真正的考验..任何帮助都会感激不尽。
没有备件，成本限制。
享受故障查找，所以我只能继续我所拥有的...获得频谱分析仪喜欢让它再次工作，而不是出售它为“零件不工作”..我只有一个范围，sig gen和
频率计数器此刻工作所以资源非常少。
此致，斯图尔特。



     以下为原文

  Hi,

Thanks for the prompt reply, just some history..
8594E been in the loft for couple of years and worked fine. Brought it down and on power up just a flat line, tried to cal but came back with "UNCAL" error SRQ110(?) so looks like a hardware fault..?? Checked the cal signal and OK with a frequency counter.. Just get a flat line (With noise!) and no 0hz dc rise, something looks dead!

Went through the manual and everything kept pointing towards the A7 Analogue board so change Electrolytics out, ran the diagnostic tool all OK -10volt doesn't show at bottom of display! but measured it at the TP and show -10v, so maybe a display thisng .
Main coil and ramps show OK but FM flatline both at 10Mhz span. Not sure if that's a genuine test..

Any help would be grateful. No spares available, cost limitation. Enjoy fault finding, so I can only go on what I have...Get Spectrum analyser love to get it working again rather than have to sell it for "Parts Not working"..

I've only got a scope, sig gen and frequency counter to work with at the moment so resource is very little.

Regards,

Stuart.