E8357A Phaselock丢失错误

您好，我有一个PHASELOCK LOST错误。
我让机器在水中死机并修复了电源;
我不确定错误是否相关。
似乎存在所有电源电压（除了9VDC的状态未经测试...没有原理图或电源扩展板可用）。
UUT从大约11 MHz到205 MHz都可以。
其他一切都是噪音。
我在2 GHz处的端口1处有大约0 dBm的电源输出，根据文档，这表明信号源正常，问题出在A11 Phaselock板上。
我做了一个操作系统恢复，问题仍然存在。
接收机测试显示A，B，R1和R2均匀下降约70 dB。
我的固件是A.07.50.67;
我曾尝试过早期的固件。
有一件事很奇怪：在6ms扫描速率下，UUT扫描然后在开始新扫描之前挂起6秒（CPU似乎在延迟期间挂断）。
更改BW或点数不会影响扫描速率。
此外，串行总线测试在每次测试中挂起约60秒。
机器上的串行总线测试与文档SB测试不同。
对此的任何想法也将受到赞赏。
感谢任何见解，Rick



     以下为原文

  Hello,

I have a PHASELOCK LOST error.  I got the machine dead in the water and repaired the power supply; I am not sure if the error is related.  All supply voltages seem to be present (except the status of the 9VDC is untested...no schematics or Power Supply extender board available).

The UUT is OK from about 11 MHz to 205 MHz; everything else is noise.  I have about 0 dBm power out at port 1 at 2 GHz which, according to the documentation, indicates that the source is OK and that the problem is in the A11 Phaselock board.  I did a Operating System Recovery, problem still there.

The receiver test shows A, B, R1, and R2 uniformly down about 70 dB.  My firmware is A.07.50.67; I have tried earlier firmwares.

One thing that is strange: with a 6ms sweep rate, the UUT sweeps then hangs up for 6 seconds before starting a new sweep (the CPU seems to hang up during the delay).  The sweep rate is not affected by changing the BW or number of points.

Also, the serial bus test hangs up about 60 seconds into each test.  The serial bus test on the machine doesn't resemble the documentation SB test.  Any thoughts on that would be appreciated as well.

Thanks in advance for any insights,
Rick