网分出现警告, CAUTION: VTO-OVER RANGE

今天用网分检验， 屏幕突然出现红字：
CAUTION: VTO-OVER RANGE
请有经验的同志指点一下，这是怎么回事？谢谢！

 

有人知道吗？
CAUTION: VTO OVER-RANGE (红字显示的警告）
我们很着急，不知是怎么解决，烦请专业人士帮忙。  

 

很明显你们很着急，却不知道要查VNA的说明书。
The VTO summing amplifier board has an output called LENDRA (Low = END of RAnge) that is sent to the Agilent 85102 IF detector over the test set interconnect cable. This indicates to the Agilent 85101 display processor whether or not the VTO is outside of its normal operating frequency range. Should the VTO exceed its normal operating range, the network analyzer will respond by displaying the running error message, VTO OVER-RANGE. This message will not be seen in the 8510C. It has been replaced by PRETUNE FAILED.

http://cp.literature.agilent.com/litweb/pdf/08511-90073.pdf

 

EDATOP大哥的精神值得我们学习！

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