N9030A PXA ADC超量程检测

嗨Andy - 我们的状态寄存器位在条件转换为真时置1，在读取寄存器时清零。
如果条件转换为false，则仅再次设置寄存器，然后再次转换回true。
如果要查询条件而不是锁存寄存器，那么您将发送命令：“STAT：QUES：INT：COND？”状态条件位将始终显示当前状态，即使您之前已读过它;
但是，它不会让你知道状态寄存器过去发生的情况。
重申一下，当发生ADC过载时，当发送“STAT：QUES：INT：COND？”（等于寄存器中的第4位）时，将返回“16”。
如果在过载情况持续时继续查询，则总是看到16.如果过载消失，则会看到0.当过载重新出现时，您会看到16有关详细信息，请参阅PXA用户和程序员指南http：//
cp.literature.agilent.com/litweb/pdf/N9060-90027.pdf在第3-14页上，有一个状态子系统的图表。
问候 -



     以下为原文

  Hi Andy -

Our status register bits are set when the condition transitions to being true and are cleared when you read the register.  The register is only set again if the condition transitions to being false and then transitions back to true again.  If you want to query the condition and not the latching register, then you would send the command: “ STAT:QUES:INT:COND?” The status condition bit will always show you the current status even if you have previously read it; however, it won’t let you know if the condition happened in the past like the status register does.  

To reiterate, when an ADC overload occurs, “16” will be returned when you send “STAT:QUES:INT:COND?” which equates to bit 4 in the register. If you keep querying while the overload condition continues you always see the 16. If the overload goes away, you see 0. When the overload reappears, you see 16

For more information, please refer to the PXA User’s and Programmer’s Guide 
http://cp.literature.agilent.com/litweb/pdf/N9060-90027.pdf
On page 3-14 there is a chart of the status subsystem. 

Regards -

感谢快速响应 - 这正是我想要的......在一个稍微不同的话题 - 是否有任何计划改进PXA for WLAN上的自动量程算法。
在某些情况下，我可以减少衰减器设置（在自动调整之后），而不会使ADC过载并改善EVM测量（因为在较高衰减设置下噪声受限）。
谢谢你



     以下为原文

  Thanks for the quick response - that does exactly what I want....

On a slightly idfferent topic - are there any plans to improve the auto-ranging algorithm on the PXA for WLAN.  In several instances I can reduce the attenuator setting (after it has been auto-ranged) without overloading the ADC and improve the EVM measurement (since it was noise limited at the higher attenuation setting).  

Thanks

andy