Hi, Agilent guru on M8190A,
I just got 2 of M8910As (product version 2) to replace original version 1 unit. I was trying to generate multiple tone signals from M8190As. But I always got unwanted multiple products of signals around my desired signals with freq. offset 20.8KHz (for 312,000 sample length), or 2.08KHz for 3,120,000 sample length. Even if I loaded all "1" to channel 1 and "0" to channel 2, I still got the same problem. Sometimes it didn't show up and the signals were very clean. But most of time it happened, on both of my units.
I didn't get this problem with my version 1 unit.
I have thought of and checked ref signal, sampling signals from internal (which always has +/1 270Hz signals around from "Sample Clock out" port) and rebooted PC and M8190A (and driver) many times, but couldn't find even a workaround!! Very frustrated!!
FYI, I am using C# to generate the DAC values and load to the unit with IVI driver. But like I said, even loading "1" and "0" will cause the same problem. I am almost coming to the conclusion that the hardware has the problem.
Your timely help is truly appreciated!!!
Ray
I just got 2 of M8910As (product version 2) to replace original version 1 unit. I was trying to generate multiple tone signals from M8190As. But I always got unwanted multiple products of signals around my desired signals with freq. offset 20.8KHz (for 312,000 sample length), or 2.08KHz for 3,120,000 sample length. Even if I loaded all "1" to channel 1 and "0" to channel 2, I still got the same problem. Sometimes it didn't show up and the signals were very clean. But most of time it happened, on both of my units.
I didn't get this problem with my version 1 unit.
I have thought of and checked ref signal, sampling signals from internal (which always has +/1 270Hz signals around from "Sample Clock out" port) and rebooted PC and M8190A (and driver) many times, but couldn't find even a workaround!! Very frustrated!!
FYI, I am using C# to generate the DAC values and load to the unit with IVI driver. But like I said, even loading "1" and "0" will cause the same problem. I am almost coming to the conclusion that the hardware has the problem.
Your timely help is truly appreciated!!!
Ray
Really appreciate it if anyone can help!
Ray
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