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我们有测试夹具软件可以完美地控制Agilent 35670A，以测量300Hz至3kHz频段内的音频纹波（电平的最大变化）。
它大约有220条迹线。 47秒（显示屏上大约1.5次完全扫描）它漂亮而光滑并通过我们的规格。 当我通过B2357B使用Keysight（OPT AY2）（认为它只是重新打上品牌）时，测量结果会“下降”，导致我们的测试装置现在总是失败。 我是DSA的新手，但需要知道可能导致此问题的硬件/软件/命令/默认设置的差异。 我们发现Agilent / HP 35665的前代型号只是略有问题，因为它在更新扫描时慢了几毫秒，但我们对两种型号都进行了测试，并确保旧型号至少能达到99％的通过率 。 即，500次运行中不超过5次失败。 我似乎记得我们在35665上有2或3个故障而在35670上没有。我们曾经在实验室中有两个仪器，我们重复了35665和33670两个更新率设置为1.也许显示器 与计算FFT的时间相比，图形更新消耗大量时间。 20150603_144502.jpg2.8 MB 以上来自于谷歌翻译 以下为原文 We have test jig software that controls the Agilent 35670A perfectly to measure audio ripple(max variation in level) over a band of 300Hz to 3kHz. It does 220 traces in approx. 47 seconds (approx 1.5 full sweeps across the display) Its nice and smooth and passes our spec. When I use Keysight (OPT AY2) (thought it was just re-branded) via B2357B the measurements have "dips" resulting in our testjig always failing the products now. I'm fairly new to DSA's but need to know please the difference in hardware/software/commands/default settings that may cause this please. We found the predecessor model a Agilent/HP 35665 was only slightly problematic in that it was a few milliseconds slower in updating a sweep, but we ran the test for both models and ensured that the older model would at least give a 99% pass rate. I.e no more than 5 failures out of 500 runs. I seem to recall we had either 2 or 3 failures on the 35665 and none on the 35670. We used to have 2 instruments of each in labs and we repeated for both 35665’s and both 33670’s The update rate is set to 1. Perhaps the display graphical updates consume a significant time compared to the time to compute an FFT. 附件
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软件提取可能有助于显示用于扫描DSA的命令的值（请从下面的Delphi代码中提取相关信息，它包含在SCPI命令中）DSASweepFrequency：= 300;
SweepHigh_dB：= - 99; SweepLow_dB：= 99; AT_PhonesAutomationTestPanel.IncInternalStep; AT_PhonesAutomationTestPanel.ContinueTest; 结束; 14：开始// DSA - 以扫描频率设置和读取标记DSA_SetReadMarkerGPIBTestComponent.GPIBCommandCollection.Items [0] .InputParameters：= IntToStr（DSASweepFrequency）; DSA_SetReadMarkerGPIBTestComponent.StartAutomaticTest; 结束; 15：开始//获取最高和最低值SweepValue_dB：= StrToFloat（DSA_SetReadMarkerGPIBTestComponent.ResultList.Strings [1]）+ StrToFloat（DSA_SetReadMarkerGPIBTestComponent.ResultList.Strings [0]）; 如果SweepHigh_dB SweepValue_dB则SweepLow_dB：= SweepValue_dB; DSASweepFrequency：= DSASweepFrequency + 100; 如果DSASweepFrequency> 3300则开始SweepValue_dB：= Abs（SweepLow_dB） - Abs（SweepHigh_dB）; DetailForm.AP_PhonesRipplePanel.Caption：= FloatToStrF（SweepValue_dB，ffFixed，6,2）+'dB'; SweepValue_dB：= StrToFloat（FloatToStrF（SweepValue_dB，ffFixed，6,2））; 如果SweepValue_dB 以上来自于谷歌翻译 以下为原文 Software extract that may help show values for commands used to sweep the DSA (please extract relevant info from Delphi code below, it wraps to SCPI commands) DSASweepFrequency := 300; SweepHigh_dB := -99; SweepLow_dB := 99; AT_PhonesAutomationTestPanel.IncInternalStep; AT_PhonesAutomationTestPanel.ContinueTest; end; 14 : begin //DSA - Set and Read Marker at Sweep Frequency DSA_SetReadMarkerGPIBTestComponent.GPIBCommandCollection.Items[0].InputParameters := IntToStr(DSASweepFrequency); DSA_SetReadMarkerGPIBTestComponent.StartAutomaticTest; end; 15 : begin //Get Highest and Lowest Values SweepValue_dB := StrToFloat(DSA_SetReadMarkerGPIBTestComponent.ResultList.Strings[1]) + StrToFloat(DSA_SetReadMarkerGPIBTestComponent.ResultList.Strings[0]); if SweepHigh_dB SweepValue_dB then SweepLow_dB := SweepValue_dB; DSASweepFrequency := DSASweepFrequency + 100; if DSASweepFrequency > 3300 then begin SweepValue_dB := Abs(SweepLow_dB) - Abs(SweepHigh_dB); DetailForm.AP_PhonesRipplePanel.Caption := FloatToStrF(SweepValue_dB, ffFixed, 6, 2) + ' dB'; SweepValue_dB := StrToFloat(FloatToStrF(SweepValue_dB, ffFixed, 6, 2)); if SweepValue_dB <= Limits[20].LimitMax then |
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hjfsywer 发表于 2018-9-26 07:22 我建议您使用本页右上角的“联系专家”链接，并致电您附近的Keysight联络中心，以获取有关此问题的帮助... Mike 以上来自于谷歌翻译 以下为原文 I would recommend that you use the "Contact an Expert" link at the upper right of this page and call the Keysight contact center near you for help with this issue... Mike |
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谢谢他们刚刚带我去他们的南非经销商，所以我必须在那里跟进。 以上来自于谷歌翻译 以下为原文 Thanks they have just directed me to their South African distributer so I have to follow it up there. |
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