[问答]

怎么使用接收器D在PNA-X中进行源功率校准

问答对人有帮助，内容完整，我也想知道答案 0 嗨，我正在使用PNA-X N5242A来测试我的DUT。我在3.1 GHz到3.5 GHz的频率范围内从PNA的端口3（使用Trace S43）产生脉冲RF信号。我使用RF电缆（比如“* Tx电缆”）将PNA的端口3连接到我的DUT。 “ Tx Cable ”在指定的频率范围内损失约8 dB。我在10％DUT周期配置脉冲宽度10uSec。源Pow校准设置：容差输入为0.1dBm Max。读数是20我必须将RF脉冲信号@ 2dBm馈送到DUT，所以我使用PNA的接收器D进行Tx电缆末端的源功率校准。校准正在通过。现在主要有两个问题：1。当我将Tx电缆连接到频谱分析仪以检查指定频率的DUT功率电平时，频谱分析仪显示的功率电平从0.5dBm变化到1.6dBm。这是因为我正在检查频谱分析仪的功率水平还是PNA无法正确执行源功率校准？ 2.当我检查峰值功率计（PPM）的功率水平时。我在PNA中将扫描点更改为1，以信号频率生成RF脉冲信号，然后将Tx电缆连接到PPM。 PPM显示-2dBm峰值功率。是不是因为我将扫描点从201改为1。以上来自于谷歌翻译以下为原文 Hi, I am using PNA-X N5242A for testing my DUT. I am generating pulsed RF signal from Port 3 (using Trace S43) of PNA in frequency range of 3.1 GHz to 3.5GHz. I am using a RF cable (say "Tx cable") to connect Port 3 of PNA to my DUT. "Tx Cable" has loss of around 8 dB in the specified frequency range. I am configuring pulse width 10uSec at 10% DUT cycle. source Pow calibration Setting:* Tolerance in is 0.1dBm Max. Number of Readings is 20 I have to fed RF pulsed signal @ 2dBm to DUT, so I am doing source power calibration upto the end of Tx Cable using receiver D of PNA. calibration is getting passed. Now there is mainly two issues: 1. when I am connecting the Tx cable to spectrum analyzer to check the power level at DUT in the specified frequency, Spectrum analyzer is showing power level varying from 0.5dBm to 1.6dBm. Is it happening because I am checking power level at spectrum analyzer or PNA is not able to perform source power calibration correctly? 2. When I am checking the power level at Peak power meter (PPM). I am changing sweep points to 1 in PNA to generate RF pulsed signal at signal frequency then I am connecting Tx Cable to PPM. PPM is showing the -2dBm peak power. Is it happening because I am changing sweep points from 201 to 1. 0
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答案对人有帮助，有参考价值 0 > {quote：title = RVV写道：} {quote}>嗨，>>我正在使用PNA-X N5242A来测试我的DUT。我在3.1 GHz到3.5 GHz的频率范围内从PNA的端口3（使用Trace S43）产生脉冲RF信号。我使用RF电缆（比如“* Tx电缆”）将PNA的端口3连接到我的DUT。 “ Tx Cable ”在指定的频率范围内损失约8 dB。 >我在10％DUT周期配置脉冲宽度10uSec。 > source Pow calibration设置：> Tolerance in为0.1dBm> Max。读数为20>要以脉冲功率进行校准，您应该1）关闭脉冲模式但ALC水准模式为OPEN LOOP并进行源功率校准2）保持脉冲模式开启但使用平均功率传感器并添加传感器损失因子来说明占空比的变化。 >我必须将RF脉冲信号@ 2dBm馈送到DUT，所以我使用PNA的接收器D进行Tx电缆末端的源功率校准。 >校准正在通过。 >>现在主要有两个问题：> 1.当我将Tx电缆连接到频谱分析仪以检查指定频率的DUT功率电平时，频谱分析仪显示的功率电平从0.5dBm变化到1.6dBm。这是因为我正在检查频谱分析仪的功率水平还是PNA无法正确执行源功率校准？ >您需要手动触发或将VNA设置为CW以在SA上进行测量，否则扫描VNA将导致SA读数不佳。 > 2.当我检查峰值功率计（PPM）的功率水平时。我在PNA中将扫描点更改为1，以信号频率生成RF脉冲信号，然后将Tx电缆连接到PPM。 PPM显示-2dBm峰值功率。是不是因为我将扫描点从201改为1.很难说。在回扫期间，电源可能会再次打开，因此您确实需要将扫描类型设置为CW模式以检查电源。最好是使用方法1），在脉冲前检查电源，然后打开脉冲模式。以上来自于谷歌翻译以下为原文 > {quote:title=RVV wrote:}{quote} > Hi, > > I am using PNA-X N5242A for testing my DUT. I am generating pulsed RF signal from Port 3 (using Trace S43) of PNA in frequency range of 3.1 GHz to 3.5GHz. I am using a RF cable (say "Tx cable") to connect Port 3 of PNA to my DUT. "Tx Cable" has loss of around 8 dB in the specified frequency range. > I am configuring pulse width 10uSec at 10% DUT cycle. > source Pow calibration Setting:* > Tolerance in is 0.1dBm > Max. Number of Readings is 20 > To calibrate in pulsed power, you should either 1) turn pulse mode off but ALC leveling mode to OPEN LOOP and do the source power calibration 2) leave pulse mode on but use an average power sensor and add a sensor loss factor to account for the duty cycle change. > I have to fed RF pulsed signal @ 2dBm to DUT, so I am doing source power calibration upto the end of Tx Cable using receiver D of PNA. > calibration is getting passed. > > Now there is mainly two issues: > > 1. when I am connecting the Tx cable to spectrum analyzer to check the power level at DUT in the specified frequency, Spectrum analyzer is showing power level varying from 0.5dBm to 1.6dBm. Is it happening because I am checking power level at spectrum analyzer or PNA is not able to perform source power calibration correctly? > You will need to manually trigger or set the VNA to CW to measure on an SA or the sweeping VNA will cause the SA to give poor readings. > 2. When I am checking the power level at Peak power meter (PPM). I am changing sweep points to 1 in PNA to generate RF pulsed signal at signal frequency then I am connecting Tx Cable to PPM. PPM is showing the -2dBm peak power. Is it happening because I am changing sweep points from 201 to 1. Hard to say. Again the power may turn on during retrace, so you really need to set the sweep type to CW mode to check the power. Best is to use method 1), check the power before pulsing, then turn pulse mode on.

2019-2-13 12:19:04 评论举报孔德羲