嗨Jas - 请使用附件，对噪声源进行手动模式测量。
1）+所以我可以用rm temp的标准安捷伦噪声源校准N8975A，通过观察它实际测量我的未知噪声源的ENR？+使用手动模式可以测量Phot和Pcold值
噪音源。
ENR将为Phot（dB） - Pcold（dB）。
在所附文件中，Phot为13.896dB。
Pcold为0.143 dB，13.896 - 0.143 = ENR为13.753 dB。
2）+如果未知噪声源放置在80摄氏度（323.15k）的热板上，并且使用已知噪声源进行校准并且rm温度为303k，我可以正确测量未知源的ENR吗？
我是否必须进行任何计算以消除校准和实际测量之间的温差？+噪声源的ENR将增加10log [Tplate / Treference]。
由于温度升高，T板= 323.15°K和干扰= 303°K = 0.279 dB ENR增加。
请记住，这里讨论的主题是噪声源的ENR。
测量的总体不确定性中的另一个关键参数是ENR不确定性。
NFA不会测量此参数。
为了对N2002A进行测量，需要使用带有金标准噪声源的噪声源测试装置。
问候 -
以上来自于谷歌翻译
以下为原文
Hi Jas -
Please use the attached document to make a Manual Mode measurement of the noise source.
1) +So I can actually cal N8975A with the standard Agilent noise source at rm temp and by looking at the Phot it actually measure ENR of my unknown noise source?+
Using Manual Mode will allow you to measure the Phot and the Pcold values of a noise source. The ENR will be Phot(dB) – Pcold (dB). In the attached document the Phot was 13.896 dB. Pcold was 0.143 dB, 13.896 – 0.143 = ENR of 13.753 dB.
2) +What if the unknown noise source is place at a hot plate of 80 degree C (323.15k), and the calibration using the known noise source was done and rm temp 303k, Can I measure the ENR of the unknown source correctly? Do I have to do any calculation to remove the temp different between calibration n actual measurement?+
The ENR of the noise source will increase by 10log [ Tplate/Treference ]. Tplate = 323.15°K and Treference = 303°K = 0.279 dB increase in ENR because of increased temperature. Please keep in mind that the topic of discussion here is the ENR of a noise source. Another key parameter in the overall uncertainty of a measurement is the ENR uncertainty. An NFA does not measure this parameter. In order to make this measurement the N2002A, Noise Source Test Set with a gold standard noise source would be required.
Regards -
附件
嗨Jas - 请使用附件，对噪声源进行手动模式测量。
1）+所以我可以用rm temp的标准安捷伦噪声源校准N8975A，通过观察它实际测量我的未知噪声源的ENR？+使用手动模式可以测量Phot和Pcold值
噪音源。
ENR将为Phot（dB） - Pcold（dB）。
在所附文件中，Phot为13.896dB。
Pcold为0.143 dB，13.896 - 0.143 = ENR为13.753 dB。
2）+如果未知噪声源放置在80摄氏度（323.15k）的热板上，并且使用已知噪声源进行校准并且rm温度为303k，我可以正确测量未知源的ENR吗？
我是否必须进行任何计算以消除校准和实际测量之间的温差？+噪声源的ENR将增加10log [Tplate / Treference]。
由于温度升高，T板= 323.15°K和干扰= 303°K = 0.279 dB ENR增加。
请记住，这里讨论的主题是噪声源的ENR。
测量的总体不确定性中的另一个关键参数是ENR不确定性。
NFA不会测量此参数。
为了对N2002A进行测量，需要使用带有金标准噪声源的噪声源测试装置。
问候 -
以上来自于谷歌翻译
以下为原文
Hi Jas -
Please use the attached document to make a Manual Mode measurement of the noise source.
1) +So I can actually cal N8975A with the standard Agilent noise source at rm temp and by looking at the Phot it actually measure ENR of my unknown noise source?+
Using Manual Mode will allow you to measure the Phot and the Pcold values of a noise source. The ENR will be Phot(dB) – Pcold (dB). In the attached document the Phot was 13.896 dB. Pcold was 0.143 dB, 13.896 – 0.143 = ENR of 13.753 dB.
2) +What if the unknown noise source is place at a hot plate of 80 degree C (323.15k), and the calibration using the known noise source was done and rm temp 303k, Can I measure the ENR of the unknown source correctly? Do I have to do any calculation to remove the temp different between calibration n actual measurement?+
The ENR of the noise source will increase by 10log [ Tplate/Treference ]. Tplate = 323.15°K and Treference = 303°K = 0.279 dB increase in ENR because of increased temperature. Please keep in mind that the topic of discussion here is the ENR of a noise source. Another key parameter in the overall uncertainty of a measurement is the ENR uncertainty. An NFA does not measure this parameter. In order to make this measurement the N2002A, Noise Source Test Set with a gold standard noise source would be required.
Regards -
附件
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