如何解读测试报告

下面是USB3.0的测试报告,如何解读?每一项是什以意思?

1	.-USB3.0 NA Insertion Loss
2	.-USB3.0 NA NEXT
3	.-USB2.0 to USB3.0 NA FEXT
4	.-USB3.0 NA Differential to Common Conversion
5	.-USB2.0 NA Insertion Loss
6	.-USB2.0 to USB3.0 NA NEXT
7	.-USB3 Super High Speed Cable Impedance
8	.-USB3.0 Super High Speed Mated Impedance
9	.-USB3.0 Super High Speed Delay
10	.-USB3.0 Super High Speed Intra Pair Skew
11	.-USB3.0 High Speed Cable Impedance
12	.-USB3.0 High Speed Delay
13	.-USB3.0 High Speed Intra Pair Skew

USB3.0 NA Insertion Loss summary result.
Start	Stop	Lim From	Lim To	SSRX	@(MHz)	SSTX	@(MHz)
100	1250	-1.5	-5	-3.54	1228.5	-3.53	1228.5
1250	2500	-5	-7.5	-5.53	2486.5	-5.33	2412.5
2500	7500	-7.5	-25	-15.42	7407.5	-14.93	6778.5
MHz	MHz	dB	dB	Pass		Pass
USB3.0 NA NEXT summary result.
Start	Stop	Lim From	Lim To	SSRX-SSTX	@(MHz)	SSTX-SSRX	@(MHz)
100	2500	-32	-32	-39.65	2431	-37.32	2468
2500	3000	-32	-23	-39.42	2523.5	-38.18	2523.5
3000	7500	-23	-23	-29.63	7296.5	-28.8	6852.5
MHz	MHz	dB	dB	Pass		Pass
USB2.0 to USB3.0 A Side NA FEXT summary result.
Start	Stop	Lim From	Lim To	USB2-SSRX	@(MHz)	USB2-SSTX	@(MHz)	SSRX-USB2	@(MHz)	SSTX-USB2	@(MHz)
100	2500	-21	-21	-36.87	2209	-36.45	2431	-37.03	2264.5	-36.21	2431
2500	3000	-21	-15	-35.52	2745.5	-35.71	2634.5	-36.32	2727	-35.88	2801
3000	7500	-15	-15	-36.51	3060	-34.04	6889.5	-37.24	3097	-34.34	6889.5
MHz	MHz	dB	dB	Pass		Pass		Pass		Pass

USB3.0 NA Differential to Common Conversion summary result.
Start	Stop	Lim From	Lim To	SSRX	@(MHz)	SSTX	@(MHz)
100	7500	-20	-20	-22.8	2412.5	-22.63	2560.5
MHz	MHz	dB	dB	Pass		Pass
USB2.0 NA Insertion Loss summary result.
Start	Stop	Lim From	Lim To	USB2	@(MHz)
1	1	-0.2	-0.2	-0.08	1
4	4	-0.39	-0.39	-0.16	4
8	8	-0.57	-0.57	-0.21	8
12	12	-0.76	-0.76	-0.25	12
24	24	-0.95	-0.95	-0.45	24
48	48	-1.35	-1.35	-0.56	48
96	96	-1.9	-1.9	-0.79	96
200	200	-3.2	-3.2	-1.13	200
400	400	-5.8	-5.8	-1.72	400
MHz	MHz	dB	dB	Pass

USB2.0 to USB3.0 A Side NA NEXT summary result.
Start	Stop	Lim From	Lim To	USB2-SSRX	@(MHz)	USB2-SSTX	@(MHz)	SSRX-USB2	@(MHz)	SSTX-USB2	@(MHz)
100	2500	-21	-21	-22.03	1339.5	-22.63	1173	-22.08	1339.5	-22.68	1173
2500	3000	-21	-15	-28.2	2967.5	-28.3	2949	-28.39	2967.5	-28.32	3000
3000	7500	-15	-15	-21.25	4114.5	-21.45	3985	-21.23	4170	-21.58	3985
MHz	MHz	dB	dB	Pass		Pass		Pass		Pass

USB3 Super High Speed Cable Impedance summary result @ 200 ps, (Low:10 %, High:90 %)
Pair Num	Result	Spc Max	Spc Min	Max value	Min Value	△Value	Avg	Unit
SSRX	Pass	103.5	76.5	88.89	88.14	0.75	88.51	Ohms
SSTX	Pass	103.5	76.5	87.08	86.62	0.46	86.85	Ohms
USB3.0 Super High Speed Mated Impedance summary result @ 50 ps, (Low:20 %, High:80 %)
Pair Num	Result	Spc Max	Spc Min	Max value	Min Value	△Value	Avg	Unit
SSRX	Pass	125	75	98.17	85.04	13.13	91.6	Ohms
SSTX	Pass	125	75	94.66	83.59	11.07	89.13	Ohms
USB3.0 Super High Speed Mated Impedance summary result (Reverse) @ 50 ps, (Low:20 %, High:80 %)
Pair Num	Result	Spc Max	Spc Min	Max value	Min Value	△Value	Avg	Unit
SSRX	Pass	125	75	97.01	84.31	12.70	90.66	Ohms
SSTX	Pass	125	75	93.61	85.38	8.23	89.5	Ohms

USB3.0 Super High Speed Delay summary result @ 200 ps, (Low:10 %, High:90 %)
Pair Num	Result	Spc Max	Value	Unit
SSRX	Pass	5.2	4.9664	ns/m
SSTX	Pass	5.2	5.0054	ns/m
USB3.0 Super High Speed Intra Pair Skew summary result @ 200 ps, (Low:10 %, High:90 %)
Pair Num	Result	Spc Max	Value	Unit
SSRX	Pass	15	-1.8	ps/m
SSTX	Pass	15	-10.2	ps/m
USB3.0 High Speed Cable Impedance summary result @ 200 ps, (Low:10 %, High:90 %)
Pair Num	Result	Spc Max	Spc Min	0.60 ns	2.10 ns	△Value	Avg	Unit
USB2	Pass	103.5	76.5	89.69	89.67	0.02	89.68	Ohms
USB3.0 High Speed Delay summary result @ 200 ps, (Low:10 %, High:90 %)
Pair Num	Result	Spc Max	Value	Unit
USB2	Pass	26	10.0338	ns
USB3.0 High Speed Intra Pair Skew summary result @ 200 ps, (Low:10 %, High:90 %)
Pair Num	Result	Spc Max	Value	Unit
USB2	Pass	100	-25.92	ps

LZ 这个些好多好多的  

这是一份用佳烨公司提供的软件测试出来的测试报告。感觉有点问题，第一页第11-13项应该把3.0改成2.0，这样直观一点，因为后面的测试结果本来就是2.0线对的。以下是第一页的中文意思：

1	.-USB3.0 NA Insertion Loss	3.0线对插入损耗
2	.-USB3.0 NA NEXT	3.0线对之间的NA近端串音
3	.-USB2.0 to USB3.0 NA FEXT	2.0线对与3.0线对之间的NA远端串音
4	.-USB3.0 NA Differential to Common Conversion	差分转共模
5	.-USB2.0 NA Insertion Loss	2.0线对插入损耗
6	.-USB2.0 to USB3.0 NA NEXT	2.0与3.0线对之间的NA近端串音
7	.-USB3 Super High Speed Cable Impedance	3.0线对特性阻抗
8	.-USB3.0 Super High Speed Mated Impedance	3.0线对的连接头阻抗
9	.-USB3.0 Super High Speed Delay	3.0线对的延迟
10	.-USB3.0 Super High Speed Intra Pair Skew	3.0线对的对内延时差
11	.-USB3.0 High Speed Cable Impedance	2.0线对特性阻抗
12	.-USB3.0 High Speed Delay	2.0线对延迟
13	.-USB3.0 High Speed Intra Pair Skew	2.0线对对内延时差

后面的几页是这些参数的具体测试结果，这个线还不错！能用NA测试串音通过的USB3.0线材还是比较少的。尤其是MICRO头的，更难过的了！

这个我也见过是用佳烨的软件来测试的，因为他是先测试USB3.0的相关参数，然后再测USB2.0那一对，这个如果有亲自测试应该很清楚。

谢谢8楼的讲解,总算明白了一点

测试数据如何解读?还有测试图形如何看和分析?

佳烨测试软件我也没用过，只是见过比较多。其实测试软件都是大同小异，毕竟他们所依据的标准都是一样的。测试的原理和测试所用的仪器都差不多！下面选用最长的那个测试结果说明一下：

USB2.0 to USB3.0 A Side NA FEXT summary result.
Start	Stop	Lim From	Lim To	USB2-SSRX	@(MHz)	USB2-SSTX	@(MHz)	SSRX-USB2	@(MHz)	SSTX-USB2	@(MHz)
100	2500	-21	-21	-36.87	2209	-36.45	2431	-37.03	2264.5	-36.21	2431
2500	3000	-21	-15	-35.52	2745.5	-35.71	2634.5	-36.32	2727	-35.88	2801
3000	7500	-15	-15	-36.51	3060	-34.04	6889.5	-37.24	3097	-34.34	6889.5
MHz	MHz	dB	dB	Pass		Pass		Pass		Pass

这是测的2.0线对与3.0线对之间的远端串音测试结果概要。首先要搞清楚3.0线对有2对，分别叫SSRX和SSTX。其中第一和第二竖行是按照测试规范设定的几个频率段。第三和第四竖行讲的是在各个频率下的最低标准。第五行是指的2.0线对与SSRX线对之间在各频率段下的离标准线最差的点的值，是用2.0线对作为发射端测试的结果。第六行是指第五行的几个数据所对应的频率点，也就是说是在这几个频率点下测得第五行的几个最差值。后面几行的意思都一样，只是选用的对数不同。

你需要登录才能发表，点击登录。