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如何解讀測(cè)試報(bào)告

下面是USB3.0的測(cè)試報(bào)告,如何解讀?每一項(xiàng)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 這個(gè)些好多好多的  

這是一份用佳燁公司提供的軟件測(cè)試出來的測(cè)試報(bào)告。感覺有點(diǎn)問題，第一頁第11-13項(xiàng)應(yīng)該把3.0改成2.0，這樣直觀一點(diǎn)，因?yàn)楹竺娴臏y(cè)試結(jié)果本來就是2.0線對(duì)的。以下是第一頁的中文意思：

1	.-USB3.0 NA Insertion Loss	3.0線對(duì)插入損耗
2	.-USB3.0 NA NEXT	3.0線對(duì)之間的NA近端串音
3	.-USB2.0 to USB3.0 NA FEXT	2.0線對(duì)與3.0線對(duì)之間的NA遠(yuǎn)端串音
4	.-USB3.0 NA Differential to Common Conversion	差分轉(zhuǎn)共模
5	.-USB2.0 NA Insertion Loss	2.0線對(duì)插入損耗
6	.-USB2.0 to USB3.0 NA NEXT	2.0與3.0線對(duì)之間的NA近端串音
7	.-USB3 Super High Speed Cable Impedance	3.0線對(duì)特性阻抗
8	.-USB3.0 Super High Speed Mated Impedance	3.0線對(duì)的連接頭阻抗
9	.-USB3.0 Super High Speed Delay	3.0線對(duì)的延遲
10	.-USB3.0 Super High Speed Intra Pair Skew	3.0線對(duì)的對(duì)內(nèi)延時(shí)差
11	.-USB3.0 High Speed Cable Impedance	2.0線對(duì)特性阻抗
12	.-USB3.0 High Speed Delay	2.0線對(duì)延遲
13	.-USB3.0 High Speed Intra Pair Skew	2.0線對(duì)對(duì)內(nèi)延時(shí)差

后面的幾頁是這些參數(shù)的具體測(cè)試結(jié)果，這個(gè)線還不錯(cuò)！能用NA測(cè)試串音通過的USB3.0線材還是比較少的。尤其是MICRO頭的，更難過的了！

這個(gè)我也見過是用佳燁的軟件來測(cè)試的，因?yàn)樗�是先測(cè)試USB3.0的相關(guān)參數(shù)，然后再測(cè)USB2.0那一對(duì)，這個(gè)如果有親自測(cè)試應(yīng)該很清楚。

謝謝8樓的講解,總算明白了一點(diǎn)

測(cè)試數(shù)據(jù)如何解讀?還有測(cè)試圖形如何看和分析?

佳燁測(cè)試軟件我也沒用過，只是見過比較多。其實(shí)測(cè)試軟件都是大同小異，畢竟他們所依據(jù)的標(biāo)準(zhǔn)都是一樣的。測(cè)試的原理和測(cè)試所用的儀器都差不多！下面選用最長的那個(gè)測(cè)試結(jié)果說明一下：

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

這是測(cè)的2.0線對(duì)與3.0線對(duì)之間的遠(yuǎn)端串音測(cè)試結(jié)果概要。首先要搞清楚3.0線對(duì)有2對(duì)，分別叫SSRX和SSTX。其中第一和第二豎行是按照測(cè)試規(guī)范設(shè)定的幾個(gè)頻率段。第三和第四豎行講的是在各個(gè)頻率下的最低標(biāo)準(zhǔn)。第五行是指的2.0線對(duì)與SSRX線對(duì)之間在各頻率段下的離標(biāo)準(zhǔn)線最差的點(diǎn)的值，是用2.0線對(duì)作為發(fā)射端測(cè)試的結(jié)果。第六行是指第五行的幾個(gè)數(shù)據(jù)所對(duì)應(yīng)的頻率點(diǎn)，也就是說是在這幾個(gè)頻率點(diǎn)下測(cè)得第五行的幾個(gè)最差值。后面幾行的意思都一樣，只是選用的對(duì)數(shù)不同。

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