电线电缆网 > 数据 高频线缆 > SATA串音问题（完整版）
SATA串音问题 - 无图版
ivwmyd --- 2008-03-29 17:13:32
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各位大虾
你们的SATA串音能通过测试吗？能过的线规＼长度是多少？
文科生 --- 2008-03-30 08:44:24
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SATA 串音好過的,最 難的是skew.26awg正常過1米. 28awg 60mm .30 awg 30~40mm.
Denny1980 --- 2008-03-31 09:15:43
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同意,難過的是skew,經常不過
ivwmyd --- 2008-04-01 20:29:53
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我司有一樣品，130mm，其它都過，就是串音在4000Mhz開始就NG掉了，不知你們是怎么加工的，要怎麼樣才好過？
我們用的是焊線式的插頭，外被去皮5mm，芯線去皮2mm左右，鋁箔去到外被脫皮口NG，鋁箔保留與芯線脫皮口平齊也NG掉。
AbelGuo --- 2008-04-02 17:04:27
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绞距是否稳定? 加工是否有影响到?
ivwmyd --- 2008-04-02 20:06:44
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ivwmyd --- 2008-04-02 20:09:28
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| SATA Attenuation summary result. | |||||||||||
| Start | Stop | Lim From | Lim To | Tx | Rx | ||||||
| 10 | 4500 | -6 | -6 | -3.25 | -2.88 | ||||||
| MHz | MHz | dB | dB | Pass | Pass | ||||||
| SATA NEXT summary result. | |||||||||||
| Start | Stop | Lim From | Lim To | Tx-Rx | |||||||
| 10 | 4500 | -26 | -26 | -18.92 | |||||||
| MHz | MHz | dB | dB | Fail | |||||||
| SATA Differential Mode Impedance summary result @ 70 ps, (Low:20 %, High:80 %) | |||||||||||
| Pair Num | Result | Spc Max | Spc Min | Max value | Min Value | △Value | Avg | Unit | |||
| Tx | Pass | 110 | 90 | 108.97 | 102.37 | 6.60 | 105.67 | Ohms | |||
| Rx | Pass | 110 | 90 | 109.6 | 102.6 | 7.00 | 106.1 | Ohms | |||
| SATA Common Mode Impedance summary result @ 70 ps, (Low:20 %, High:80 %) | |||||||||||
| Pair Num | Result | Spc Max | Spc Min | Max value | Min Value | △Value | Avg | Unit | |||
| Tx | Pass | 40 | 25 | 34.78 | 30.41 | 4.37 | 32.59 | Ohms | |||
| Rx | Pass | 40 | 25 | 34.82 | 29.94 | 4.88 | 32.38 | Ohms | |||
| SATA Pair Match Impedance summary result @ 70 ps, (Low:20 %, High:80 %) | |||||||||||
| Pair Num | Result | Spc Max | Max1 | Min1 | Max2 | Min2 | △Value | Unit | |||
| Tx | Pass | 5 | 54.39 | 50.44 | 55.21 | 51.3 | 4.77 | Ohms | |||
| Rx | Pass | 5 | 54.6 | 50.23 | 55.21 | 51.52 | 4.98 | Ohms | |||
ivwmyd --- 2008-04-02 20:10:18
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| SATA Mated Connector Impedance summary result @ 70 ps, (Low:20 %, High:80 %) | |||||||||||
| Pair Num | Result | Spc Max | Spc Min | Max value | Min Value | △Value | Avg | Unit | |||
| Tx | Pass | 115 | 85 | 109.82 | 91.49 | 18.33 | 100.65 | Ohms | |||
| Rx | Pass | 115 | 85 | 110.6 | 90.26 | 20.34 | 100.43 | Ohms | |||
| SATA Intra Pair Skew summary result @ 70 ps, (Low:20 %, High:80 %) | |||||||||||
| Pair Num | Result | Spc Max | Value | Unit | |||||||
| Tx | Pass | 10 | -7.52 | ps | |||||||
| Rx | Pass | 10 | -6.91 | ps | |||||||
| SATA Differential Mode Risetime summary result @ 30 ps, (Low:20 %, High:80 %) | |||||||||||
| Pair Num | Result | Rise Spc | Degra Spc | Rise V | Degra V | Unit | |||||
| Tx | Pass | 85 | N/A | 61.21 | N/A | ps | |||||
| Rx | Pass | 85 | N/A | 61.51 | N/A | ps | |||||
| Eye Diagram summary result | |||||||||||
| Pair Num | Result | ||||||||||
| Tx | Pass | ||||||||||
| Rx | Pass | ||||||||||
ladeng305 --- 2008-04-02 22:03:23
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大哥:
有相关规范的，能不能赐给小弟一份?
新手，见笑了!!!
AbelGuo --- 2008-04-03 09:10:01
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flf9835 --- 2008-04-03 14:10:10
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ivwmyd --- 2008-04-03 23:12:25
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因我司产品的结构原因,MOLDING后插头无法插入高频治具,所以直拉焊完线测试的,后来经人指点,必须做成成品,也就是MOLDING后再去测试.把MOLDING后的产品打魔成可以插入治具的样子再去测试,还真过了,不过只做了一PC的测试,下周一再试个8到9PCS.
多谢各位,雷工,你明天过来不?
野狼 --- 2008-05-14 13:26:11
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810707 --- 2008-05-14 15:12:13
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1.屏蔽不要剥得太长。
2.焊接时注意焊点大小要均匀，太尖和太粗都会有影响。
waterzou --- 2008-07-27 19:24:22
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xiaolaoshu --- 2008-12-13 23:14:20
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leoleeson --- 2008-12-18 12:34:11
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针对此一问题,建议如下:
(1).SATA STP结构破坏的距离越短,所得到的特性会越好. (Impedance及NEXT都会变好)
(2).破坏之STP结构,想办法回覆回原来的STP或替代方案.
(3).针对Skew问题,必须从Cable的源头开始著手, SATA cable製程中检验相当的重要.
UTECH --- 2009-06-24 10:28:23
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广意通讯 --- 2009-09-26 13:55:49
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user1984 --- 2009-10-19 16:31:01
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SKEW芯线制程中从线径、同心度、导体均匀性控制
包带过程中可以从物理长度来控制
zhl --- 2009-10-19 18:26:00
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广意通讯:
还有对绞的节距也很重要
扁平线需要对绞吗?
andy7812 --- 2009-10-20 09:20:17
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maryma888 --- 2009-12-02 16:34:30
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1.屏蔽不要剥得太长, 只要到insulation 平就好了!
2.焊接时注意焊点大小要均匀，太尖和太粗都会有影响。 3.要用發泡pe 的，這個圖片的材質不對也!
晨曦1394 --- 2009-12-02 18:17:43
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newtopp --- 2009-12-02 22:16:26
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dowent --- 2009-12-04 19:31:23
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ruosen --- 2010-01-24 11:01:44
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线材加工段注意屏蔽遗留长度，串音应该好改善的
广意通讯 --- 2010-02-05 12:37:22
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还是节距要考虑周全些。
XIFUWANG --- 2010-04-27 20:03:50
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