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電線電纜網(wǎng) > 數(shù)據(jù) 高頻線纜 > HDMI 1.4 眼圖與高頻報告分析求教.（完整版）

HDMI 1.4 眼圖與高頻報告分析求教. - 無圖版

IJXXIADX --- 2012-04-18 11:28:45
1

Dear all

前兩天我做了款成品HDMI 1.4 TYPE A 3m ,raw and nonnector 都是自己做的,盡然測試眼圖沒有過??? 貴司能過幾米?

測試raw的特性阻抗是ok的,5P都在100-105之間.

報告見后面

IJXXIADX --- 2012-04-18 11:30:43
2

	Parameter:			NA_Attenuation	Unit : dB/Cable	Result:	Pass
Start Freq	10	825	2475	4125				Pair
End Freq	825	2475	4125	5100				Status
Spec Max	--	--	--	--				↓
Pair 1	-4.501	-8.162	-12.05	-20.1				Pass
Pair 2	-4.663	-8.215	-13.38	-18.4				Pass
Spec Min	-5	-12	-20	-25
Worst Pair	Pair 2	Pair 2	Pair 2	Pair 1
Worst Freq	809.68	2294.8	3805.3	4693.8

IJXXIADX --- 2012-04-18 11:31:10
3

Parameter:

NA_NEXT

Unit : dB

Result:

Pass

Start Freq

Pair

End Freq

5000

Status

Spec Max

-26

↓

P 1-2

-37.16

Pass

Spec Min

Worst Pair

P 1-2

Worst Freq

4900.5

IJXXIADX --- 2012-04-18 11:31:52
4

Parameter:		TDR_CommonModeIMPZ		Unit : Ohm		Result:	Pass
Pair Name	Spec Max	Spec Min	Max Value	Min Value	Differ.	Average	Status
Pair 1	40	25	32.36	26.57	5.79	29.465	Pass
Pair 2	40	25	33.89	27.88	6.01	30.885	Pass

Parameter:		TDR_DifferialIMPZ		Unit : Ohm		Result:	Fail
Pair Name	Spec Max	Spec Min	Max Value	Min Value	Differ.	Average	Status
Pair 1	110	90	100.68	77.47	23.21	89.075	Fail
Pair 2	110	90	102.12	84.13	17.99	93.125	Fail

IJXXIADX --- 2012-04-18 11:33:25
5

Parameter:

TDR_ConnectorIMPZ

Unit : Ohm

Result:

Fail

Pair Name

Spec Max

Spec Min

Node 1

Node 2

Differ.

Average

Status

Pair 1

115

101.14

77.41

23.73

89.275

Fail

Pair 2

115

100.5

84.05

16.45

92.275

Fail

Parameter:

TDR_FE_ConnectorIMPZ

Unit : Ohm

Result:

Fail

Pair Name

Spec Max

Spec Min

Max Value

Min Value

Differ.

Average

Status

Pair 1

115

101.13

79.75

21.38

90.44

Fail

Pair 2

115

99.64

79.57

20.07

89.605

Fail

Parameter:

TDT_IntraPairSkew

Unit : ps

Result:

Pass

Pair Name

Spec Max

Spec Min

Skew Val.

Status

Pair 1

112

Pass

Pair 2

112

Pass

IJXXIADX --- 2012-04-18 11:35:13
6

	Parameter:			NA_Attenuation	Unit : dB/Cable	Result:	Pass
Start Freq	10	825	2475	4125				Pair
End Freq	825	2475	4125	5100				Status
Spec Max	--	--	--	--				↓
Pair 1	-4.563	-8.336	-12.46	-19.42				Pass
Pair 2	-4.647	-8.193	-12.44	-17.36				Pass
Spec Min	-5	-12	-20	-25
Worst Pair	Pair 2	Pair 1	Pair 1	Pair 1
Worst Freq	771.6	2307.5	3767.2	4719.2

IJXXIADX --- 2012-04-18 11:36:21
7

Parameter:

NA_NEXT

Unit : dB

Result:

Pass

Start Freq

Pair

End Freq

5000

Status

Spec Max

-26

↓

P 1-2

-28.75

Pass

Spec Min

Worst Pair

P 1-2

Worst Freq

1677.5

IJXXIADX --- 2012-04-18 11:37:36
8

Parameter:		TDR_CommonModeIMPZ		Unit : Ohm		Result:	Fail
Pair Name	Spec Max	Spec Min	Max Value	Min Value	Differ.	Average	Status
Pair 1	40	25	40.86	35.12	5.74	37.99	Fail
Pair 2	40	25	32.13	26.7	5.43	29.415	Pass

Parameter:		TDR_DifferialIMPZ		Unit : Ohm		Result:	Fail
Pair Name	Spec Max	Spec Min	Max Value	Min Value	Differ.	Average	Status
Pair 1	110	90	98.75	83.83	14.92	91.29	Fail
Pair 2	110	90	98.57	83.13	15.44	90.85	Fail

Parameter:		TDR_ConnectorIMPZ		Unit : Ohm		Result:	Fail
Pair Name	Spec Max	Spec Min	Node 1	Node 2	Differ.	Average	Status
Pair 1	115	85	99.09	83.89	15.2	91.49	Fail
Pair 2	115	85	99	83.11	15.89	91.055	Fail

IJXXIADX --- 2012-04-18 11:39:07
9

Parameter:

TDR_FE_ConnectorIMPZ

Unit : Ohm

Result:

Fail

Pair Name

Spec Max

Spec Min

Max Value

Min Value

Differ.

Average

Status

Pair 1

115

97.98

82.86

15.12

90.42

Fail

Pair 2

115

98.78

82.42

16.36

90.6

Fail

Parameter:

TDT_IntraPairSkew

Unit : ps

Result:

Pass

Pair Name

Spec Max

Spec Min

Skew Val.

Status

Pair 1

112

Pass

Pair 2

112

Pass

IJXXIADX --- 2012-04-18 11:40:34
10

Parameter:

TDR_FE_ConnectorIMPZ

Unit : Ohm

Result:

Fail

Pair Name

Spec Max

Spec Min

Max Value

Min Value

Differ.

Average

Status

Pair 1

115

97.98

82.86

15.12

90.42

Fail

Pair 2

115

98.78

82.42

16.36

90.6

Fail

Parameter:

TDT_IntraPairSkew

Unit : ps

Result:

Pass

Pair Name

Spec Max

Spec Min

Skew Val.

Status

Pair 1

112

Pass

Pair 2

112

Pass

IJXXIADX --- 2012-04-18 11:45:33
11

complementarity:

因IP補阻,眼圖及圖片無法上傳,也不能傳完整的報告,本人求教不辭辛苦,向高手們請教.(張麻子站著把錢給掙了,本人求教的同時也把金幣給掙了.)

274262832 --- 2012-04-18 11:45:45
12

線材部分阻抗盡量做到105ohms

極限眼圖會有提高，這只是改善方案，

再測試一下Skew，極限眼圖與衰減跟Skew有很大關(guān)系

IJXXIADX --- 2012-04-18 11:47:33
13

嗯,本人真大意,30AWG.

IJXXIADX --- 2012-04-18 11:52:18
14

2m測試都沒有問題.

暗劍 --- 2012-04-18 11:56:04
15

兄弟，從測試結(jié)果上看，你的線材導(dǎo)體應(yīng)該是30AWG的吧？你說測試眼圖不過，請問是測試什么規(guī)格眼圖不過？1080P的還是3.4G的眼圖？感覺你這個測試有點問題，RAW cable阻抗好好的，怎么成品測試線材差分阻抗就變的那么差了呢？阻抗這么低，除了測試問題還有就是最好把連接器的阻抗在加工前先抽測一下，看看是否合格！

取個名字難 --- 2012-04-19 08:17:45
16

裸線差分阻抗是好的加工后差分阻抗低了那么多？？？

如果是同一條線根本不可能吧�。�

唯一出錯的地方應(yīng)該是測試裸線和測試成品的軟件是否未校正或者測試哪出了問題！

IJXXIADX --- 2012-04-23 16:51:07
17

兩端加了磁環(huán),

如果磁環(huán)壓力過大會是什麼情況?

vbgfrttw --- 2012-04-25 08:43:40
18

Thanks.

暗劍 --- 2012-04-25 15:59:22
19

應(yīng)該是磁環(huán)那里出問題了吧，正常來說CABLE的阻抗高點和低點不會相差一、二十歐啊。這樣阻抗也太不穩(wěn)定了

liuandy --- 2012-04-26 09:36:28
20

應(yīng)該是連接器的阻抗與RAW CABLE的阻抗不匹配造成的

IJXXIADX --- 2012-04-26 15:13:53
21

嗯.

多謝暗劍兄弟,還在找原因.

今天又投了5Pcs去做Connector,明天再測試一下.

電線電纜網(wǎng) > 數(shù)據(jù) 高頻線纜 > HDMI 1.4 眼圖與高頻報告分析求教.（完整版）

HDMI 1.4 眼圖與高頻報告分析求教. - 無圖版

IJXXIADX --- 2012-04-18 11:28:451

IJXXIADX --- 2012-04-18 11:30:432

IJXXIADX --- 2012-04-18 11:31:103

IJXXIADX --- 2012-04-18 11:31:524

IJXXIADX --- 2012-04-18 11:33:255

IJXXIADX --- 2012-04-18 11:35:136

IJXXIADX --- 2012-04-18 11:36:217

IJXXIADX --- 2012-04-18 11:37:368

IJXXIADX --- 2012-04-18 11:39:079

IJXXIADX --- 2012-04-18 11:40:3410

IJXXIADX --- 2012-04-18 11:45:3311

274262832 --- 2012-04-18 11:45:4512

IJXXIADX --- 2012-04-18 11:47:3313

IJXXIADX --- 2012-04-18 11:52:1814

暗劍 --- 2012-04-18 11:56:0415

取個名字難 --- 2012-04-19 08:17:4516

IJXXIADX --- 2012-04-23 16:51:0717

vbgfrttw --- 2012-04-25 08:43:4018

暗劍 --- 2012-04-25 15:59:2219

liuandy --- 2012-04-26 09:36:2820

IJXXIADX --- 2012-04-26 15:13:5321

-- 結(jié)束 --

IJXXIADX --- 2012-04-18 11:28:45
1

IJXXIADX --- 2012-04-18 11:30:43
2

IJXXIADX --- 2012-04-18 11:31:10
3

IJXXIADX --- 2012-04-18 11:31:52
4

IJXXIADX --- 2012-04-18 11:33:25
5

IJXXIADX --- 2012-04-18 11:35:13
6

IJXXIADX --- 2012-04-18 11:36:21
7

IJXXIADX --- 2012-04-18 11:37:36
8

IJXXIADX --- 2012-04-18 11:39:07
9

IJXXIADX --- 2012-04-18 11:40:34
10

IJXXIADX --- 2012-04-18 11:45:33
11

274262832 --- 2012-04-18 11:45:45
12

IJXXIADX --- 2012-04-18 11:47:33
13

IJXXIADX --- 2012-04-18 11:52:18
14

暗劍 --- 2012-04-18 11:56:04
15

取個名字難 --- 2012-04-19 08:17:45
16

IJXXIADX --- 2012-04-23 16:51:07
17

vbgfrttw --- 2012-04-25 08:43:40
18

暗劍 --- 2012-04-25 15:59:22
19

liuandy --- 2012-04-26 09:36:28
20

IJXXIADX --- 2012-04-26 15:13:53
21