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# 示波器原理及應用

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### 示波器原理及應用

1. 1. 量 理1 15:12
2. 2. 立 年 北 量2 15:12
3. 3. 類 數 理 理 類 數 量 – 數3 15:12
4. 4. 類 (Analog Real Time) 類 •類 •類 • • • 參數量 • • • • 連 量4 15:12
5. 5. 數 (Digital Storage Oscilloscope) 數 •數 •數 • • , , • 參數量 不 • 力 • 連 量5 15:12
6. 6. 易 •數 •類 • • , , • • 參數量 • 力 • • 連 量6 15:12
7. 7. DPO數 數 uP 數 A/D DPX™ 理7 15:12
8. 8. • 寬 (Bandwidth) • (Linear Range) (Overdrive Recovery) • ( Sampling Rate) • (Channel) (Channel Deskew) • (Memory Depth) • v.s. (Time Base) v.s. 錄 • (Display Mode) • DPO (DPO Display) • (Trigger) •8 15:12
9. 9. (Bandwidth) 寬 – 0.707 -3dB 寬 xTDS 784D p p p 0.707V, fBW V fBW : -3dB ( ) 20log0.707 = -3dB9 15:12
10. 10. v.s. 率 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 100 } 3% 97.5 95 92.5 量 90 (%) 87.5 率 85 10 82.5 80 度. 量 77.5 3% 75 72.5 , 70.7 -3dB 率 3 . 率 量 30% 3dB .10 15:12
11. 11. 寬 v.s. 寬 ( ) 寬(BW) 0.35/ (tr) 說 BW x tr = 0.35 tr BW 0.4 0.9 V (tr) V 0.1 V BW = 0.35/ tr11 15:12
12. 12. v.s. 寬-- (Transition-time) – ( ) ( 寬X = 0.35) – ( 寬 寬) 量 = ( ) +( 2 ) 2 – 350MHz 寬 1ns (0.35/350M) 1ns ( 寬 寬 ) : 量 = (1ns )2 + (1ns )2 = 1 . 41 ns – 1GHz 寬 350ps (0.35/1G) ( 寬 寬3 ) : 量 = (1ns )2 + (350 ps ) = 1 . 06 ns 212 15:12
13. 13. vs. 度 寬 tr / tr 量 1:1 41.4% 3:1 5.4% 5:1 2.0% 10:1 0.5%13 15:12
14. 14. 寬 v.s. 寬 量 = ( ) +( 2 ) +( 2 ) 214 15:12
15. 15. 寬 寬 2 2 2 1 ⎛ 1 ⎞ ⎛ 1 ⎞ ⎛ 1 ⎞ = ⎜ ⎟ +⎜ ⎟ +⎜ ⎟ 量 ⎝ ⎠ ⎝ ⎠ ⎝ ⎠ 寬 寬 寬 說 寬 寬15 15:12
16. 16. Example for Scope Selection Calculated Measurement Measurement Typical Signal Bandwidth Bandwidth Logic Signal Bandwidth for ≈ 3% For ≈ 1.5% Family Rise Times = 0.35* Rolloff Rolloff trise Error Error TTL 5 ns 70 MHz 231 MHz 350 MHz CMOS 1.5 ns 230 MHz 767 MHz 1.15 GHz ECL 500 ps 700 MHz 2.33 GHz 3.5 GHz GaAs 200 ps 1.75 GHz 5.8 GHz 8.75 GHz trise (displayed) = (trise (scope) )2 + (trise (probe) )2 + (trise (source) )216 15:12
17. 17. • 寬 (Bandwidth) • (Linear Range) (Overdrive Recovery) • ( Sampling Rate) • (Channel) (Channel Deskew) • (Memory Depth) • v.s. (Time Base) v.s. 錄 • (Display Mode) • DPO (DPO Display) • (Trigger) •17 15:12
18. 18. (Linear Range) 復(Overdrive Recovery) 兩 • 靈 度 量 度 例 • 度 量 度 x p TDS 784D p p ( 靈 度)18 15:12
19. 19. 復• 復 復 力 量• 量 復 來 量 不 來 度不 量19 15:12
20. 20. 復20 15:12
21. 21. 復21 15:12
22. 22. • 寬 (Bandwidth) • (Linear Range) (Overdrive Recovery) • ( Sampling Rate) • (Channel) (Channel Deskew) • (Memory Depth) • v.s. (Time Base) v.s. 錄 • (Display Mode) • DPO (DPO Display) • (Trigger) •22 15:12
23. 23. 率 (Sampling Rate) 類 連 數 料. * 率 度 率 . Analog Waveform Sample Clock Digital Data * (Real Time) * (Equivalent Time) - (Sequential) - (Random)23 15:12
24. 24. 料. . . Nyqeist理論 率 2 . 例 SinX/X (Interpolation) 2.5 率 . (Single shot).24 15:12
25. 25. 利 來 . * . * 率 率. * 更 度. *兩 . - (Sequential Equivalent Time Sampling). - (Random Equivalent Time Sampling).25 15:12
26. 26. 1. • 累 • T1 T2 T3 S1 S2 S3 TN 不 力 S1 SN26 15:12
27. 27. 2. • 累 • 了 量 • 更 更 率 T1 T2 T3 S1 S2 S3 S4 S5 S6 S7 S8 S9 TN / 力 S(T1) S(TN)27 15:12
28. 28. 率 理論 f g(t), 2f , n=∞ n g(t ) = ∑ g( ) sin c ( 2 ft − n ) n = −∞ 2f • g(n/2f) • sinc(2ft - n) 數(Interpolation Function) • (Interpolation Formula) sinc , 2f , f g(t) , 2f ( 寬 ) Nyquist Sinc(2ft - n)28 15:12
29. 29. 率 理論 路 2f 率( 2.5f), 率 f 率 率Aliasing 29 15:12
30. 30. 率 • • : BW=0.35/tr 90% 率不 10%30 15:12
31. 31. 率 (glitch) 4 4 率( ) 不31 15:12
32. 32. • 寬 (Bandwidth) • (Linear Range) (Overdrive Recovery) • ( Sampling Rate) • (Channel) (Channel Deskew) • (Memory Depth) • v.s. (Time Base) v.s. 錄 • (Display Mode) • DPO (DPO Display) • (Trigger) •32 15:12
33. 33. 數 數 數 數 不 − 量 度 − 流 參數 力 量 − Use A Fast Signal Generator To Fine Tune The Alignment Of The Measurement System33 15:12
34. 34. 數 率 數 率 降 例 TDS5000B TDS7000B 列 ( TDS5104B 例) - TDS5104B 率 5GS/s 1 Channel . - 2 Channel : 2.5GS/s - 3~4 Channel : 1.25GS/s 率不 例 TDS6000B TDS3000B 列 ( TDS6804B 例) - TDS6804B 1~4 Channel 率20GS/s.34 15:12
35. 35. • 寬 (Bandwidth) • (Linear Range) (Overdrive Recovery) • ( Sampling Rate) • (Channel) (Channel Deskew) • (Memory Depth) • v.s. (Time Base) v.s. 錄 • (Display Mode) • DPO (DPO Display) • (Trigger) •35 15:12
36. 36. 度 (Memory Depth) 錄 度 來 來 錄 料 錄 度 數 數 率 錄 度 錄 錄 率 × 錄 度 Duration Record Length Sample Rate Resolution 20 us 500 Samples 25 MS/s 40 ns/pt 200 us 5000 Samples 25 MS/s 40 ns/pt36 15:12
37. 37. • 寬 (Bandwidth) • (Linear Range) (Overdrive Recovery) • ( Sampling Rate) • (Channel) (Channel Deskew) • (Memory Depth) • v.s. (Time Base) v.s. 錄 • (Display Mode) • DPO (DPO Display) • (Trigger) •37 15:12
38. 38. 率 v.s. (Time Base) v.s. 錄 度• 率 錄 度 率 錄 度 率 例 錄 度 率38 15:12
39. 39. 率 v.s. (Time Base) v.s. 錄 度 度 兩 度 率 率 度 錄 度 兩 更 率 度 更 錄 度 Duration Record Length Sample Rate Resolution 20 us 500 samples 25 MS/s 40 ns/pt 20 us 5000 samples 250 MS/s 4 ns/pt39 15:12
40. 40. 率 v.s. (Time Base) v.s. 錄 度 列 度 錄 度 錄 度 更 Duration = 20 us Duration = 20 us Resolution = 8ns Resolution = 800ps Record Length= Record Length= 2500pts 25000pts40 15:12
41. 41. • 寬 (Bandwidth) • (Linear Range) (Overdrive Recovery) • ( Sampling Rate) • (Channel) (Channel Deskew) • (Memory Depth) • v.s. (Time Base) v.s. 錄 • (Display Mode) • DPO (DPO Display) • (Trigger) •41 15:12
42. 42. 錄 料 率 度 來 Fit to Screen 500 Points [ T ]42 15:12
43. 43. 料 Fit to Screen 500 Points | T [ ] |43 15:12
44. 44. 兩 • 9 8 7 6 5 • 度 4 3 2 不 不 度 1 A B C D E F 來 列 9 9 8 8 4 samples 7 7 6 6 3 samples 5 5 4 4 3 3 2 samples 2 2 錄 度 1 1 1 sample AB CDE F AB CDE F Decimation Intensity Shaded44 15:12
45. 45. 度 vco 2 MHz 200 kHz45 15:12
46. 46. • 寬 (Bandwidth) • (Linear Range) (Overdrive Recovery) • ( Sampling Rate) • (Channel) (Channel Deskew) • (Memory Depth) • v.s. (Time Base) v.s. 錄 • (Display Mode) • DPO (DPO Display) • (Trigger) •46 15:12
47. 47. DPO 數 利 更 率 料 累 異 料 量 類 數 Better Than Analog Better Than Digital And More47 15:12
48. 48. DPO • DPO 更 率 3D 料 累 類 數 3D 料 DPO48 15:12
49. 49. DPO • DPO 列 理 • DPX 理 立 理 亮度 • DPX 數 理 1,000 料量 • YT, XY XYZ49 15:12
50. 50. DPO 例 更 率 度 異 見50 15:12
51. 51. DPO (Persistance) 利 連 累 來 異 異 更 率 更 率若 異 異 狀 量 更 率 異 來 狀51 15:12
52. 52. DPO 錄 度 異 利 錄 度 異 異 異 率 錄 度 若異 錄 度 異 異 異 參數 量 異 料 異 率 不 不 率52 15:12
53. 53. • 寬 (Bandwidth) • (Linear Range) (Overdrive Recovery) • ( Sampling Rate) • (Channel) (Channel Deskew) • (Memory Depth) • v.s. (Time Base) v.s. 錄 • (Display Mode) • DPO (DPO Display) • (Trigger) •53 15:12
54. 54. (Trigger)54 15:12
55. 55. – (Edge) – (Pulse) 寬 (width), (glitch), (runt), (Transition (slew rate)), (timeout), (Window) – (Logic) (AND, OR, NAND, NOR) / (setup/hold), (Pattern), 狀 (State) – (TV / Video) (option) – (Communication) (option) ITU-T, TI102, SDH/SONET, Fiber Channel, Ethernet, PCI-E, SATA, XAUI55 15:12
56. 56. • • 兩 T1 T2 T1<T2 • 度T T1<T<T2 -- (Inside) T<T1 T>T2 -- (Outside) •56 15:12
57. 57. • • T1 • 度T T<T1 • T157 15:12
58. 58. • • 兩 臨 (Thresholds) A1 A2 A1<A2 • A A1<A<A2 • • A2 A158 15:12
59. 59. ( 率) • ( 降) ( 降) • 臨 A1 臨 A2 A1A2 T • A1A2 ( 降) 若 ( ) ( )T • 臨 A1 T ( ) T ( ) 臨 A2 ( )T ( )T ( )T ( )T59 15:12
60. 60. • ( ) 數 • 兩 (Clock) 數 (Data) • 數 Ts Th • 參 數 數 • 數 Ts Th (Clock) 參 X 數 (Data) 數 X 參 Ts Th60 15:12
61. 61. • 邏 • 邏 (H, L, X) 邏 (AND, OR, NAND, NOR) 臨 • 邏 邏 HHLL AND61 15:12
62. 62. 狀 • 邏 狀 • 4 • (1-3) 邏 (H, L, X) 邏 (AND, OR, NAND,NOR) 臨 • 4 邏 狀 若 4 邏 狀 HHLL AND62 15:12
63. 63. (Delay)63 15:12
64. 64. (DC) (AC) (HF Reject) (LF Reject) (Noise Reject) “0” 0 寬 ( 流 ) (若 流 來 0V) 流 0V64 15:12
65. 65. • 寬 (Bandwidth) • (Linear Range) (Overdrive Recovery) • ( Sampling Rate) • (Channel) (Channel Deskew) • (Memory Depth) • v.s. (Time Base) v.s. 錄 • (Display Mode) • DPO (DPO Display) • (Trigger) •65 15:12
66. 66. 量 量 參數 率 降 度 參數 量參數66 15:12
67. 67. 量 量 量參 參數 不67 15:12
68. 68. 量 量 量 數 數 數 數 數 數 數68 15:12
69. 69. 量 數 率 兩 數 數69 15:12
70. 70. 量 率 立葉 類 率70 15:12
71. 71. Tektronix DSO DPO High Sampling TDS1000 TDS3000B TDS8000B TDS2000 TDS5000B CSA8000B THS700 TDS7000B TDS6000B,C71 15:12
72. 72. Tektronix Performance Oscilloscopes TDS7000/B Series DPO TDS7054 TDS7104 TDS7154B TDS7254B TDS7404B TDS7704B Bandwidth 500 MHz 1 GHz 1.5 GHz 2.5 GHz 4 GHz 7GHz Rise Time 800ps/– 400ps/– 200ps/135ps 130ps/83ps 100ps/72ps 62ps/43ps 10%-90%/20%-80% Sample Rate 5 GS/s 10 GS/s 20 GS/s 20 GS/s 20 GS/s 20 GS/s Waveform > 200,000 > 200,000 > 400,000 > 400,000 > 400,000 > 400,000 Capture Rate wfms/sec wfms/sec wfms/sec wfms/sec wfms/sec wfms/sec Record Length 16 MB 16 MB 64 MB 64 MB 64 MB 64 MB Fidelity Analysis Usability72 15:12
73. 73. Tektronix Performance Oscilloscopes CSA7000/B Series DPO CSA7154 CSA7404B Bandwidth 1.5 GHz 4 GHz Rise Time 240ps/– 100ps/72ps 10%-90%/20%-80% Sample Rate 20 GS/s 20 GS/s Waveform > 400,000 > 400,000 Capture Rate wfms/sec wfms/sec Record Length 32 MB 64 MB73 15:12
74. 74. TDS Ultra-Performance Portfolio ¼ ¼74 15:12
75. 75. TDS Ultra-Performance Portfolio TDS6124C TDS6154C TDS7704B Bandwidth 12 GHz 15 GHz - DSP 7 GHz Sample Rate 40 GS/s 40 GS/s 20 GS/s On 1 Channel Sample Rate On 4 Channel 20 GS/s 20 GS/s 5 GS/s Record Length 4MB / 2 MB 4MB / 2 MB 4MB / 1 MB Std 1 / 4 Ch 64MB / 32 MB 64MB / 32 MB 64MB / 16MB Max 1 / 4 Ch DPO No No Yes Pinpoint™ Yes Yes Yes Triggering75 15:12
76. 76. New Pinpoint™ Trigger System Fastest, most complete Trigger System in the industry SiGe Technology – New! Full analog bandwidth in all trigger modes New triggering features – Window Triggering – Sequence Reset Triggering – Independent Trigger Level A Event, B Event, and each Channel – Logic Qualification on all Trigger Types – New! B Trigger offers complete suite of Trigger Types Benefits – Another level of discovery for device & system debug – Qualify captured data for further analysis76 15:12
77. 77. Pinpoint™ Triggering Performance Trigger Jitter – <1.5 ps* rms Glitch Width – <200 ps* glitch/width Trigger Sensitivity – 2.5div @ 9GHz – For All Trigger Types77 15:12
78. 78. Serial Compliance and Analysis TDS/CSA7000B Series SiGe Triggering System4Difficult debug issue4Quickly capture andisolate infrequent glitches 0Extremely low trigger jitter 41.2 ps rms (typical) 0TDS7704B finds 115ps glitch in the presence of data. 0Glitch can additionally be isolated with logic qualification to establish correlation TDS7704 triggering on a 115ps glitch in the presence of valid data. 78 15:12
79. 79. Serial Compliance and Analysis TDS6000B/TDS700B Series SiGe Triggering System4 Difficult debug issue4 Quickly isolate high speed timing violations. 0 Extremely low trigger jitter 4 1.2 ps rms (typical) 0 300ps setup or 200ps hold violation trigger shown 0 Timing violation can additionally be qualified DATA VALID HOLD TIME SETUP TIME TDS7704 capturing all data violating either 300ps setup or 200ps hold times79 15:12
80. 80. Pinpoint™ Triggering New Sequential Logic Triggering Old Trigger Sequences New Pinpoint Triggering – 17 Trigger Combinations – 1445 Trigger Combinations – Plus Comm & Serial – Plus Comm & Serial All At 7GHz !!80 15:12
81. 81. Pinpoint™ Triggering Sequential Logic Triggering Advanced Trigger Features – A-Trigger – Delay on Time & Events – B-Trigger New! Reset Triggering New! Advanced B-Trigger Arm Trigger on Reset A Event Trigger (Rising) Trigger on 3rd B Event (Falling)81 15:12
82. 82. Complete Solutions Applications packages – RT-Eye serial data compliance and analysis – JT3 jitter w/ Rj/Dj/Tj – ET3 electrical Ethernet – USB compliance and analysis – DVD – DVI – HDMI – Power compliance and analysis – Comm pulse mask testing New versions required for XGA compatibility – Most available at launch82 15:12