TDR

Rambus( USB 2.0 ( ) Firewire (IEEE 1394 (TDR) 80E04 TDR

) TDS8000 TDR

1 www.tektronix.com/scopes/
 TDR

ZL ( ZO ZL

(TDR)
TDR Vreflected (ZL Z0 )
ρ= =
Vincident (ZL + Z0 )
1
TDR
(
+1 -1 0
ZL ZO Vreflected 0 (
0

Vreflected 0
ρ= = =0
Vincident V
1. TDR
ZL (0)
TDR (
-1

Vreflected -V
ρ= = = -1
Vincident V

ZL
TDR
TDR TDR ( +1
TDR Vreflected V
( (rho) ( ρ= = =1
Vincident V

Vreflected
ρ=
Vincident

2 www.tektronix.com/scopes/
 TDR

2 TDS8000 TDR

3: TDR

TDR
4 8
TDR

2:
-1 ρ(rho) ( ) ρ= +1

( ZO ZL
4:
(1 ρ)
Z O=Z L *
(1 ρ)

TDR TDS8000
( (rho)
TDR
3

5:

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 TDR

9 TDR

6:
TDR TDS8000 80E04 TDR

9
TDR 80E04

TDR
7:

8:
9: TDR

4 www.tektronix.com/scopes/
 TDR

TDR
TDR (
TDR 10)
TDR (DUT)
TDR

TDR

TDR

TDR

TDR
TDR TDR
DUT
T(resolution) =1/2 TR(system) (ZO)

TDR
TDR
rho ohm
(Z O ) TDR
TDS8000 3.5 mm
rho ohm

www.tektronix.com/scopes/ 5
 TDR

TDR /
rho ohm DUT
TDS8000
rho ((cable ) DUT
(1- |( cable |)

DUT

50
DUT
50

DUT

DUT

50
DUT
DUT 50 DUT 50

TDS8000

6 www.tektronix.com/scopes/
 TDR

DUT

TDR

DUT TDR
TDS8000
DUT

DUT

TDS8000 TDR
DUT
TDR
ρ
TDR

TDR

TDR
35 ps

35 ps
TDR ECL
200 ps 2 ns
35 ps
1 ns ECL

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 TDR

TDR DUT
TDS8000
TDR
80E04 TDR
TDR DUT

DUT
TDR

TDR
TDR TDR
DUT
DUT TDR DUT

TDS8000
2

TDS8000 TDR Setup

TDR

TDS8000

8 www.tektronix.com/scopes/
 TDR

SMA

10 Mohm

TDR
SIU800
DUT

DUT TDR /

50
50

USB 2.0 TDR

P6150
USB 2.0
P6150
USB
80E04
50
TDS8000

USB 2.
0

Zodd = 45Ω(Zdiff = 90Ω) 15%

Zeven = 60Ω(Zcm = 30Ω) 30%

26 ns (TFSCBL)
D+ D-
90

www.tektronix.com/scopes/ 9
 TDR

TDR
TDR

TDR

TDR
IC
2.0 1

80E04 TDS8000
TDR 400 ps
TDR
TDR

USB
TDR (ZHSTERM) TDR

1: 2.0 (www.usb.org/developers/usb20)
A
8 ns

B 4 ns

80ΩZHSTERM 100Ω

(ZHSTHRU ) 500 ps

70ΩZHSTHRU 110Ω

( 1.4
ns )
TDR
(400 ps)

10 www.tektronix.com/scopes/
 TDR

11 USB 2.0 TDR

SMA

USB 2.0
DUT
12: TDR SETUP
SMA USB
SMA TDR
11 TDS8000 TDR Setup

SMA TDS8000 Ch 3 Ch 4
80E04 20-GHz TDR 12

(()

Display Vectors
Oscilloscope Averaging

TDR

rho

rho

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 TDR

13: TDR
14: TDR

Horizontal Vertical

USB 13

TDR Setup Deskew

DUT USB
14

15: Define Math

Math (Windows( Edit

math ) Filter Filter Risetime
( 15) USB
400 ps

+
14 Math
Waveform Apply

12 www.tektronix.com/scopes/
 TDR

17: USB 2.0

USB 2.0
16: Measurement
17 TDR Min Max
USB 90( ( 15%

Amplitude Measurement Max Min

( M1
)

Measurement Setup ( 16) Gates

Region
10% 90%
Annotations

www.tektronix.com/scopes/ 13
 TDR

TDR

TDR
TDS8000
18: USB 2.0 ( )

18 TDR TDR DUT

USB TDS8000
USB
TDR

14 www.tektronix.com/scopes/
 TDR

TDS8000 80E04 TDR

TDS8000 50 GHz

TDR 80E04
TDR

TDR

TDR
14
TDS8000
rho ohm TDS8000
TDR

TDS8000 Windows(
Windows

TDA Systems IconnectTM

TDR

TDS8000
TDS8000
GPIB TDS
TDS8000 TDS8000 USB
PS-2 USB

TDS8000

www.tektronix.com/scopes/ 15
 TDR

TLA600 TLA700

www.tektronix.com Resources For You

16 www.tektronix.com/scopes/