50: MS

50: MS

50: MS

50: MS

L=1"

L=1"

L=1"

L=1"

L = A, B or C

100: Diff.

Stripline

50:

Microstrip

L=4"

L=4"

L=4"

L=4"

TEST

CHANNEL

DS25CP102

CHARACTERIZATION BOARD

½ DS25CP102

PATTERN

GENERATOR

OSCILLOSCOPE

50:

Microstrip

50:

Microstrip

50:

Microstrip

TEST

CHANNEL

DS25CP102

SNLS262D – OCTOBER 2007 – REVISED MAY 2011

www.ti.com

Figure 8. Pre-Emphasis and Equalization Performance Test Circuit

Figure 9. Test Channel Block Diagram

Test Channel Loss Characteristics

The test channel was fabricated with Polyclad PCL-FR-370-Laminate/PCL-FRP-370 Prepreg materials (Dielectric

constant of 3.7 and Loss Tangent of 0.02). The edge coupled differential striplines have the following geometries:

Trace Width (W) = 5 mils, Gap (S) = 5 mils, Height (B) = 16 mils.

Test Channel

Length

Insertion Loss (dB)

(inches)

500 MHz

750 MHz

1000 MHz

1250 MHz

1500 MHz

1560 MHz

A

10

-1.2

-1.7

-2.0

-2.4

-2.7

-2.8

B

20

-2.6

-3.5

-4.1

-4.8

-5.5

-5.6

C

30

-4.3

-5.7

-7.0

-8.2

-9.4

-9.7

D

15

-1.6

-2.2

-2.7

-3.2

-3.7

-3.8

E

30

-3.4

-4.5

-5.6

-6.6

-7.7

-7.9

F

60

-7.8

-10.3

-12.4

-14.5

-16.6

-17.0

8

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