5

qDifferential Insertion Loss

The differential insertion loss is less than -2dB up to 12GHz.

0

5

10

15

20

-10

-9

-8

-7

-6

-5

-4

-3

-2

-1

0

S514

0

5

10

15

20

-10

-9

-8

-7

-6

-5

-4

-3

-2

-1

0

S514

0

5

10

15

20

-10

-9

-8

-7

-6

-5

-4

-3

-2

-1

0

S514

17mm Height

25mm Height

32mm Height

qDifferential Return Loss

The connector-only differential return loss for the center pair meets the extrapolated IEEE 802.3ap spec up to

12GHz. (The attenuation of PCB traces in the channel will give an even larger margin.)

0

5

10

15

20

-50

-40

-30

-20

-10

0

Frequency (GHz)

RL

IEEE Spec

0

5

10

15

20

-50

-40

-30

-20

-10

0

Frequency (GHz)

RL

IEEE Spec

0

5

10

15

20

-50

-40

-30

-20

-10

0

Frequency (GHz)

RL

IEEE Spec

17mm Height

25mm Height

32mm Height

qDifferential Near-End Crosstalk (NEXT)

The near-end crosstalk at the center pair from surrounding 8 aggressors is shown below. The NEXT is not as

critical because TX and RX can be grouped into separate wafers.

0

5

10

15

20

-60

-50

-40

-30

-20

-10

0

Frequency (GHz)

S51

S52

S53

S54

S56

S57

S58

S59

Sum

0

5

10

15

20

-60

-50

-40

-30

-20

-10

0

Frequency (GHz)

S51

S52

S53

S54

S56

S57

S58

S59

Sum

0

5

10

15

20

-60

-50

-40

-30

-20

-10

0

Frequency (GHz)

S51

S52

S53

S54

S56

S57

S58

S59

Sum

17mm Height

25mm Height

32mm Height