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M8040A Datasheet(PDF) 10 Page - Keysight Technologies

Part No. M8040A
Description  M8040A High-Performance BERT 64 GBaud
Download  28 Pages
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Maker  KEYSIGHT [Keysight Technologies]
Homepage  http://www.keysight.com
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M8040A Datasheet(HTML) 10 Page - Keysight Technologies

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10 | Keysight | M8040A High-Performance BERT 64 GBaud - Data Sheet
NRZ
PAM-4
De-emphasis taps
4, can be adjusted for each channel independently
Pre-cursor coefficient c0
0.0 to ± 0.40 1
0.0 to ± 0.40 1
Main cursor coefficient c1
0.0 to ± 0.40 1
0.0 to ± 0.40 1
Post-cursor coefficient c2
0.0 to ± 1.0 1
0.0 to 1.0 1
Post-cursor coefficient c3
0.0 to ± 0.40 1
0.0 to ± 0.40 1
Cursor coefficient resolution
0.01
0.01
De-emphasis (DATA OUT)
The M8045A provides built-in de-emphasis with positive and negative cursors based on a finite
impulse response (FIR) filter see Figure 10. Users can enter the de-emphasis in coefficient
values.
Table 2. Specifications for multi-tap de-emphasis (requires Option 0G4).
1. Sum of all cursors absolute values may not exceed 1.0 |c0| +|c1| +|c2 |+|c3| ≤ 1. Also |c0|, |c1|, |c3| < |c2|.
1 UI
delay
c0
c2 (main)
c3
1 UI
delay
c1
1 UI
delay
Figure 11. The pattern generator of M8045A provides integrated de-emphasis to emulate TX equalization. The post-
cursor c3 , main cursor c2 and two pre cursors c0 and c1 can be adjusted.


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