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SI PPG/ED Signal Integrity Evaluation
Strengthened Signal Integrity Evaluations in Addition to New SI PPG, SI ED and Noise Generator Modules
Emphasis and equalizer functions are built-in to correct transmission path losses and assure signal integrity as signals become faster and as high-
speed devices use lower signal levels to help reduce power consumption.
10Tap Emphasis
The 10Tap Emphasis option installed in the transmission-side21G/32 Gbit/s SI PPG MU195020A can accurately replay simulated waveforms for
various devices and channels (corrected for loss after passage through channel) to help improve design efficiency.
Multi-band CTLE
Installing the CTLE option supporting multi-band input signals of 28, 16, and 8 Gbit/s at the receive-side of the 21G/32G bit/s SI ED MU195040A
permits BER measurements even when the Eye is closed by transmission path losses. Since this CTLE function is a hardware equalizer rather than the
software emulator, it supports evaluation of TRx BER performance under near-to-live conditions, such as BER evaluation of test signals, and
comparison of DUT BER measurement results.
3-band CTLE Block Image
Waveform adjustment using 10Tap Emphasis Function
ISI Setting Screen Example
Emphasis Setting Screen Example
ISI, CEI-28G, 14 dB Loss waveform (typical)
Data Input BER Measurement
Waveform after passage through 28 Gbit/s,
–10 dB @ 14 GHz channel
28 Gbit/s open Eye waveform using CTLE
28 Gbit/s
16 Gbit/s
8 Gbit/s
4 GHz
8 GHz
14 GHz
Additionally, the Variable ISI (option) can generate a signal with simulated Loss between the Tx and Rx channels of high-speed devices by setting the
channel Loss for the frequencies defined in CEI-28 G/25G and the S-parameter information, and can also easily output a Loss-corrected waveforms.
As a result, channel-Loss dependent high-speed device performance tests can be run easily with good reproducibility without needing to prototype
multiple channel boards, helping cut development time.
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For Variable ISI (option), use either in combination with ISI Board J1758A (select J1758A) or in combination with external channel board (select Not Specified).