The Anritsu MP1900A 32 Gbaud PAM4 Solution is a Signal Quality Analyzer-R (SQA-R) designed for high-speed serial data analysis, particularly for 400GbE transceivers and devices. It features a high-expandability design, offering both real-time and sequential Bit Error Rate (BER) measurements for PAM4 signals.
Function Description:
The MP1900A series provides a comprehensive solution for generating and analyzing PAM4 signals up to 32 Gbaud. Its core functionality revolves around:
- PAM4 Signal Generation: The system can generate PAM4 signals up to 32 Gbaud using the MU195020A 21G/32Gbit/s SI PPG (Pulse Pattern Generator).
- Real-time BER Measurement: This is achieved using the G0375A 32 Gbaud Power PAM4 Converter and the G0376A 32 Gbaud PAM4 Decoder with CTLE (Continuous Time Linear Equalizer). The G0375A converts the generated PAM4 signals, which are then analyzed by the G0376A for real-time BER.
- Sequential PAM4 BER Measurement: The MU195040A 21G/32Gbit/s SI ED (Error Detector) is used for sequential BER measurements, providing a more efficient inspection method for high-speed transceivers.
- Jitter Tolerance Testing: The system supports PAM4 jitter tolerance testing using the MU195040A PAM4 sequential measurement. This involves the MU181000B Synthesizer and MU181500B Jitter Modulation Source to introduce controlled jitter.
- Noise Generation: The MU195050A Noise Generator can be integrated to evaluate device performance under noisy conditions.
Important Technical Specifications:
G0375A 32Gbaud Power PAM4 Converter + MU195020A 21G/32G bit/s SI PPG (Transmitter - Tx):
- Number of Outputs: 2 (Data, xData), AC coupling.
- Baud Rate: 10 to 32.1 Gbaud.
- Output Amplitude: 0.3 to 1.95 Vp-p (Single-end, typical). Data1 input 0.2 to 1.3 Vp-p and Data2 input 0.1 to 0.65 Vp-p.
- Random Jitter (rms): 200 fs (typical).
- Tr/Tf (20% to 80%): 14 ps (typical), using MU195020A SI-PPG.
- Eye Linearity (RLM): 0.6 to 1, adjustable from level ratio.
- Number of Inputs: 4 (Data1, xData1, Data2, xData2). Uses Data3 and J1735A (two for differential) at 3 Eye independent level control.
- Maximum Input Amplitude: 1.5 Vp-p (Data1, xData1), 0.75 Vp-p (Data2, xData2).
- In/Out Connector: K (female).
G0376A 32Gbaud PAM4 Decoder with CTLE + MU195040A 21G/32G bit/s SI ED (Receiver - Rx):
- Number of Inputs: 2 (Data, xData), 1 (External clock). K Connector (female).
- Baud Rate: 10 to 32.1 Gbaud (DFF ON mode), 10 to 28.1 Gbaud (DFF OFF mode). Uses MU19040A with external clock or CDR of MU195040A-022.
- Data Input Amplitude: 0.4 Vp-p (typical), 0.5 Vp-p (maximum). Single-ended.
- Data Input Sensitivity: 40 mV (typical) at 28 Gbaud, Per Eye, Eye Height, Single-ended at E-6.
- Clock Input Frequency: 10 to 32.1 GHz (DFF ON mode). Full-rate clock.
- Clock Input Amplitude: 0.3 to 1.0 Vp-p. External Clock Input.
- Number of Outputs: 3 (Data1, Data2, Monitor Data). K Connector (female).
- Data Output Level: 0/-0.3 V (typical).
- Internal DFF: Selectable ON/OFF. Uses external Clock for D-FF ON mode.
- CTLE Gain: -12 to 0 dB adjustable.
- CTLE Peak Frequency: 14 GHz (typical).
- CTLE Number of Outputs: 2 (Data, xData). K Connector (female).
- Number of Inputs: 2 (Data, xData). K Connector (female).
- Data Input Amplitude: 0.3 to 1.0 Vp-p (≤ 28.1 Gbaud), 0.4 to 1.0 Vp-p (> 28.1 Gbaud). Single-ended.
- Data Input Sensitivity:
- 120 mVp-p, 40 mVp-p/Eye (typical, 21Gbaud)
- 150 mVp-p, 50 mVp-p/Eye (typical, 28.1Gbaud)
- Eye amplitude, PRBS15, Single-ended, CTLE Off
- 24 mV/Eye (typical, 21Gbaud)
- 26 mV/Eye (typical, 28.1Gbaud)
- Eye height, PRBS15, Single-ended, CTLE Off
- Phase Margin:
- Middle eye: 8 ps (typical 25 Gbaud), 5 ps (typical 28 Gbaud)
- Upper and Lower: 5 ps (typical 25 Gbaud), 3 ps (typical 28 Gbaud)
- 0.5 Vp-p input, Emphasis control (1Pre<=3 dB, 1Post <=1 dB), PRBS15, Single-ended, CTLE Off
- Eye Width:
- Middle eye: 20 ps (typical 25 Gbaud), 15 ps (typical 28 Gbaud)
- Upper and Lower: 20 ps (typical 25 Gbaud), 15 ps (typical 28 Gbaud)
- 0.5 Vp-p input, Emphasis control (1Pre<=3 dB, 1Post <=1 dB), PRBS15, Single-ended, CTLE Off
Usage Features:
- Small Remote Head: Facilitates close-in approach to the Device Under Test (DUT).
- Multi-channel Support: The system supports multiple channels for comprehensive testing.
- Excellent Expandability: Designed for future upgrades and module additions.
- PAM4/NRZ Support: Versatile for different modulation schemes.
- High Input Sensitivity: 40 mV(EH) for the G0376A, allowing for accurate measurements even with low-amplitude signals.
- True PAM4 BER Measurement: Provides accurate BER results for PAM4 signals.
- Software Control (MX183000A PAM4 Control): The system is controlled via software, allowing for easy setup and configuration of various parameters like amplitude, emphasis, skew, and pattern.
- Emphasis Settings: Allows for precise adjustment of pre-cursor and post-cursor emphasis to optimize signal quality. The "Tracking" feature automatically applies the same emphasis settings to Data1 (MSB) and Data2 (LSB).
- Skew Adjustment: Enables adjustment of skew between Data1 and Data2 while observing the G0375A output waveform on an oscilloscope, crucial for aligning the skew between MSB and LSB of PAM4.
- DFF Auto Search: Automates the search for optimal DFF settings for BER measurements.
- Input Condition Selection: Allows selecting between single-ended and differential input conditions for the decoder.
- Test Patterns: Supports various test patterns like PRBS31Q and PRBS15 for thorough testing.
- Auto Measurement: Features an "AUTO MEAS" function with "PAM4 BER" option for automated measurement procedures.
Maintenance Features:
The manual primarily focuses on setup and measurement procedures rather than explicit maintenance features. However, the modular design of the MP1900A series, with separate units for PPG, Synthesizer, Jitter Modulation, PAM4 Converter, PAM4 Decoder, and Error Detector, implies ease of module replacement and potential for individual unit servicing. The use of standard K connectors for inputs and outputs also simplifies cable management and potential troubleshooting. The software-driven control (MX183000A) likely includes diagnostic tools and firmware update capabilities, which are common maintenance aspects for such sophisticated equipment.
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