What are the test and measurement instruments for 400G optical modules?
High Performance Sampling Oscilloscopes (Optical/Electrical Eye Diagrammers) and Clock Recovery
High-speed sampling oscilloscopes are mainly used for optical eye diagram testing of optical transmitters, electrical eye diagram testing of optical modules and AOCs, etc. They can also be used for calibration of signals in future electrical receiver and optical receiver tolerance testing. The eye diagram test requires an operating clock synchronised with the signal. When the DUT is unable to provide a synchronised reference clock, an optical/electrical clock recovery module is required to recover the clock from the DUT before the test can be performed.
The Keysight N1000A series is a continuation of the classic sampling oscilloscope series based on the original 86100D, which is backward compatible with the modules on the original 86100D platform, and the combination of the N1060A module with high bandwidth and built-in CDR, PTB functions is a debugging tool in the research and development phase.The N1092 series of optical/electrical sampling oscilloscopes and N1077A/N1078A optical/electrical clock recovery modules are the most integrated and flexible high-speed optical/electrical eye diagram test instruments on the market. N1092 series optical/electrical sampling oscilloscopes and N1077A/N1078A optical/electrical clock recovery modules are the most integrated and flexible high-speed optical/electrical eye diagram test instruments on the market.
Its main indexes and features are as follows:
Singlemode/multimode optical port test: working wavelength range 830 to 1600 nm
Optical channel rate: support 25G/28Gbps NRZ, 53G/56Gbps PAM4, 106G/112Gbps PAM4 optical signal test
Sensitivity: -11dbm @850nm;-12.5dbm@1310nm
Differential electrical port test: integrated differential 50GHz bandwidth electrical port, support 32Gbps NRZ and 64Gbps PAM4 electrical eye diagram test
Intrinsic jitter: ≤200fs rms
Clock recovery: Support 32Gbps NRZ and 64Gbps PAM4 optical/electrical clock recovery.
Multi-channel expansion: through the computer USB port control, can be connected to multiple modules; test software supports up to 8 measurement modules, a total of 32 optical or electrical channels of parallel eye diagram test.
Powerful software: support 100GE 802.3 transmitter testing of various parameters, including jitter TJ, DJ, RJ, PJ, DDJ, ISI, BUJ, J1~J9, UJ, F/2, TI, DI, RI, OMA, Q value and RIN, RIN & OMA, etc., including 802.3bm standard for multi-mode signals in the TDEC test, as well as 400G PAM4 signal waveform parameters and TDECQ testing.
Keysight BER instruments and other optical instruments can be used to test the stress tolerance of 100G or 400G optical receivers. Keysight is the only manufacturer in the industry that can provide all the stress tolerance test solutions, which ensures smooth upgrading of the test system in the future.
High-speed PAM4 BER
High-speed BER instruments are mainly used to generate high-quality electrical excitation and BER testing for optical transmitter (optical eye diagram) testing, and can also be used to generate electrical signals with jitter and stress for verifying receive tolerance in electrical receiver and optical receiver tolerance testing. If only optical or electrical eye diagram testing is being performed, electrical excitation can be generated using a proven high quality flow tester.
The Keysight M8040A BER is the highest performance, most flexible and easiest to connect NRZ and PAM4 BER on the market.
Its main features and indicators are as follows:
High-speed electrical signal generation: the stand-alone box can generate 1 to 2-way 32Gbps NRZ signal generation, can upgrade the 64Gbps PAM4 signal or 128Gbps PAM4 signal function for 400G module testing.
High-speed telecommunication signal BER detection: the stand-alone box can support 1 to 2-channel 32Gbps NRZ signal BER detection, can upgrade 64Gbps PAM4 signal or 128Gbps PAM4 BER detection function for 400G module testing.
Optical pressure eye test: you can upgrade the optical pressure eye test and auto-calibration function for 100G and 400G optical modules.
Pre-emphasis: Optional built-in 4th order NRZ/PAM4 signal pre-emphasis.
Jitter injection: Optional built-in jitter injection of PJ, RJ, BUJ, etc. for NRZ/PAM4 signals.
Linearity adjustment: 3 eye heights of PAM4 signal can be adjusted independently.
Receiver Equalisation: Built-in adjustable CTLE equaliser for optimising BER reception.
Automatic Jitter Tolerance Test: The jitter frequency and size injected into the signal can be automatically adjusted according to the pre-set parameters, and the jitter tolerance curve can be automatically scanned out according to the BER change.
PRBS code types: 2n-1, n=7, 10, 11, 13, 15, 23, 31, etc.
Custom code length (per channel): 2Gbit (NRZ) or 1G symbols (PAM4).
Data Traffic Tester
Keysight's data test instruments are assembled by inserting test service boards into the tester frame, and provide different test capabilities according to the different test service boards inserted.Novus test service boards provide QSFP28 interfaces, and the K400 test service card provides QSFP_DD test interfaces.
The QSFP28 test service card supports fan-out (i.e., FAN-OUT) capability according to the IEEE protocol, and each QSFP28 interface supports fan-out into four 25GE rate SFP28 interfaces, and the relevant protocol standards are IEEE 802.3 100GBASE-R, IEEE P802.3bj, IEEE P802.3bm, IEEE P802.3bm, IEEE P802.3bm, IEEE P802.3bm, and IEEE P802.3bm. P802.3bj, IEEE P802.3bm, IEEE P802.3by.
K400 test service board supports 400G, 200G, 100G PAM4 rate conversion. Based on QSFP_DD, it supports Forward Error Correction (FEC) port statistics, including: Total Bit Errors, Max Symbol Errors, Corrected Codewords, Total Codewords, Uncorrectable Codewords, Frame Loss Ratio, Pre-FEC Bit Error Rate, and Codeword error distribution analysis; protocol KP4 RS-544.
Supports 400G Forward Error Correction (FEC) error injection.
Support L1 BERT test.
High Performance Sampling Oscilloscopes (Optical/Electrical Eye Diagrammers) and Clock Recovery
High-speed sampling oscilloscopes are mainly used for optical eye diagram testing of optical transmitters, electrical eye diagram testing of optical modules and AOCs, etc. They can also be used for calibration of signals in future electrical receiver and optical receiver tolerance testing. The eye diagram test requires an operating clock synchronised with the signal. When the DUT is unable to provide a synchronised reference clock, an optical/electrical clock recovery module is required to recover the clock from the DUT before the test can be performed.
The Keysight N1000A series is a continuation of the classic sampling oscilloscope series based on the original 86100D, which is backward compatible with the modules on the original 86100D platform, and the combination of the N1060A module with high bandwidth and built-in CDR, PTB functions is a debugging tool in the research and development phase.The N1092 series of optical/electrical sampling oscilloscopes and N1077A/N1078A optical/electrical clock recovery modules are the most integrated and flexible high-speed optical/electrical eye diagram test instruments on the market. N1092 series optical/electrical sampling oscilloscopes and N1077A/N1078A optical/electrical clock recovery modules are the most integrated and flexible high-speed optical/electrical eye diagram test instruments on the market.
Its main indexes and features are as follows:
Singlemode/multimode optical port test: working wavelength range 830 to 1600 nm
Optical channel rate: support 25G/28Gbps NRZ, 53G/56Gbps PAM4, 106G/112Gbps PAM4 optical signal test
Sensitivity: -11dbm @850nm;-12.5dbm@1310nm
Differential electrical port test: integrated differential 50GHz bandwidth electrical port, support 32Gbps NRZ and 64Gbps PAM4 electrical eye diagram test
Intrinsic jitter: ≤200fs rms
Clock recovery: Support 32Gbps NRZ and 64Gbps PAM4 optical/electrical clock recovery.
Multi-channel expansion: through the computer USB port control, can be connected to multiple modules; test software supports up to 8 measurement modules, a total of 32 optical or electrical channels of parallel eye diagram test.
Powerful software: support 100GE 802.3 transmitter testing of various parameters, including jitter TJ, DJ, RJ, PJ, DDJ, ISI, BUJ, J1~J9, UJ, F/2, TI, DI, RI, OMA, Q value and RIN, RIN & OMA, etc., including 802.3bm standard for multi-mode signals in the TDEC test, as well as 400G PAM4 signal waveform parameters and TDECQ testing.
Keysight BER instruments and other optical instruments can be used to test the stress tolerance of 100G or 400G optical receivers. Keysight is the only manufacturer in the industry that can provide all the stress tolerance test solutions, which ensures smooth upgrading of the test system in the future.
High-speed PAM4 BER
High-speed BER instruments are mainly used to generate high-quality electrical excitation and BER testing for optical transmitter (optical eye diagram) testing, and can also be used to generate electrical signals with jitter and stress for verifying receive tolerance in electrical receiver and optical receiver tolerance testing. If only optical or electrical eye diagram testing is being performed, electrical excitation can be generated using a proven high quality flow tester.
The Keysight M8040A BER is the highest performance, most flexible and easiest to connect NRZ and PAM4 BER on the market.
Its main features and indicators are as follows:
High-speed electrical signal generation: the stand-alone box can generate 1 to 2-way 32Gbps NRZ signal generation, can upgrade the 64Gbps PAM4 signal or 128Gbps PAM4 signal function for 400G module testing.
High-speed telecommunication signal BER detection: the stand-alone box can support 1 to 2-channel 32Gbps NRZ signal BER detection, can upgrade 64Gbps PAM4 signal or 128Gbps PAM4 BER detection function for 400G module testing.
Optical pressure eye test: you can upgrade the optical pressure eye test and auto-calibration function for 100G and 400G optical modules.
Pre-emphasis: Optional built-in 4th order NRZ/PAM4 signal pre-emphasis.
Jitter injection: Optional built-in jitter injection of PJ, RJ, BUJ, etc. for NRZ/PAM4 signals.
Linearity adjustment: 3 eye heights of PAM4 signal can be adjusted independently.
Receiver Equalisation: Built-in adjustable CTLE equaliser for optimising BER reception.
Automatic Jitter Tolerance Test: The jitter frequency and size injected into the signal can be automatically adjusted according to the pre-set parameters, and the jitter tolerance curve can be automatically scanned out according to the BER change.
PRBS code types: 2n-1, n=7, 10, 11, 13, 15, 23, 31, etc.
Custom code length (per channel): 2Gbit (NRZ) or 1G symbols (PAM4).
Data Traffic Tester
Keysight's data test instruments are assembled by inserting test service boards into the tester frame, and provide different test capabilities according to the different test service boards inserted.Novus test service boards provide QSFP28 interfaces, and the K400 test service card provides QSFP_DD test interfaces.
The QSFP28 test service card supports fan-out (i.e., FAN-OUT) capability according to the IEEE protocol, and each QSFP28 interface supports fan-out into four 25GE rate SFP28 interfaces, and the relevant protocol standards are IEEE 802.3 100GBASE-R, IEEE P802.3bj, IEEE P802.3bm, IEEE P802.3bm, IEEE P802.3bm, IEEE P802.3bm, and IEEE P802.3bm. P802.3bj, IEEE P802.3bm, IEEE P802.3by.
K400 test service board supports 400G, 200G, 100G PAM4 rate conversion. Based on QSFP_DD, it supports Forward Error Correction (FEC) port statistics, including: Total Bit Errors, Max Symbol Errors, Corrected Codewords, Total Codewords, Uncorrectable Codewords, Frame Loss Ratio, Pre-FEC Bit Error Rate, and Codeword error distribution analysis; protocol KP4 RS-544.
Supports 400G Forward Error Correction (FEC) error injection.
Support L1 BERT test.