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Mellanox MMA2L20-AR Optical Module Sample Report

Time: 2024-03-13
        NVIDIA/Mellanox offers the MMA2L20-AR optical transceiver, which supports 25G Ethernet transmission up to 10 km over single-mode fiber (SMF). Moduletek Laboratory tested this sample module to help you fully understand its performance indicators and actual application performance on network cards.
1. Product Overview
        The Mellanox MMA2L20-AR optical transceiver supports a maximum link length of 10 km over standard ITU-T G.652.D single-mode fiber (SMF) at 25G rate. Official key parameters and the physical appearance of the module are as follows:
Table 1 Official Specifications
  Ordering Part Number
  Description
  MMA2L2O-AR
  Optical transceiver, 25GbE, 25Gb/s, SFP28,LC-LC, 1310nm, LR up to 10km
  Parameter
Min
Type
Max
Units
Notes
  Power Supply Voltage
3.135
3.3
3.465
V
---
  Power consumption
---
---
1.5
W
---
  Operating case temperature
0
---
70
℃
---
  Link Distance with ITU-T G.652.D
0.002
---
10
km
---
  Average launch power
-7
---
2
dBm
---
  Receiver Sensitivity (OMA)
---
---
-12
dBm
1
  Stressed Receiver Sensitivity (OMA)
---
---
-9.5
dBm
2
  Notes:
  1.Hit ratio 5x10-5per sample.
  2.Measured with conformance test signal at receiver input for BER =5x10-5.

MELLANOX MMA2L20-AR Optical Module Physical Picture
Figure 1 Physical Image
2. On-NIC Identification Test
        The MMA2L20-AR module was inserted into a Mellanox MCX4121A-ACAT network interface card (NIC) and connected with a patch cord. The module achieved normal link status with the port indicator illuminated. The NIC correctly identified complete module information, including module type, model, manufacturer name, serial number, wavelength, and transmission distance. DOM data was readable, with all values within the normal threshold range and no alarms reported. When the interface was set to automatic FEC mode, it adaptively switched to FC-FEC mode.
Table 2 On-NIC Identification Results
Item
 Information Read from Server/NIC
LINK
Identification 
DOM Data
3. Key Performance Parameter Test
    a. Performance Indicator Test
        All tests were conducted with the module case temperature stabilized at 45℃ on a professional test fixture. The test results are shown below:
Table 3 Performance Indicators
  Parameter
Test Data
Unit
Remarks
  Transmit Optical Power
-2.8
dBm
 
  Receiving Sensitivity (without fiber)
-17.5
dBm
 5E-5 BER
  Receiving Sensitivity (with 10km fiber)
-17.6
dBm
 5E-5 BER
  Power Consumption
0.9
W
 
    b. Eye Diagram Test
        Eye diagram tests were performed at a module case temperature of 45℃. The eye diagram and its parameters are shown below:
MELLANOX MMA2L20-AR Optical Module Eye Diagrams
Figure 2 Eye Diagram

Table 4 Eye Diagram Parameters
Temperature (℃)  
Extinction Ratio (dB)
 P-P Jitter (ps) 
Rise Time (ps) 
Fall Time (ps)
Margin Value (%)
45
4.51
12.6
16.44
19.32
11.5
        Actual test results show that all key performance indicators of this sample module are consistent with Mellanox’s official specifications.
        Moduletek sincerely serves you!
        For further inquiries about the above content, please contact us at: sales@moduletek.com
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