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Aruba JL307A High-Speed Cable Sample Report

Time: 2024-11-08
        Aruba offers the JL307A high-speed cable, which supports short-distance 100G Ethernet applications. Moduletek Laboratory conducted sampling tests on this product to further understand its performance indicators and real-world application effect.
1. Product Description
        The Aruba JL307A high-speed cable supports a 3m link length for 100G copper transmission. The official key parameters and physical appearance of the cable are as follows:
Table 1 Aruba JL307A Official Specifications
  Model Number   Description
  JL307A   Aruba 100G QSFP28-QSFP28 3m DAC Cable

Aruba JL307A Physical Appearance
Figure 1 Aruba JL307A Physical Appearance
2. On-Board Identification Test
        Connect the JL307A high-speed cable to an Aruba 8325-48y8c switch. The cable can establish a normal link, and the port indicator lights up. The switch can normally recognize the cable information at both ends, including cable type, model, vendor name, serial number, and transmission distance, with no alarm phenomenon.
Table 2 Aruba JL307A On-Board Identification Data
Item  Information Read by the Switch
Interface Indicator

LINK

Identification
FEC Mode
3. Key Parameter Testing
    3.1 S-Parameter Test
        At room temperature, a network analyzer was used to test the S-parameters of the cable at both ends. The test results are as follows:
Table 3 Aruba JL307A S-Parameter Curves
  Direction Reflection curve (SDD11) Insertion loss curve (SDD21)
End A to End B (Channel 1)

End B to End A (Channel 1)

Note: ① The above S-parameter curves are extracted from the curve diagram of Channel 1 of the cable for reference;
          ② The insertion loss standard refers to IEEE 802.3 2022 Edition 110.10: IL < 22.48dB @ 12.89GHz.
Table 4 Aruba JL307A S-Parameter Data
Parameter Direction Channel Judgment Criteria
1 2 3 4
SDD11(dB) End A to End B -24.62 -20.59 -27.08 -22.65 <-6.6644dB
End B to End A -20.41 -20.62 -32.57 -29.58
IL(dB) End A to End B 13.79 13.62 12.67 12.09 <22.48dB（CA-25G-L）
<16.48dB（CA-25G-S）
<15.5dB（CA-25G-N）
End B to End A 13.54 13.79 12.66 12.72
        According to the IEEE 802.3 2022 Edition 110.10 Cable Insertion Loss Classification Standard, the Aruba JL307A has a maximum insertion loss of 13.79dB, which complies with the insertion loss class CA-25G-N (Cable Assembly No-FEC). This class is suitable for use between two PHYs operating in no-FEC mode. For more information about cable class descriptions, refer to the Classification Of 25G DAC FEC Classes.
    3.2 Impedance Test
        At room temperature, an oscilloscope was used to test the differential impedance of the cable at both ends. The test data complies with the 100-ohm differential impedance standard. The test data for one of the channels is listed below:
Table 5 Aruba JL307A Cable Impedance Data
Cable End Differential Signal
Direction		 Maximum value
(ohm)		 Minimum Value (ohm) Average value (ohm)
A (Channel 1) TX 104.45 95.74 100.09
RX 104.04 94.81 99.43
B (Channel 1) TX 105.03 96.92 100.97
RX 104.82 95.66 99.74
        From the actual test results, all key parameters and indicators of the Aruba JL307A high-speed cable are consistent with Aruba’s official claims.
        Moduletek Limited is at your service.
        For further inquiries about the above content, please contact us at: sales@moduletek.com
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