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ARUBA JL307A High Speed Cable Sample Report

Time: 2024-11-08
        Aruba has model JL307A high-speed cable products, which can support 100G Ethernet short distance applications, Moduletek Limited Labs tested the product samples to facilitate further understanding of the product's performance indicators and the actual machine use effect.
1. Product Description
        Aruba JL307A high-speed cable supports 3m link length on 100G copper cable. The official key parameters and the physical appearance of the module are as follows:
Table 1 Aruba JL307A Official Description
 Model Number   Description
  JL307A    Aruba 100G QSFP28-QSFP28 3m DAC Cable

Aruba JL307A Physical Appearance
 
Figure 1 Aruba JL307A Physical Appearance
2. Module on-board identification
        Connect the JL307A high-speed cable to the Aruba 8325-48y8c switch, the module can be LINKed normally and the port indicator lights up; the module information at both ends of the cable can be recognized normally by the switch, such as module type, model, vendor name, serial number, transmission distance, etc.; there is no alarm phenomenon.
Table 2 Aruba JL307A on-board identification
Item  Information read by the switch
Interface indicator

LINK

Identify

FEC mode

 
3. Module Key Parameter Test
3.1 S-parameter Test
        The S-parameters of the module at both ends of the cable are tested using a network analyzer at room temperature, and the test results are as follows;
Table 3 Aruba JL307A S-parameter curve
  Direction Reflection curve (SDD11) Insertion loss curve (SDD21)
A end to B end (Channel 1)

B end to A end (Channel 1)

 

 
        Note: ①The above S-parameter curves are extracted from the curve diagram of Channel 1 of the module for reference;
                  ② The insertion loss standard refers to IEEE802.3 version 2022 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 IEEE 802.3 2022 Edition 110.10 Cable Insertion Loss Classification Standard, Aruba JL307A with maximum insertion loss value of 13.79dB is compliant with the insertion loss class CA-25G-N (Cable assembly no-FEC), which is supported for use between two PHYs operating in no-FEC mode, more information about the cable class descriptions can be found at 25G DAC FEC Class Description.
3.2 Impedance Test
        The differential impedance of the modules at both ends of the cable was tested using an oscilloscope at room temperature, and the test data complied with the 100 ohm differential impedance standard, and the test data of one of the channels is listed below;
Table 4 Aruba JL307A Cable Impedance Data
  Module 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 situation, the module's key parameters and indexes are in line with Aruba's official claims.

        Moduletek Limited is at your service.

        If you have any questions about the above content, you can contact us by Email : web@moduletek.com

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