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Aruba R0Z25A High-Speed Cable Sample Report

Time: 2024-11-18
        Aruba launches the R0Z25A high-speed DAC cable, designed for short-distance 100G Ethernet applications. Moduletek Laboratory has conducted prototype testing on this product to fully evaluate its performance specifications and actual deployment performance.
1. Product Introduction
        The Aruba R0Z25A high-speed cable supports a 1-meter transmission distance for 100G copper connections. The official key specifications and physical appearance are shown below.
Table 1 Official Specifications
  Model Number
  Description
  R0Z25A
  Aruba 100G QSFP28-QSFP28 1m DAC Cable

Aruba R0Z25A physical appearance
Figure 1 Physical Appearance
2. Cable Identification Test
        Connect the R0Z25A high-speed cable to an Aruba 8325-48y8c switch. The link connects normally and port indicators light up. The switch can accurately read cable information from both ends, including cable type, model, vendor, serial number and transmission distance. No system alarms are generated.
Table 2 On-Board Identification
Item
 Information Read by the Switch
Interface Indicator
LINK
Identification
FEC Mode
3. Key Performance Test
    3.1 S-Parameter Test
        At room temperature, a network analyzer was used to test the S-parameters of both cable ends. The test results are as follows:
Table 3  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 based on Channel 1 data for reference only.
② Insertion loss compliance standard: IEEE 802.3-2022 Clause 110.10; IL＜22.48dB @ 12.89GHz.
Table 4  S-Parameter Test Data
Parameter
Direction
Channel
Judgment Criteria
1
2
3
4
SDD11(dB)
End A to End B
-17.47
-26.50
-26.34
-17.04
<-6.6644dB
End B to End A
-28.10
-22.09
-21.06
-15.86
IL(dB)
End A to End B
8.60
10.04
7.70
8.20
<22.48dB（CA-25G-L）
<16.48dB（CA-25G-S）
<15.5dB（CA-25G-N）
End B to End A
8.25
8.73
8.43
7.92

        In accordance with the IEEE 802.3-2022 cable insertion loss classification, the maximum insertion loss of the Aruba R0Z25A is 10.04dB, which meets the CA-25G-N no-FEC cable standard. It is suitable for interconnection between two PHYs operating without FEC. For detailed cable classification descriptions, please refer to the Classification Of 25G DAC FEC Classes .

    3.2 Differential Impedance Test
        An oscilloscope was used to test the differential impedance of both cable ends at room temperature. All test results meet the 100 ohm differential impedance requirement. Partial channel test data are listed below.
Table 5 Impedance Data
  Module
Differential Signal Direction
Max (Ω)
Min (Ω)
 Average (ohm)
End A
(Channel 1）
TX
103.87
96.50
101.30
RX
102.73
95.85
100.45
End B
（Channel 1）
TX
103.47
97.33
101.70
RX
103.38
95.63
100.83
Conclusion
        All key performance parameters of the Aruba R0Z25A high-speed cable fully comply with Aruba’s official specifications.
        Moduletek Limited is at your service.
        For further inquiries about the above content, please contact us at: sales@moduletek.com
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