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ARUBA R0Z25A High Speed Cable Sample Report

Time: 2024-11-08
        Aruba company has model R0Z25A high-speed cable products, can support 100G Ethernet short distance applications, Moduletek Laboratory of the product prototype testing, to facilitate further understanding of the product's performance indicators and the effect of the actual machine use.
1.Product Introduction
        Aruba R0Z25A high-speed cable supports 1m link length on 100G copper cable. The official key parameters and the physical appearance of the module are as follows:
Table 1 Aruba R0Z25A Official Description
  Model Number
  Description
  R0Z25A
  Aruba 100G QSFP28-QSFP28 1m DAC Cable

Aruba R0Z25A physical appearance
Figure 1 Aruba R0Z25A physical appearance
2. Module identification
        Connect the R0Z25A 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 R0Z25A 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 R0Z25A 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 R0Z25A S-parameter 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

        According to IEEE 802.3 2022 Edition 110.10 Cable Insertion Loss Class Classification Standard, Aruba R0Z25A has a maximum insertion loss value of 10.04dB, which is compliant with the insertion loss class CA-25G-N (Cable assembly no-FEC), and is supported to be used between two PHYs that are 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 5 Aruba R0Z25A Cable Impedance Data
  Module
Differential Signal Direction
Maximum (ohm)
Minimum (ohm)
 Average (ohm)
A End
(Channel 1）
TX
103.87
96.50
101.30
RX
102.73
95.85
100.45
B End
（Channel 1）
TX
103.47
97.33
101.70
RX
103.38
95.63
100.83

        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, please contact us via email: sales@moduletek.com
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