Wireless LAN Test Requirements.docx

1、Wireless LAN Test Requirements1.0 PurposeThe purpose of this document is to describe the test requirements for the Askey Wireless LAN Unit. This requirement is for internal Wireless LAN testing. Test PhilosophyThe philosophy during manufacturing test, which includes In-Circuit and Functional Test, i

2、s to facilitate as much testing as possible at In-Circuit Test where maximum fault isolation may be achieved at a leveraged cost. Functional testing shall then verify basic product functionality from an end-user perspective, i.e. that the unit syncs-up to a Golden sample across a packet transmit, ra

3、te adaptive mode within the specified rate range, at the target margin, and transfers data correctly. Functional test must verify configuration of the device. Sample testing for On-Going Testing (ORT) reliability and Output Quality Control (OQC) audits must be done. 2.0 The Flash Programming Process

4、below illustrate where firmware and programmable code may be installed into the unit. 1. ECN(Engineering Change Notice) and New Product Original Data files must be released when RD released firmware files by email or disk, 2. PE Engineers received the firmware file and confimed the latest ECN3. PE E

5、ngineers verify firmware , confirm checksum and make Master4. PE assistant saving firmware files and Master when verification pass.5. Firmware is rejected and PE engineers give a feedback to RD when verification NG6. TE engineers write SOP7. PD operator borrows Master from PE assistant and make a re

6、cord 8. QC checks the first unit which is maked by PD operator.9. PD operator returns Master within 3 days and PE engineer confirms the Master again. Figure 1. Flash Programming Process3.0 Functional Test Process3.1 GeneralThis section describes the tests executed to complete the functional verifica

7、tion of the Wireless LAN in accordance with the Engineering Test Specification. The test station is designed/built in-house by Askey Test Engineering. The test Equipment is shown in Table1. A Visual Basic test program controls all equipment and connections during the test, and makes Go/No-Go decisio

8、ns. The functional test flow diagram is shown in figure 2.The functional test item is shown in Table 2.PC station block diagram is shown in Figure 3.TX station block diagram is shown in Figure 4.RX station block diagram is shown in Figure 5.Write MAC and Check MAC station block diagram is shown in F

9、igure 6.3.1.1 below illustrate the test equipment list for all functional test stationTable 1. Test Equipment 3.1.2 below illustrate the function test flowchart, the test order is important, shopfloor system will control that every unit must comply with this flowchart and all stations insert test re

10、cord into database.The error code will be shown in the program when you disobey the rule.Figure 2. Funtional Test Flowchart3.1.3 below illustrate the function test item , the function test description is shown in this table Remark: the functional test detail is not constant , all the test criteria i

11、s base on customers requestTable 2. Funtional Test Item.3.1.4 below illustrate PC station block diagram. The shielding boxs isolation is important when wireless LAN unit is tested, because electromagnetic ware disturbing each other that must be prevent in a regular shielding box. Shielding box isola

12、tion must be less to -50dB Dc-Block will be connected with Power meter to protect Power Sensor. The cable loss measure must be exact to assure test quality. Figure 3. PC Station Block Diagram3.1.5 below illustrate TX station block diagram. The shielding boxs isolation is important when wireless LAN

13、unit is tested, because electromagnetic ware disturbing each other that must be prevent in a regular shielding box. Shielding box isolation must be less to -50dB Dc-Block will be connected to protect Spectrum Analyzer The cable loss measure must be exact to assure test quality.Figure 4. TX Station B

14、lock Diagram 3.1.5 below illustrate RX station block diagram. The shielding boxs isolation is important when wireless LAN unit is tested, because electromagnetic ware disturbing each other that must be prevent in a regular shielding box. Shielding box isolation must be less to -50dB The cable loss m

15、easure must be exact to assure test quality.Figure 5. RX Station Block Diagram3.1.6 below illustrate Write MAC and Check MAC station block diagram, Dont change the MAC label arbitrarily. Figure 6. Write MAC & Check MAC Station Block Diagram3.1.7 DUT Interface DescriptionThe DUT is connected to the T

16、est Station using PCI to PCI-E fixtures or cables. Interfaces are provided for power, RF Cable, Ethernet and USB connectors. The wireless DUT interface include PCI, PCI-E, Mini-PCI, Cardbus3.1.8 Log Pass/Fail record with DUT Serial Number to Shopfloor database.3.2 On-Going Reliability Test (ORT)Purp

17、oseThe purpose of this process is to compress a products early mortality period and reduce its failure rate to acceptable levels as quickly as possible. Ideally testing carried out per this procedure will assist in preventing latent part, manufacturing process. Through the use of effective correctiv

18、e actions when failures occur, this process can and will eliminate failures that would otherwise go unchecked with routine quality tests and precipitate themselves in the field. Testing is to take place on existing products with active electronic parts at the post Functional Test stage. This process

19、 provides an early warning indication of a products continued ability to meet operational requirements. Testing is used in addition to routine production tests i.e. Functional, other Quality tests. Testing is considered more extensive than routine production tests.FlowchartFigure 7. ORT Test Flowcha

20、rtFunction TestTest purpose-Confim that normal operation can continuously perform under nomal temperatureTest condition-Testing temperature: 25 (Room temperature)-Testing mode: communication LAN test-Testing sample rate: 6 unitsTX Power Level:Figure 8. ORT TX Power TestTest Method-The DUT turn on th

21、e power, Then perform communication-Evaluation With communication by LAN test program-Using Power Mether make sure product TX power levelBurn-in TestTest Purpose-confirm that the operation performs normally in the temperature range specified in the specifications.Test Condition-Temperature: The max

22、product safety SPEC is per product SPECFigure 9. ORT Test TemperatureTest Method-Set DUT and AC adaptor according to standard setup.-Put these into oven-Set oven temperature in accordance with test condition.-Keep time floow test flow chart.-After test finished check performance and appearance.-Chec

23、k product function and appearance.-Perform Visual check if there is any transformation of Chassis, Rear Panel and Labels etc.ProcedureFully tested Wireless LAN products will be put into a temperature chamber The minimum cycle time should be 24 hours. At a minimum, the units must be monitored for wir

24、eless LAN ping the entire test. Any loss of ping test should be evaluated as a failure.All units must be re-functional tested after the temperature screening to verify wireless LAN operation. Any failures at the post-ORT functional test must be evaluated as ORT failures.ORT Unit Sample Random sample

25、s of production product shall be selected and tested. Sample rate should be approximately 6pcs units each production day for each model.3.3 Output Quality Control Test (OQC)OQCA random sample of 3-5% of production should be re-tested to determine operation of the wireless LAN. This test should be a subset of tests from the functional(RX) test that verifies PER(packet error rate), Sen(sensitivity) and check MAC. These tests should verify only, not perform any configuration of the unit.