Confidential

TPMS

RF Peak Power Variations &

Process Capability Study

Prepared by : SK Ng

Confidential

TPMS Process Variations Study

RF Peak Power dropped 13.6dBm from Assembly process (E) to Complete unit (H).

No SERIALNUMBER

(A) BLT - PCBA w/o antenna

(B) BLT - PCBA with

antenna© BLT- B +

Battery

(E) Complete Final - (D) +

Hosing + Screw

(F) Complete Final - (E) +

Valve

(G) Complete Final - (F) + Component

gluing

(H) Complete Final - (G) +

Bottom Gluing

1 0919TA00053 -25.576 8.601 8.86 -27.814 -37.188 -41.706 -45.83

2 0919TA00041 -25.524 8.548 9.17 -29.377 -40.14 -45.088 -48.131

3 0919TA00042 -25.449 9.924 10.75 -28.988 -33.03 -37.165 -46.752

4 0919TA00045 -25.089 9.027 9.53 -28.679 -39.881 -43.213 -46.449

5 0919TA00050 -24.582 9.911 10.34 -30.169 -35.059 -38.234 -41.998

6 0919TA00029 -25.807 9.179 9.5 -31.948 -31.148 -33.631 -40.138

7 0919TA00011 -24.973 9.816 10.28 -26.493 -37.643 -43.265 -45.581

8 0919TA00007 -24.853 7.476 7.87 -41.485 -45.788 -48.642 -50.158

9 0919TA00034 -26.17 8.241 8.68 -35.758 -30.362 -32.821 -40.101

10 0919TA00036 -24.859 10.063 10.41 -28.239 -34.01 -34.347 -40.143Min -26.17 7.48 7.87 -41.49 -45.79 -48.64 -50.16Ave -25.29 9.08 9.54 -30.90 -36.42 -39.81 -44.53Max -24.58 10.06 10.75 -26.49 -30.36 -32.82 -40.10Stdev 0.50 0.86 0.92 4.52 4.71 5.37 3.66Delta (Ave) 34.37 0.46 -5.53 -3.39 -4.72

Confidential

10987654321Sample

__X=9.079

0

0

+3 StDev=11.8888

-3 StDev=6.2698

+2 StDev=10.9514

-2 StDev=7.2064

+1 StDev=10.0152

-1 StDev=8.1422

2

2

2

000

0

0

00

Zone Chart of (B) BLT - PCBA with antenna

Within 3 sigma level.

10987654321Sample

__X=9.539

0

0

+3 StDev=12.6398

-3 StDev=6.4398

+2 StDev=11.6064

-2 StDev=7.4724

+1 StDev=10.5722

-1 StDev=8.5062

0

2

2

0

0

0

0

2

00

Zone Chart of © BLT- B + Battery

10987654321Sample

__X=-25.288

0

0

+3 StDev=-23.5748

-3 StDev=-27.0028

+2 StDev=-24.1454

-2 StDev=-26.4314

+1 StDev=-24.7172

-1 StDev=-25.8602

0

2

00

0

2

0

000

Zone Chart of (A) BLT - PCBA w/ o antenna

Confidential

10987654321Sample

__X=-44.53

0

0

+3 StDev=-35.548

-3 StDev=-53.528

+2 StDev=-38.544

-2 StDev=-50.524

+1 StDev=-41.532

-1 StDev=-47.522

42

2

0

2

0

22

2

0

Zone Chart of H (Complete Final and Bottom Glue)

10987654321Sample

__X=-30.90

0

0

+3 StDev=-19.308

-3 StDev=-42.498

+2 StDev=-23.174

-2 StDev=-38.624

+1 StDev=-27.032

-1 StDev=-34.762

0

6

4

2

0

00000

Zone Chart of (E) Complete Final - (D) + Hosi

10987654321Sample

__X=-39.81

0

0

+3 StDev=-22.298

-3 StDev=-57.338

+2 StDev=-28.134

-2 StDev=-51.494

+1 StDev=-33.972

-1 StDev=-45.652

2

2

2

0

2

0

0

0

00

Zone Chart of (G) Complete Final - (F) + Comp

10987654321Sample

__X=-39.81

0

0

+3 StDev=-22.298

-3 StDev=-57.338

+2 StDev=-28.134

-2 StDev=-51.494

+1 StDev=-33.972

-1 StDev=-45.652

2

2

2

0

2

0

0

0

00

Zone Chart of (G) Complete Final - (F) + Comp

Confidential

Only observed one Outlier on Process (E). Units-to-Units variation

is minimum.

10

0

-10

-20

-30

-40

-50

dbm

TPMS Variation Study

Confidential

Capability Study

-32-36-40-44-48-52

LSL USL

LSL -43Target *USL -30Sample Mean -44.5281Sample N 10StDev(Within) 2.99576StDev(Overall) 3.66088

Process Data

Cp 0.72CPL -0.17CPU 1.62Cpk -0.17

Pp 0.59PPL -0.14PPU 1.32Ppk -0.14Cpm *

Overall Capability

Potential (Within) Capability

% < LSL 60.00% > USL 0.00% Total 60.00

Observed Performance% < LSL 69.50% > USL 0.00% Total 69.50

Exp. Within Performance% < LSL 66.18% > USL 0.00% Total 66.18

Exp. Overall Performance

WithinOverall

Process Capability of (H) Complete Final - (G) + Bott

-36-40-44-48-52

LSL USL

LSL -55

Target *USL -33

Sample Mean -44.5281Sample N 10

StDev(Within) 2.99576

StDev(Overall) 3.66088

Process Data

Cp 1.22

CPL 1.17CPU 1.28

Cpk 1.17

Pp 1.00

PPL 0.95

PPU 1.05Ppk 0.95

Cpm *

Overall Capability

Potential (Within) Capability

% < LSL 0.00

% > USL 0.00% Total 0.00

Observed Performance

% < LSL 0.02

% > USL 0.01% Total 0.03

Exp. Within Performance

% < LSL 0.21

% > USL 0.08% Total 0.29

Exp. Overall Performance

WithinOverall

Process Capability of (H) Complete Final - (G) + Bott

Based on the data, the Process Variations for RF Peak Power is acceptable. Cpk is 1.17 when use production specification. Cpk is -0.17 when use FUT spec as the process is not centered to the target. To meet the require specification base on FUT test, improvement require to shift the process mean to target.

Production Spec. Require Spec base on FUT test

Average 44.5281, Variation 3.66, Z score 2.86