Agilent Technologies E5022A Operation Manual page 274

Hard disk read/write test system
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16. Calculate the average TAA = Sum_TAA/ n
17. Next sense current go to step 8.
18. Next read offset go to step 7.
19. For ib_index = 0 to (ib_points-1)
20. Calculate the SHNR data as;
SHNR_DATA(ib_index) = 20log (Max (Aver_TAA[ib_index]) / Noise_Ref[ib_index])
Equation 5-25
Calculation of SHNR
21. Next sense current go to step 19.
22. Denote SHNR as the maximum SHNR from the data array (i.e, SHNR = Max
(SHNR_DATA[]).
Chapter 5
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MaxAverTAA
-----------------------------------
SHNRdata
=
20
log
Measurement Definition
Measurement Parameter Definition
NoiseRef
273

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