Agilent Technologies E5022A Operation Manual page 300

Hard disk read/write test system
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Signal[ ]" are converted to 1 and 0 respectively. The obtained data is called
"Normalized Squeezed Noise[ ]."
8. "OTRC SNR[ ]" and "Squeezed SNR[ ]" Calculation, and "OTRC (Unsqueezed
OTRC)" and "Squeezed OTRC" Calculation
a. Calculate "OTRC SNR[ ]" profile from "OTRC Signal[ ]" and "OTRC Noise[ ]."
If OTRCSignal'[ ] > OTRC Noise' [ ]
and OTRC Noise'[ ] + Ng ≠ 0
and Ng + Ni ≠ 0, then
OTRC SNR[ ] =
Else,
OTRC SNR[ ] = 0
where,
OTRCSignal'[ ] =
OTRCNoise'[ ] =
Ng: Gaussian noise constant (user-defined)
Ni: Interference constant (user-defined)
SNg: Gaussian noise of "OTRC Signal[ ]" profile (see "Gaussian Noise Level
Calculation Method" on page 302)
NNg: Gaussian noise of "OTRC Noise[ ]" profile (see "Gaussian Noise Level
Calculation Method" on page 302)
addNoise: 1 or 0 (user-defined)
b. Calculate "Squeezed SNR[ ]" profile from "Squeezed Signal[ ]" and "Squeezed
Noise[ ]."
If Squeezed Signal'[ ] > Squeezed Noise' [ ]
and Squeezed Noise'[ ] + Ng ≠ 0
and Ng + Ni ≠ 0, then
Squeezed SNR[ ] =
Else,
Squeezed SNR[ ] = 0
where,
Squeezed Signal'[ ] =
Squeezed Noise'[ ] =
Ng: Gaussian noise constant (user-defined)
Ni: Interference constant (user-defined)
SNg: Gaussian noise of "Squeezed Signal[ ]" profile (see "Gaussian Noise Level
Calculation Method" on page 302)
NNg: Gaussian noise of "Squeezed Noise[ ]" profile (see "Gaussian Noise Level
Calculation Method" on page 302)
addNoise: 1 or 0 (user-defined)
c. Calculate "OTRC (Unsqueezed OTRC)" value from "OTRC SNR[ ]" profile (see
Figure 5-50).
Chapter 5
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Parametric Sweep Measurement Definitions
2
OTRCSignal'[ ]
+
×
10
log
----------------------------------------------------------------------------------------------------
(
OTRCNoise'[ ] Ni
×
2
2
OTRCSignal[ ]
Ð
SNg
2
2
OTRCNoise[ ]
Ð
NNg
SqueezedSignal'[ ]
×
10
log
------------------------------------------------------------------------------------------------------------ -
(
SqueezedNoise'[ ] Ni
2
SqueezedSignal[ ]
2
SqueezedNoise[ ]
Ð
Measurement Definition
2
×
addNoise SNg
2
2
)
(
×
)
+
NNg Ng
2
2
×
+
addNoise SNg
2
2
×
)
(
×
)
+
NNg Ng
2
Ð
SNg
2
NNg
299

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