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Measurement Definition
Measurement Parameter Definition
SNR Definition The Agilent E5022/E5023 uses several periods of the waveform, when
averaging factor is specified, SNR will be defined as:
Equation 5-17
SNR Calculation Formula
Where N = The length of Pseudo Random Bit Sequence, m= averaging factor (Specified by
the "hpe5022_waveAverage" function.), the formula of r[] is shown in "Correlation
Definition".
Time Correlation Definition The formula in computing Time Correlation is shown
below.
Equation 5-18
Time Correlation Calculation Formula
TimeCorrelation
Where N = The length of Pseudo Random Bit Sequence, m= averaging factor (Specified by
the "hpe5022_waveAverage" function.), the formula of r[] is shown in "Correlation
Definition".
NLTS Definition NLTS is defined as:
Equation 5-19
NLTS Calculation Formula
NLTS
Where D is the specified Delay (echo location), N = The length of Pseudo Random Bit
Sequence, m= averaging factor (Specified by the "hpe5022_waveAverage" function), the
formula of r[] is shown in "Correlation Definition".
Correlation Definition Correlation is defined as:
260
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m
Ð
1
1
∑
SNR
=
------------- -
-------------------------------------------------------- -
m
Ð
1
1
Ð
n
=
1
1
=
------------- -
m
Ð
m
Ð
1
2
∑
V t ( ) V t
=
Ð
------------- -
r
[
,
m
Ð
1
n
=
1
r V t ( ) V t
(
)
[
,
+
nNT
]
r V t ( ) V t
(
)
[
,
+
nNT
]
m
Ð
1
∑
r V t ( ) V t
(
[
,
+
nNT
1
n
=
1
(
)
+
nNT
+
D
] 1
+
---------- -
SNR
)
]
T
1
Chapter 5
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