
Figure
ELFELR
here.
Figure
11-6.
Typical
ELF/ELR
Transmission
Tracking
(ETF
and
ETR)
Description
T
ransmission
tracking
is
the
dierence
b et
w
een
the
frequency
resp onse
of
the
reference
path
(including
R
input)
and
the
transmission
test
path
(including
A
or
B
input)
while
measuring
transmission.
The
resp onse
of
the
test
p ort
cables
is
included.
These
terms
are
c
haracterized
b
y
measuring
the
transmission
(S21,
S12)
of
the
\thru"
conguration
during
the
error-correction
pro cedure.
Significant
System
Components
R
signal
path
(if
b oth
ETF
and
ETR
and
bad)
A
or
B
input
paths
\thru"
cable
Affected
Measurements
All
transmission
measuremen
ts
are
aected
b
y
transmission
tracking
errors.
11-12
Error
T
erms
DRAFT
3/21/106
15:14
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