Transmission Tracking (ETF and ETE)
Description
Transmission tracking is the difference between the frequency response of the
reference path (including R input) and the transmission test path (including
A or B input) while measuring transmission. The response of the test port cables
is included. These terms are characterized by measuring the transmission
(S21,
S12)
of the “through” configuration during the error-correction procedure.
Significant System Components
n
R signal path (if both ETF and ETR are bad)
n
A or B input paths
n
“through” cable
Affected Measurements
All transmission measurements are affected by transmission tracking errors.
sg6278d
Figure 11-7.
Typical
ETF/ETR
11-16 Error
Terms
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