Load Match (ELF and ELR)
Description
Load match is a measure of the impedance match of the test port that
terminates the output of a
2-port
device. Load match error terms are
characterized by measuring the reflection
(Sll,
S22)
responses of a “through”
configuration during the calibration procedure.
SignWant
System Components
n
“through” cable
n
cable connectors
n
test port connectors
Affected Measurements
All transmission and reflection measurements of a low insertion loss two-port
devices are most affected by load match errors. Transmission measurements of
lossy devices are also affected.
BTRRT
sg6277d
Figure 11-6. Typical
ELF/ELE
Error Terms
11-15
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