user manual

130 Chapter 9
Service
Automated Performance Tests
SRC MATCH XX Measures reflection at port XX when the port is switched to
the test set’s REFLECTION port, which is terminated with
a precision load. Tests the specified performance of “Source
Match,” listed in Table 8-2 in Chapter 8, “Specifications.”
Steps:
•Set specified frequency for test set.
•Perform reflection 1-port (User 1-port
1
) calibration at end
of cable (using short, open, and load).
•Connect precision load to test set’s REFLECTION port.
•Measure reflection (S
11
1
) at each port XX connected to test
set’s REFLECTION port.
•If spec is 16 dB, trace must be below −16 dB.
LD MATCH INT XX Measures reflection at port XX when the port is terminated
with the internal load (port XX is not switched to either the
test set’s REFLECTION port or TRANSMISSION port).
Tests the specified performance of “Load Match, Test Port
Unselected,” listed in Table 8-2 in Chapter 8,
“Specifications.”
Steps:
•Set specified frequency for test set.
•Perform reflection 1-port (User 1-port
1
) calibration at end
of cable (using short, open, and load).
•Measure reflection (S
11
1
) at each port XX when not
connected to test set’s REFLECTION port or
TRANSMISSION port.
•If spec is 16 dB, trace must be below −16 dB.