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another RF port already connected to a standard load; the standard load is
replaceable.
In other files, as shown in chart 2-4, the ports from left to right are named Port 2,
Port 3 and Port 1.
The N type measuring port has a precise surface which needs to be protected,
especially the S11 port from the right side. Use only quality connectors and always
check before connecting. If the core needle is sticking out too long or bent, fix it
before making the connection. However, it's not necessary to connect an adaptor just
for protecting the ports. Extra adaptors will worsen the accuracy.
The designed lifetime of RF ports is 500 times plug in/pull out. Ports' aging has
certain influence on the accuracy of the vector measurement. Please replace the port
connector when the old one is out of its useful lifetime.

2.3 Auxiliary Ports

There are four ports at the right side as the following picture shows. From left to
right: TF card slot, RJ45 Ethernet port, power input jack, and USB port. (Shown as
Chart 2-5)
Chart 2-4 Signal ports on top
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