Deepace KC908 Manual page 11

There are 2 RF ports on the top of KC908, left port is PORT1, right port is
PORT2. Both ports support input and output. Two LEDs in the middle of two
ports are used as indicators to show witch port is selected.
Both RF ports(adopt K type positive connector, also known as 2.92
connector) support SMA standards and are mounted on the PCB directly. The
PCB, metal shell and metal cavity support the RF ports. Shield of RF ports can
withstand a 1Nm bending force for a prolonged period, yet the core pin is
much weaker, which can only withstand a 1N force or 0.02Nm torque (deem
the smaller one as the limit). And the max tightening torque is 0.7Nm, in
actual test the user just need to tighten it slightly with finger.
Attention:
SMA connector is weak, user needs to use soft cable or antenna to
connect. User should avoid dragging antenna or cable which is connected to
KC908. Disconnect the antenna or cable when KC908 is not being used, to
avoid accidental impact. User must use high quality and right size connectors
and never rotate the SMA core pin when connect to KC908.
2.1.1 PORT 1 (Left Port)
Port 1 supports 9kHz - 6GHz range input, and 9kHz-10.8/18.6GHz range
output. The output comes with necessary filtering, and 18.6Ghz model is
equipped with a synchronous tuning filter for 6-18.6GHz. The receiving