User’s manual
Antennas
Checking the antenna
It is a good idea to check an antenna
before connecting it to the receiving or
transmitting equipment. The
SWR chart
mode is good for this purpose.
The picture on the left shows the SWR
chart of a HF antenna. The operating
frequency is 14.3 MHz. The SWR at
this frequency is about 1.3, which is
acceptable.
The next screen shot shows SWR chart
of another antenna. The actual resonant
frequency is about 14.65 MHz, which is
too far from the desired one. The SWR at
14.3 MHz is 2.8, which is not acceptable
in most cases.
12
Applications
Summary of Contents for AA-35 ZOOM
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