22
3.
Switch to the
Show all
mode and read the value of capacitance or inductance.
Example 1: Example 2:
Unknown capacitor Unknown inductor
5.3.2. Transformers
RigExpert analyzers can also be used for checking RF transformers. Connect a 50 Ohm
resistor to the secondary coil (for 1:1 transformers) and use
SWR graph
or
R,X graph
modes to check the frequency response of the transformer. Similarly, use resistors with
other values for non-1:1 transformers.
5.3.3. Traps
A
trap
is usually a resonant L-C network used in multi-band antennas. By using a
simple one-turn wire coil a resonant frequency of a trap may be measured.
Example:
A coaxial trap constructed of 5 turns of TV cable (coil diameter is 60 mm) was
measured:
