17
Operating and installation instructions
RF-KIT Power Amplifier RF2K-S
6. Antenna tuner
6.1. Operation
The LC network in a antenna tuner is to compensate reactive components
and to provide power adjustment, so the antenna radiates supplied TX
power P
eff
via the radiation resistance R.
This requires:
- compensation of reactance jX = j(ωL-1/ωC) of the antenna system
and
- transformation of the effective resistance for power adaptation of the
transmitter to the antenna system.
(Antenna system = a impedance transforming feed line).
Available values of C: Minimal 0.0 pF; Max. 1275 pF
Available values of L: Minimal 0.0 μH; Max. 10,16 μH
The integrated antenna tuner can perform this “at the push of a button“
for you automatically (tuner mode “MAN“). In this case, after touching the
swichting area Tune, the Tuner automatically determines the required
configuration and all settings.
Beside of that, you have the option of performing the tuning process
manually (tuner mode “MAN“) or refine a configuration that has already
been determined before.
Regardless how a setting has been determined, all of the values can be
stored for later retrieval (tuner mode “AUTO“), so a re-tuning process is
superfluous.
A separate database will be created for each antenna socket, in which all
already determined settings for this antenna will be stored.
Depending on the currently selected antenna socket, only settings stored
for this antenna socket will be considered during operation. The antenna
tuner continually checks for the availability of a suitable, already stored
setting for the currently selected antenna socket while tuning a frequency.
NOTE:
If the antenna tuner is activated, but no valid
tuning data is stored yet for the used frequency,
transmitting is not possible!
Indication area
L
(in μH)
Switching area
Tune
Pressing this switching area triggers a tuning process of the antenna
Indication area
Segment-Size
Switching area
K
Selection configuration antenna tuner
Switching area/Indication area
Tuner-Mode
Selection
“AUTO“ (green)
/
“MAN“ (red)
Indication area
C
(in pF)
Switching area
>>
Increase value coarse
Switching area
>
Increase value fine
Switching area
<<
Decrease value coarse
Switching area
<
Decrease value fine
Switching area
Bypass
Selection “Pass“ / “Bypass“
Switching area
Store
Switching area
Reset Tuner
