iTuner Manual
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high values. Because of the limited VSWR range of the tuner, and loss in the adapter section, you
may not be capable to reach you desired VSWR.
The following section explains all the tuning related commands in detail.
4.4.2 Tuning and Impedance Query commands
All tuning and impedance query commands require a valid calibration to be loaded from flash
into the RAM memory of the microcontroller. (see LOADFREQ and LOADCAL).
Once a calibration has been loaded, you may send any of the tuning or the impedance query
commands.
The two tuning commands (TuneTo and TuneVSWR) calculated the probe position for the
specified goal, and will move the probe to the new position.
If you just want to know the corresponding position without actually moving the probe, use the
TuneTo? or TuneVSWR? Command.
There are two groups of impedance query commands, the first group uses the current probe
position to calculate the impedance values, while the second group use probe position values
specified.
The first group includes the following commands: GAMMA? , VSWR?, SPAR? And DUMP.
The second group includes: GAMMA_AT?, VSWR_AT?, SPAR_AT? And DUMP_AT?
These commands require two parameters when called: xpos and ypos.
4.4.3 Mode Command
Call MODE to set the tuning mode
The MODE commands sets the tuning mode. Use the CONFIG command to verify
the current setting of mode.
The mode setting determines the tuning reference plane, as well as the loss
calculation definition:
MODE LOAD: loss calculated using POWER GAIN definition
MODE SOURCE: loss calculated using AVAILABLE GAIN definition
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