Focus Microwaves ituner - 4.5 Constant VSWR Commands

iTuner Manual
39
 Prematch section (PMT only)
 Tuning section
 Termination
S-parameter data are shown for all primary and secondary frequencies.
The DUMP command can be called while the tuner is moving, the current probe
position is included in the display.
Examples:
DUMP
Current Configuration:
TUNER: x=1000 y=3210
1000.000MHz:
Term 0.0000 0.00
Tuner 0.8861 12.48 0.4529 -49.92 0.4529 -49.92 0.8792 67.64
Adapter 0.0000 0.00 1.0000 0.00 1.0000 0.00 0.0000 0.00
2000.000MHz:
Term 0.0000 0.00
Tuner 0.9527 163.22 0.2653 -51.19 0.2653 -51.19 0.9429 -86.40
Adapter 0.0000 0.00 1.0000 0.00 1.0000 0.00 0.0000 0.00
3000.000MHz:
Term 0.0000 0.00
Tuner 0.9617 -36.28 0.2037 -43.17 0.2037 -43.17 0.9527 127.98
Adapter 0.0000 0.00 1.0000 0.00 1.0000 0.00 0.0000 0.00
Use the RESET command to clear all calibration data, adapter and term definitions.
4.5 Constant VSWR Commands
A special group of commands are designed to make constant VSWR testing straightforward
while taking full advantage of the iTuners’ tuning and de-embedding capabilities. The VSWR
family of commands of the iTuner automatically re-adjusts the vertical probe position to keep
the VSWR seen by the DUT constant during phase sweep.
The VSWR tuning routines always start testing at the ‘horizontal zero’ position for several
reasons:
 Maximum achievable VSWR is always highest when the probe is positioned as close as
possible to the DUT.