* Version 1.0.6 PNA4500 
	Date : 2016-04-28
	Info :
		- if On Screen Keyboard disabled => the icon is not visible
		- On screen Keyboard active in "Save As" into Report
		- Marker:  'on/off button' for a selected marker put the marker off 
		- DTF-File-Save-Trace: now saves a trace in s1p format. Added into trace file Dielectric value.
		- DTF - Load File: decode the Dielectric value saved and if it is different from the actual Dielecric ask you to change it.
		- DTF - Load File: new value for Dieletric Value or Range in Load file mode set "DTF Mode " to Auto mode
		- DTF - File -Save : added Operator and Site info. This info are saved into Report and into Trace
		- DTF - Setup -Calibration: when you press Done sw go to setup menu and show DTF
		- DTF - File-Preset -Load: added Delete preset
		- VNA - Setup : new value of Filter BW or Point set Sweep Time to minimun value
		- VNA - Marker Coupled improvements.
		
Dieletric.xml file: put this file into \Documents\PROTECS\PNA4500 directory to show a Cable list for different Dieletricum.
You can add new cables in the file: change the number of cable into tab <NCABLE> and then add at the end of the file 
new tag <CABLExx value="LMR-1700" /> <VFxx value="0.89" /> with the Cable Name and Value.


* Version 1.0.4 PNA4500 
	Date : 2016-04-21
	Info :
		- new logo Protecs
		- added button "Keyboard on screen" Enable on Setup menu and added keyboard image on form
		- S11/SWR scale : now 0.2 0.5 /div
		- Report File SWR mode: SWR values shown
		- New Marker Menu (added Delta, Min/MAx and Track functions)
		- Report DTF: added distance
		- UI refresh eliminated
		- Added "Span min" on VNA mode (Start menu) as similar CW function
		- Calibration only with S11, if Format is SWR revert to s11 for calibration