What's New
             ==========

Aug 28, 2011 version 530
1. TDR function has been added
2. Alternate colors during Rescan and Recycle.
3. Crystal measurement procedure has been improved.


Mar 3, 2011 version 520J
1. Fixed a problem with the crystal measurement routine.

Aug 30, 2010 version 520
1. Fixed a problem with the config file that caused the program to sometimes hang up.
 

Aug 24, 2010 version 514C

1. External control function has been upgraded so it doesn't use as much of the cpu time.
2. Custom calibration has been fixed so the scan range can be as large as the calibration range.


April 5, 2010 version 440A

1. Updated manual in pdf format is linked from the Help menu.
2. Low current mode option.
3. Fixed Smith Chart in Point data mode.
4. Set default averaging for custom cal to 4x.
5. CSV file for Port B is implemented.
6. In custom cal mode, the number of cal points can be entered instead of freq.
7. SWR=1 can be set above the X axis or on the X axis (config file option)
8. New dialog to enter Averaging value
9. Delay smoothing can be entered as a percentage of scan width
10. Delay time can be entered to offset phase shift of S21.


Jan 22, 2010 version 430

1. Plot S21 phase before S21mag so mag plot is on top.
2. Fixed average value used to autorange in Scan B. 
3. Output amplitude can be set in the Constant Freq mode.
4. Fixed hardware hang up after recycling for several minutes.


Jan 8, 2010  Version 420

1.  Increase number of custom cal points and scan points from 1000 to 30000.
2.  Select graph colors from setup menu. Config file has the default colors.
3.  New buttons and tooltips for some functions on the right side of the screen.
    (Click the button to change the parameter.)
4.  During calibration (both standard and custom cal), the averaging default
    value is 4x. User can specify up to 256x.
5.  Bold or regular print can be specified in the config file for data on the screen. (default is bold).
6.  Port B functions on the Menu are grayed out if Port B is not selected.
7.  Default graph size can be specified in config file.
8.  Standard cal uses parabolic interpolation with 0.2MHz cal interval.
9.  Custom cal uses parabolic interpolation with user specified cal interval.
10. Interpolation can be turned on or off.
11. Display cal parameters when either Standard or Custom cal file is loaded.
12. The manual has been updated.


Nov 19,'09   Version 412

 1. Graph window can be resized with the mouse.
 2. SWR plot begins with SWR=1 on the horizontal axis.
 3. Scan width can be as small as 1KHz.
 4. Save Port A and Port B scan files.
 5. Enter separate comments for port A and port B.
 6. Combine cal A and B and save to a user specified file.
 7. Driver output amplitude can be specified when using Custom Cal.
 8. Group delay is plotted using the S21 phase data.
 9. Plot S11 on the same graph with S21.
10. Manual has been updated.
11. Default comm port is 6.


Oct 8,'09  VERSION 400C

1. Fixed custom cal to remove error message indicating an index value was out of range.
2. Fixed the "Cal Required" message that popped up when the program was first loaded.
3. Changed Q measurement routine so it works down to 10KHz.(before it was limited to 100KHz)
4. User can specify the zero db reference line for Port B. This is useful for increasing the range of the
   plotted graph and compensating for offset introduced by external attenuators or amplifiers.
5. When the custom cal file is loaded, there is an option to change the scan limits to the same values used
   for the custom cal file. The scan limits actually used can still be different from the custom cal
   limits as long as the start/stop values are within the custom cal limits. The custom cal parameters
   can be quickly reviewed by clicking the "Status" button at the bottom of the screen.


Oct 3,'09   VERSION 400A

1. After doing custom cal, set the start/stop/step values to the custom cal values that were just entered.
2. Option to cal port B after cal'ing port A. This will use the same driver amplitude value.
3. Custom cal options for Amplitude and High Noise immunity for port A measuremetns.
4. Filter bandwidth and shape factor is found by positioning cursor near the middle of the response curve (Port B).
5. Port B relay is closed when scanning Port A.  This provides a 50 ohm termination for filters.
6. Scan limits are the same for A and B.
7. Save scan files for both A and B and flip back and forth with arrow keys.
8. Band scan is enabled. There are two ranges with the sensitivity differing by a factor of 12dB.
9. Markers now work for Port B.
10. Fixed a problem in the Calibrate A routine. A parameter was not being initiallized.