MMSSTV  Ver 1.05 - What's New

What's new in MMSSTV Ver1.05
September 22, 2001

JE3HHT Makoto Mori
Translated into English by JA7UDE Oba

**********************************************************************
Revision history Ver1.04 -> Ver1.05
**********************************************************************
- Added two window layouts
- Added an optional window for the control buttons
- Added an option that attaches the RX window to the WINDOWS desktop.
- Added double-click short-cut operations for the stocked pictures,
   stocked templates, folder thumbnails.
- Added 320x240 image manipulating schemes
- Added a repeater function
- Fixed a bug that caused the resource shortage in Windows 95/98/ME
- Fixed some bugs and applied minor improvements

============
Window layouts
============
You can select one of three window layouts by clicking "View" and selecting "Design."

[Standard]
This is the conventional MMSSTV window layout. All the information
is shown in one window.

[Separate stock view]
The stock window is detached from the main window.

[Separate all views]
All the windows are separated.

Each detached window can be moved and resized independently.

====================
Control buttons window
====================
Click on "View" and select "Always show control buttons" to open an
optional window dedicated to the control buttons.

[Stop RX]
Stop the RX operation immediately and go into the stand-by state
(Auto).

[ReSync]
Make the synchronization again.

[Lock RX]
When the button is depressed, MMSSTV turns off "Auto stop" and "Auto
restart," and therefore it won't stop the RX scan even in QRM and/or
QSB. When the button is not depressed, "Auto stop" and "Auto
restart" are resumed.

[CopyHist]
If the RX image is not copied to the history, press this button to
force the copy.

[TX(F9)]
It functions just same as the TX button of the TX window. You can
use F9 key to switch TX/RX.

==============================================
Attaching the RX window to the WINDOWS desktop
==============================================
When you have activated "Always show RX viewer" option, you can
attach the window to the WINDOWS desktop. Right click the RX window
and select "Child of a desktop window" in the pop-up menu.
In this mode, the RX viewer remains active, even if the main MMSSTV
window is minimized.

=========================
320x240 image manipulation
=========================
Click on "Edit" and select "Handling of 320x240" to settle how to
manipulate 320x240 image sources. This selection is also applied to
the combination of the 640x480 source and 640x496 TX images.

[Vertical stretching]
The image is vertically stretched. The image aspect ratio is not
reserved.

[Auto stretching]
The image is horizontally and vertically stretched. The aspect ratio
is reserved. The original image slightly loses the left and right
edges. This is the operation that MMSSTV used in the earlier
versions.

[No stretching]
The image size is unchanged. The TX image has 16 vacant lines at
the bottom.

[Shift picture for the header]
The image size is unchanged. The TX image has 16 vacant lines at
the top for the header.

It should be noted that this manipulation does not work for the
image that derived through the image clipper.

================
SSTV repeater function
================
MMSSTV can work as an SSTV repeater. Refer to Repeater.txt for
details.

**********************************************************************
Revision history Ver1.03 -> Ver1.04
**********************************************************************
- Improved the user interface for the character input in the template
- Added perspective and 3-D effects for the template text
- Corrected some bugs and applied minor improvements

**********************************************************************
Revision history Ver1.02 -> Ver1.03
**********************************************************************
- Added "FFT demodulator" mode in the spectrum display
- Added AFC
- Added Undo in the pop-up menu for the template
- Corrected some bugs and applied minor improvements

================
Spectrum display
================
The user can select one of "OFF," "FFT," or "FM demodulator" mode for the spectrum display. The default has been set to FM demodulator. If you want to use the conventional FFT mode, change back it to "FFT."

* If you draw CMT-HELL, which was made by PY4ZBZ, in the waterfall of MMSSTV, you must select "FFT."

The FM demodulator uses another wide-band FM demodulator in addition to the picture demodulator. It draws the chart as the function of the rate of incidence at each frequency. Because its computation process is much simpler than the FFT, it gives good response even to the short pulse like a synchronization signal, but it does not reflect the signal level.

The FFT and FM demodulator observe the signal before the SSTV BPF in order to see the signals outside of the BPF, too.

--- Sound in --+--> SSTV demodulator
|
---> Spectral (FFT / FM demodulator)

==============
AFC
==============
AFC is activated by pushing the AFC button in the DSP pane on the main window. The default is ON.

When AFC is locked to the signal, the triangle marker on the synchronization frequency line is displayed in blue. When AFC is unlocked, the triangle marker is displayed in red. During in red, the response to the frequency discrimination becomes slow.

* The AGC in the previous versions was deleted because it seemed to offer no improvements.


73, Mako

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