	*************************************************
        *            Timebase Main/Delayed		*
	*************************************************

1. FFT
-------------------------

FFT is now reachable from the Timebase menu and no longer from the Math menu. The FFT-submenu
will appear when pushing the FFT-button once more.


2. USTB-Submenu
-------------------------

Here You can make some settings for the ultra slow timebases.



	*************************************************
        *            USTB Menu				*
	*************************************************

1. USTB-Mode
-------------------------

- Roll Forward -> Actual timepointer rolls through the memory and jumps back to the start when reaching the end.
                  After jumping back the old values in the memory will be overwritten.
- Roll Reverse -> Rolls from end to the memory start and jumps back to the end when reaching the start.
                  After jumping back the old values in the memory will be overwritten.
- Shift Forward -> Shifts the whole signal through the memory to the end and out of the memory. Signal end which
                   is shifted out of memory is lost. Actual time pointer (signal start) is always on the left side.
- Shift Reverse -> Shifts from the right side to the left. Actual time pointer (signal start) is always on the right side.


2. USTB Display
-------------------------

This function is available only for roll mode.
- Permanent -> The displayed memory windows follows the time pointer permanently point for point.
- Stepwise  -> The displayed memory window always jumps to the next position when the time pointer reaches the window edge.
               The step width is one grid width (12 divs) at one step. 


2. Buffer Size
-------------------------

Sets the buffer size which is used for signal shifting/rolling.Available are 8kbyte/16kbyte/32kbyte for roll mode
and 8kbyte/16kbyte for shift mode. All buffer sizes are supported by memory scrolling.

Not full supported at this time is for 32kbyte buffer size the recall/overlay function and the csv-dump function
in the quick print menu. There will be transmitted only 16kbyte maximum of the buffer, the rest will be cut off.




	*************************************************
        *            Channel	1 - 4			*
	*************************************************

1. Center Channel
-------------------------

Sets the virtual zero voltage (Y-position) to the screen middle.



2. Dispatch Channel
-------------------------

Depending on the number of active channels the zero levels are dispatched
on the screen with the focus to have maximum place for every channel.

Since FW-version 2.19 beta the dispatch function got a DC offset detection which
adjusts the zerolevel depending on the offset. (for digital signals etc.)



	*************************************************
        *            Acquire				*
	*************************************************

1. Logic Processor
----------------------

Shows the signal under a logical point of view. That means the level is normed to one div and
shows the state (high or low) only. Depending on the selected logic family the thresholds for
switching between the levels is set. Also the triggerlevel is is preset to the middle between
the switching points to guarantee a stable signal. In case of RS232 which is a negative logic,
the signal is converted to the logical output (negative signal means logical high or 1).



2. Noise Filter
----------------------

engl. - Filter characterisics (cut off frequency) at 1GSa/s:
germ. - Die Filter haben folgende Eckfrequenzen bei 1GSa/s:

Proprietary algorithm

- Smooth ca. 80 - 90Mhz at TB = 50ns/div -> in all other TB cutoff frequ. is half sample rate that means lossless!

- Strong ca. 30 Mhz -> because of overlapping here is a loss of bandwidth


IIR algorithm

- IIR 1 Stage ca. 70 - 80Mhz IIR-filter with 1 stage and coefficient 0.5

- IIR 2 Stage ca. 35 - 40Mhz IIR-filter with 2 Stages and coefficients 0.5

- IIR 3 Stage ca. 20MHhz  IIR-filter with 3 Stages and coefficients 0.5/0.5/0.25 - very aggressive! 


The IIR-filters are producing a little dc-offset depending on the noise level of the signal.

The filter functions are using own memory areas for their results - what does that mean?

In Stop mode You can scroll through the memory with filter switched on.
Scrolling happens in the filter buffer.

Filter can be switched in Stop mode and shows effect immediately.



	*************************************************
        *            	Display				*
	*************************************************

1. No Display Popup Menu
------------------------------

Channels can be forced to operate in the background without displaying the trace.
This maybe helpfull when using the channel as triggersource for a signal on
another channel (like ext. triggering).


2. Draw Mode Menu
-----------------------------

In time domain two drawing modes are available:

- fast drawing with vertical pixel connection. Increases the refresh rate.

- accurate drawing with line function. Signals will be displayed more accurately
  but the refresh rate will decrease a little bit.

- pixel only, shows the real sample points only



3. FFT Display Menu
----------------------------------

FFT mode has its own display menu now which will be switched automatically depending
on actual operating mode



	*************************************************
        *            	Display Setup			*
	*************************************************

1. Grid Color Popup Menu
------------------------------

- change the grid color to the available palettes


2. Grid Lines Popup Menu
-----------------------------

- solid grid lines
- dotted grid lines


3. Status Layout Popup Menu
-----------------------------

Choose an alternative Screen Layout

- standard (beige background)
- multiple monochrome layouts


4. QM-Cursors
------------------------------

- switch cursor display in QM mode on or off



	*************************************************
        *            	Save / Recall			*
	*************************************************

1. Overlay Trace
-------------------------------

A signal with its settings (trace) can be loaded from a coosen memory place
(as Recall Trace). This loaded signal will be overlayed over the actual 
Signal which is adapted to the trace settings. So it is possible make a
direct comparison between trace and actual signal.


2. Restore Settings
------------------------------

After choosing "Recall Trace" or "Overlay Trace" the settings from before are 
gone. Pushing "Restore Settings" will load the settings from before from flash.



	*************************************************
        *            	Quick Print			*
	*************************************************

1. Choose the destinaton for the transmission
------------------------------------------------
 
<PC>		data will be sent via RS232 to the connected PC on which
		the screenshot software is running 

<USB-Host>	data will be sent via RS232 to the connected USB-Host and
		there on an USB-stick or a SD-card.
		Infos about this project You will find here:	
		http://sourceforge.net/apps/trac/welecw2000a/wiki/Vinculum 
	


2. Additional function of the Quick Print button 
-------------------------------------------------

Double pushing the Quick Print button will trigger a screenshot without
changing the menu. So You are able to make a screenshot from Your actual
situation.


3. Send Measure 
-------------------------------------------------

Sends the measure slot values in quick measure mode or cursor mode.




	*************************************************
        *            	Autoscale			*
	*************************************************

1. Double push option
------------------------------------------------

Pushing autoscale twice starts the slow TB search


2. TB Search Setup
------------------------------------------------

- Trigger Source	(TB search only on the channel which is the set as trigger source in the Edge menu.
			 The voltage range is determined all active channels)

- All Channels		(TB search on all active channels in the order 1, 2, 3, 4. The first channel with 
			 a triggerable signal is choosen as new trigger source. The voltage range is determined
			 on all active channels which are same or higher than the trigger source)


	*************************************************
        *            Trigger Setting (Edge)		*
	*************************************************

1. Auto Pretrigger
----------------------

engl. - What does it do and how does I find it?
germ. - Was macht das Ding und wie finde ich es?

engl. - the memory window (displayed in the memory browser) is set to the
	start address of the value buffer.
germ. - Der für die Anzeige verwendete Speicherausschnitt wird ganz an den
	Anfang des Wertespeichers gesetzt


engl. - the pretrigger is set to the screen middle.
germ. - Der Pretrigger wird auf die Bildschirmmitte gesetzt

engl. - change to edge menu and push the pretrigger softbutton on which the
	pretrigger time is displayed.
germ. - Ins Edge Menu wechseln und auf den Pretrigger Softbutton drücken der
	sonst nur die Pretriggerzeit anzeigt.

2. Adjust Window
----------------------------------

Shifts the displayed memory window to the pretrigger position due to the pretrigger setting if possible.
If the pretrigger is is too near to the edges, the window will be positioned at maximum
left or right. 





	*************************************************
        *            Trigger Mode/Coupling		*
	*************************************************

1. Mode Coupling
------------------------

Pushing the Mode/Coupling button the first time will change to the Mode/Coupling menu.
Every additional pushing will change the trigger mode which normally is changed by
the mode pulldown menu (softbutton 1).


2. Manual Trigger
------------------------

Is available in edge trigger mode "Normal" and at "Single" mode. Pushing the
manual trigger will force one trigger event.


3. Trigger Auto Level
-------------------------

Trigger Level is set to the signal middle of the active source channel.


4. Holdoff
------------------------

engl. - Range is limited to 134ms now. 

	New count logic. Smallest step width is 8ns. Smaller steps are limited
	by the hardware. The 1ms range has the step width 1 µs. Display has 3
	digits after the dot now.

	Pushing the Holdoff button multiple, switches the value in factor 10 steps.

germ. - Der Wertebereich ist auf 134ms beschränkt.

	Die ganze Zähllogik ist komplett überarbeitet. Die kleinste
	Schrittweite ist jetzt 8ns. Kleinere Schritte kann die Hardware nicht
	abbilden. Ab 1ms ist die Schrittweite 1µs. Es gibt jetzt 3
	Nachkommastellen.

	Durch mehrfaches Drücken der Holdofftaste kann in Faktor 10 Schritten
	weitergeschaltet werden.


5. More 
------------------------
	
---> Trigger Submenu


	*************************************************
        *    Extended  Trigger Mode/Coupling		*
	*************************************************

1. LED 1 Setup
------------------------------------

Choose LED 1 function (left LED).

- LED 1 off
- Trigger armed 



2. LED 2 Setup
------------------------------------

Choose LED 2 function (right LED).

- LED off
- Triggered 	(only active when trigger occured and data acquisition started)
- Trigger Event (also active when trigger occured and no data acquisition started like in Stop mode) 



3. Map LED 1 + 2 to channel 3 + 4 LED
---------------------------------------

Use Cahnnel 3 + 4 LEDs instead of LED 1 + 2.



4. Single Trigger Setup
------------------------------------

Choose behaviour of Single Button

- off 		(no manual trigger function - standard behaviour)
- double push	(second push in single mode always initiates a manual trigger)
- direct	(forces a manual trigger immidiatly without changing to single mode) 



5. Pre Trigger Setup
------------------------------------

Choose behaviour of Pre Trigger at TB change and Auto Pre Trigger.

- Left Edge	(Auto Pre Trigger set to the left grid edge, grid position keeps constant at TB change)
- First Div	(Auto Pre Trigger set to the first grid division on the left, grid position keeps constant at TB change)
- Grid Middle	(Auto Pre Trigger set to the grid middle, grid position keeps constant at TB change)
- Trace middle	(Auto Pre Trigger set to the trace middle, grid middle (memory window) follows,
		 grid position keeps constant at TB change)
- Keep		(Auto Pre Trigger has no effect, pre trigger value keeps constant at TB change)
- Keep + Follow	(Auto Pre Trigger centers the grid (memory window) over the pre trigger position,
		 pre trigger value keeps constant at TB change, memory window follows)



	*************************************************
        *            Hardwaresettings			*
	*************************************************

1. The ADC Setup
------------------------------------

The factory setting results in a resonance problem at higher frequencies on some devices.
The HF-setting deactivates some filters in the readout logic of the FPGA.
This should make you able to measure frequencies up to 150 MHz and more.

I always use the HF-Setting because it has the best results on my two
DSOs.

A few Users had some problems with spikes, so there are some other test
settings to find out which one matches best to Your device.





2. Pre Gain Setting
-------------------------------------------

The Pre Gain menu allows you to override the Factory setting of gain 1
at the 1er and 2er ranges with the gain 1.25 - this may have a positive
effect to the noise level.

The other settings are for hardware modifications in the preamp stage on
the mainbord. Some users exchanged the line resistors (0 Ohm) at the
preamp input against 33 Ohm. Due to that You can choose other scaling
factors in this menu which fit to those modifications.

As to read in the hardware thread 

http://www.mikrocontroller.net/topic/1661333#postform

there is planned a little preamp board as a new input stage. For this
modification I added the Add On entry.



	*************************************************
        *            	Utility				*
	*************************************************

1. Calibrate Offsets
------------------------------------

New calibration which calibrates ADC-offsets and DAC-offsets in one process.



2. Calibration Sets
------------------------------------

This function supports 4 different calibrations for external input divices with differing DC-offset
like active probes or similar.

For normal purposes "Standard" can be used.



	*************************************************
        *            	Math				*
	*************************************************


1. Offsets
------------------------------------

Gives the possibility to change the virtual zero of the math channel. Turning faster lets the
offset snap in on the grid lines. Pushing the offset button once more resets the offset to zero.

Offset can be adjusted for every math operation separately.






Regards Hayo