diff --git a/applications/lofar2/doc/prestudy/desp_howtools_erko.txt b/applications/lofar2/doc/prestudy/desp_howtools_erko.txt
index 458e54aca357f71bf09309c3c58d2416fdcd3184..aa73321a0a64b83db5e414ee41c5a4f02ef5de62 100755
--- a/applications/lofar2/doc/prestudy/desp_howtools_erko.txt
+++ b/applications/lofar2/doc/prestudy/desp_howtools_erko.txt
@@ -1,7 +1,90 @@
+* RadioHDL with GIT (LOFAR2.0)
+* RadioHDL with SVN (APERTIF/ARTS)
 * GIT workflow
 * Confluence
 * Polarion
 * Latex
+* Markdown
+
+*******************************************************************************
+* RadioHDL with GIT
+*******************************************************************************
+
+# Setup vendor specific environment variables in .bashrc
+
+  * bashrc defines root directories that contain one or more versions of tool installations
+    - define MENTOR_DIR : modelsim installations
+    - define ALTERA_DIR : altera installations
+    - define MODELSIM_ALTERA_LIBS_DIR  : compiled modelsim simulation libraries for altera components
+
+    - LM_LICENSE_FILE=<our_license@our_compagny>
+
+# Setup RadioHDL development environment for hdl/. The hdl/libraries, hdl/boards and hdl/applications are
+# developed simultaneously and therefor in one git hdl/ repository
+
+> cd ~/git/hdl
+
+> . ./init_hdl.sh    
+
+  * init_hdl.sh defines:
+    - RADIOHDL_WORK directory for where the source code resides
+    - RADIOHDL_BUILD_DIR directory for where the targets will be build
+    - HDL_IOFILE_SIM_DIR=${RADIOHDL_BUILD_DIR}/sim for simulating with Modelsim using file IO
+  
+  * init_hdl.sh copies git user_components.ipx into Altera dir's
+    - cp ${RADIOHDL_WORK}/hdl_user_components.ipx $altera_dir/ip/altera/user_components.ipx
+  
+  * init_hdl.sh automatically also sources ../radiohdl/init_radiohdl.sh if necessary
+
+
+source also radiohdl tools
+. ../radiohdl/init_radiohdl.sh
+
+  * init_radiohdl.sh defines:
+    - RADIOHDL_GEAR directory of where the init_radiohdl.sh is located
+    - RADIOHDL_BUILD_DIR = ${RADIOHDL_BUILD_DIR}/build if not already defined
+    - RADIOHDL_CONFIG = ${RADIOHDL_GEAR}/config if not already defined
+                                
+  * init_radiohdl.sh extends:
+    - PATH with ${RADIOHDL_GEAR}/core
+                ${RADIOHDL_GEAR}/quartus
+                ${RADIOHDL_GEAR}/modelsim
+    - PYTHONPATH with ${RADIOHDL_GEAR}/core
+                      ${RADIOHDL_GEAR}/components
+    
+                                    
+> compile_altera_simlibs unb1   # creates build/unb1/hdl_libraries_ip_stratixiv.txt
+                                # creates build/quartus/<tool version> simulation models that need to be moved
+                                # manually to $MODELSIM_ALTERA_LIBS_DIR/<tool version>
+                                
+> generate_ip_libs unb1         # creates build/unb1/qmegawiz/
+                                # creates build/unb1/quartus_sh --> empty dir, why is it there?
+                                
+> quartus_config unb1           # creates build/unb1/quartus/<hdllib libraries> for synthesis
+                                # creates build/unb1/quartus/technology_select_pkg.vhd
+                                
+> modelsim_config unb1          # creates build/unb1/modelsim/<hdllib libraries> for simulation
+                                # creates build/unb1/modelsim/modelsim_project_files.txt for Modelsim commands.do
+                                # creates build/unb1/modelsim/technology_select_pkg.vhd
+                                
+> run_qsys unb1 unb1_minimal_qsys   # creates QSYS block in build/unb1/quartus/unb1_minimal_qsys
+> run_qcomp unb1 unb1_minimal_qsys  # creates 
+
+> run_modelsim unb1 &
+
+
+*******************************************************************************
+* RadioHDL with SVN
+*******************************************************************************
+
+echo "Uniboard trunk is selected"
+export SVN=${HOME}/svnroot/UniBoard_FP7
+#Setup RadioHDL environment for UniBoard2 and and new Uniboard1 applications
+. ${SVN}/RadioHDL/trunk/tools/setup_radiohdl.sh
+# Support old UniBoard environment (including Aarfaac and Paasar)
+. ${SVN}/RadioHDL/trunk/tools/setup_unb.sh
+
+
 
 *******************************************************************************
 * GIT workflow
@@ -28,6 +111,7 @@ cd ~/git
 git init  # start new repo at this dir, creates .git/
 git clone # get and start with existing repo
 git clone git@git.astron.nl:desp/args.git
+git clone git@git.astron.nl:desp/sampy.git
 
 git status # what is in stage area and what is modified
 
@@ -41,24 +125,24 @@ v git commit
 * history # .git repository with entire commit graph
 
 # To use a repo
-git add <dir>/<file>    # add to stage area, set for commit. Cannot add empty dir, need empty file in it
-git add .               # add all new and modified to stageing area
-git diff                # diff between file in working tree and staging area
-git diff --staged # diff between file in staging area and history
-git rm <filename> # remove file from working tree and stage the delete
+git add <dir>/<file>       # add to stage area, set for commit. Cannot add empty dir, need empty file in it
+git add .                  # add all new and modified to stageing area
+git diff                   # diff between file in working tree and staging area
+git diff --staged          # diff between file in staging area and history
+git rm <filename>          # remove file from working tree and stage the delete
 git checkout -- <filename> # revert a working tree change
-git reset               # clear stage area
-git reset HEAD <filename> # revert staged change
-git log -- <filename> # show history of file
+git reset                  # clear stage area
+git reset HEAD <filename>  # revert staged change
+git log -- <filename>      # show history of file
 git checkout <version hash> -- s2 # retrieve file from history into staged area and working tree
 
 
 Part 2:
 
-git commit -m "" # commit what is in stage area
-git commit -a -m "" # add to stage area and commit what is in stage area
+git commit -m ""           # commit what is in stage area
+git commit -a -m ""        # add to stage area and commit what is in stage area
 alias graph="git log --all --decorate --oneline --graph"
-git branch <branch name> # creat branch
+git branch <branch name>   # creat branch
 git branch # show branches
 git checkout <branch name> # change working tree and stage area to branch
 git checkout master
@@ -114,12 +198,44 @@ git status
 # delete branch and fetch npstream if the pull request was accepted
 git remote remove <remote name> # remove a remote repo
 
+Review process
+
+* Jira ticket defines the work to be done
+* coder works on branch with Jira ticket number
+* manually run regression test to test the changes (for Casacore SW the merge
+  request makes github automatically issue a regression test in the cloud)
+* coder does merge request to reviewer
+* gitlab will warn if the branch will lead to a merge conflict, the coder then
+  first has to fix the merge conflict by merging the master to the branch.
+  The merge can use merging or rebasing, Ger typically uses merging.
+* reviewer reviews the code per line and in general comments in gitlab GUI,
+  so no need to pull the branch locally
+* Use 'Open in Web IDE' button to see max about 10 changes, Use 'Changes' menu
+  to see all changes. Green is new file, orange is change file, + is new lines
+  - is removed lines.
+* coder does updates on branch until both coder and reviewer are ok, they are
+  notified by gitlab
+* when review is done then the reviewer does the merge.
+* the merge automatically deletes the branch (if selected to do so in gitlab)
+  locally the coder manually needs to delete the branch
+* Use Jira tag in commit message to have link between GIT and Jira. The link
+  was made via Settings/Intergations/Jira
+
+Note:
+* In github a merge request is called a pull request
+* Default a pull pulls the master. Typically it is not necessary to pull a 
+  branch because the reviewer does not need to compile and run the code and
+  because typically only one coder works on a branch.
+
+
 
 
 *******************************************************************************
 * Confluence:
 *******************************************************************************
 - space tools menu links onder om secties the ordenen.
+- space tools menu, content tools, custom export to PDF --> to export multiple
+  pages to PDF and to preserve th ASTRON logo in the export
 
 
 *******************************************************************************
@@ -140,4 +256,59 @@ git remote remove <remote name> # remove a remote repo
 
 
 
-                       .
\ No newline at end of file
+*******************************************************************************
+* Markdown
+*******************************************************************************
+
+Text will wrap.
+
+Backslash is escape chararcter.
+
+# Heading 1
+## Heading 2
+### Heading 3
+#### Heading 4
+##### Heading 5
+###### Heading 6
+
+Horizontal rules three or more of ***, ___, ---
+
+*italic*
+_italic_
+**bold**
+__bold__
+**bold and _bolditalic_**    combined
+`boxed`
+~~strike through~~
+
+Block quotes (alinea with an indent bar):
+> Block text will wrap
+
+Unordered list using *, -, +, indent >= 1 space
+* Main item 1
+* Main item 2          
+ * sub item 2a  use 2 trailing spaces for return inside paragraph
+ * sub item 2b
+ 
+Ordered list 
+1. Main item 1
+2. Main item 2          
+ 2.1 sub item 2a
+ 2.2 sub item 2b
+           
+Images  
+![Logo](path to image file)
+![Logo](web link to image file)
+![Logo][image1]
+
+[image1]:web link to image file
+
+Links:
+[ASTRON]:https://www.astron.nl
+
+Table:
+|col1 | col2| Col3 |    column titles
+|---|:---:|--:|    >= 3 dashes, colon for left, center, right align
+| row text | row text | row text|
+| row text | row text | row text|
+
diff --git a/applications/lofar2/doc/prestudy/desp_radiohdl_article.txt b/applications/lofar2/doc/prestudy/desp_radiohdl_article.txt
index c1e615ead14324c22bcd41e7781a71960a1b5f44..58b182f243ea6b85dd967e1df00f1145376b0f47 100644
--- a/applications/lofar2/doc/prestudy/desp_radiohdl_article.txt
+++ b/applications/lofar2/doc/prestudy/desp_radiohdl_article.txt
@@ -14,28 +14,9 @@ The name RadioHDL reflects that it was first used for HDL development in FPGA pr
 astronomy, but it can be used for any HDL development project.
 
 
-*******************************************************************************
-* 2) User guide topics
-*******************************************************************************
-
-a) Introduction:
-
-RadioHDL is a highly flexible automated build environment for HDL source code. The HDL is 
-organized in HDL libraries. The parameters for HDL libraries, the build
-tools and target FPGA are kept in configuration files. The configuration files and source
-code are the inputs for the RadioHDL tool. The output is a build target that depends on
-which build tool is used. The build target can e.g. be a project file for Modelsim to 
-simulate the HDL, a project file for Quartus to synthesize the HDL, a report log from a 
-regression test that simulated the HDL. Fig 1 shows the build flow from source to target.
-The config files and source files are kept in a directory tree under version control, while
-the target files are build in a separete build directory tree.
-
-  config files\
-               --> tool specific --> target files --> Vendor tool --> target files
-  source files/    config script
-
-Fig 1. RadioHDL flow from source to target (see 30_FWbuild_Eric, SKA Hongkong)
-
+Technology independence
+- Using sim models
+- c_technology = sim or using g_sim?
 
 The HDL libraries provide a hierarchy that promotes code reuse. The top level component that
 can run on an FPGA is also a HDL library. Technology dependent IP for e.g. PLL, RAM, FIFO,
@@ -58,128 +39,34 @@ of HDL libraries.
 
 Fig 2. Organize firmware in libraries (see 30_FWbuild_Eric, SKA Hongkong)
 
+
 Features:
-- RadioHDL gear scripting based on Python 3.x
-- Configuration files to define the sources and how to build them
+- RadioHDL scripting based on Python 3.x
+- Configuration files to define the sources and how to automatically build them
 - Separation of source files and build result files
 - All HDL organised in HDL libraries that
   . provide hierarchical structure and promote reuse
+  . can be used to build different revisions of the same source code based on generics
   . allow separation of technology dependent libraries, board specific libraries, general
     libraries and application specific libraries
-  . can be used to build different revisions of the same source code based on generics
   . can include local test benches to verify the library in a regression test
 
-Pro:
-- Uniform way of using tools and building code
 
-Con:
-- Maintain tool to keep up with changes in Vendor tool versions
-- Initial effort to support new tools or tools from different vendors
-- It can be difficult to support vendor specific features. If these features are rarely used
-  or requrie human intervention, then it may be not worth the effort or even impossible to
-  sautomate the use of these features by adding a key to the config file.
 
-b) Quick start:
-- Using sim models
-- c_technology = sim or using g_sim?
 
+*******************************************************************************
+* Open issues:
+*******************************************************************************
+- Support more roots in RADIOHDL_WORK for searching HDL libraries 
+- Central HDL_IO_FILE_SIM_DIR = build/sim --> Project local sim dir
+- avs_eth_coe.vhd per tool version? Because copying avs_eth_coe_<buildset>_hw.tcl to $HDL_BUILD_DIR
+  copies the last <buildset>, using more than one buildset at a time gices conflicts.
+- RadioHDL improvements requested by CSIRO for Vivado
 
-c) Config files:
-  The configuration files define key-value pairs, like a dictionary in Python. There are three
-  different kinds of configuration files:
-  
-  hdl_buildset_<buildset_name>.cfg 
-    . A central hdl_buildset_<name> build configuration file defines the combination of sources,
-      FPGA type and version and tool versions that are needed to build target FPGA type (board)
-      and type and version of the tools for synthesis, simulation.
-    . defines a combination of board, FPGA, tools (sythesis, simulation) and IP libraries
-      versions
-    . one central config file per buildset located at $RADIOHDL_CONFIG
-    . buildset name is typically an abbreviation that identifies the target board hardware and
-      a version, e.g. 'unb1' for a version 1 of a board called UniBoard. If the same board is 
-      used but with another set of tool versions, then that may be identified by e.g. 'unb1a'.
-  
-  hdl_tool_<tool_name>.cfg 
-    . A central hdl_tool_<name>.cfg tool configuration file that defines central setting for
-      that tool. Typical tools are e.g. Modelsim for simulation and Quartus for synthesis, but
-      other tool vendors can also be supported and other tools like a reggression test that
-      runs a set of test benches for a set of HDL libraries.
-    . defines tool specific settings e.g.
-    
-        tool config file           used for tool
-        hdl_tool_modelsim.cfg      Modelsim simulator
-        hdl_tool_quartus.cfg       Quartus synthesis, SOPC, QSYS, IP generation, user settings
-        
-        
-    . one central per tool located at $RADIOHDL_CONFIG
-    
-  hdllib.cfg :
-    . Each HDL Library has a local hdllib.cfg configuration file that defines the sources and
-      supported tools
-    . many, each local per HDL library in a sub directory of $RADIOHDL_WORK
-    . the HDL library cam define module library with VHDL that is reused in other lirbaries or
-      a top level library with a top level entity that maps on the IO of the FPGA.
-    . typically the HDL library points to sources that are located in the same directory or in
-      its sub directories, however absolute paths to sources are also allowed
-    . the hdllib.cfg can be divided into sections to group keys that are used for a specific
-      target. The section headers are identified between square brackets [section_name],
-      similar as in a Windows ini file. The first part of a hdllib.cfg file has no section 
-      header as these keys are available for all target scripts. The keys within a section are
-      applicable to the corresponding tool script. E.g:
-        
-        section name              used by tool script
-        [modelsim_project_file]   modelsim_config.py
-        [quartus_project_file]    quartus_config.py
-          
 
-d) Environment setup
-
-* Operating system
-  RadioHDL supports both Windows and Linux operating systems. The following tools need to be 
-  availabel in order to build target files (TBC):
-  - Make (available in /bin for win32 platforms)
-  - Python 3.x
-  - Python libraries (numpy, pylatex, yaml) 
-
-* Environment variables
-
-  .bashrc
-  - ALTERA_DIR               is set to where Altera tool version is installed (i.e. Quartus)
-  - MENTOR_DIR               is set to where Mentor tool version is installed (i.e. Modelsim)
-  - MODELSIM_ALTERA_LIBS_DIR is set to where the compiled Altera tool versions HDL libraries
-                             for simulation with Modelsim are stored
-
-  init_<my_project>.sh
-  - RADIOHDL_WORK      is set to location of this init_<my_project>.sh and defines the root
-                       directory from where all HDL libraries source files (hdllib.cfg) can be
-                       found
-    
-  - RADIOHDL_BUILD_DIR is set to ${RADIOHDL_WORK}/build and defines where all build results will
-                       be put
-  - HDL_IOFILE_SIM_DIR is set to ${RADIOHDL_BUILD_DIR}/sim and defines where Modelsim simulation
-                       will keep temporary file IO files.
-  
-  init_radiohdl.sh
-  - RADIOHDL_GEAR   is set to location of this init_radiohdl.sh and defines the root directory
-                    of where the RadioHDL tool is installed.
-  - RADIOHDL_CONFIG is set to ${RADIOHDL_GEAR}/config if not already defined by the user and
-                    defines where the central configuration scripts for buildsets (unb1, unb2b)
-                    and tools (modelsim, quartus) are kept.
-                    
-  Environment variables for build tools (e.g. modelsim, quartus) are set automatically (TBC)
-    MODEL_TECH_DIR
-    
-
-* Environment files
-
-  Altera hdl_user_components.ipx:
-  This hdl_user_components.ipx defines where Quartus QSYS searches for user components. The 
-  init_<my_project>.sh copies hdl_user_components.ipx from $RADIOHDL_WORK to
-  ${ALTERA_DIR}/ip/altera/user_components.ipx. 
-
-
-
-f) Source directory structure
+*******************************************************************************
+* Source directory structure
+*******************************************************************************
 
 RadioHDL requires that:
 
@@ -252,107 +139,15 @@ The technology/ directory contains several technology dependent libraries of ven
 pre generated and then wrapped by a technology agnostic wrapper entity. These wrapper entities
 are then used by the other libraries.
 
-g) Build directory structure
-
-The build directory structure contains created files and copied files and is located at
-
-  $RADIOHDL_BUILD_DIR/<hdltool_name>/                             for hdl_tool_<name>.cfg
-  $RADIOHDL_BUILD_DIR/<buildset_name>/<tool_name>/                for hdl_tool_<name>.cfg
-  $RADIOHDL_BUILD_DIR/<buildset_name>/<tool_name>/<hdllib_name>/  for hdllib.cfg per hdl_tool_<name>.cfg
-
-      
-      
-h) Top level HDL library:
-
-A top level HDL library is defined as a HDL library that contains a top level entity and 
-configuration parameters to synthesize it to an FPGA image that can run on an FPGA.
-A top level HDL library should not be reused in other HDL libraries, to avoid confusion
-that can occur due to conflicting or duplicate source files.
-
 
 
 *******************************************************************************
-* Run RadioHDL with GIT
-
-bashrc:
-- define ALTERA_DIR
-
-> cd ~/git/hdl
-> . ./init_hdl.sh               # setup development environment for hdl/
-                                # hdl/libraries, hdl/boards and hdl/applications are developed simultaneously and therefor in one git hdl/ repository
-                                # automatically also sources ../radiohdl/init_radiohdl.sh if necessary
-
-defines:
-- RADIOHDL_WORK directory for where the source code resides
-- RADIOHDL_BUILD_DIR directory for where the targets will be build
-- HDL_IOFILE_SIM_DIR=${RADIOHDL_BUILD_DIR}/sim for simulating with Modelsim using file IO
-
-copy: git user_componets.ipx into Altera dir's
-- cp ${RADIOHDL_WORK}/hdl_user_components.ipx $altera_dir/ip/altera/user_components.ipx
-
-source also radiohdl tools
-. ../radiohdl/init_radiohdl.sh
-                                
-                                
-> compile_altera_simlibs unb1   # creates build/unb1/hdl_libraries_ip_stratixiv.txt
-                                # creates build/quartus/<tool version> simulation models that need to be moved to /home/software/modelsim_altera_libs
-> generate_ip_libs unb1         # creates build/unb1/qmegawiz/
-                                # creates build/unb1/quartus_sh --> empty dir, why is it there?
-> quartus_config unb1           # creates build/unb1/quartus/<hdllib libraries> for synthesis
-                                # creates build/unb1/quartus/technology_select_pkg.vhd
-> modelsim_config unb1          # creates build/unb1/modelsim/<hdllib libraries> for simulation
-                                # creates build/unb1/modelsim/modelsim_project_files.txt for Modelsim commands.do
-                                # creates build/unb1/modelsim/technology_select_pkg.vhd
-> run_qsys unb1 unb1_minimal_qsys
-
-> run_modelsim unb1 &
-
-
-*******************************************************************************
-* Run RadioHDL with SVN
-
-echo "Uniboard trunk is selected"
-export SVN=${HOME}/svnroot/UniBoard_FP7
-#Setup RadioHDL environment for UniBoard2 and and new Uniboard1 applications
-. ${SVN}/RadioHDL/trunk/tools/setup_radiohdl.sh
-# Support old UniBoard environment (including Aarfaac and Paasar)
-. ${SVN}/RadioHDL/trunk/tools/setup_unb.sh
-
-
+* Simulation using file IO
 *******************************************************************************
-* 2) User guide topics
 
+HDL_IOFILE_SIM_DIR is set to ${RADIOHDL_BUILD_DIR}/sim and defines where Modelsim simulation
+                   will keep temporary file IO files.
 
 
-*******************************************************************************
-* 3) Programmers guide topics
-*******************************************************************************
-
-RadioHDL gear directory structure
-$RADIOHDL_GEAR/config   # central config files for buildsets and tools
-              /core     # RadioHDL gear scripts
-              /doc      # manuals
-              /ise      # scripts for Xilinx ISE, Impact tools
-              /modelsim # scripts for Mentor Modelsim tool
-              /quartus  # scripts for Altera Quartus, SOPC, QSYS tools
-              
-              init_radiohdl.sh   # Initialize RadioHDL for a project at $RADIOHDL_WORK
-              
-              generic.sh  # Collection of useful functions
-              
-              # Scripts to adopt RadioHDL configuration parameters as environment variables
-              # or paths
-              set_config_path         # expand config paths
-              set_config_variable     # export config variables
-              set_hdllib_variable     # export hdllib variables
 
-
-*******************************************************************************
-* Open issues:
-*******************************************************************************
-- Support more roots in RADIOHDL_WORK for searching HDL libraries 
-- Central HDL_IO_FILE_SIM_DIR = build/sim --> Project local sim dir
-- avs_eth_coe.vhd per tool version? Because copying avs_eth_coe_<buildset>_hw.tcl to $HDL_BUILD_DIR
-  copies the last <buildset>, using more than one buildset at a time gices conflicts.
-- RadioHDL improvements requested by CSIRO for Vivado
       
\ No newline at end of file