Tips 'n' Tricks using MRP37

SWAP between Morse decoder and WIN95 programs (pseudo multitasking)

Operators who frequently use for example their WIN Log-Book-Program can swap between MRP37 and Log program by pressing Alt+Tab Key. Example:

Start MRP37
press Alt+Tab Key
work your Log program
press again Alt+Tab Key to use MRP37
please note MRP37 will need a few seconds to synchronosize again.

Electric Circuits

Volume adjustment:

MRP37 provides Volume adjustment by Mouse click. See lower left corner of MRP37 screen. Click on + or - sign.
Some soundcards are not 100% compatible do not react propperly on this adjustment.
Here are some ways to overcome this problem:

WIN95 : Use C:\windows\Sndvol32.exe it is a genaral purpose easy to use Control Panel. Adjust volumes and then start MRP37

MS-DOS:

Use original driver programs of your soundcard to adjust volume or any setting of your soundcard.
Alternative you can use the C:\MRP373\Setmix.bat
Or use C:\MRP373\setmix2.bat for "smaller soundcards"

Execute mentioned programms bevore you start the morse decoder.

Automatic Volume Adjustment for "non"-compatible soundcards:

WIN95 : Generally use the shortcut MRP37.pif to start the morse decoder. Please note you have two Mdec37.pif one in c:\MRP373 and one in c:\windows\startmenue\ be sure to modify both to prevent confusion. Add a volume adjustment program in property box to be executed before morse decoder is started. Add for example C:\Sb16\Sb16set/p or Setmix.bat

Example: Usage of C:\Sb16\Sb16set/p

MS-DOS: You can modify the Mdec.Bat (Rec.bat Play.bat) to include a program that initializes the volumes and settings of Soundcard each time. Normally Mdec.bat looks like this:

cls
mrp37 -f11025 -mOnline -iLINE -COMx Tx37.wav

You can add any program for example an original soundbalster init program "C:/Sb16/Sb16set /P" to be executed before the mrp37 is started. Then the Mdec.bat looks like this:

C:\Sb16\Sb16set /P
cls
mrp37 -f11025 -mOnline -iLINE -COMx Tx37.wav

If you are sure that for example the Setmix.bat works proper you can include the content of Setmix.bat in the Mdec.bat Then the Mdec.bat looks like this:

Mix32 -MASTER:192 -LINE:255 -MIC:255 -MIDI:0 -VOICE:184 /r /q
Mix32 -ADC_L:LINE_L:1,LINE_R:1 -ADC_R:LINE_L:1,LINE_R:1 /q
Mix32 -OUT:LINE:1,CD:0,MIC:1 -ADCGAIN:3 -OUTGAIN:2 -AGC:ON
cls
mrp37 -f11025 -mOnline -iLINE -COMx Tx37.wav

Sending under MS-DOS and Win95

MS-DOS: You have to choose the COM number you want to use. You have to modify the MDEC.Bat (REC.bat, Play.bat) . Replace the option -COMx by -COM# the # is the number you have choosen. Boot your computer in pure MS-DOS mode then morse sending should work immediately.

WIN95 Under WIN95 it is a bit tricky to get the DOS-Application MRP37 sending. Modify the Mdec.bat see instructions above for MS-DOS. For morse sending under WIN 95 you have to DISABLE in the Properties of COM in WIN Device-Manager the choosen COM number! Example for usage COM1: Please find and click on:

System -System properties
Device manager
Ports (Com and LPT)
Com-Port (Com1)
Properties -Configuration
then switch "OFF" (empty)(disable) the small controlbox
leave all menues with ok (close)
restart (boot) your computer

The effect is: The COM# is no longer is occupied by WIN95 and it is free for MS-DOS Applications like MRP37. See attached pictures below. ( sorry for the german style) To be absolute sure the "disabling" takes effect it is the best to reboot the computer. Then morse sending should work proper! If still no success please let us know about.

Example: Usage of COM1 for CW sending

Still Problems? Check C-MOS setup!

One has to use the following sequence to make MRP37 send:

Start computer in Windows 95

Go to System Turn off/disable Com1 per mentioned instructions

Reboot and go to CMOS setup.

Enable Com1 as AUTO Continue with reboot to Windows 95.

Then More send works and one can use Alt Tab to switch to for example logging program.

Full uninstall instructions:

Delete Subdirectories:

c:\MRP373
c:\MRP373-1 (only if exist)

Delete file:

c:\windows\startm~1\MRP37.pif (dos-name)

Thats all.

Speed conversion WPM to CPM:

If you have the Charater Per Minute CPM and you want to know the "Words per minute" (Wpm) you can calculate Wpm=Cpm/5
Example: 120 Cpm = 24 Wpm

Timing , gaps between Characters and Words :

The program displays CEgap=xxx and WEgap=xxx . Character Gap and Word Gap are calculated Values. The calculation is based on the measured length of Short and Space. Normally Character Gap and Word Gap are not of further use for most operators. CEgap and WEgap are relicts from the former time the program was developed. CEgap is calculated as 1.73*(Short+Space)/2 In praxis you can say CEgap=1.73*dit time WEgap is calculated as 3*CEgap In praxis you can say WEgap=5.19*dit time. In fact that are the "minumum expected" values. If CEgap and WEgap are shorter than min. the program would not recognize them as a significant gap. Never less if coded with any keyer one has to perform a CEgap as 3*dit time and a WEgap as 7*dit time. Generally the program has tolerance ranges: A CEgap is 1.73dit to 5.19dit (standard is 3 dit) A WEgap is all above 5.19 dit (standard is 7 dit)

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