G8JCFSDR Manual Install

If you are having problems with installing or running G8JCFSDR you can try manually installing the software by following the steps below - also with any comments - also take a look at the Problems ? section on the Shaft Encoder page.

1) Create a directory, eg C:\G8JCF

2) Download [use Save Target As option; right click] G8JCFSDR.EXE into the directory just created, this is the main programme

3) Download [use Save Target As option; right click] HamBandPlan.bpl, BroadcastBands.bpl, BBCBandPlan.bpl, VolMetBandPlan.bpl into that directory - Band Plans for presets - you must have at least one bandplan installed

4) Download G8JCF.DLL into C:\WINDOWS\SYSTEM32 - DSP & Vector Library

5)    Download G8JCFDIAL.OCX into C:\WINDOWS\SYSTEM32 - Dial Control
        Register the dial control by starting up a command box from Start | Run and executing
        regsvr32 c:\windows\system32\g8jcfdial.ocx

6) Download INPOUT.DLL into C:\WINDOWS\SYSTEM32 - Parallel Port bit twiddling I/F

7) Check that you have DirectX 8.1 or greater installed; Run c:\windows\system32\dxdiag.exe

8) Check that you have the MS VB6 Runtime installed; Search/Find Files c:\windows\system32\msvbvm60.dll

9) Check that you have MS C Runtime installed; Search/Find Files c:\windows\system32\msvcrt.dll

10) Check that you have MS Comm control installed; Search/Find Files c:\windows\system32\mscomm32.ocx

11) Run G8JCFSDR.EXE to execute the SDR s/w

12) If you want to use the Intel SPL to reduce CPU consumption then Google for "Intel Signal Processing Library", eg http://www.bk.isy.liu.se/candide/wincandide/intel.zip and install the library into c:\windows\system32.

I have tested the SDR S/W on Windows 98, Windows ME, and Windows XP/Pro. Because Windows NT does NOT support DirectX later than version 3, I'm afraid that NT owners are out of luck.

The soundcard is very important from a quality point of view. The Sound Card must support Full-Duplex 48KHz sampling rate [anything bought in the last 5yrs should be fine]. Before you try and use the SDR S/W make sure that you get your PC + Soundcard level settings for the Line or Mic inputs right to work with the DRT1 H/W. The DRT1 can output over 1 V so driving the Line input is best, but if you are using a portable, then you'll probably have only a Mic input. On very strong AM stations, the output level of the H/W can overdrive the input of your soundcard especially if you use the Mic input - Two options, unplug from the Mic and plug into the Line (not good for weak signal reception and inconvenient), or put a 4K7 ohm potentiometer between the board and the soundcard Mic input which you can adjust. Look at the EXT display at the left-hand-side of the bottom pane to see the level of the Input signal coming out of the ADC - values between 500 to 8191 are good.