SignalWorks

The "7500 Editor" button was hard coded to an incorrect directory.  It will be fixed in the next software release.

-WORKAROUND-

Go to the registry key [HKEY_LOCAL_MACHINE\SOFTWARE\Signami\SignalWorks\4.0] and create a new string called "7500EditorPath" with a value containing the file and path of the Special Formats Editor executable.

Under SW4.0.0 distributions, this is usually "C:\Program Files\Signami\SignalWorks\SFEditor.exe".

Within SignalWorks, file extensions are not really important.  The important portions of the input file are the correct storage format of the raw data and the correct effective sampling rate.  We specify “raw data” because in many cases, headers and additional data within the file will essentially provide bad data samples since SignalWorks is interpreting everything within the file as binary data samples.

Using an incorrect format selection can lead to an incorrect and unreal interpretation of the data.  This can be deceiving since SignalWorks has no way of knowing the data format and will attempt to display the information within the file, leading to a signal that may look distorted.

Using the correct effective sampling rate is critical for analyzing the data, as the results of any external signal parameter analysis will be dependent on this rate.  It is important to specify “effective” sampling rate as modern digitizers are capable of decimating (also known as downsampling or downconverting) the original hardware specific sample rate, resulting in data that is actually stored at a different rate.

When analyzing signals that are bursts of data, it should be important to note the fact that SignalWorks allows you to specify the “Start” and “Stop” points within a signal capture.  If a capture contains quite a bit of time in which there is no activity, the capture can be “trimmed” or “tightened” to only play within requested start and stop points (with no actual change to the capture file).

The SignalWorks installation (either from CD or web download) will search your computer for a valid license key. As long as the license on your computer is current and valid, you will not need the license key to install the upgrade.

To produce an audio file, create a file and save it as a Windows wave file.

1. Set the sample rate to a value compatible with sound cards and the sound card drivers. This means you should set the sample rate to 11.025 KHz, 22.050 KHz, or 44.100 KHz.
2. Make sure that the signal bandwidth is in the audio region. For 11.025 KHz sample rate, the signal must be entirely within 0 to 5.5125 KHz. As a general rule for this sample rate, the signal center frequency should be between about 1.5 KHz and 3 KHz, and the signal bandwidth should be less than 2 KHz. For PSK signals, the bandwidth is a function of the baud rate. For FSK signals, the bandwidth is a function of the baud rate and the frequency deviation.
3. Make sure the signal level is appropriate for sound playback. Sound cards operate on 16-bit samples, so the clipping level is +/- 32768. Usually, setting your signal level to between 10000 and 20000 will produce good results.
4. Save the signal as a WAV type, with a filename extension of ".wav". At 11.025 KHz sample rate, you will need 11025 samples for each second of sound you want. So, if you want 1 minute of sound, save 11025 x 60 = 661,500 samples.

Yes. Although designed primarily for the analysis of communications signals, SignalWorks can be used to analyze radar signals as well.

Installing SIGNALWORKS with a License Key Dongle requires two bits of information. First is the dongle hardware key ID; the second is the SIGNALWORKS license key. Both can be obtained from Signami if lost or misplaced.

Installation Instructions for Single User License:

1. Before starting the SignalWorks installation, it is highly recommended that you close all other applications. You may need to reboot at the end of the installation. You must have Administrator privilege to install SignalWorks.
2. If installing from CD, insert the SignalWorks CD-ROM into your CD-ROM drive. Normally, the SignalWorks installation program will execute automatically within about 30 seconds. If it does not start automatically, or if you are installing the software from other than the CD-ROM, locate and start the program “InstallSelector ” in the CD or installation base directory.
3. Type the License Key above into the space provided. The License Key must be entered exactly as shown. Then click on the “Enter and Validate License Key” button.
4. If you have typed the License Key correctly, then a readable license will be shown. Click on the “Install Standalone” button.
5. Follow the instructions for the remainder of the SignalWorks installation. When complete, click the “Finish” button.
   Important: This license requires a Hardware Key (dongle) to operate. The following instructions tell you how to install the Hardware Key and its related driver.
6. Attach the Hardware Key to the USB port of your computer.
7. Run the program “\flexid8\flexid.exe” from the installation media. Click “Next” at the first prompt.
8. Reboot your system. Answer “Yes” and click “Finish” as the driver installation program completes.
9. If you selected the installation defaults, you will find the SignalWorks applications under “Program\SignalWorks” under the Start menu.

SignalWorks software interfaces to an input device by using a Dynamic Link Library (DLL) built for that device. SignalWorks examines its "Plug Ins" folder for these DLL's, and if a DLL is not in this directory, SignalWorks will not display it as an input option. SignalWorks is distributed with most input DLL's in an "Unused" directory. You should move the DLL for any input digitizer(s) that you have from the "Unused" directory to the "Plug Ins" directory in order for them to be recognized and used by SignalWorks. You can do this as follows:

1. In Windows right click on 'Start'
2. Select 'Explore'
3. Go to the "Plug Ins/Unused" directory within the SignalWorks installation directory, usually: "Local Disk (C:)/Program Files/Signami/SignalWorks/Plug Ins/Unused".
4. Select the appropriate DLL for your digitizer (for example, "SigDig.dll", "SigDigII.dll" or "SigDigIII.dll") and drag into the parent 'Plug Ins' folder.
5. Restart SignalWorks Preview or Demod
6. Right click on the INPUT block
7. Verify that your selected SigDig .dll is now listed