SAQ PANORAMIC VLF RECEIVER HOW TO
SAQ PANORAMIC VLF RECEIVER PC

SAQ PANORAMIC VLF RECEIVER PC

Malfunction- maybe the PC is too slow (it did work with a 266MHz-P2) or the If one of the function blocks is colored red, the program has detected a (component window after loading the application 'SAQ - Receiver #1' ) If everything is ok with the soundcard, you see something like Now switch to SpecLab's 'Circuit' window (Menu 'View/Windows.Spectrum LabД¬omponents'). This is not anД®rror ! The oscillator + mixer blocks still exist for compatibility reasons,Д«ut the preferred way to 'shift frequencies' is the FFT-based filter Window that the oscillator- and mixer blocks are disabled. The frequency conversion and filtering is now done entirely in the frequencyДomain (inside the 'Filter' runing in FFT mode), so the oscillator / mixer It uses the FFT-basedДЇilter which didn't exist in earlier versions, making it much easier to operate.

Note for 'old-time users' of Spectrum Lab: The 'r' file was modified in 2006. Quick Settings menu which you can use later to recall these settings. Menus'.'Import'.В Select the file 'r', 'r' or Station in Sweden.В More infos are/were available atДЄfter starting Spectrum Lab, go to the menu 'Quick settings'.'User defined Profile 'r' which is contained in Spectrum Lab's installation it's the usual decimal separator in Germany.ДЄll settings required for a receiver for 17.2kHz are contained in the user The neon lamp shall protect the FET against moderate statics,Д«ut it's no protection against lightning. To have approximately half the supply voltage at its drain. Note: The lower FET's source resistor should be tweaked Site, an active antenna like the one shown below may also work for VLF narrowД«and reception (even though it was designed as a broadband antenna see If there are no strong LF-, MF-, and HF-transmitters close to the receiver's In my own tests I have found that the system is very sensitiveД®ven with only passive components (including 2 protection diodes on a 200 This will also protect your soundcard if you connect a longer If you can get the system (describedД«elow)В to work, add a simple LC network parallel to the input as VLF OfВ the soundcard and try to listen to a local signal source (like a Soudblaster 16 has been tested, others work too, but some soundcards don't.)ДЇor a start, just connect some meters of wire as an antenna to the MIC input The amplified audio is sent to the soundcard's D/A converter.ДЄ PC with at least 266 MHz Pentium II, a soundcard (original Creative Labs Soundcard runs at a sample rate of 44100 or 48000 Hz (seeДЇrequency is converted down to an audio frequency of 650Hz (or similar)Д¦50 Hz 'Audio IF' is passed through a narrow-band filter (100Hz BW) The PC is used to convert the VLF signal into an audible signal Note: some links only work if this file is located in the help directoryД¬heck for the latest release of Spectrum Lab somewhere at Operation of Spectrum Lab, 'SAQ' receiver.In the reception of VLF natural radio (which is a broadband audioДЄpplication), there is another document for you. Narrow-band signals in the VLF radio spectrum.

SAQ PANORAMIC VLF RECEIVER HOW TO

This article describes how to use your PC as a receiver for Using a PC with soundcard as a VLF receiver

Saq panoramic vlf receiver