signal

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signal

478 links - and 11 categories

Antennas : Quadrifilar Helix
  • QFH antenna for NOAA Satellites - NOAA Satellite Signals With a PVC QFH Antenna and Laptop, this website also link to a github where you can find files and supporting documentation for constructing a QFH Antenna
    [ Hits: 411 | Votes: 6 | Rating: 6.5 ]
  • Making a Quadri Filar Helix antenna - Lot of pictures, drawings and schematics to build your own QFH Quadri Filar Helix antenna for 137 MHz satellite signals reception
    [ Hits: 451 | Votes: 6 | Rating: 3.83 ]
Antennas : Traps
  • Tuning Antenna Traps - The problem with making your own trapped HF antennas is usually getting the coaxial traps tuned to frequency. This article explains a method using a RF signal generator at +10dBm output into the coaxial trap.
    [ Hits: 275 | Votes: 2 | Rating: 6.5 ]
Internet and Radio : Sounds
  • Data Sound Samples - This page contains links to a variety of data signals that have been specially recorded. Each file contains a standard test message (the quick brown fox jumped over the lazy dog) repeated twice. The files can help you learn the characteristic sound of various data modes but they can also be used to make sure your decoder is working.
    [ Hits: 247 | Votes: 0 | Rating: 0 ]
Operating Aids : Time
  • Why WWV and WWVH Still Matter - Fans of NIST signals cite benefits including understanding the near-Earth environment
    [ Hits: 166 | Votes: 3 | Rating: 10 ]
Operating Modes : Digital Modes
  • Digital Mode General Operating Tips - Start by getting your audio levels sorted out, Having your levels correct is critical to maximum effectiveness in both TX quality and also for being able to decode signals properly. Guide to Filters and other Rig Settings to optimize your output signal
    [ Hits: 183 | Votes: 1 | Rating: 9 ]
  • Soundcard Levels for Digital Modes - This article aims to help promote the proper configuration for having a clean signal on the waterfall to avoid interference to other users and also to vastly increase the effectiveness of your signal.
    [ Hits: 279 | Votes: 0 | Rating: 0 ]
Operating Modes : FT8
  • FT8 and splatter and the ugliness of ALC - A guide to properly use FT8 ALC and power when transmitting in FT8 Mode. Incorrect usage of power and audio from your computer may cause unreadable signals and transmit harmonics that can didturb other signals.
    [ Hits: 387 | Votes: 1 | Rating: 1 ]
Operating Modes : PSK31
  • PSK: How to Assure a Clean Signal - Due to the nature of PSK it is imperative that you maintain a very clean signal. In this page you will find examples of a clean PSK signal and one with excessive splatter, and a short guide on how to properly adjust your transmitter to assure a clean trace
    [ Hits: 137 | Votes: 0 | Rating: 0 ]
Operating Modes : Weak Signal
  • Weak Signals - Reduce volume to reduce noise - This article discusses how volume reduction can help in the reception of weak signals by reducing the noise level. It is commonly known that reducing the volume also reduces the background noise, and especially in the reception of weak digital signals it can be beneficial
    [ Hits: 228 | Votes: 1 | Rating: 10 ]
Radio Equipment : HF Transceivers : Yaesu FT-817
  • 2.3GHz to 432MHz RX converter for FT-817 - A very small receiver converter that can be plugged to the backside of the battery powered portable transceiver FT817 from Yaesu. A high performance receiver for 2.3GHz amateur radio signal
    [ Hits: 223 | Votes: 3 | Rating: 1.67 ]
Radio Scanning : Radio Scanning Reference Software : Beacon Monitoring
  • PI-RX - PI-RX is a beacon monitoring program capable of decoding PI4 and showing the performance of the decoded signal
    [ Hits: 140 | Votes: 1 | Rating: 9 ]
Software : Signal Generator
  • AF signal function generator for Windows - Windows signal function generator sotfware, offers 4 main channels, 4 modulators, 1 measurement generator, 1 frequency standard generator, Amplitude, phase and frequency modulation, can generates real band-limited signals
    [ Hits: 611 | Votes: 4 | Rating: 3 ]
Software : Weak Signal
  • WSQCall A Weak Signal QSO mode for LF/MF - Amateur Radio enthusiasts who are interested in the LF and MF bands may be familiar with WSPR and WSJT JT9. Used as a propagation probe or beacon, WSPR allows very weak signals to be detected, frequently as weak as -27dB SNR.
    [ Hits: 186 | Votes: 0 | Rating: 0 ]
  • PSKReporter Viewer - Do you want to see how your FT8 signals are being received in the other parts of the globe?
    [ Hits: 265 | Votes: 0 | Rating: 0 ]
Software : Weather and FAX
  • METEOR M decoder - A portable decoder for METEOR M weather satellite LRPT signal, available for windows and Linux
    [ Hits: 386 | Votes: 0 | Rating: 0 ]
Technical Reference : Key Clicks
  • Preventing CW key clicks - Key clicks are generally undesired clicks or thumps generated by a CW transmitter as the key is put down or let up. How much does the rise time or bandwidth of a CW signal need to be limited to prevent other QSOs on adjacent frequencies from being annoyed by key clicks?
    [ Hits: 93 | Votes: 0 | Rating: 0 ]
Technical Reference : Software Defined Radio : RTLSDR
  • Using the RTL-SDR Pan-adapter - How to setup a band-tracking panoramic signal display to work along to your transceiver.
    [ Hits: 301 | Votes: 2 | Rating: 10 ]
Technical Reference : Test Equipment
  • Antuino - Antenna Test Equipment - Antuino is an accurate instrument that can be used in the field to measure SWR, field strength, modulation, etc. In the lab, it can be used to sweep filters, measure gain, distortion, frequency response, etc. It works upto 150 Mhz. On the third harmonic, it is usable on 435 Mhz band as well (with reduced sensitivity).
    [ Hits: 304 | Votes: 0 | Rating: 0 ]

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