modulation

modulation

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• Sounds of the Commercial and Military Digital Station - Information and digital audio samples of various modem modulation types
  [ Hits: 1651 | Votes: 4 | Rating: 3.5 ]

• LBA Technology - LBA - DTV & RF test systems; AM antennas; RF shielding; RF compliance, safety, interference, intermodulation services; AM detuning, Antenna SWR Analyzers
  [ Hits: 688 | Votes: 1 | Rating: 7 ]

• AM Forever - Amplitude Modulation Forever for ham radio operators, shortwave listeners and collectors
  [ Hits: 360 | Votes: 1 | Rating: 10 ]
• AM explained - About Amplitude-Modulation
  [ Hits: 393 | Votes: 2 | Rating: 7.5 ]
• Amplitude Modulation - Amplitude Modulation (AM) is essentially a mixing process where the audio modulating signal is mixed with the radio frequency carrier
  [ Hits: 251 | Votes: 1 | Rating: 2 ]
• VHF Amplitude Modulation (AM) Operations - An article on amplitude modulation (AM) operation on VHF bands.
  [ Hits: 166 | Votes: 0 | Rating: 0 ]

• A Look inside D-STAR Modulation - An overview on the D-Star modulation, Block diagram, GMSK and digital modulation
  [ Hits: 1285 | Votes: 0 | Rating: 0 ]

• Quest for Optimum Coding for EME - Quest for Optimum Coding and Modulation Schemes for EME Joe Taylor, K1JT Florence EME conference 2008
  [ Hits: 450 | Votes: 0 | Rating: 0 ]

• Transmitter Bandwidth and Splatter - Technical Comments about Transmitter Intermodulation, Distortion, and ESSB (or Hi Fi Wide Fi SSB) audio or over equalization by W8JI
  [ Hits: 258 | Votes: 1 | Rating: 10 ]

• Kenwood TS-690 Modulation Mod - TS-690 50 MHz modulation problem solved
  [ Hits: 400 | Votes: 1 | Rating: 10 ]

• DSPRX - Signalprocessing for SSB - Direct Conversion Receiver using Phasemethod for Sideband Supression, does all necessary signalprocessing for Direct conversion Receivers using IQ-mixer for demodulation.
  [ Hits: 2477 | Votes: 0 | Rating: 0 ]

• JMSK - JMSK is a software modem that implements a good coherent MSK demodulator that has performance comparable to BPSK. Signals are demodulated from the soundcard. Modulated signals can be routed through the soundcard or to an external device such as a DDS module for direct RF modulation. The advantage of MSK compared to PSK is that non linear amplifiers can be used and has a faster roll off. It is an open source cross-platform program written in C++ Qt.
  [ Hits: 372 | Votes: 2 | Rating: 5.5 ]

• PocketPacket Mac OS - PocketPacket started as an APRS client for iPhone/iPod Touch/iPad devices, but is also available for the Mac desktop or laptop. PocketPacket incorporates a software-based TNC, allowing you to directly capture and visualize, or encode and transmit 1200 baud packets (AFSK modulation) using a VHF radio transceiver.
  [ Hits: 1103 | Votes: 2 | Rating: 7.5 ]

• SoDiRa - Windows Software Defined Radio SDR for analogue and digital modulation types. Can decode AM and FM+RDS radio as well as DRM/DRM+ and time signals DCF77/HBG. Sodira supports the use of the RTL-SDR through use of the ExtIO_RTL2832.dll module. Demo version available.
  [ Hits: 1544 | Votes: 10 | Rating: 7.8 ]

• VersaBeacon Project - The VersaBeacon is a frequency agile, modulation agile RF source using a DDS chip and minimal support circuitry. It covers a frequency span of 1MHz to 150MHz in 1 Hz steps and provides a variety of modulations
  [ Hits: 584 | Votes: 0 | Rating: 0 ]
• The AVR Beacon Super Keyer - Description of an HF beacon keyer with telemetry. What makes the keyer rather different is its versatility - it is a multi-mode unit, with ASK and FSK modulation, sending Feld-Hell and Morse on command
  [ Hits: 283 | Votes: 0 | Rating: 0 ]

• Receivers sorted by IM3 - Sorted by Intermodulation. Best receiver first. This is a measure of how badly a close-spaced signal will trash your receiving with spurious signals or splatter sounds,
  [ Hits: 690 | Votes: 0 | Rating: 0 ]

• Quadrature ( I-Q ) Modulation Tutorial - Learn quadrature modulation through interactive flash programs. These programs will allow you to learn about quadrature modulation and quadrature demodulation without getting overwhelmed by math.
  [ Hits: 721 | Votes: 7 | Rating: 3.43 ]

• 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: 305 | Votes: 0 | Rating: 0 ]

• Using Oscilloscope to monitor Modulation - Scope out your SSB or AM audio modulation. A ham radio related guide on using an Oscilloscope to check exciter and amplifier modulaton for low distortion and system linearity by NU9N
  [ Hits: 542 | Votes: 1 | Rating: 9 ]

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