fm modulation
8 links
- VHF Amplitude Modulation (AM) Operations
- An article on amplitude modulation (AM) operation on VHF bands.
[ Hits: 166 | Votes: 0 | Rating: 0 ]
- BCFMCA D-STAR System
- British Columbia Frequency Modulation Communications Association
[ Hits: 400 | Votes: 0 | Rating: 0 ]
- Ham Radio: Using Repeaters
- The most basic form of repeater receives communication on one frequency and re-transmits at a different frequency. This is known as duplex communication.
Repeaters are generally set up to operate with FM modulation on the amateur bands within the VHF (30 MHZ – 300 MHZ) and UHF frequencies (300 MHZ – 3 GHz). These are generally the frequencies used by handheld and mobile devices.
[ Hits: 92 | Votes: 1 | Rating: 8 ]
- Simplex
- SIMPLEX is a free windows program which transforms any transceiver into an audio repeater. It works on HF, VHF, UHF etc with SSB, CW, FM, packet, SSTV and every modulation mode.
[ Hits: 8830 | Votes: 21 | Rating: 7.75 ]
- 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: 1543 | Votes: 10 | Rating: 7.8 ]
- sodiraSDR - Software Radio
- Software Defined Radio (SDR) for analog and digital modulation modes, can demodulate AM envelope, AM synchronous, AM stereo, LSB, USB, FM, FM Broadcast, DRM30, DRM+
[ Hits: 357 | Votes: 4 | Rating: 8.75 ]
- VARA
- VARA HF is a soundcard modem that can be found on the HF bands exchanging traffic (Winlink). VARA implements an High Speed Data Mode and comes in 2 separate programs VARA FM and VARA HF. VARA is a High Performance HF modem based on OFDM modulation. VARA Modem, brings state of the art Military grade technology to new and existing HF data. Introduces a new standard of technology available for Amateur and Commercial use. Designed for operation within a SSB Bandwidth of 2400 Hz.
[ Hits: 103 | Votes: 1 | Rating: 10 ]
- 5th order High Pass VHF Filter
- Sometimes many VHF-UHF modern transceivers have problems with BROADCAST Interference and CROSS-modulation from FM commercial broadcast stations this article shows a simple Batteworth HI-Pass VHF Filter to reduce this problem
[ Hits: 1209 | Votes: 8 | Rating: 6.12 ]
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