Xref: utzoo sci.electronics:3115 rec.ham-radio:5093 Path: utzoo!attcan!uunet!lll-winken!lll-lcc!lll-tis!helios.ee.lbl.gov!pasteur!agate!eos!labrea!glacier!jbn From: jbn@glacier.STANFORD.EDU (John B. Nagle) Newsgroups: sci.electronics,rec.ham-radio Subject: Modem-type chips for non-telephone channels Keywords: modem demodulator Message-ID: <17490@glacier.STANFORD.EDU> Date: 14 Jun 88 03:30:43 GMT Organization: Stanford University Lines: 12 What simple chips or modules are available for data transmission over a good-quality audio channel? I'd like to get 15Kb or more, and have an audio channel with about 15KHz bandwidth. The link is simplex; it's a telemetry system. So systems with handshaking, cooperative equalization, and retransmission are out. This eliminates some of the more exotic modem technologies, but then, at 1 baud per hertz, they should not be necessary. Someone mentioned some new Motorola parts here recently, but I don't have the reference. Did anyone catch that go by? John Nagle