My test schematics is here. http://zao.jp/radio/tx/
Miura Kazunori さんは書きました: > > > Hello > > I tested IQ transmitter software with 74HC4052 modulator on 50MHz. > My modulator work with DG8SAQ SSB IQ Generator well. > > Short test result is here. > I can get only SSB mode on center frequency. > Shift frequency does not work. > AM and FM functions seems no action. > > My OS is Windows2000 and Sis 7018 sound driver. > > Thank you for good software. > I want to read this source code. > > best 73 > > JA7TDO > > Andy Talbot さんは書きました: > > > > > > Peter Martinez G3PLX has written a small stand-alone piece of Windows / > > PC software for a Software Defined Transmitter. The software > > is intended to run as a companiom to the various SDR receivers out there > > to give a transmit and receive capability. > > > > The program takes its input from a microphone and generates the I / Q > > signals as a stero output pair for driving a quadrature image > > cancelling upconverter. As well as Upper and Lower Sideband Peter has > > included AM and FM modes, having developed a crafty technique involving > > a subaudible tone to overcome the lack of DC response on PC > > soundcards. A tone generator allows CW and testing; there is automatic > > microphone gain adjustment and the ability to fine tune the phase and > > amplitude balance between channels. The carrier frequency can be offset > > from the centre by a few kHz if desired. The software can run on a > > single soundcard for input and output, or it can make use of two > > soundcards (freeing up the other half of each for other purposes). > > > > The software and a full description of the process can be found on my > > website, at the URL given below. To kick-off hardware building, I have > > included details of three I/Q upconverters developed over the > > years. Two for HF use - a simple quickie design using NE612 chips, and > > a high spec one with carrier/sideband balance for lab / testing > > purposes. Also, one for 144MHz primarily aimed at driving the IF for > > microwave transverters. There are a few ideas and pointers at other > > routes, especially for microwave use. > > > > Many thanks to Peter for coming up with this software so quickly after I > > mentioned it to him last week. He is still tweaking it slightly, so > > modified versions may appear from time to time. It has been tested so > > far with Windows XP, 2000 and NT, and works fine - we haven't tried any > > other operating system. > > > > Andy G4JNT > > > > www.scrbg.org/g4jnt <http://www.scrbg.org/g4jnt > <http://www.scrbg.org/g4jnt>> > > www.scrbg.org/g4jnt/SDRTransmitters.htm > > <http://www.scrbg.org/g4jnt/SDRTransmitters.htm > <http://www.scrbg.org/g4jnt/SDRTransmitters.htm>> > > > > > >
