========================= TimeWave DSP ========================= This is some information, mostly about the unit 'DSP+9' that i use.The image above shows the 'DSP+9' and 'DSP+59' (To the left) on the top of an Kenwood TS850SAT The image is 'abducted' from a HAM-Magazine (QTC nr#9 1999) in the article 'SM4ATJ' make some interesting comparing,- using two setups. Setup 1. A 'old' TS-850 with external DSP+9 unit and Setup 2. The 'new' TS-570 (1999) with built in DSP. The most interesting finding he makes is that the 'old one' with external DSP beats the new one in most cases, when it comes to handling signals with great difference in strength its outstanding.
This image shows 'HOW-TO' hook it up. The Audio output from the rig goes to the DSP+9 and then to an external speaker, its as simple as that. The PTT lead is used to attenuate the AF-Input on the DSP to avoid LF- Feedback during TX. How it works... The TimeWave DSP+9 makes use of computer controled digital signal processing technology to reduce Random/Tone and Noice interferance in incoming signals. It implement the computer controled algorithms to perform four basic functions: 1) Random noise reduction 2) Adaptive multi-tone notch filtering (Heterodyne TONE noice reduction) 3) Bandbass filtering 4) RTTY remodulation Al these can be used one by one or al togheter in numerous combinations. The signal is feed into the device and the characteristic of the signal and noise is analyced using a method called 'correlation'. The DSP+9 measures degree of correlation and filters out wanted signals from noise and Heterodyne tones, this is all done in 'real-time'. Some data This is data for the VOICE mode only! (I leave the CW and DATA modes whit out any remarks.) - Random Noice Reduction Is done on the entire freq. range of any selected pandpass filter. Attenuation up to 20dB, varies with noice characteristics. Type: Adaptive with Maximun 10msec delay. - Tone Noice Reduction (Multiple auto notch) Is done on the entire freq. range of any selected pandpass filter. Attenuation up to 50dB, varies with noice characteristics. Type: Adaptive with Maximun 10msec delay. - Bandpass (VOICE) 300-3.4kHz, 300-2.7kHz, 300-2.1kHz or selected by jumper set 300-2.7kHz, 300-2.3kHz, 300-1.9kHz With Attenuation of 60dB @180Hz outside of passband Type: FIR Linear phase. Maximun 10msec delay. - AGC Voice Mode 36dB Data/CW Mode 18dB - Dimensions Size: 153mm Wide x 153mm Deep x 45mm High Weight: 0.9kg Also wisit TimeWave Inc. On the web. /73 de sm2yer Goran *** End of Page *** <-- Back!