- Digital Signal Processor / TIMEWAVE DSP+9 -
- Documentation -
(Copy of original User Manual)
- Technical data -
Digital Noice filter for amateur radio voice, data and CW operation.
The DSP 9+ filters and reduces noice and interference to improve
radio reception.
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'.
FACTORY SPECIFICATIONS
========================================
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
Bandpass 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
Bandpass 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.........153(W)x 153(D)x 45(H) millimeters
Weight.............0.9Kg
Manufactory........Timewave Technology Inc.
2401 Pilot Knob Road
St. Paul, MN 55120, U.S.A.
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©1999/2000/2001/2002 SM2YER Goran