Timewave DSP-599zx, Operating Manual

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DSP-599zx Audio Noise Reduction Filter
March 6, 1997 A-1
Appendix A
Specifications
AUDIO INPUT A & B
Impedance 20 K ohms or 25 ohms, jumper selectable
input signal range for full
output 10 mV to 1.0 volt, front panel programmable
AUDIO OUTPUT A & B
Speaker output power 1.0 watts into 8 ohms at 13.8 VDC, both output channels A & B operating,
1.5 watts into 4 ohms at 13.8 VDC, both output channels A & B operating,
Line output 0 dB level referenced to input level . Not controlled by gain control
Headphone Jack 1/4” two-circuit jack, use stereo headphones to use all functions, mono headphones for most functions
Harmonic Distortion less than 1% at rated output
NOISE REDUCTION FILTERS
Frequency Range Attenuation Type Delay
Random Noise Reduction entire freq. range of selected filter Up to 20 dB, varies with noise characteristics.
Noise reduction aggressiveness front panel ad-
justable
Adaptive 5 msec max
Heterodyne Eliminator (mul-
tiple automatic notch) entire freq. range of selected
bandpass filter Up to 50 dB, varies with noise characteristics Adaptive 5 msec max
Heterodyne Eliminator (man-
ual notch) entire freq. range of selected
bandpass filter Up to 50 dB, varies with noise characteristics manual
Note: The random noise reduction and bandpass filters can operate simultaneously.
The random noise reduction, tone notch and highpass/lowpass filters can operate simultaneously.
CW FILTERS
CW filters Bandwidth = 5 Hz to 600 Hz, 10
Hz steps.
Center freq. = 200 to 2150 Hz, 5
Hz steps,
55 dB at 60 Hz outside the passband FIR Linear
phase BW less than
20 Hz=
64 msec max
BW greater
20 Hz=
40 msec max
CW Marker Tone Sine wave at center freq. of selected CW filter.
DATA FILTERS
RTTY, AMTOR,
PACTOR,
G-TOR,
HF Packet Mark/Space bandwidth 60 Hz to
100 Hz, Center Freq.= 2210 Hz
plus options of 1700, 1360, 1300,
1530 or 2125 Hz 40 dB at 60 Hz outside the passband FIR Linear
phase 38 msec max
Note: RTTY and AMTOR filters have a notch at the center frequency .
CLOVER 2000-2500 Hz 55 dB at 75 Hz outside the passband
FIR Linear
phase 21 msec
max
SSTV 1100-1300 Hz & 1500-2300 Hz 50 dB at 75 Hz outside the passband
Composite
FIR Linear
phase 21 msec
max
WeFAX 1500-2300 Hz 55 dB at 75 Hz outside the passband
FIR Linear
phase 21 msec
max
FSK Marker Tones 1) RY string - Alternating sine waves at mark-space freq. of selected data filter (170 or 200 Hz shift).
Baud rate matches selected RTTY data mode.
2) Sync-Nul Character (Diddle) - Baud rate matches selected data filter.
March 6, 1997