DSP-599zx Audio Noise Reduction Filter
March 6, 1997
6-1
6
Data Mode
Introduction
Data signals like CW and RTTY require bandpass filters with steep skirts
and linear phase response. Linear phase response maximizes the usable sig-
naling rate for a given bandwidth. The baud rate, center frequency and fre-
quency shift of a data signal determine the bandwidth of filter for that data
signal. In the Data Filter mode, the DSP-599zx has an array of band-pass fil-
ters optimized for the most common high frequency (1.8-30 MHz) data
modes.
The DSP-599zx also has a built in RTTY modem. The RTTY modem de-
modulates received RTTY audio tones and generates audio frequency shift
keyed signals.
A third option within Data mode is the RTTY remodulator mode. This is a
special receiving mode that regenerates the data tones to send them to an ex-
ternal modem.
Configuration of the RTTY modem is done as part of Setup - Data. You can
choose to have channel
A
line output function as a the RTTY modem output
or have channel
B
function as the RTTY modem output.
The RTTY remodulator is selected by pressing the
[Function]
key.
Operations Common To All Data Types
Basic Data Mode Operation
•
Pressing
[Mode]
to select the Data mode.
•
Turn the left knob to select the appropriate data filters.
•
Turn the middle knob slightly to vary the filter bandwidth to suit the
band conditions.
Function
6
Shift
5
AGC
3
Bypass
Data
DSP-599zx
CW
Voice
Mode
1
Random
4
Tone
2
599-056
Setup
Test
Rcl/
Store
Spkr/
Chan
High Pass
Center Freq
Timewave
Low Pass
Bandwidth
March 6, 1997
Summary of Contents for DSP-599zx
Page 1: ...DSP 599zx Audio Noise Reduction Filter Operating Manual March 6 1997 TECHNOLOGY INC ...
Page 56: ...4 Voice Mode 4 8 March 6 1997 ...
Page 62: ...5 CW Mode 5 6 March 6 1997 ...
Page 92: ...8 Troubleshooting 8 4 March 6 1997 ...
Page 96: ...Appendix B Glossary A 4 March 6 1997 ...
Page 98: ...Appendix C Product Warranty A 6 March 6 1997 ...
Page 100: ...Appendix D Electromagnetic Interference A 8 March 6 1997 ...
Page 102: ...Appendix E Schematic Diagrams A 10 March 6 1997 ...
Page 103: ...DSP 599zx Audio Noise Reduction Filter March 6 1997 A 11 ...
Page 104: ...Appendix E Schematic Diagrams A 12 March 6 1997 ...
Page 105: ...DSP 599zx Audio Noise Reduction Filter March 6 1997 A 13 ...
Page 106: ...Appendix E Schematic Diagrams A 14 March 6 1997 ...
