DSP-599zx Audio Noise Reduction Filter
March 6, 1997
6-7
ing clean contacts and generates QRM for everyone else. Carefully follow
your transceiver or transmitter instructions for input drive level. See DSP-
599zx Installation - Line Output Signal Level Setup (page 2-12) for in-
structions on setting DSP-599zx line output level.
The FSK output signal from pin 5 on the DIN connector on the DSP 599zx
can directly drive a FSK input on a transceiver. See Installation - RTTY Mo-
dem Input/Output (page 2-10) for more information on connections.
The RTTY modem has signal decoding; it modulates and demodulates only!
A computer with a terminal program is required to use the RTTY modem.
Timewave does not supply the terminal program.
RTTY Remodulator Operation
The RTTY remodulator is a special mode for receiving RTTY. Its function
varies slightly depending upon if you are using the DSP-599zx internal
RTTY modem or using an external multimode controller:
•
Press
[Mode]
to select the Data mode.
•
Turn the left knob to select the appropriate RTTY data filters.
•
Press
[Function]
to select the remodulator.
•
The middle knob now adjusts the DCD threshold.
The LED illuminated next to the
[Function]
button indicates the RTTY re-
modulator is selected. The DSP-599zx filters and demodulates the received
RTTY signal. Then The DSP-599zx generates a new set of RTTY tones that
are modulated by the output of the RTTY demodulator.
The incoming signal is sent to the speaker/headphone and the remodulated
signal is sent through the line output. Only the pure audio RTTY tones are
sent to your multimode controller. You still need to monitor the incoming
signal for quality. You still need to be tuned in and may need to adjust band-
width.
When using the RTTY modem the process is similar. Pressing
[Function],
however only toggles the middle knob between
[Bandwidth]
and
[DCD]
threshold.
Function
6
Shift
5
AGC
3
Bypass
Data
DSP-599zx
CW
Voice
Mode
1
Random
4
Tone
2
599-057
Setup
Test
Rcl/
Store
Spkr/
Chan
High Pass
Center Freq
Timewave
Low Pass
Bandwidth
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 ...
