6 – Data Mode
6-6
March 6, 1997
RTTY Modem Operation
The RTTY modem both demodulates received RTTY audio tones and gen-
erates AFSK and AFSK signals.
The modem is operational whenever you are in one of the RTTY modes.
You need, however, to have a computer connected to the RS-232 port on the
DSP-599zx and have appropriate software terminal program that can decode
and encode Baudot and ASCII. Timewave does not provide the terminal pro-
gram. You will also need to make appropriate cables to connect from the
DIN connector to your transceiver. Consult your transceiver user manual for
specific information.
•
Press
[Mode]
to select the Data mode.
•
Turn the left knob to select one of the RTTY filters.
•
Press
[Shift+Function]
to turn the tuning display on.
•
Tune in a RTTY signal on the receiver connected to the DSP-599zx.
•
Adjust the receiver frequency so that the Mark and Space bars on the
display are approximately equal length.
•
Press
[Function]
to switch the middle knob from
[Bandwidth]
to
[DCD]
(Data Carrier Detect).
•
Turn middle knob
[DCD]
for clean error-free copy on your terminal
display.
•
The DCD setting, with a range of 1 - 9, is displayed on the lower right
corner of the display. When a data carrier is detected that exceeds the
DCD setting, an asterisk (*) is displayed next to the DC setting.
•
7;
is displayed when the terminal program is switched to transmit.
!
Power your computer on first.
When your have a computer connected to the DSP-599zx, take
care to turn the power on for the computer first. Then turn on the
DSP-599zx. Under some circumstances, the DSP-599zx will
power up in transmit mode keying your transmitter if the comput-
er power is turned on last.
The AFSK output signal from the line output jack and pin 1 of the DIN con-
nector on the DSP-599zx can drive the microphone input or AFSK input on
a transceiver. Do not over-drive your transceiver. It prevents you from mak-
Function
6
Shift
5
AGC
3
Bypass
Data
DSP-599zx
CW
Voice
Mode
1
Random
4
Tone
2
599-040
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 ...
