TONO Θ-350 INSTRUCTION MANUAL
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2. FEATURES
1. Communications Computer Θ-350
Due to the most up-to-date computer technology, one piece of equipment can now handle re-
ceiving in CW, RTTY and ASCII.
2. VHF and Composite video output provided
Both a home TV set and video monitor outputs are provided for display purposes.
3. Printer interface
Centronics para. Compatible interface enables easy connection of a low-cost dot printer for
hard copies. Can be connected directly with HC-800 & HC-900.
4. Wide range of receiving speeds
Automatic CW speed adjustment and 8 Communication speeds for RTTY and ASCII. The multi-
ple speed feature makes the Θ-350 ideal for Amateur, business and commercial use.
5. Built-in demodulator for high performance
Three-step shift (either 170 Hz, 425 Hz, 850 Hz) can be obtained using either High Tones or
Low Tones. Manual adjustment is available by FINE TUNING Control.
6. Anti-Noise
A new anti-noise circuit prevents garbled message when there is no signal.
7. Large capacity display memory
The two-page display memory contains 32 characters × 16 lines per page. Page selection is
operated via the keyboard.
8. WORD-WRAP-AROUND function
Word-wrap-around prevents the last word of the line from splitting in two.
9. MARK-AND-BREAK (SPACE-AND-BREAK) system
Either mark or space tone can be used to copy RTTY.
10. Monitor circuit
A built-in monitor circuit with an automatic receive switch enables checking of the receiving
state. It is possible to check the output of the mark filter, the space filter and AGC amplifier prior
to the filters.
11. CW practice function
The Θ-350 reads data from the key and displays the characters on the screen.
12. Cross-pattern checking output terminal
Provision has been made for attachment of an oscilloscope to aid tuning. This supplements the
tuning LED and audio monitor provided in the system.
