SPECIALIZED COMMUNICATIONS
RADIO TELETYPE (RTTY)
RTTY is the data communications mode with the longest history. It was originally designed for use with mechanical teletypewriters which were often used before personal computers became common. Now you can easily start operating RTTY with a personal computer and MCP. Unlike Packet, each time you type a letter, it is transmitted over the air. What you typed is transmitted and displayed on the computer screen of the recipient.
RTTY operation uses frequency shift keying (FSK) and the
For the cable connections, refer to “RTTY OPERATION” {page 77}.
For further information, consult reference books about Amateur Radio.
1Access Menu No. 41 and select an FSK shift.
•FSK shift is the difference in frequencies between a mark and a space.
•The 170 Hz shift (default) is normally used on the Amateur bands for the RTTY.
2Access Menu No. 42 and select a
•Select “oFF” (default) to transmit a mark when keying down or “on” to transmit a space.
3Access Menu No. 43 and select “2175” (high tone) or “1275” (low tone) for mark.
•High tone (default) is commonly used nowadays.
4Select an operating frequency.
5Press [MODE] to select FSK mode {page 19}.
•If necessary, access Menu No. 47 to configure the appropriate audio output level for your MCP. The audio output level of ANO (REMOTE connector/ pin 5) changes
{page 78}. The AF control cannot be used to adjust the audio level for your MCP.
7Follow the instructions provided with your MCP and enter a command from your computer to transmit.
•The LED changes from green (RX) to red (TX).
8Begin sending data from your computer.
•Press [PWR/ 4/ TX MONI] (1 s) to monitor your signals. Press [PWR/ 4/ TX MONI] (1 s) again to quit this function.
9When finished transmitting, enter a command from your computer to return to reception mode.
•The LED changes from red (TX) to green (RX).
The following frequencies (measured in kHz) commonly used for RTTY operation:
U.S.A./ Canada | ARU Region 1 | |||
(Europe/ Africa) | ||||
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1800 | ~ 1840 | 1838 | ~ 1842 | |
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3605 ~ 3645 (DX: 3590) | 3580 | ~ 3620 | ||
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7080 ~ 7100 (DX: 7040) | 7035 | ~ 7045 | ||
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10140 | ~ 10150 | 10140 | ~ 10150 | |
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14070 ~ 14099.5 | 14080 ~ 14099.5 | |||
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18100 | ~ 18110 | 18101 | ~ 18109 | |
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21070 | ~ 21100 | 21080 | ~ 21120 | |
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24920 | ~ 24930 | 22920 | ~ 24929 | |
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28070 | ~ 28150 | 28050 | ~ 28150 | |
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Note: The
6Some stations may be operating in Reverse shift. In this case, press [MODE] (1 s) to reverse the shift (the upper sideband is used).
•“FSR” appears.
•Traditionally, the lower sideband is used for FSK operation. Press [MODE] (1 s) again to return to the lower sideband. “FSK” appears.
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