7 SPECIALIZED COMMUNICATING
DIGITAL OPERATION
Since Multimode Communications Processors (MCP) have become popular, many Amateurs enjoy operating using a number of digital modes. The power and varietyofAmateur radio increased greatly with the development of MCP that can use your transceiver as the communications link.
For example, it’s possible to take advantage of the camaraderie found on RTTY, then move to Packet to access an RBBS (Radio Bulletin Board System) to download a recent shareware program you’ve heard about, and then move again to AMTOR or PacTOR to deposit mail in a regional mailbox for forwarding. After that, you may switch to
RTTY (FREQUENCY SHIFT KEYING)
Radioteletype operation uses frequency shift keying (FSK) and the
Consult “RTTY” {page 61} under “CONNECTING PERIPHERAL EQUIPMENT” if you need installation information.
1Select the FSK shift via Menu No. 29.
•FSK shift is the difference in frequencies between mark and space.
•The 170 Hz default is used on the Amateur bands.
2Access Menu No. 30, and select either “ON” (space) or “OFF” (mark) to be transmitted when keying down.
• The default is “OFF” (mark).
3Access Menu No. 31, and select high tone (2125 Hz) or low tone (1275 Hz) for mark.
•The high tone (default) is commonly used nowadays.
4Select the operating frequency.
5Press [CW/FSK] to select FSK.
• “FSK” appears.
6If necessary to be compatible with the station you want to contact, press [REV] to reverse the transceiver to the upper sideband.
• “R” appears beside “FSK”.
•Traditionally, the lower sideband is used for FSK operation.
•Press [REV] again if you want to return to the lower sideband.
7Following the instructions provided with your MCP or RTTY equipment, enter the key sequence at your RTTY keyboard to select the transmit mode.
•“RX” disappears and “TX” appears.
•You may instead press [SEND] to manually select the transmit mode.
8Begin sending data from the keyboard.
•No transmit carrier or AF input level adjustment is necessary.
•Use Menu No. 34 to select the appropriate AF output level. The AF control cannot be used for this adjustment.
9When finished transmitting, enter the key sequence from the keyboard to return to the receive mode.
•“TX” disappears and “RX” appears.
•If you pressed [SEND] in step 7, press [SEND] again.
RTTY FREQUENCIES
IARU Region 1 | U.S.A./Canada | |
(Europe/Africa) | ||
Frequency (kHz) | ||
Frequency (kHz) | ||
| ||
1838~1842 | 1800~1840 | |
3605~3645 | ||
3580~3620 | ||
(DX: 3590) | ||
7080~7100 | ||
7035~7045 | ||
(DX: 7040) | ||
| ||
10140~10150 | 10140~10150 | |
14080~14099.5 | 14070~14099.5 | |
|
| |
18101~18109 | 18100~18110 | |
|
| |
21080~21120 | 21070~21100 | |
|
| |
24920~24929 | 24920~24930 | |
|
| |
28050~28150 | 28070~28150 | |
|
| |
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