Digital Operation, Rtty Frequencies | Kenwood TS-570S, TS-570D

DIGITAL OPERATION	6 If necessary to be compatible with the station you
		want to contact, press [REV] to reverse the
Since Multimode Communications Processors (MCP)		transceiver to the upper sideband.
have become popular, many Amateurs enjoy operating		• “R” appears beside “FSK”.
using a number of digital modes. The power and		• “R” appears beside “FSK”.
using a number of digital modes. The power and
variety of Amateur radio increased greatly with the
variety of Amateur 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
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		• Traditionally, the lower sideband is used for FSK
deposit mail in a regional mailbox for forwarding. After		• Traditionally, the lower sideband is used for FSK
deposit mail in a regional mailbox for forwarding. After		operation.
that, you may switch to G-TORTMor Clover for a		operation.
that, you may switch to G-TORTMor Clover for a		• Press [REV] again if you want to return to the
lightning fast file transfer with a friend.		• Press [REV] again if you want to return to the
		lower sideband.

RTTY (FREQUENCY SHIFT KEYING)

Radioteletype operation uses frequency shift keying (FSK) and the 5-bit Baudot code or the 7-bit ASCII code to transmit information.

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.

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.