Kenwood TS-590S Manual Do Utilizador

37

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 
type is transmitted and displayed on the computer 
screen of the recipient.

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

For cable connections, refer to “RTTY OPERATION” 
{page 68}.

For further information, consult reference books about 
Amateur Radio.

1 Access Menu No. 44 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.

2 Access Menu No. 45 and select a key-down 

polarity.

•

Select “oFF” (default) to transmit a mark when 
keying down or “on” to transmit a space.

3 Access Menu No. 46 and select “2175” (high tone) 

or “1275” (low tone) for mark.

•

High tone (default) is commonly used 
nowadays.

4 Select an operating frequency.

5 Press [CW/FSK (REV)] to select FSK mode.

•

“FSK” appears.

•

If necessary, access Menu No. 67 to configure 
the appropriate audio output level for your 
MCP.  The audio output level of ANO (ACC2
connector/ pin 3) changes {page 65}.  The AF
control cannot be used to adjust the audio level 
for your MCP.

6 Some stations may be operating in Reverse shift.

In this case, press and hold [CW/FSK (REV)] to 
reverse the shift (the upper sideband is used).

•

“FSR” appears.

•

Traditionally, the lower sideband is used for 
FSK operation.  Press and hold [CW/FSK
(REV)] again to return to the lower sideband.
“FSK” appears.

7 Follow the instructions provided with your MCP 

and enter a command from your computer to 
transmit.

•

The TX-RX LED changes from green (RX) to 
red (TX).

8 Begin sending data from your computer.

•

Press and hold [PWR (TX MONI)] to monitor 
your signals.  Press and hold [PWR (TX MONI)] 
again to quit this function.

9 When finished transmitting, enter a command from 

your computer to return to reception mode.

•

The TX-RX LED changes from red (TX) to 
green (RX).

The following frequencies (measured in kHz) are 
commonly used for RTTY operation:

1800 ~ 1840

1838 ~ 1842

3605 ~ 3645 (DX: 3590)

3580 ~ 3620

7080 ~ 7100 (DX: 7040)

7035 ~ 7045

10140 ~ 10150

10140 ~ 10150

14070 ~ 14099.5

14080 ~ 14099.5

18100 ~ 18110

18101 ~ 18109

21070 ~ 21100

21080 ~ 21120

24920 ~ 24930

22920 ~ 24929

28070 ~ 28150

28050 ~ 28150

PSK31 is a digital modulation method used in 
amateur radio communications.  You can perform data 
communications in real-time using a keyboard, like 
RTTY.  Additionally, because of the narrow bandwidth 
(31.25 Hz) you can even use PSK31 on congested 
frequencies.  Another merit to PSK31 is that it can 
be enjoyed with a simple antenna and low transmit 
power.

Using the sound function of your PC along with 
PSK31 software, many amateur radio operators enjoy 
PSK31.

•

Refer to “TNC AND MCP” {page 69} for 
connections.

•

When managing PSK31 using the sound capability 
of a PC, use SSB mode.

•

Set AGC to fast.

•

Turn off the speech processor.

•

Refer to “EXTERNAL AUDIO SETTINGS” 
{page 58} for Audio Settings.

For further information, consult reference books about 
Amateur Radio.