Kenwood TS-990S, Instruction Manual

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5-35
ASSISTING YOUR SMOOTH QSO 5
Index Contents
RTTY OPERATION
The transceiver is equipped with an encoder/decoder for
RTTY operation. You can use a commercially available
USB keyboard in combination with the transceiver in
RTTY mode without using any other device. You can also
connect an external device, such as a TNC or PC, and
operate the transceiver in RTTY mode.
PRECAUTION
◆ Prior to operation in RTTY mode, you must adjust the carrier level
by observing of the ALC meter.
OPENING THE RTTY ENCODE/DECODE SCREEN
[F1]~[F7] [FM/AM/FM-N]
[ESC] [FSK/PSK/REV]
1 Press [FSK/ PSK/ REV] to enter RTTY (FSK) mode.
2 Press [DECODER] (F3) to open the RTTY Encode/
Decode screen.
Pressing [XY LEV.] (F7) changes the refreshing frequency of
the Lissajous curve. Changing the refreshing frequency also
change the density of the Lissajous curve.
MAIN SCREEN
SUB-SCREEN
3 Press [ESC] to exit.
Note:
◆ If a value other than “170 [Hz]” is selected in Menu 2-06,
"FSK Spacing", the RTTY Encode/Decode screen does not
open. {page 5-46}
◆ Noise Reduction 1, Noise Reduction 2, Beat Cancel 1, Beat Cancel
2, Audio Peak Filter and the RX DSP equalizer do not function for
RTTY message decoding.
The RTTY Encode/Decode screen has the following
layout.
TX and RX Transcript Status Bar FFT Scope
Text String Buffer Waterfall Threshold Level
• Status bar: The band name and encode or decode in
use appear on the left side and the status (overwriting or
insertion) of the text string entry at the time of pressing
[Insert] on the USB keyboard appears on the right.
• Contents of transmission or reception: The text string
transmitted or received appears. Press and hold [(CLEAR)]
(F4) to delete the text string.
• Buffer of TX text string: The text string to be transmitted
appears. Pressing [PAUSE] pauses the reception.
• FFT scope: The audio FFT scope is used to check the tuning
state visually.
• Waterfall: The spectrum of the receive audio signal is displayed.
• Threshold: Displays the threshold level of the receive signal.
OPERATIONS ON THE RTTY ENCODE/DECODE
SCREEN
You can operate the transceiver using the following
procedure while the RTTY Encode/Decode screen is open.
• Pressing the [Page Up] or [Page Down] key on the USB
keyboard scrolls the contents of transmission and reception.
• Press [EXTEND] (F7) extends the RTTY Encode/Decode
screen; it expands vertically.
• The analog meter, if displayed on the main band, changes to
the digital meter.
• If you press the key again, the display of the RTTY Encode/
Decode screen and meter reverts to the previous display.
TX and RX Transcript Status Bar FFT Scope
Text String Buffer Waterfall Threshold Level
• Pressing [PAUSE] (F3) pauses the text displayed in the
RTTY Encode/Decode screen. Pressing the key again
releases the pausing of the text.
• The text received while pausing is not processed.
• Pressing and holding [(CLEAR)] (F4) clears the text
displayed in the TX text string.
• Pressing [MORE] (F1) alternates the function key guide to
another one.