1-5
1. ADVANCED OPERATIONS
Key
Action
<1>
<2>
Selects the Function menus.
HOLD
Turns the Hold function ON or OFF.
• “
HOLD
” is displayed, and the RTTY
DECODE screen stops.
CLR
Clears the displayed characters.
• While the Hold function is ON, this
clears the characters and cancels the
Hold function.
TX MEM
Opens the RTTY MEMORY screen.
• Sending the RTTY MEMORY RT1 ~ RT8.
LOG
Displays the RTTY DECODE LOG screen.
•
Starts/Stops logging, selects the file
type or the time stamp.
LOG
VIEW
Displays the RTTY DECODE LOG VIEW
screen.
•
You can check the saved RTTY log files.
ADJ
Opens the THRESHOLD screen.
You can adjust the threshold level.
EXPD/
SET
Touch
Selects the Expanded or
Normal screen.
Touch
1 second
Displays the RTTY DECODE
SET screen.
Operating RTTY
(FSK)
The IC-9700 has a built-in RTTY decoder and
encoder. Using contents set in the RTTY TX memory,
you can do basic RTTY operations without using an
external device or software.
D
Displaying the RTTY DECODE screen
With the built-in demodulator and decoder, received
RTTY signals are displayed on the RTTY DECODE
screen.
MENU
»
DECODE
D
Twin Peak Filter (TPF)
The Twin Peak Filter (TPF) changes the audio
frequency response by boosting the mark and space
frequencies for better reception of RTTY signals, or
for decoding the AF output signal on a PC.
1. Push
MULTI
to display the Multi-function menu.
2. Touch [TPF].
L
Touching [TPF] turns the Twin Peak Filter function
ON or OFF.
3. Push
MULTI
to close the Multi-function menu.
NOTE
: When you are using the Twin Peak Filter, the
received audio output may increase. This is not a
malfunction.
D
RTTY decoding
Rotate
MAIN DIAL
to tune a signal.
Information
L
• Aim for a symmetrical wave form, and be sure the peak
points align with the mark (2125 Hz) and shift (170 Hz)
frequency lines in the FFT scope.
•
Tune to where both “◄” and “►” are displayed in the
tuning indicator.
• The S-meter displays the received signal strength,
when a signal is received.
• If you are receiving an RTTY signal but cannot decode
correctly, try in the RTTY-R (reverse) mode.
BFO
BFO
170 Hz
2125 Hz
170 Hz
2125 Hz
RTTY mode Normal
RTTY-R mode
Space
Mark
Space
Mark
TIP
: If you cannot receive, change the settings for
“RTTY Mark Frequency” and “RTTY Shift Width.”
MENU
» SET > Function >
RTTY Mark Frequency
MENU
» SET > Function >
RTTY Shift Width
( Displayed
frequency)
( Displayed
frequency)
RTTY DECODE screen
Transmitting
Decoded or transmitting characters
Tuning indicator
Waterfall display
FFT scope
Selected band (MAIN)