Kenwood TS-990S Operation Manual - Page 130

Configuring The Rtty Shift Width, Reversing The Frequency In Rtty Mode

Page 130 highlights

5 ASSISTING YOUR SMOOTH QSO CONFIGURING THE RTTY SHIFT WIDTH The difference in frequency between the mark signal and the space signal is called shift width. You can configure the shift width for communication in RTTY mode. ReversING THE FREQUENCY IN RTTY MODE If the receive RTTY signal is reversed (the mark and shift signal frequencies are reversed), the RTTY signal cannot be decoded properly. In that case, press and hold [FSK/ PSK/REV] to reverse the RTTY signal so as to decode the reversed signal. w/PSNBM w3FWFSTF )[ )[ )[ )[ 1 Select Group No. 2, "Decoding & Encoding", from the Menu screen. 2 Access Menu 06, "FSK Spacing". 3 Press [SELECT] (F4) to allow editing of the parameter box. 4 Press [-] (F4) or [+] (F5) to select "170 [Hz]", "200 [Hz]", "425 [Hz]", or "850 [Hz]". The default is "170 [Hz]". 5 Press [ ] (F1). 6 Press [MENU] to exit. Note: ◆◆You cannot change the RTTY shift width while the RTTY Encode/ Decode screen is open. ◆◆To operate in RTTY mode using the built-in demodulator, encoder and decoder, configure "170 [Hz]" for Menu 2-06, "FSK Spacing". 4QBDF .BSL #'0 #'0 'SFRVFODZ 'SFRVFODZ ,FZJOH$IBSBDUFST KEYING POLARITY .BSL 4QBDF 'SFRVFODZ 'SFRVFODZ CONFIGURING THE POLARITY FOR ACC 2 KEYING If you use an external device for communication in RTTY (FSK) mode, connect its keying signal into pin 2 of the ACC 2 connector. You can configure the polarity for keying pin 2 (RTK) according to the specifications of the external device. If you configure "Off" for Menu 2-07, "FSK Keying Polarity", and short-circuit pin 2 (RTK) to the GND, the transceiver transmits the signal at the mark frequency configured for Menu 2-08, "FSK Tone Frequency". If "On" is configured for Menu 2-07, "FSK Keying Polarity", the space signal is transmitted and the space signal is shifted from the mark frequency by the shift frequency configured in Menu 2-06 "FSK Spacing". d

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5-50
5
ASSISTING YOUR SMOOTH QSO
Index
Contents
CONFIGURING THE RTTY SHIFT WIDTH
The difference in frequency between the mark signal and
the space signal is called shift width. You can configure the
shift width for communication in RTTY mode.
[F1]~[F7]
[MENU]
[MULTI/CH]
1
Select Group No. 2, "Decoding & Encoding", from the
Menu
screen.
2
Access Menu 06, "FSK Spacing".
3
Press
[SELECT]
(F4) to allow editing of the parameter
box.
4
Press
[-]
(F4) or
[+]
(F5) to select "170 [Hz]", "200
[Hz]", "425 [Hz]", or "850 [Hz]".
The default is "170 [Hz]".
5
Press
[
]
(F1).
6
Press
[MENU]
to exit.
Note:
You cannot change the RTTY shift width while the
RTTY Encode/
Decode
screen is open.
To operate in RTTY mode using the built-in demodulator, encoder
and decoder, configure “170 [Hz]” for Menu 2-06, “FSK Spacing”.
REVERSING THE FREQUENCY IN RTTY MODE
If the receive RTTY signal is reversed (the mark and shift
signal frequencies are reversed), the RTTY signal cannot
be decoded properly. In that case, press and hold
[FSK/
PSK/REV]
to reverse the RTTY signal so as to decode the
reversed signal.
Space
Frequency
Mark
Frequency
• Normal
• Reverse
170 Hz
2175 Hz
170 Hz
2175 Hz
BFO
Space
Frequency
Mark
Frequency
BFO
KEYING POLARITY
CONFIGURING THE POLARITY FOR ACC 2
KEYING
If you use an external device for communication in RTTY
(FSK) mode, connect its keying signal into pin 2 of the
ACC 2
connector. You can configure the polarity for keying
pin 2 (RTK) according to the specifications of the external
device.
If you configure “Off” for Menu 2-07, “FSK Keying Polarity”,
and short-circuit pin 2 (RTK) to the GND, the transceiver
transmits the signal at the mark frequency configured for
Menu 2-08, “FSK Tone Frequency”.
If “On” is configured for Menu 2-07, “FSK Keying Polarity”,
the space signal is transmitted and the space signal is
shifted from the mark frequency by the shift frequency
configured in Menu 2-06 “FSK Spacing”.
[F1]~[F7]
[FSK/PSK/REV]
[MENU]
[MULTI/CH]
1
Select Group No. 2, “Decoding & Encoding”, from the
Menu
screen.
2
Access Menu 07, “FSK Keying Polarity”.
3
Press
[SELECT]
(F4) to allow editing of the parameter box.