Kenwood TS-990S Operation Manual - Page 136

Waterfall, Vector Scope (sub-screen), Fsk/ Psk/ Rev], Decode], Psk Encode, S.disp/ Sel]

Page 136 highlights

5 ASSISTING YOUR SMOOTH QSO WATERFALL The Waterfall screen uses spectrum linking with the audio FFT scope and displays the transition of frequency components contained in the received audio signal. Tuned Correctly (BPSK Mode) VECTOR SCOPE (SUB-SCREEN) The vector scope displays how the received PSK signal is tuned. This allows you to tune the signal from the station you are in QSO with by observing their waveform on the vector scope. Follow the procedure below to open the vector scope. 1 Press [FSK/ PSK/ REV] to enter PSK mode. 2 Press [DECODE] (F3) to open the PSK Encode/ Decode screen. 3 Press [S.DISP/ SEL] to display the vector scope. Tuned Correctly (QPSK Mode) BPSK and QPSK "idle" Signal The sub-screen cycles as follows: Vector scope > Main band frequency and dial > Main band frequency and sub band frequency > Vector scope 4 Rotate the Tuning control to tune the signal until the traces displayed on the vector scope will be radiate in the correct directions from the center. Non-modulated Carrier Signal Note: ◆◆If the PSK Encode/Decode screen is open on the main screen, the Vector Scope screen opens by pressing [S.DISP/SEL]. ◆◆Use Fine Tuning if it is not easy to tune. {page 4-14} 5-56 Index Contents

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5-56
5
ASSISTING YOUR SMOOTH QSO
Index
Contents
WATERFALL
The
Waterfall
screen uses spectrum linking with the
audio FFT scope and displays the transition of frequency
components contained in the received audio signal.
VECTOR SCOPE ±SUB-SCREEN²
The vector scope displays how the received PSK signal is
tuned. This allows you to tune the signal from the station
you are in QSO with by observing their waveform on the
vector scope.
Follow the procedure below to open the vector scope.
1
Press
[FSK/ PSK/ REV]
to enter PSK mode.
2
Press
[DECODE]
(F3) to open the
PSK Encode/
Decode
screen.
3
Press
[S.DISP/ SEL]
to display the vector scope.
The sub-screen cycles as follows: Vector scope > Main band
frequency and dial > Main band frequency and sub band
frequency > Vector scope
4
Rotate the
Tuning
control to tune the signal until the
traces displayed on the vector scope will be radiate in
the correct directions from the center.
Tuned Correctly (BPSK Mode)
Tuned Correctly (QPSK Mode)
BPSK and QPSK “idle” Signal
Non-modulated Carrier Signal
Note:
If the
PSK Encode/Decode
screen is open on the main screen,
the
Vector Scope
screen opens by pressing
[S.DISP/SEL]
.
Use Fine Tuning if it is not easy to tune.
{page 4-14}