Kenwood TS-890S Operation Manual - Page 80

Press F6 [AFC] to select AFC & NET.

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5 COMMUNICATING AIDS FFT Scope/Vectorscope Display Setting The tuning scope displayed on the PSK communication screen can be switched to an "FFT scope" or "vectorscope" display. Configure in Menu [2-13] "PSK Tuning Scope" Setting Value FFT Scope (default)/ Vector Scope • The display toggles between the "FFT scope" and "Vector Scope" each time the scope display on the screen is touched. FFT Scope Waveform Averaging The waveform displayed on the FFT scope can be averaged. Averaging of the waveform reduces random noise and makes observation of the target signal easier. Configure in Menu [2-10] "FFT Scope Averaging (PSK Decode)" Setting Value 0 (default) to 9 (1 step) (minimum to maximum averaging) AFC (Automatic Frequency Control) The AFC (Automatic Frequency Control) function can be used to tune the PSK signal that is being received. Press F6 [AFC] to set the AFC function to "On". • Pressing F6 [AFC] each time toggles the option in the following sequence: "OFF" → "AFC ON" →" AFC&NET ON" → "OFF". • When the AFC function is ON, the > display lights up. The amount of frequency correction made by the AFC function is displayed below "AFC". • Pressing and holding F6[AFC] while the AFC function is ON increases or decreases the displayed frequency which indicates the amount of correction made by the AFC function. Selecting a Waterfall Display Type Configure in Menu [2-17] "Waterfall when Tuning (RTTY/PSK Audio Scope)" Setting Value Straight (default)/ Follow Straight: Uses a straight line to show transition in the level of the target signal displayed on the waterfall when the RX frequency is altered. Follow: Tracks and displays the latest FFT scope level at the portion where the waterfall starts flowing when the RX frequency is altered. Vectorscope Turn the Tuning control to perform tuning such that the emission lines displayed on the vectorscope radiate from the center into the same direction. Configuring the AFC Tuning Range Configure the frequency range for tuning the PSK signals that are received using the AFC function. Configure in Menu [2-11] "PSK AFC Tuning Range" Setting Value ±8/ ±15 (default) [Hz] NET The NET function transmits signals by applying the frequency that is automatically tuned by AFC. Press F6 [AFC] to select "AFC & NET". • Pressing F6 [AFC] each time toggles the option in the following sequence: "OFF" → "AFC function ON" →" AFC function & NET function ON" → "OFF and > light up. .. . In Tune (BPSK) In Tune (QPSK) Idle Signal of BPSK or QPSK Unmodulated Carrier Signal ● Make use of the fine-tuning function if there is difficulty in performing tuning. ● While transmission is in progress, the vectorscope does not function and points to the 12 o'clock direction. Switching between BPSK and QPSK The PSK mode is further divided into 2 sub-modes, namely BPSK and QPSK. BPSK is the more commonly used mode. QPSK excels at correcting errors and boasts a higher decoding rate than BPSK. Press F2 [B/QPSK]. Pressing the key each time toggles the mode between BPSK and QPSK. The display to the right of the status bar toggles between > and > when the mode is switched. ● This is fixed at BPSK when the PSK63 mode is selected. 5-24

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FFT Scope/Vectorscope Display Setting
The tuning scope displayed on the PSK communication screen
can be switched to an “FFT scope” or “vectorscope” display.
Configure in Menu [2-13]
“
PSK Tuning Scope
”
Setting Value
FFT Scope (default)/ Vector Scope
•
The display toggles between the “FFT scope” and “Vector
Scope” each time the scope display on the screen is touched.
FFT Scope Waveform Averaging
The waveform displayed on the FFT scope can be averaged.
Averaging of the waveform reduces random noise and makes
observation of the target signal easier.
Configure in Menu [2-10]
“
FFT Scope Averaging
(PSK Decode)
”
Setting Value
0 (default) to 9 (1 step) (minimum to maximum
averaging)
Selecting a Waterfall Display Type
Configure in Menu [2-17]
“
Waterfall when Tuning
(RTTY/PSK Audio Scope)
”
Setting Value
Straight (default)/ Follow
Straight:
Uses a straight line to show transition in the level of
the target signal displayed on the waterfall when the RX
frequency is altered.
Follow:
Tracks and displays the latest FFT scope level at the
portion where the waterfall starts flowing when the RX
frequency is altered.
Vectorscope
Turn the
Tuning
control to perform tuning such that the emission
lines displayed on the vectorscope radiate from the center into the
same direction.
Unmodulated Carrier Signal
Idle Signal of BPSK or QPSK
In Tune (QPSK)
In Tune (BPSK)
●
Make use of the fine-tuning function if there is difficulty
in performing tuning.
●
While transmission is in progress, the vectorscope does
not function and points to the 12 o’clock direction.
AFC (Automatic Frequency Control)
The AFC (Automatic Frequency Control) function can be used to
tune the PSK signal that is being received.
Press F6 [AFC] to set the AFC function to “On”.
•
Pressing
F6 [AFC]
each time toggles the option in the
following sequence: “OFF” → “AFC ON” →“ AFC&NET ON”
→ “OFF”.
•
When the AFC function is ON, the <<
>> display lights
up. The amount of frequency correction made by the AFC
function is displayed below “AFC”.
•
Pressing and holding
F6[AFC]
while the AFC function is ON
increases or decreases the displayed frequency which
indicates the amount of correction made by the AFC
function.
Configuring the AFC Tuning Range
Configure the frequency range for tuning the PSK signals that are
received using the AFC function.
Configure in Menu [2-11]
“
PSK AFC Tuning Range
”
Setting Value
±8/ ±15 (default) [Hz]
NET
The NET function transmits signals by applying the frequency that
is automatically tuned by AFC.
Press F6 [AFC] to select “AFC & NET”.
•
Pressing
F6 [AFC]
each time toggles the option in the
following sequence: “OFF” → “AFC function ON” →“ AFC
function & NET function ON” → “OFF”.
•
<<
>> and <<
>> light up.
Switching between BPSK and QPSK
The PSK mode is further divided into 2 sub-modes, namely BPSK
and QPSK. BPSK is the more commonly used mode. QPSK excels
at correcting errors and boasts a higher decoding rate than BPSK.
Press F2 [B/QPSK].
Pressing the key each time toggles the mode between BPSK
and QPSK. The display to the right of the status bar toggles
between <<
>> and <<
>> when the mode is
switched.
●
This is fixed at BPSK when the PSK63 mode is selected.
5 COMMUNICATING AIDS
5-24