Kenwood TS-990S - Manual (Page 155)

7-1
7 BANDSCOPE
Index Contents
BANDSCOPE
The Bandscope displays the signal strength along the
vertical axis and the frequency along the horizontal
axis, allowing you to observe the status of the received
frequency.
There are two modes available: Center mode, which
places the receive frequency at the center of the horizontal
axis, and Fixed mode, where the lower limit frequency and
upper limit frequency for the displayed band are fixed.
[ESC] [F5] [SCP]
DISPLAYING THE BANDSCOPE
1 Press [SCP] to display the bandscope on the main
display.
Each time you press [SCP], the screen cycles through
Bandscope > Bandscope and Waterfall > No Bandscope
Display > Bandscope.
2 Press [ESC] to exit.
WATERFALL
Displaying the waterfall below the bandscope allows
you to observe the transition of the signal strength in
addition to the state of the received signal and its adjacent
frequencies.
In the waterfall display, the vertical axis represents
elapsed of time and the horizontal axis represents the
frequency.
The signal strength is distinguished by its color on the
display; white (strong), red to yellow (medium) and green
to blue (weak).
The spectrum of the signal strength for the range
equivalent to the four times of the red marker appears
vertically. The span until the next red marker appears (in
other words, waterfall fall speed) can be changed.
While the Waterfall is being displayed, the bandscope
height is reduced to one third compared to when only the
bandscope is displayed.
Note:
◆ In Center mode, the waterfall display pauses if the receive
frequency is changed.
◆ In Fixed mode, with the observation of the target signal (vertical
trace) displayed on the Waterfall, shift the marker position to tune
the signal.
ADJUSTING THE REFERENCE LEVEL
If it is not easy to distinguish the target signal from
the noise in the noisy environment or if you observe a
weak signal on a quiet band, the reference level for the
bandscope can be adjusted to allow you to distinguish the
target signal.
1 Press [REF.LEV] (F5) to display the current value of
the reference level at the center of the Bandscope
screen.
2 Observe the spectra of the bandscope waveform and
waterfall on the Bandscope screen, rotate the MULTI/
CH control to adjust the reference level in the range
from -20.0 dB to +20.0 dB.
3 Press [REF.LEV] (F5) to finish the adjustment for the
reference level.
Note:
◆ If the target signal cannot be distinguished due to the excessively
large input signal even after the reference level has been
adjusted, the attenuation level of the bandscope can be
changed. {page 7-8}