Kenwood TS-990S, Instruction Manual

Page: 165 / 290

8-1
8 AUDIO SCOPE
Contents Index
DISPLAYING THE AUDIO SCOPE AND
OSCILLOSCOPE
This transceiver has an Audio Scope and oscilloscope,
coupled with waterfall capability, allowing you to observe
the status of an audio signal. Received and transmitted
audio can be displayed using the spectrum and
waveforms, to observe the communication quality and
status of the audio.
Displaying the waterfall below the Audio Scope allows you
to observe the transition of the signal strength in addition
to the state of the audio signal.
In the waterfall display, the vertical axis represents
elapsed time and the horizontal axis represents the
frequency. The signal strength distinguished by white
(strong), red to yellow (medium) and green to blue (weak)
is expressed on the display. The spectrum of the signal
strength for the last 9.3 seconds appears vertically. Every
5 seconds, a 2-mm (1/10") long red marker appears on
the left side of the waterfall display, showing the lapse of
time.
[F1]~[F7] [SCP]
1 Press [SCP] to display the Bandscope screen.
2 Press [RF/AF] (F1) to select either the Bandscope
screen or the Audio Scope screen.
• In the Audio Scope screen, the Audio Scope appears on
the left side and the oscilloscope appears on the right side.
• If [RF/AF] (F2) is unavailable in the key guide for function
keys, press [MORE] (F1) to alternate the key guide.
3 Press [ESC] to exit.
CHANGING THE AUDIO SOURCE FOR THE AUDIO
SCOPE
You can select from the received audio for the main band
and for the sub band.
1 Press [RF/AF] (F2) on the Bandscope screen to open
the Audio Scope screen.
If [RF/AF] (F2) is unavailable in the key guide for function
keys, press [MORE] (F1) to alternate the key guide.
2 Press [M/S] (F1) to toggle the selected band between
the main band and the sub band.
• Each key press cycles through Received audio in the main
band (Mmain band) > Received audio in the sub band (Sub
Band) > Received audio in the main band (Main Band).
• The name of the selected band appears. The main band
and sub band cannot be replaced while transmitting.
Note:
◆ You can observe the waveform of the transmitting signal while
transmitting.
CHANGING THE ATTENUATOR FOR THE AUDIO
SCOPE
If the signal level applied to the Audio Scope is
excessively high, attenuating the level will reduce the
amplitude of the waveform. This optimizes the display on
the Audio Scope facilitating you to observe the waveform.
1 Press [RF/AF] (F2) on the Bandscope screen to open
the Audio Scope screen.
If [RF/AF] (F2) is unavailable in the key guide for function
keys, press [MORE] (F1) to alternate the key guide.
2 Press [ATT] (F3) to select an attenuator.
• Each time you press [ATT] (F3), the level cycles as follows:
0 dB > 10 dB > 20 dB > 30 dB > 0 db. The attenuation level
appears on the upper left side of the grid. The default is "0
dB".
• Each long press of [ATT] (F4) cycles the attenuation level
in the reversed sequence.