Scope - Yaesu FT-991 Operating Manual

c
onvenience
The SCOPE function provides a spectrum display of the band conditions. Both strong and weak signals can be clearly
displayed on the TFT screen. In the MANUAL mode, the scope frequency spectrum is scanned one time and displayed.
In the "Continuous Sweeping mode", the scope spectrum is repeatedly swept and displayed. When operating in the "ASC
(Automatic Spectrum-Scope Control) mode" the sweep is automatically carried out in conjunction with the movement
and operation of the main dial. The scope sweep and span may be optimized according to your preferences and purpos-
es.
Note: Since the FT-991 has only one receiver the audio will be muted while the spectrum scope is scanning.
Touch [ SWEEP ] on the LCD to display the band condi-
tions (spectrum).
 The transceiver is equipped with three types of
sweeping mode: "MANUAL mode", "Continuous
sweeping mode" and "ASC (Automatic Spectrum-
Scope Control) mode". Refer to the advice below to
select the optimal mode according to your prefer-
ences and purposes.
A :
dvice
 Width of scope display may be set in Menu item "120
SCP SPAN FREQ".
 The sweeping interval may be set in Menu item "118
SCP START CYCLE".
 "Spectrum display mode" or "Waterfall display
mode" may be selected in Menu item "117 SCP
DISPLAY MODE".
Page 40
f
eatures

Scope

Reception frequency Transmission frequency
Lights up when transmission frequency
is outside of the display range
Reception frequency: Green
Transmission frequency: Red
Width of scope
Example of waterfall display
FT-991 O
peraTing
M
anual