Scope Operation (Advanced); Spectrum Scope Screen; Dadjusting The Sweep Speed; Dadjusting The Reference Level - Icom IC-705 Advanced Manual

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SCOPE OPERATION (ADVANCED)

Spectrum Scope screen

DAdjusting the sweep speed

Select the sweep speed to change the FFT
scope refresh speed and the waterfall speed.
LTo change only the waterfall speed, select "Slow,"
"Mid," or "Fast" in the Waterfall Speed.
1. Display the SPECTRUM SCOPE screen.
» SCOPE
2. Touch [< 2 >] to display MENU 2.
3. Touch [SPEED] several times until the
desired sweep speed is selected.
• Selectable speeds: FAST, MID, or SLOW
L"," "," or "" indicates FAST, MID, or
SLOW.
LA popup window is displayed in the center of the
SPECTRUM SCOPE screen and displays the
selected sweep speed for 1 second.
"," "," or "" is displayed.

DAdjusting the Reference level

When monitoring a weak signal that is buried in
the noise floor, or monitoring a strong signal but
some stronger signals are nearby, adjusting the
Reference level of the screen helps you to see
these signals.
• Even if this setting is changed, it does not affect the
input signal level.
• When you adjust the Reference level, the signal
strength for the waterfall also appears to change.
LEach band memorizes the setting.
1. Display the SPECTRUM SCOPE screen.
» SCOPE
2. Touch [< 2 >] to display MENU 2.
3. Touch [REF].
4. Rotate
• Adjustable range: –20.0 dB ~ +20.0 dB
LYou can reset to ±0.0 dB by touching [DEF] for
1 second.
5. To close the REF Level window, touch [REF].
The difference in the spectrum
Reference level
(+20.0 dB)
+20.0 dB
±0.0 dB
–20.0 dB
LIf you adjust this setting to a positive level, all
signal levels appear stronger.
Or, if you adjust to a negative level, all signal
levels appear weaker.
3-1
to adjust the level.
(–20.0 dB)