![background image](http://html1.mh-extra.com/html/icom/ic-7300-hf-plus/ic-7300-hf-plus_full-manual_4113602070.webp)
5
SCOPE OPERATION
5-5
D
Adjusting the Renerence 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 to see these signals.
• Even if this setting is changed, it does not affect the
scope input level.
• When you adjust the Reference level, the signal
strength for the waterfall also appears to change.
1. Open the SPECTRUM SCOPE screen.
MENU
»
SCOPE
2. Touch [<1>].
•The function menu changes to Menu 2.
3. Touch [REF].
• Opens the Reference level window.
L
Touch [REF] to open or close the window.
4. Rotate
MAIN DIAL
to adjust the level.
•Adjustable range: –20.0 dB ~ +20.0 dB
L
Touch [REF] for 1 second to select ±0.0 dB.
5. Touch [REF].
• Closes the Reference level window.
6. To exit the SPECTRUM SCOPE screen, push
EXIT
.
D
Sweep speed
Select the sweep speed to change the FFT scope
refresh speed and the waterfall speed.
L
To change only the waterfall speed, select “Slow,”
“Mid,” or “Fast” in the Scope set screen. (p. 5-7)
1. Open the SPECTRUM SCOPE screen.
MENU
»
SCOPE
2. Touch [<1>].
•The function menu changes to 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.
L
A popup window appears in the center of
SPECTRUM SCOPE screen and displays the
selected sweep speed for 1 second.
4. To exit the SPECTRUM SCOPE screen, push
EXIT
.
Spectrum scope screen (Continued)
Sweep speed (FAST)
Sweep speed (MID)
Sweep speed (SLOW)
“
”
“
”
“
”
Dinnerence spectrum (+20.0, ±0.0, –20.0 dB)
Reference level
(+20.0 dB)
Reference level
(–20.0 dB)
L
If 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.
–5.0k
SPECTRUM SCOPE
Grid 1k/10dB
+4
+3
+2
+1
0
–4
–3
–2
–1
+5.0k
HOLD
CENTER
R T
–5.0k
SPECTRUM SCOPE
Grid 1k/10dB
+4
+3
+2
+1
0
–4
–3
–2
–1
HOLD
CENTER
R T
±0.0 dB
+20.0 dB
–
20.0 dB
Previous view