Icom IC-R8600 Instruction Manual - Page 28

Adjusting the Reference level, Sweep speed, SCOPE OPERATION, SCOPE, Difference in spectrum display

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4 SCOPE OPERATION Spectrum scope screen (Continue) DDAdjusting the Reference level Adjusting the Reference level of the screen helps you to see a weak signal that is buried in the noise floor. ••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. Settable range: -20.0 dB ~ +20.0 dB 1. Open the SPECTRUM SCOPE screen. MENU » SCOPE 2. Touch []. ••The function menu changes to Menu 2. 3. Touch [REF]. LEach touch opens and closes the window. DDSweep speed Select the sweep speed to change the FFT scope refresh interval and the waterfall speed. LTo change only the waterfall speed, select "Slow," "Mid," or "Fast" on the Scope set screen. (p. 4-6) 1. Open the SPECTRUM SCOPE screen. MENU » SCOPE 2. Touch []. ••The function menu changes to Menu 2. 3. Touch [SPEED] several times to select FAST, MID and SLOW. LEach touch changes the speed. "" (MID), "" (SLOW) or FAST) 4. To exit the SPECTRUM SCOPE screen, push . 4. Rotate to adjust the level. LTouch [DEF] for 1 second to reset to ±0.0 dB. LTouch [REF] to return to Menu 2. 5. To exit the SPECTRUM SCOPE screen, push several times. Difference in spectrum display Reference level Reference level (+20.0 dB) (-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. 4-4

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4
SCOPE OPERATION
4-4
Spectrum scope screen (Continue)
D
Adjusting the Reference level
Adjusting the Reference level of the screen helps you
to see a weak signal that is buried in the noise floor.
• 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.
Settable range:
–20.0 dB ~ +20.0 dB
1.
Open the SPECTRUM SCOPE screen.
MENU
»
SCOPE
2. Touch [<1>].
• The function menu changes to Menu 2.
3. Touch [REF].
L
Each touch opens and closes the window.
4. Rotate
to adjust the level.
L
Touch [DEF] for 1 second to reset to ±0.0 dB.
L
Touch [REF] to return to Menu 2.
5.
To exit the SPECTRUM SCOPE screen, push
several times.
Difference in spectrum display
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.
±0.0 dB
+20.0 dB
–20.0 dB
D
Sweep speed
Select the sweep speed to change the FFT scope
refresh interval and the waterfall speed.
L
To change only the waterfall speed, select “Slow,” “Mid,”
or “Fast” on the Scope set screen. (p. 4-6)
1.
Open the SPECTRUM SCOPE screen.
MENU
»
SCOPE
2. Touch [<1>].
• The function menu changes to Menu 2.
3.
Touch [SPEED] several times to select
FAST, MID
and SLOW
.
L
Each touch changes the speed.
4.
To exit the SPECTRUM SCOPE screen, push
.
“

” (MID), “
” (SLOW) or “

” (FAST)