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)
