Icom IC-7850 Instruction Manual - Page 120

Operating the Spectrum scope

Page 120 highlights

Previous view 6 SCOPE OPERATION DDOperating the Spectrum scope  The Multi-function screens are OFF: qqPush [SCOPE](F). • The Spectrum scope screen is displayed. Function Action Selects the Function menu. When the Center mode is selected, selects the scope span. SPAN • Selectable spans: ±2.5, 5.0, 10, 25, 50, 100, 250 and 500 kHz • H old down for 1 sec­ond to select the ±2.5 kHz span. EDGE When the Fixed mode is selected, selects the Edge frequencies. • Upper and lower edge frequencies can be set in the Scope set screen. Push ATT Selects the Scope attenuator. • OFF, 10 dB, 20 dB, 30dB Hold down Turns OFF the attenuator. Push HOLD Selects the Hold function ON or OFF. Hold down Clears the Peak hold level. CENT/FIX Selects the Center or Fixed mode. M/S DUAL Push Selects the Main or Sub band. Hold down Selects scope. the Dual or Single EXPD/ SET Push Selects the Expanded or Normal screen. Hold down Enters the Scope set screen. Displays the Reference level window. REF (p. 6-8) • Push again to close the window. • Rotate [MAIN DIAL] to adjust the Refer- ence level. Selects the sweep speed. SPEED or "" displays FAST, MID, or SLOW. MARKER Selects the Marker. • The Spectrum scope with Sub band selection is enabled only when the Dualwatch or Split frequency operation. wwTo exit the Spectrum scope screen, push [EXIT/ SET]. (F) Function keys [EXIT/SET] • Spectrum scope screen • Function menu (MENU2) • Fixed mode screen (Dual scope) NOTE: If a strong signal is received, a ghost waveform may appear. If it appears, push [ATT](F) several times to enable the Scope attenuator. 6-3

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6-3
6
SCOPE OPERATION
D
Operating the Spectrum scope
The Multi-function screens are OFF:
Push [SCOPE](F).
q
• The Spectrum scope screen is displayed.
Function
Action
<MENU1>
<MENU2>
Selects the Function menu.
SPAN
When the Center mode is selected, selects
the scope span.
• Selectable spans: ±2.5, 5.0, 10, 25, 50,
100, 250 and 500 kHz
• Hold down for 1 second to select the ±2.5
kHz span.
EDGE
When the Fixed mode is selected, selects
the Edge frequencies.
• Upper and lower edge frequencies can be
set in the Scope set screen.
ATT
Push
Selects the Scope attenuator.
• OFF, 10 dB, 20 dB, 30dB
Hold down
Turns OFF the attenuator.
HOLD
Push
Selects the Hold function ON or
OFF.
Hold down
Clears the Peak hold level.
CENT/FIX
Selects the Center or Fixed mode.
M/S
DUAL
Push
Selects the Main or Sub band.
Hold down
Selects the Dual or Single
scope.
EXPD/
SET
Push
Selects the Expanded or Nor-
mal screen.
Hold down
Enters the Scope set screen.
REF
Displays the Reference level window.
(p. 6-8)
• Push again to close the window.
• Rotate [MAIN DIAL] to adjust the
Refer-
ence
level.
SPEED
Selects the sweep speed.
• “

,” “

,” or “
” displays FAST, MID, or
SLOW.
MARKER
Selects the Marker.
• The Spectrum scope with Sub band selection is
enabled only when the Dualwatch or Split frequen-
cy operation.
To exit the Spectrum scope screen, push [EXIT/
w
SET].
• Spectrum scope screen
• Function menu (MENU2)
• Fixed mode screen (Dual scope)
(F) Function keys
[EXIT/SET]
NOTE:
If a strong signal is received, a ghost wave-
form may appear. If it appears, push [ATT](F) several
times to enable the Scope attenuator.