![background image](http://html.mh-extra.com/html/icom/ic-7851/ic-7851_instruction-manual_612355120.webp)
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 sec ond 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.