Icom IC-7850 Instruction Manual - Page 120
Operating the Spectrum scope
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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