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Spectrum scope screen
This DSP-based spectrum scope allows you to dis-
play the frequency and relative signal strength of
received signals on the strengths of signals. The IC-
7600 has two modes for the spectrum display— one
is center mode, and the other is fixed mode.
In addition, the IC-7600 has a mini scope screen to
save screen space.
D Center mode
Displays signals around the set frequency within the
selected span. The set frequency is always displayed
at the center of the screen.
q Push [EXIT/SET] several times to close a multi-
function screen, if necessary.
w Push [SCOPE] (F-1) to select the scope screen.
e Push [CENT/FIX] (F-5) several times to select the
center mode.
” is displayed when center mode is selected.
r Push [SPAN] (F-1) several times to select the
scope span.
±2.5, ±5.0, ±10, ±25, ±50, ±100 and ±250 kHz are
available.
Push and hold [SPAN] (F-1) for 1 sec. to return to ±2.5
kHz span.
Sweep speed is selectable for each span indepen-
dently
in scope set mode. (pgs. 68, 69)
t Push [ATT] (F-2) several times to activate an
attenuator or turn the attenuator OFF.
10, 20 and 30 dB attenuators are available.
Push and hold [ATT] (F-2)
for 1 sec. to turn OFF the
attenuator.
y Push [MARKER] (F-3) several times to turn the
marker for transmit frequency and/or sub readout
frequency ON or OFF.
” displays the marker at the transmit frequency.
• “
” displays the marker at the sub readout frequency.
“<<” or “>>” appears when the marker is out of range.
The spectrum scope shows the transmit signal while
transmitting. This can be deactivated in scope set
mode. (p. 68)
The spectrum scope shows the peak level hold func
-
t
ion. Peak levels are displayed in the background of the
current spectrum in a different color. This can be deac-
t
ivated and the waveform color can be set in scope set
mode. (p. 68)
u Push [HOLD] (F-4) to freeze the current spectrum
display.
” appears while the function is in use.
Push and hold [HOLD] (F-4) to clear the current spec-
trum waveform.
i Push [EXIT/SET] to exit the scope screen.
NOTE: If a strong signal is received, a ghost signal
may also appear. Push [ATT] (F-2) several times
to activate the spectrum scope attenuator in this
case.
F-1 F-2 F-3
F-5
F-4
EXIT/SET
/
SCOPE
SPAN
ATT
MARKER
HOLD
CENT/FIX
Scope spurious signal example
Spurious signals may be received on the spectrum
scope screen regardless of the transceiver’s state
(TX or RX). They are generated in the scope circuit.
This does not indicate a transceiver malfunction.
Scope spurious example
65
4
RECEIVE AND TRANSMIT
Appears
72


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