Icom IC-R9500, Инструкция по эксплуатации

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5-2
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Spectrum scope screen
This DSP-based spectrum scope allows you to display
the conditions on the selected band, as well as relative
strengths of signals. The IC-R9500 has two modes for
the spectrum indication— one is center mode, and an-
ther one is fixed mode.
In addition, the IC-R9500 has a mini-scope screen to
save screen space.
D 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 [F-1•SCOPE] to select the scope screen.
• The spectrum scope shows the peak level holding func-
tion. Peak levels are displayed in the background of the
current spectrum in a different color until the receive fre-
quency changes. This can be deactivated and the wave-
form color can be set in scope set mode. (p. 5-7)
e
Push [F-6•CENT/FIX] to select the center mode.
• “ ” is displayed when center mode is selected.
r
Push [F-2•SPAN] once.
• Multifunction switch guide changes to the span setting
guide.
t
Push [SPAN+] or [SPAN–] several times to select
the scope span.
• ±2.5 k, ±5.0 k, ±10 k, ±25 k, ±50 k, ±100 k, ±250 k,
±500 k, ±1 M, ±2.5 M and ±5 MHz are available.
y
Push [F-3•BW/SPEED] once.
• Multifunction switch guide changes to the resolution
band width/speed setting guide.
u
Push [BW+] or [BW–] several times to select the
resolution band width.
• 0.2 k, 0.5 k, 1 k, 2 k, 5 k, 10 k and 20 kHz are available.
i
Push [SPEED–] or [SPEED+] several times to se-
lect the sweep speed.
o
Push [F-4•ATT] several times to activate an attenu-
ator or turn the attenuator OFF.
• 10, 20 and 30 dB attenuators are available.
!0
Push [F-5•HOLD] to freeze the current spectrum
waveform.
• “ ” appears while the function is in use.
• The peak hold function can be deactivated in scope set
mode.
!1
Push [EXIT/SET] to exit the scope screen.
NOTE: If a strong signal is received, a ghost wave-
form may appear. Push [F-4•ATT] several times to
activate the spectrum scope attenuator in this case.
Spurious signal waveforms may be displayed if gen-
erated in the internal scope circuit and do not indi-
cate a receiver malfunction.
HOLD
CENTER
[EXIT/SET] [F-5] [F-3]
[F-2]
[F-1]
[F-6]
[F-5] [F-3] [F-2] [F-1] [F-6] [F-4] [F-7]
SPAN BW/SPEED CENT/FIX PEAK
SET
MENU1 ATT HOLD
W-BPF MENU2
5
RECEIVE FUNCTIONS
• Observed indication example