Icom IC-RSOOCOL Instruction Manual page 49

(2) VOICE SCAN CONTROL (VSC)
FUNCTION
vse
(3) SCAN RESUME CONDITION
(4) TAPE RECORDER CONTROL
(5) SCANNING WITH THE SPECTRUM
SCOPE SCREEN
Tech Talk from Icom
Q: How does the IC-R9OO0L (Voice Scan Control)
differ from former VSCs?
A: The IC-R900OL detects audio components in receive
signals differently.
The IC-RSOOOL VSC detects both audio signal com-
ponents and a variation of the received audio tone.
Former VSCs detected only receive signals whether
they included audio signal components or not.
Therefore, older receivers equipped with former
VSCs do not resume scanning when they receive a
signal modulated with no variation of the audio
signal. Carrier waves with no audio signal or no
variation of audio signals are always unwanted
signals,
SCANNING Q
Scanning restarts a few seconds after stopping when a signal
not including audio or voice components is received.
e Turn ON the [VSC] switch to activate the VSC function.
Scanning does not resume while a signal is
received. Resumes approx. 3 seconds after
the signal disappears.
Resumes scanning several seconds* after
scanning stops. Scanning stops for several
seconds* even if the signal disappears.
Resumes scanning several seconds* after
scanning stops. Scanning resumes approx. 3
seconds after the signal disappears.
Cancels scanning when a signal is received.
*The [DELAY TIME] control adjusts delay time 3 ~ 20
seconds (until 30 sec, when the [REC SPEECH] switch is
turned ON).
When a signal is received, the |C-R9OOOL controls the tape
running of a tape recorder through the remote jack on both
the IC-R9OOOL and the tape recorder. You can record the
received signal even if you have left the receiver. See p. 27
for connection information.
Scanning can operate using the spectrum scope screen.
However, the scope screen is automatically in the "HOLD"
condition while scanning. The "HOLD" condition is
canceled when scanning stops.
The IC-R9OOOL, however, resumes scanning when it
receives unwanted signals such as those mentioned
above. The VSC turns ON because the IC-R9O00L
VSC detects variation of the audio signal.
The VSC starts to sample the received signal for one
second when the scan stops. If the received signal
includes audio signals and the tone of the audio
signals changes, the scan stops on the frequency.
The new VSC system is therefore very useful for
auto memory write scan or audio recording with a
tape recorder during scanning.
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