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10
OTHER FUNCTIONS
10-4
Use the Band Scope function to visually search for
a specified frequency range around the displayed
frequency.
You can use this function to search for a signal, and
see the received signal strength level.
The Band Scope function has two sweep types,
Single sweep and Continuous sweep:
• A Single sweep searches the specified frequency
range only once.
• A Continuous sweep repeatedly searches the
specified frequency range.
The transceiver sweeps in “
±25 × Tuning step
”
steps
centered on the displayed frequency.
L
‘±25’ is fixed.
For example, if the display frequency is 146.010 MHz
and its tuning step is 20 kHz, the sweep range is
between 145.510 MHz (lower frequency) and 146.510
MHz (higher frequency). (146.010 MHz ±0.5 MHz)
See the calculation below.
+25 × 20 kHz = +500 kHz (0.5 MHz)
–
25 × 20 kHz =
–
500 kHz (
–
0.5 MHz)
Upper frequency: 146.510 MHz
(146.010 MHz +
0.5 MHz
)
Lower frequency: 145.510 MHz
(146.010 MHz –
0.5 MHz
)
D
Sweep operation
Example: Continuous sweeps centered on 146.010 MHz
1. Push [V/M] several times until you enter the VFO
mode.
2. Rotate [DIAL] to set 146.010 MHz.
3. Push [QUICK].
4. Rotate [DIAL] to select “Band Scope,” then push
[
ï
].
5. Select “Continuous Sweep,” then push [
ï
].
• Returns to the frequency display and starts continuous
sweeping.
6. Push [
ï
].
•Stops the continuous sweeping.
7. When the sweeping stops, rotate [DIAL] to move
the sweep marker to a detected signal.
L
You can hear the signal audio.
8. Push [QUICK].
9. Rotate [DIAL] to select “Band Scope,” then push
[
ï
].
10. Select “Scope OFF,” then push [
ï
].
•Turns OFF the Band Scope function.
TIP:
In the Band scope setting window, select
“Center Recall” to set the sweep marker to the
center frequency.
Band Scope function
Band Scope display
Center frequency
(Example: 146.010 MHz)
Sweep marker
The signal on 146.030 MHz
TIP:
•
The specified tuning step is used during a sweep.
If the tuning step is set too wide, the signals in the
sweep range may not be displayed (they may be
skipped), even if they are strong signals. Thus we
recommend that you set the tuning step to 20 kHz
or less to use the Band Scope function.
See Basic manual section 3 for details.
• You can hear the displayed frequency’s audio
during a sweep.
• You can turn OFF the audio output during a sweep
in the MENU screen.
(Sounds >
Scope AF Output
)
Example: A strong signal is received on 146.030 MHz.
(Tuning step: 5 kHz)
Strong level
Weak level
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