12
OTHER FUNCTIONS
12-2
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 relative received signal strength
level�
The Band Scope function has 2 sweep types�
• Single Sweep:
Searches the specified
frequency range only once�
The Single Sweep starts from
the lower frequency and the
sweep stops after reaching to the
upper frequency�
• Continuous Sweep: Repeatedly searches the
specified frequency range.
The transceiver’s sweep bandwidth is ± 25 × the
tuning step number, centered on the operating
frequency�
L
The ± 25 times is a fixed value.
Example:
The operating frequency is 433�000 MHz and
the tuning step is set to 20 kHz� Therefore, the
sweep range is between 432�500 MHz (lower edge
frequency) and 433�500 MHz (higher edge frequency)�
The calculation is as follows:
Lower edge frequency = –25 × 20 kHz
= –500 kHz (–0�5 MHz)
Higher edge frequency = +25 × 20 kHz
= +500 kHz (+0�5 MHz)
The operating (center) frequency is 433�000 MHz
The lower (start) frequency is 432�500 MHz
(= 433�000 MHz – 0�5 MHz)
The higher (stop) frequency 433�500 MHz
(= 433�000 MHz + 0�5 MHz)
D
Sweep operation
Example:
Continuous sweeps centered on
433�000 MHz
1� Push [V/MHz] to enter the VFO mode�
2� Rotate [DIAL] to set 433�000 MHz�
3� Push [QUICK]�
4� Select “Band Scope�”
5� Select an option�
▼
•
Returns to the frequency display and starts the
continuous sweep�
6� Push [ENT]�
•
Stops the sweep�
L
Push [ENT] again, to resume the sweep for the
Continuous Sweep function�
7� When the sweeping stops, rotate [DIAL] to move
the sweep marker to a detected signal�
•
You can hear the signal audio�
L
While the sweep is paused, push [CLR] to turn OFF
the Band Scope function�
Band Scope function
Example:
A strong signal is received on
432�990 MHz�
(Tuning step: 5 kHz)
TIP:
•
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�
Therefore, 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 on how to set the tuning step�
•
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� (p� 11-43)
(MENU > Sounds >
Scope AF Output
)
Band Scope
display
Center frequency
(Example: 433.000 MHz)
Sweep marker
Strong level
Weak level
[ENT]
[Down]
[Up]
