27
VR-120D O
PERATING
M
ANUAL
Channel Counter
The Channel Counter allows measuring of the frequency of a nearby transmitter, without
knowing that frequency in advance. The frequency can be measured by bringing the
VR-
120D
close to the transceiver which is transmitting.
The
VR-120D
performs a high-speed search within a ±50 MHz range from the frequency
displayed on the LCD. When the strongest signal in that range is identified, the
VR-120D
displays the frequency of that (strongest) signal, and writes it into the special "channel
counter memory.
Note:
This channel counter is designed to provide an indication of the operating fre-
quency of the incoming signal, one that is close enough to allow the user to tune
precisely to the other station's frequency. This feature is not, however, designed to
provide a precise determination of the other station's frequency.
1.
Set the radio to the VFO mode by pressing the [
V/M
] key.
2.
Bring
VR-120D
into close proximity to the transmitter to be measured.
3.
Press the [
MODE
] key for 2 seconds.
l
While searching, a "count-down" display will appear
(COUNT4 · · · COUNT1), and then the frequency of the
nearby station will be displayed after the search ends.
l
When the channel counter is active, the antenna circuit is detached. Therefore, only
stations in close proximity may have their frequencies measured using this feature.
l
When it isn't possible to determine the signal's frequency, "--NO--" will be dis-
played on the LCD, and the
VR-120D
will return to the VFO mode.
l
The search width of the Channel Counter can be changed via the Menu mode (item
#20).
l
When the incoming signal level from the other station is extraordinarily high, you
may need to increase the distance between the
VR-120D
and the other station, in
order to get correct indication of the frequency.
4.
Press the [
V/M
] key. The radio will exit from Channel Counter operation.
The memory of the Channel Counter is deleted each time a new search takes place.
