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VHF 100/200 Series Owner’s Manual 9
Basic Operation
When two signals are broadcast on the same frequency, a VHF radio only receives the
stronger of the two signals. Other than distress calls, transmit using the lowest power
setting that allows you to communicate. This reduces the possibility of your transmissions
interfering with the transmissions of disinterested parties.
In the USA frequency band, transmissions on Channels 13 and 67 are required to be low-
power (1 watt) by default. You can bypass this power setting by pressing the 25W soft key
during transmission.
To switch between LO and HI transmitting power:
1. Press the HI/LO key.
2. Select 1W or 25W to toggle between LO and HI transmit power modes.
TIP: The radio returns to the Home screen automatically two seconds after changing the
1 W/25 W mode. You can also select OK to return to the Home screen.
Adjusting the Local/Distant Receiving Sensitivity
You can control the receiving sensitivity of the radio. If you are experiencing noise in high-
trafc areas or areas with electromagnetic interference (caused by cell-phone towers, for
example), set the receiving sensitivity to Local to decrease the sensitivity of the receiver. In
remote areas and in open water, set the receiving sensitivity to Distant to ensure that you are
using the maximum range of the receiver.
The
LOCAL
icon is displayed on the screen when set to Local receiving sensitivity.
1. Press the HI/LO key.
2. Select LOCAL/DIST to toggle between local and distant modes.
Using the Intercom
Intercom operation only applies to the VHF 200 series radios and GHS 10 series handsets.
The intercom is part of the Public Address (PA) system of your radio. With an optional
GHS 10 or GHS 10i handset, you can use the radio and handset stations as an intercom
system for two-way communication. You can use the radio to initiate communication with a
handset station, and you can use a handset to initiate communication with the radio.
TIP: When the radio is in intercom mode, it does not receive trafc from your current channel.
Initiating an Intercom Call
1. Select PA > INTRCM.
2. Select a device from the list. Selecting ALL will transmit to every station. The other party
must press the PTT key on the receiving unit to accept the call.
3. Press and hold the PTT key and speak your message.