JRC JHS-770S Instruction Manual page 150

Marine vhf radiotelephone
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Options operation
5. UP/DOWN arrow keys
These keys are used for the channel selection, or menu settings. Additionally, note that when selecting the
channel, the channel numbers are displayed as follows.
Case of pressing ▲ or ▼ key shortly and repeatedly:
- Example of ITU channels
- Example of Canada channels
*1) If left the ▲ or ▼ key on the channel, the digits of the channel start scrolling. For more details,
see 7.Display below.
Case of holding down ▲ or ▼ key:
*2)
While holding down, channel number is increasing at the same interval of time (0.5sec).
Additionally, if left the ▲ or ▼ key, the digits of the channel start scrolling as mentioned
above.
6. Waterproof connector cap
When using this unit, remove this cap and connect the handset to the internal connector.
10-6
(Note: USA mode is similar.)

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