User's Manual

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Getting started | RS90 Operating Manual
Adjusting squelch
The squelch adjustment allows you to adjust the sensitivity of
the radio so that background noise is minimized. In areas of high
static noise, such as close to large cities, you can improve quality of
reception by adjusting the squelch.
• Use the ◄ and ►keys to adjust the level up or down respectively.
• Adjust the level until the background noise just disappears.
¼ Note: You can also adjust the sensitivity of the VHF receiver. See
“Radio sensitivity” on page 94.
Setting transmission power
The RS90 has two transmission power settings:
High 25 W
Low 1 W
To change the power setting:
Press and hold [H/L] until the Hi or Lo icon on the display changes.
¼ Notes
• Channel 16 always remains in high transmission power.
• Some channels allow only low-power transmissions. If you try to
change to high power, the RS90 will sound an error beep.
• Some channels allow only low power transmissions initially, but can
be changed to high power by holding down [H/L] and PTT at the
same time.
• See “Appendix 11 - US and ROW VHF marine channel charts” on
page 111 for a list of channel data.
Draft v5.0
27 Feb 2014