Icom IC-M601 Instruction Manual page 45

D D Internal speaker
When an external speaker is connected and the transceiver's
internal speaker is not required, the speaker on the trans-
ceiver and microphone can be deactivated.
--Set Mode--
Internal Speaker
˘ON
˘OFF
˘OFF
˘Position Request
˘Polling Request
˘<ENT˘OK>
D D LCD contrast
This item adjusts the contrast of the LCD in 8 steps.
--Set Mode--
Contrast
˘5
˘4
˘3
˘2
˘1
˘<ENT˘OK>
The optional HM-134 has it's own setting for the LCD con-
trast.
D D Automatic foghorn frequency
The audio frequency of the automatic foghorn can be ad-
justed to suit your preference. While this item is selected,
pushing [PTT] outputs the foghorn—experiment with the fre-
quencies available until you find one you like.
• Available frequency range is 200 Hz to 850Hz in 50 Hz step.
(Default: ON)
(Default: 5)
--Set Mode--
Foghorn Frequency
˘400
˘350
˘300
˘250
˘200
˘<ENT˘OK>
8
SET MODE
(Default: 400)
8
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