Tone Squelch Operation - Icom IC-7850 Instruction Manual

■ Tone squelch operation

The tone squelch opens only when you receive a sig-
nal containing a matching subaudible tone in the FM
mode.
You can silently wait for calls from others using the
same tone.
When you transmit, the tone frequency is superim-
posed on your own signal.
Push a band key to select a desired band.
q
Push the Mode key [AM/FM] to select the FM
w
mode.
• "FM" is displayed.
Push the Multi-function [TONE](
e
the Tone Squelch function.
• "TSQL" is displayed.
• Pushing the Multi-function [TONE]() key toggles the
tone setting between "TONE," "TSQL," and OFF.
Hold down the Multi-function [TONE](
r
second.
• The Tone frequency screen is displayed.
Push [ p](F) or [q](F) to select the "T-SQL TONE"
t
item.
Rotate [MAIN DIAL] to select the desired tone
y
squelch frequency.
• The selectable tone frequencies are listed below.
• Hold down [DEF](F) for 1 second to select the default
setting.
• Pushing [T-SCAN](F) toggles the Tone Scan function
ON and OFF. (p. 12-10)
Push the Multi-function [TONE](
u
• Exits the Tone frequency screen.
• When the received signal includes a matching tone,
squelch opens and the signal can be heard.
Operate in the normal way.
i
• When you transmit, the tone frequency is superimposed
on your signal.
• Selectable tone frequencies
67.0 085.4 107.2 136.5
69.3 088.5 110.9 141.3
71.9 091.5 114.8 146.2
74.4 094.8 118.8 151.4
77.0 097.4 123.0 156.7
79.7 100.0 127.3 159.8
82.5 103.5 131.8 162.2
) key to turn ON
) key for 1
) key.
(unit: Hz)
165.5 186.2 210.7 254.1
167.9 189.9 218.1
171.3 192.8 225.7
173.8 196.6 229.1
177.3 199.5 233.6
179.9 203.5 241.8
183.5 206.5 250.3
() Multi-function keys
(F) Function keys
• Tone squelch function ON
• Tone frequency screen
5-39
RECEIVE AND TRANSMIT
Mode keys [MAIN DIAL]
5