Kenwood TH-55AT Series User Manual
Page 9
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MONITOR switch
When operating in the CTCSS (Tone Squelch) mode
you can use this key to determine if the frequency is in
use before transmitting. Pressing this key will disable
the CTCSS function as long as the key is held depress
ed.
Lamp switch
This switch is used to control the night lamp on the
LCD display. The lamp will turn itself OFF automatical
ly 5 seconds after the last key operation.
PTT (Push To Talk) switch
Press this switch whenever you wish to transmit.
Release button
Press this button up to
release the battery pack.
F. Lock key
This key will deactivate
all functions except the
Lamp, MONI, PTT func
tions.
(0) Speaker
® Microphone
® Battery case
@ SP jack
This jack is used to con
nect an external speaker
or earphone. The recom
mended impedance is
8 n.
MIC jack
This jack is used for con
nection of an external
microphone. The use of
an electret type micro
phone is recommended.
Input impedance is 2 kft and the DC voltage on this ter
minal is Approx. 4 V (MAX 3.5 mA).
Note:----------------------------------------------------------------------------------------
The use of a dynamic microphone is not recommended.
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