Controls And Functions - Kenwood TH-225A Instruction Manual

CONTROLS AND FUNCTIONS
@ Antenna connector
'This jack is used to connect the supplied antenna.
Twist to lock with the BNC connector.
(2) DC IN terminal
This terminal is used for an external power supply. Input
voltage is 13.8 VOC nominal. The center is the (+) side and
the sleeve is (—) side.
You should turn the power switch OFF when connecting
this terminal, Pay attention to the polarity.
Asa precaution, do not remove the bat-
i]s
@ MIC jack
This jack is used for connection of an external microphone.
The use of an electret type microphone is recommended.
Input impedance is 2 КЇ and the DC voltage on this terminal
isav.
(3) SP jack
This jack is used for an earphone or external speaker. The
recommended impedance is 8 0 nominal.
© TONE switch
This switch is used to activate the sub-audible tone encoder.
© нж YLOW ( ~ )switch
This switch is used to select the transmit output power.
© SQL control
The SQL control is used to eliminate noise during no signal
periods. Normally, this control is adjusted clockwise until
the noise just disappears and the BUSY indicator goes OFF
(Threshold level). For scan operation, this control must be
set to the threshold point. When an incoming signal is weak
or unstable, readjust the squelch for optimum reception.
For tone squelch operation with TSU-4, this control must
be set to the T.SQ position
(8) VOL control
Volume control with power ON/OFF switch.