Kenwood TH-415A - Manual (Page 6)

CONTROLS ANO FUNCTIONS
©Antenna connector
This jack is used to connect the supplied antenna.
Twist to lock with the BNC connector.
(D DC IN terminal
This terminal is used for an external power supply. Input
voltage is 13.8 VDC 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.
| i
ir> to
As a precaution, do rxit remove the
battery pack when an external power
supply is used. Use the KENWOOD
PG-2V (supplied with the U.S.A ver­
sion) or PG-3D optional cable for the
connection.
(D 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 kfl and the DC voltage on this ter­
minal is 4 V.
®SP jack
This jack is used for an earphone or external speaker. The
recommended impedance is 8 fi nominal.
©TONE switch
U.S. version: This switch is used to activate the
sub-audible tone encoder.
® (D
European version: This switch is used to transmit a
TONE signal. When the switch is
pressed the repeater control signal
of 1750 Hz is activated.
® HI ( i )/LOW ( - jswitch
This switch is used to select the transmit output power.
(7) 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. (TH-41 5A/31 5A/21 5A)
® VOL control
Volume control with power ON/OFF switch.