Operating Features - Kenwood TKR-740 Service Manual

TKR-740
1. Front Panel
q q q q q
Speaker
w w w w w
REF (reference) indicator
Lights red when using an external reference
oscillator. Lights green when using the internal
oscillator.
e e e e e
BUSY indicator
Lights green when receiving. Flashes when
receiving data from the KPG-47D or when the
receiver PLL is unlocked.
r r r r r
TX (transmit) indicator
Lights red when transmitting. Flashes when
transmitting data to the KPG-47D (during
programming) or when the transmit PLL is
unlocked.
t t t t t
POWER indicator
Lights green when DC power is applied to the
TKR-740.
y y y y y
Display
Two 7-segment digits display the channel
number or status.
2. Rear Panel
w w w w w e e e e e
q q q q q
q q q q q
RX IN jack
Connect an RX antenna or a duplexer to this
BNC receptacle.
w w w w w
TEST/ SPKR jack
Test input/output jack. Connect an external
speaker to this jack.
e e e e e
REM T I/ O jack
Connect an external remote controller to this
jack.
r r r r r
CONTROL I/ O jack
Connect an external programming device or an
external repeater controller to this
DB-25 interface port.
4

OPERATING FEATURES

q q q q q
r r r r r t t t t t y y y y y u u u u u
w w w w w e e e e e t t t t t
r r r r r y y y y y
u u u u u
Programmable Function keys
Press these keys to activate their
programmable functions.
PF 1 Key Default: CH (CH UP)
PF 2 Key Default: MON (MONITOR ON/OFF)
PF 3 Key Default: TAKE OVER (TAKE OVER ON/OFF)
PF 4 Key Default: INTERCOM (INTERCOM ON/OFF)
PF 5 Key Default: TX DISABLE (TX Disable/Enable)
PF 6 Key Default: RPT DISABLE (Repeat Disable/Enable)
i i i i i
TEST sw itch
Press to transmit an unmodulated signal with
no local microphone connected. If an external
modulation signal source is connected to the
CONTROL I/ O jack, the RF signal is modulated
with this signal source.
o o o o o
VOLUM E control
Turn clockwise until a click sounds, to unmute
the volume. Rotate to adjust the volume. Turn
counterclockwise fully to mute the volume.
!0 !0 !0 !0 !0 M ICROPHONE jack
Connect a microphone to 8-pin modular jack.
i i i i i
t t t t t
EXT REF IN jack
Connect a high-stability external frequency
reference oscillator (10MHz, -10dBm or higher)
to this BNC receptacle (optional).
y y y y y
DC 13.2V jack
Connect a 13.2 V DC power supply to this jack.
u u u u u
FUSE
Insert a 10 A blade fuse into this fuse holder.
i i i i i
TX OUT jack
Connect a TX antenna or a duplexer to this
BNC receptacle.
u u u u u i i i i i o o o o o !0 !0 !0 !0 !0
PF1 PF2 PF3
PF4 PF5 PF6