Kenwood TM-251A User manual

TM-251A/251E
TM-451A/451E
144, 430/440 MHz FM TRANSCEIVER
INSTRUCTION MANUAL
KENWOOD CORPORATION
@©PRINTED IN JAPAN B62-0455-08(K, P, E, M)
94/12 1110987654321 93/12

Notice to the user:
Gne or more of the following statements may be
applicable to this equipment.
FCC WARNING
This equipment generates or uses radio frequency energy.
Changes or modifications to this equipment may cause harmful
interference unless the modifications are expressly approved in
the instruction manual. The user could lose the authority to
operate this equipment if an unauthorized change or
modification is made.
INFORMATION TO THE DIGITAL DEVICE USER REQUIRED BY THE
FCC
This equipment has been tested and found to comply with the
limits for a Class B digital device, pursuant to Part 15 of the FCC
Rules. These limits are designed to provide reasonable
protection against harmful interference in a residential installation.
This equipment generates, uses and can generate radio
frequency energy and, if not installed and used in accordance
with the instructions, may cause harmful interference to radio
communications. However, there is no guarantee that the
-interference will not occur in a particular installation. If this
equipment does cause harmful interference to radio or television
reception, which can be determined by turning the equipment off
and on, the user is encouraged to try to correct the interference
by one or more of the following measures:
*® Reorient or relocate the receiving antenna.
@ increase the separation between the equipment and receiver.
® Connect the equipment to an outlet on a circuit different from
that to which the receiver is connected.
Consult the dealer for technical assistance.
Models Covered by this Manual
TM-251A: 144 MHz FM transceiver
(U.S.A./ Canada/ General)
TM-251E: 144 MHz FM transceiver
(Europe)
TM-451A: 440 MHz FM transceiver
(U.S.A./ Canada)
430 MHz FM transceiver
(General)
TM-451E: 430 MHz FM transceiver
(Europe)
Note:
> The TM-251 series is used for all illustrations and all LCD
example displays.
> Functions requiring the microphone keypad, such as Remote
Control, cannot be used without a keypad-equipped microphone.
This type of microphone is optional for some transceiver
versions.

THANK YOU
We are grateful you decided to purchase this KENWOOD
FM transceiver. The TM-251/TM-451 series of mobile
transceivers were developed to satisfy the requirement
for a compact rig that’s simple to operate yet has
superior performance. Users of this series will discover
the transceiver’s Menu Set-up method for feature
configuration recently incorporated in other KENWOOD
products.
KENWOOD believes that the compact size coupled with
the reasonable cost will guarantee your satisfaction with
this product.
PRECAUTIONS
Please
observe
the
following
precautions
to
prevent
fire,
personal
injury,
and
transceiver
damage:
e
Do
not
transmit
with
high
output
power
for
extended
periods.
The
transceiver
may
overheat.
e
Do
not
modify
this
transceiver
unless
instructed
by
this
manual
or
by
some
other
approved
KENWOOD
communication.
e
Do
not
expose
the
transceiver
to
long
periods
of
direct
sunlight
or
place
the
transceiver
close
to
heating
appliances.
e
Do
not
place
the
transceiver
in
excessively
dusty
or
humid
areas,
or
on
unstable
surfaces.
e
If
an
abnormal
odor
or
smoke
is
detected
coming
from
the
transceiver,
turn
OFF
the
power
immediately.
Contact
a
KENWOOD
service
station
or
your
dealer.
e
The
transceiver
is
designed
for
a
13.8
V
power
source.
Never
use
a
24
V
battery
to
power
the
i
transceiver.

CONTENTS
PANU FICS tami cern ee, peas tec amine misma pit eo ies 1
PO CES SORES cepceen cm seca inet arts aiee cadern te nas 1
CONVENTIONS FOLLOWED IN THIS MANUAL .. 2
PREPARATION FOR MOBILE OPERATION ....... 3
MOBILE INSTALLATION .. 3
Installation Example ................ 3
DC POWER CABLE CONNECTION oh oot
eplacing=FUSES Ty nro teen sess noe ences eden tte 6
ANTENNA CONNECTION .........................- 6
PREPARATION FOR FIXED STATION
OPERATION: 2.200 arts cepesaoutieeana stra sdigtes ene 7
DC POWER SUPPLY CONNECTION ............
Replacing. PuseSrc: vxcxins.cesiern acta weve sis 8
ANTENNA CONNECTION .......................... 8
ACCESSORY CONNECTIONS ....................... 9
EXTERNAL SPEAKER hi toel sci cce ae ce nean en 9
MICROPHONE oot 9
PACKET EQUIPMENT os c5sc9..pecs-vs mexecvas ears 9
Data Connector Pinout ........................... 10
YOUR FIRST QSO 11
GETTING ACQUAINTED 12
FRONT PANEL. 2 cccsccrsinaccsasteansersicnad bsamesats 12
REAR PANEL «ses. sn’ suesetedss copetarrenpscinrenece
MICROPHONE
Aa I a scxscaiak anni aciwateaceiutonsciwpcs
MENU SET-UP ........... ;
MENU DESCRIPTION .................0...5
MENU A ACCESS ooo. eeeeeees
MENU A CONFIGURATION ..
MENU B ACCESS .............
SWITCHING POWER ON/OFF
VOLUME ADJUST
SQUELCH ADJUST ..
Noise Squelch .......
S-Meter Squelch .......0..0.....0..0.0.ccceeeeeeee
SQUELCH HANG TIME
BAND SELECT
RIS MACKIE seca apes ease edenbatvastdnr vane
SELECTING FREQUENCIES .... “ies
TRING CORON ii ioc nest cccomitermana emncuenene

Programmable
VFO
=
sccussnteesd
ep
SN
33
OPERATING
THROUGH
REPEATERS
...........
Microphone
[UP]/[DWN]
Buttons
.
..
34
TRANSMIT
OFFSETS
|...
FREQUENCY
STEP’
SIZE
2
Oe
ee
35
Changes
in
Displayed
Frequencies
36
SELECTING
OFFSET
DIRECTION
.............
Hohe
e
AUTOMATIC
TRANSMIT
OFFSET
..............
TRANSMITTING
..............
37
U.S.A.
and
Canada
Versions
....
od
European
Versions
................00.00.0e.c000ee
ingle
re
aN
Bearers
ee
ae
wae
SELECTING
OFFSET VALUES
MANUALLY
_.
SELECTING
OUTPUT
POWER
......
37
REVERSE
FUNCTION
css
scue.
suessncostt
cues
sents
TIME-OUT
TIMER
(TOT)
...............
.
38
TONE
ACCESS
INHIBITING
TRANSMIT
............0.0.0...000202.
38
bet
eo
eee
ee
Selecting
a
Tone
Frequency
..
MEMORY
CHANNELS
.............0.00000.00.00000..
39
European
Versions
...............0..000..00cc
eee
AUTOPATCH
STORING
DATA
IN
MEMORY
.............2.-.-.
39
(U.S.A.
and
Canada
Versions)
...................
Simplex
Memory
Channels
.....................
39
Activating
the
Microphone
Keypad
.............
Split
Memory
Channels
....................0.....
40
DUAL
TONE
MULTI-FREQUENCY
RECALLING
MEMORY
CHANNELS
..
.
41
(DTMF)
MEMORY
......
o.oo.
o
ecco
ccccc
cece
eceee
Selecting
Channels
Sequentially
..
41
Making
DTMF
Calls
...000.
0.00.
Temporary
Frequency
Changes
..
41
Storing
DTMF
Numbers
...............
MEMORY
—>
VFO
TRANSFERS
..
42
Confirming
Stored
DTMF
Numbers
..
a
ERASING
MEMORY
CHANNELS
...
.
4
Transmitting
Stored
DTMF
Numbers
..........
CALTIGHANINEL:
is.
.asctvcasecesia
save
niowantashhing
43
SCAN
Recalling
Call
Channel
..........................
43
ar?)
aN
ibn
eka
ac
uate
Changing
Call
Channel
Contents
(Simplex)...
44
SCAN
RESUME
METHODS
......................
Changing
Call
Channel
Contents
(Split)
......
45
Time-Operated
Scan
...................
CHANNEL
DISPLAY
FUNCTION
..............
..,
45
Carrier-Operated
Sean
.......0............
INITIALIZING
MEMORY
......................002.
46
SELECTING
SCAN
RESUME
METHOD
mo
Partial
Reset
46
MEMGIRY
"SCAN
riot
ink
tore
ble
wec
satin
elutes
Full
ROS
Ob
ccc:
genes
rpms
apenig
care
tous
aneests
46
Locking-Out
Memory
Channels
................
BAND SCAN 22)2ecet el! Adee aisle

PROGRAMMABLE BAND SCAN ..............-. 59
Setting Scan Limits ................. 59
Using Programmable Band Scan 60
CALLIVFO SCAN: sess iiesves enecees eee apa4 Ol
GALTIMEMORY ‘SCAN, js. 42- ccjewanjess scoginseys » 61
AUXILIARY FUNCTIONS ..............02.0...50.55 62
TOGK. os ccseseaiedam sen nexetiae nese seg toetsabah sal sSyRre’ 62
WransGeiver Locks fac: Hin ncmsgr na Seek Ss 62
Micro phone-lotk tiiieesca ayes nuit ering oes eamaogmace, 62
AUTOMATIC POWER OFF (APO) .. snes, O83
BEER IONE. dc ties savor coos uct otusee caryy 64
DISPLAY DIMMER ...... ae 2 BA
DISPLAY, MODEsaset onside tat ath iae_65
DISPLAY DEMONSTRATION MODE ........... 66
REMOTE\CON TROL: .:.2 cease ressgeonraatian syed 67
REMOTE FUNCTIONS USING
MC-45DM/DME HOS e tiie. s.iod bt 68
Configuring the PF Keys .. 70
MGNitOr FUNCHON «22 --sccsns-ocscane snendted foensets 70
REMOTE FUNCTIONS USING TH-7 .... 71
KEYPAD DIRECT ENTRY ................. 71
Frequency Entry ....................0..255 Ely |
Memory Channel Entry .......................-55 73
CONTINUOUS TONE CODED SQUELCH SYSTEM
KG OSS) caceh ie tcec gh ae css I aha ong URS tal rE 74
SELECTING CTCSS FREQUENCIES .......... 74
(SING: SSS casi cerns Rare ane eeesceeedeepemennoee 74
DUAL TONE SQUELCH SYSTEM (DTSS) ....... 75
ACTIVATING DT SS: .... 0055.0 c2208k aan 75
STORING DTSS CODES .................::esees 76
DTSS AND REPEATERS .................00.0066 76
MESSAGE PLAYBACK CONTROL
MIA ESS: arte: inesacean ast nash cate tmeyiaarden uae ueneroy 77
Setting Message Playback DTSS Code 78
PAGE: jcc xanccaccugusivcins ach edd. Rome lin 79
LOAVES V1 (AG erick i tor Soe IN
PAGE CODE MEMORY ..
STORING PAGE CODES ...
CALEING, yes cce sari svruapicanes
RECEIVING .......... a
Receiving a Call with your ‘Station Code phen 82
Receiving a Call with a Group Code .......... 82
PAGE ANSWER-BACK ..................
PAGE CODE AND REPEATERS ....
LOCKINGOUT GOB ESS sic scams nsrcanernie ns pei
AUTO PAGE CANCEL oo. cccccens sve ssnaiwegain-a6
OPER RAGE ee vec sic suc sean ane
TONE ALE Ri ays 2iteed )Woruess.J.dee ena 86
ACTIVATING TONE ALERT .................0..65 86
CHANGING THE ALARM TONE ................ 87
MESSAGE RECORDING .. ..000.50. 002.0. desuahs ah 88
ACTIVATING THE RECORD FUNCTION ...... 88
SELECTING THE RECORDING TIME ......... 88
SELECTING THE RECORDING MODE ........ 89

FULL: DUPLEX OPERATION. | co: -cccurcccactecsueess 31
PAGKET OPERATION scassccscessvns cor svecennentens 93
ENABLING THE DATA CONNECTOR ......... 93
MAINTENANCE. 0 - ecuipsen gcbuinSodsg aaa seaauolesnien 94
GENERAL INFORMATION 94
SERVICE: Aces 2. «cvsewis orn cemase wo. 94
SERVICE NOTE . wean 95
COBANING notes 2s mane dutonuess 95
TROUBLESHOOTING .in.cescsycccesc cece densicelenee 96
OPTIONAL ACCESSORIES .............00.::000005 102
INSTALLING OPTIONS? «0.05, cos seicdcwesmasscvcenes 104
OPENING THE TRANSCEIVER ................ 104
INSTALLING THE TSU-8 CTCSS UNIT ...... 104
INSTALLING THE ME-1 EXPANSION
MEMORY UNIT crn ncsysccorsetnreueswens epseiemncane 105
SPECIFICATIONS: 0s .nenrecnecrsnosesied simacden sua 106
GEOSSARY as eascows ssancensecnonenimensiteres ween ails 108

FEATURES
e Dual band receive capability on each model in the
series:
TM-251AVE: 144 MHz plus 430/440 MHz
TM-451AVE: 430/440 MHz plus 144 MHz
e Full Duplex allows “telephone-style" contacts;
Transmit on the Main band with simultaneous Receive
on the Sub-band.
e Digital Record extends the convenience of CTCSS,
DTSS, Page, and Tone Alert by recording the audio of
a station calling you.
e DTSS and Page allow selective calling of specific
stations. In addition, combining Tone Alert with Page
lets you know who called and when.
e Innovative Menu Set-up method combines
sophisticated features with simple operation;
ergonomic design places only the most frequently-
used keys on the Front Panel without losing desired
features.
ACCESSORIES
Accessory
Part Number | Quantity
U.S.A.,
Canada,
General!
T91-0517-XX
Europe,
General’
T91-0516-XX
DC
power
cable
E30-2111-XX
Fuse
TM-251: 15A
TM-451: 10A
Microphone
F51-0017-XX
F51-0016-XX
J29-0614-XX
J21-4469-XX
N99-0384-XX
W01-0426-XX
Mounting bracket
Warranty card
(U.S.A., Canada, Europe”)
Instruction
manual
B62-0455-XX
1 Exciuding some General market versions.
. Excluding some European versions.

CONVENTIONS FOLLOWED IN THIS
MANUAL
The writing conventions described below have been
followed to simplify key stroke instructions and avoid
unnecessary repetition. This format is less confusing for
the reader. Reviewing the following information now will
reduce your learning period. That means less time will
be spent reading this manual; more time will be available
for operating.
Note: Basic procedures are numbered sequentially to guide you
step-by- step. Additional information pertaining to a step, but not
essential to complete the procedure, is provided in bulleted form
following many steps for further guidance.
INSTRUCTION MEANING
Press the key.
Press the keys | Press and hold
simultaneously. | KEY1 down, then
press KEY2.
Press KEY1
momentarily,
release KEY1,
then press KEY2.
With the
transceiver power
OFF, press and
hold KEY, then
turn ON the
transceiver power
by pressing
[PWR].
WHAT TO DO
Press and release!
KEY.
Press the keys
in sequence.
Press the key
[KEY] + POWER ON.| while powering
the transceiver.
Press the
Function key fo
longer than 1
second.
Press and hold
the Function key
until the "F"
indicator on the
Display begins
flashing.
Press the key
for longer than
1 second.
Press and hold
KEY until the
function begins.
[KEY] (1 s).

PREPARATION
FOR
MOBILE
OPERATION
When
operating
mobile,
do
not
attempt
to
configure
your
transceiver
or
change
Menu
settings
while
driving
because
it
is
simply
too
dangerous.
Stop
the
car
first,
then
make
the
necessary
changes.
Also,
be
aware
of
local
laws
pertaining
to
the
use
of
headphones/headsets
while
driving
on
public
roads.
If
in
doubt,
do
not
wear
headphones
while
mobiling.
MOBILE INSTALLATION
Install
the
transceiver
in
a
safe,
convenient
position
inside
your
vehicle
that
minimizes
danger
to
your
passengers
and
yourself
while
the
vehicle
is
in
motion.
For
example,
consider
installing
the
transceiver
under
the
dash
in
front
of
the
passenger
seat
so
that
knees
or
legs
will
not
strike
the
transceiver
during
sudden
braking
of
your
vehicle.
Try
to
pick
a
well-ventilated
location
that
is
shielded
from
direct
sunlight.
g Installation Example
1
Install
the
mounting
bracket
using
the
supplied
flat
washers
and
self-tapping
screws.
There
are
4
washers
and
4
screws
supplied.
e
The
bracket
can
be
mounted
with
the
bracket
opening
for
the
transceiver
facing
down
for
underdash
mounting,
or
with
the
opening
facing
up.
e
If
mounted
underdash,
the
bracket
must
be
installed
so
that
the
3
screw
holes
on
the
edge
of
each
bracket
side
are
facing
forward.
This
allows
you
to
mount
the
transceiver
horizontally
or
to
angle
it
upward.
If
mounted
with
the
bracket
opening
facing
upward,
position
the
bracket
with
the
3
holes
facing
forward
to
angle
the
transceiver
upward.
Position
the
bracket
with
the
3
holes
facing
the
rear
if
you
plan
to
angle
the
transceiver
downward.
The
transceiver
can
be
mounted
horizontally,
angled
neither
up
nor
down,
with
the
bracket
positioned
either
way.

2 Position the transceiver in the bracket to determine
the best viewing angle.
3 Insert and tighten the supplied hexagon SEMS
screws and washers. There are 2 screws and
2 washers supplied for each side of the bracket.
e Double check that all hardware is tightened to
prevent vehicle vibration from loosening the
bracket or transceiver.
y SEMS screw
Flat washer see 1
“4 kK 1 om
Self-tapping screw
Mounting
bracket
SEMS screws
Stacking plate
DC POWER CABLE CONNECTION
Route the DC power cable supplied with the transceiver,
or an optional DC cable equipped with a noise filter,
directly to the vehicle’s battery terminals using the
shortest path from the transceiver. If using a noise filter,
it should be installed with an insulator to prevent it from
touching metal on the vehicle. It is not recommended to
use the cigarette lighter socket since some cigarette
lighter sockets introduce an unacceptable voltage drop.
Noise filter supplied %
with PG-3B yy
Power supply connector
eeee
ed (+) Fuse holders
</ with 20 A fuses
Double check cable
connections at the
battery to confirm
correct polarities
(Red => Positive,
Black + Negative).

Passenger compartment
To
prevent
the
risk
of
short
circuits,
disconnect
other
wiring
from
the
negative
(—)
battery
terminal
before
connecting
the
transceiver.
Confirm
the
correct
polarity
of
the
connections
before
attaching
the
power
cable;
red
connects
to
the
positive
(+)
terminal,
black
connects
to
the
negative
(—)
terminal.
Use
the
full
length
of
the
cable
without
cutting
off
excess
even
if
the
cable
is
longer
than
required.
In
particular,
never
remove
the
fuse
holders
from
the
cable.
After
completing
transceiver
connections
to
the
battery,
then
reconnect
any
wiring
removed
from
the
negative
terminal.
If
the
power
cable
must
be
routed
through
a
hole
in
the
vehicle
chassis
or
body,
for
example
in
the
firewall
at
the
front
of
the
passenger
compartment,
use
a
rubber
grommet
to
protect
the
cable
from
abrasion.
The
entire
length
of
the
cable
must
be
dressed
so
it
is
isolated
from
heat
and
moisture.
After
the
cable
is
in
place,
wind
heat-
resistant
tape
around
the
fuse
holder
to
protect
it
from
moisture.
Tie
down
the
full
run
of
cable.
The
vehicle
battery
must
have
a
nominal
rating
of
12
V.
Never
connect
the
transceiver
to
a
24
V
battery.
Be
sure
to
use
a
12
V
vehicle
battery
that
has
sufficient
Current
capacity.
If
the
current
to
the
transceiver
is
insufficient,
the
Display
may
darken
during
transmission,
or
transmit
output
power
may
drop
excessively.
Only
after
completing
the
installation,
connect
the
transceiver’s
power
supply
connector
to
the
DC
power
cable.
Press
the
connectors
firmly
together
until
the
locking
tab
clicks.

mg Replacing Fuses
If the fuse blows, determine the cause then correct
the problem. After the problem is resolved, then
replace the fuse. If newly installed fuses continue to
blow, disconnect the power cable and contact your
dealer or nearest Service Center for assistance.
Fuse Location Fuse Current Rating
TM-251NV/E
TM-451ANV/E
Supplied Accessory
DC Power Cable
CAUTION: Only use fuses of the specified type and rating.
Note: /f you use the transceiver for a long period when the
vehicle battery has not been fully charged, or when the engine
has been stopped, the battery may become discharged, and will
not have sufficient reserves to start the vehicle. Avoid using the
transceiver under these conditions.
ANTENNA CONNECTION
Before operating mobile, you must first install an
efficient, well-tuned antenna. The success of your
mobile installation will depend largely on the type of
antenna and its correct installation. The transceiver can
give excellent results if the antenna system and its
installation is given careful attention.
Your choice of antenna should have a 50 ohm
impedance to match the transceiver input impedance.
Use low-loss coaxial feed line that also has a
characteristic impedance of 50 ohms. Coupling the
antenna to the transceiver via feed lines having an
impedance other than 50 ohms reduces the efficiency of
the antenna system, and can cause interference to
nearby broadcast television receivers, radio receivers,
and other electronic equipment.
To antenna
ANT connector Feed line connector
CAUTION: Transmitting without first connecting an antenna or other
matched load may damage the transceiver. Always connect the
antenna to the transceiver before transmitting.

PREPARATION
FOR
FIXED
STATION
OPERATION
The following diagram illustrates how to make
connections to the rear panel of the transceiver.
Connect
all
cables
securely
so
they
will
not
come
loose
if
pulled.
Fuse holder
Red (+)
DC power cable
included with transceiver Black (—)
+ |
mA
WMA,
Regulated DC power
supply (e.g., PS-33)
AC outlet
DC
POWER
SUPPLY
CONNECTION
In
order
to
use
this
transceiver
for
fixed
station
operation,
you
will
need
a
separate
13.8
V
DC
power
supply
that
must
be
purchased
separately.
DO
NOT
directly
connect
the
transceiver
to
an
AC
outlet!
Use
the
supplied
DC
power
cable
to
connect
the
transceiver
to
a
regulated
power
supply.
Do
not
substitute
a
cable
with
smaller
gauge
wires.
The
following
table
lists
the
current
capacity
recommended
for
power
supplies
used
with
each
type
of
transceiver.
Transceiver
Model
Power
Supply
Capacity
TM-2514V/E
11
Aor
more
TM-451A/E
10
A
or
more
First
connect
the
DC
power
cable
to
the
regulated
DC
power
supply
and
check
that
polarities
are
correct
(Red:
positive,
Black:
negative).
Then
connect
the
transceiver’s
DC
power
connector
to
the
connector
on
the
DC
power
cable.
Press
the
connectors
firmly
together
until
the
locking
tab
clicks.

Note:
» For your transceiver to fully exhibit its performance capabilities,
the following optional power supply is recommended:
PS-33 (20.5 A, 25% duty cycle).
» Before connecting the DC power supply to the transceiver, be
sure to switch the transceiver and the DC power supply off.
> Do not plug the DC power supply into an AC outlet until you make
all connections.
m Replacing Fuses
If the fuse blows, determine the cause then correct
the problem. After the problem is resolved, only then
replace the fuse. If newly installed fuses continue to
blow, disconnect the power plug and contact your
dealer or nearest Service Center for assistance.
Fuse Location Fuse Current Rating
TM-251NVE 15A
TM-451NVE 10A
Supplied Accessory 20A
DC Power Cable
CAUTION: Only use fuses of the specified type and rating.
ANTENNA CONNECTION
The type of the antenna system, consisting of the
antenna, ground, and feed line, will greatly affect the
successful performance of the transceiver. Use a
properly adjusted 50 ohm antenna of good quality
designed for operation at your operating frequency to let
your transceiver perform at its best.
Install low-loss 50 ohm coaxial cable and a first quality
connector for the connection to the transceiver. For
longer feed line runs, especially for operation at UHF
frequencies, you might consider investing in "hardline"
transmission line. Hardline is available in larger
diameters and has much lower loss than coaxial cable.
The lower loss can make a significant difference for
those interested in weak signal operation. In all cases,
match the impedance of the feed line and antenna so
that the SWR is minimum. Generally, an SWR
measurement of 1.5:1 or less is considered satisfactory.
All connections must be clean and tight. Coupling the
antenna to the transceiver via feed line having an
impedance other than 50 ohms reduces the efficiency of
the antenna system. It also can cause interference to
nearby broadcast television receivers, radio receivers,
and other electronic equipment.
CAUTION:
> All fixed stations should be equipped with a lightning arrester to
reduce the risk of fire, electric shock, and transceiver damage.
> Transmitting without first connecting an antenna or other
matched load may damage the transceiver. Always connect the
antenna to the transceiver before transmitting.

ACCESSORY
CONNECTIONS
EXTERNAL SPEAKER
Use
an
external
speaker
with
8
ohms
impedance.
The
jack
accepts
a
3.5
mm
diameter
mono
(2-conductor)
plug.
Recommended
speakers
include
the
SP-50B
and
SP-41.
Connecting
an
external
speaker
automatically
cuts
off
audio
to
the
internal
speaker.
MICROPHONE
To
communicate
in
the
voice
modes,
plug
a
600
ohm
microphone
equipped
with
an
8-pin
modular
connector
into
the
modular
socket
on
the
Front
Panel
of
the
transceiver.
Press
firmly
on
the
plug
until
the
locking
tab
clicks.
Microphone
modular
socket
Locking tab
8-pin modular plug
Microphone cable
PACKET EQUIPMENT
If
you
intend
to
use
this
transceiver
for
Packet
operation,
you
will
need
the
following
equipment:
e
Personal
computer
with
communications
software
(Alternatively,
a
"dumb"
terminal
capable
of
sending
ASCII
commands)
e
TNC
(Terminal
Node
Controller)
e
TNC
power
supply
e RS-232C cable
©
6-pin
mini
DIN
plug
(PG-5A)
Refer
to
the
accompanying
diagram
and
the
associated
instruction
manuals
to
configure
the
equipment
as
shown.
Connect
your
TNC
to
the
DATA
connector
on
the
transceiver
Rear
Panel
using
a
cable
equipped
with
a
6-pin
mini
DIN
plug.
Do
not
share
a
single
power
supply
between
the
transceiver
and
the
TNC.
Keep
as
wide
a
separation
between
the
transceiver
and
computer
as
practical
to
reduce
noise-pickup
by
the
transceiver.

mg DATA Connector Pinout
Personal computer/dumb terminal
Pin Pin
Number | Name
ba
Function
Packet data input
¢ Transmit data from TNC to
transceiver
Ground for PKD
PKD
TNC power
© © supply
Packet standby
« TNC can use this pin to
inhibit the transceiver
microphone input while
transmitting packet signals.
E (GND)
2) o)
Detects 9600 bps data.
Detects 1200 bps data.
Squelch control output
«Inhibits TNC data transmit
while transceiver squelch is
open.
6 SQc
Transceiver
power supply
10

GETTING ACQUAINTED
The following sections describe basic functions of the Front Panel controls and buttons, Rear Panel jacks and
connectors,
microphone
buttons
and
Display
indicators.
For
full
explanations
of
functions
mentioned,
refer
to
the
appropriate section
elsewhere
in
the
manual.
FRONT PANEL

YOUR FIRST QSO
If
you
tend
to
discard
instruction
manuals
along
with
the
packaging
material....please
don’t.
The
5
steps
below
will
get
you
on
the
air
in
your
first
QSO
within
minutes
to
allow
you
to
experience
the
exhilaration
that
comes
with
Opening
a
brand
new
transceiver.
After
trying
the
rig
for
a
while,
settle
back
in
your
most
comfortable
operating
chair
with
this
manual
and
your
favorite
drink
for
an
hour
or
two.
The
time
spent
will
be
worthwhile.
1
Connect
a
13.8
V
DC
power
source
to
the
power
connector,
and
a
suitable
antenna
to
the
antenna
connector.
2
Turn
the
VOL
and
SQL
controls
to
approximately
9
o’clock.
3 Press [PWR].
¢
The
default
frequency
appears
on
the
Display.
4
Turn
the
Tuning
control
to
select
a
frequency.
5
If
accessing
a
repeater,
press
[SHIFT]
to
select
a
standard
positive
transmit
offset.
Repeat
to
select
a
negative offset.
e
Either"
+"
or
“—"
appears.
e
If
a
subaudible
tone
is
required
to
access
the
repeater:
a)
Press
[F],
[TONE/CTCSS].
b)
Turn
the
Tuning
control
to
select
a
Tone
frequency.
c)
Press
[TONE/CTCSS]
to
exit
from
Tone
Select.
d)
Press
[TONE/CTCSS]
again
to
turn
ON
the
TONE
function.
6
When
the
frequency
is
clear,
press
[PTT]
and
begin
communicating.
e
Release
[PTT]
to
receive.

@® VFO button
Provides the following 5 functions:
e VFO mode select {page 32}
¢
Menu
function
select
(descending
order)
{page
22}
e
VFO
Scan
{page
59}
e
Memory/Call
channel
transfer
to
VFO
{page
42}
e Partial reset {page 46}
@MR (Memory Recall) button
Provides the following 5 functions:
« Memory Recall select {page 41}
e
Menu
function
select
(ascending
order)
{page
22}
e
Memory
Scan
{page
58}
e Memory Write {page 39}
e Full reset {page 46}
@F (Function) button
Provides the following 3 functions:
e Multiple key function select
e
Menu
Set-up
enter
{page
22}
e
Menu
Set-up
exit
{page
22}
@®VOL (Volume) control
Adjusts
the
level
of
receive
audio
from
the
speaker
{page
28}.
@PWR (Power) switch
Switches
the
transceiver
ON
or
OFF
{page
28}.
Also
used
in
conjunction
with
other
keys
to
access
Menu
B
{page
24}
or
initialize
the
microprocessor
and
its
memory
{page
46}.
®@TUNING control
Provides
the
following
6
functions:
¢
Selects
transmit/receive
frequencies
{page
32}
and
frequency
limits
{pages
33
and
59}.
¢
Selects
memory
channels
in
Memory
Recall
{page
41}.
¢
Selects
available
choices
when
configuring
Menu
functions {page 22}.
Selects
subaudible
Tone
frequency
{page
52}
and
transmit offset {page 50}.
¢
Selects
scan
direction
{page
58}.
©
Selects
DTSS/page
codes
{pages
76
and
79}: