Kenwood TM 321 A Owners Manual

Page 2

Thank you for purchasing the new transceiver. This
unit has been carefully engineered and manufac-
tured to rigid quality standards, and should give you
satisfactory and dependable operation for many
years.

IMPORTANT: %

1. Please read this Instruction Manual carefully
before placing your transceiver in service.

2. Save this Instruction Manual.

This Instruction Manual covers the following
models:

TM-221A : 144MHz FM transceiver (45W)
(U.S.A. and general markets)

TM-221ES: 144 MHz FM transceiver I45W)
(U.K. and European markets)

TM~321A :220 MHz FM transceiver (25W)
(U.S.A. only)

TM-421A :430 MHz FM transceiver (35W)
(General markets)

TM-421A :440 MHz FM transceiver 135W)
(U.S.A. only)

TM-421ES : 430 MHz FM transceiver (35W)
(U.K. and European markets)

TM-521A : 1200 MHz FM transceiver (10W)
(U.S.A. only)

TM-521E : 1200 MHz FM transceiver (10W)
(European market)

When there are differences in operation,
separate instructions will be given for each
model. Illustrations show the TM~221 A.

The following explicit definitions apply in this

manual:

Warning: Risk of fire or electric shock may occur.
Do not disregard !

Caution : Equipment damage may occur, but not
personal injury.

Note : If disregarded, inconvenience only, no risk
of equipment damage or persona) injury.

TM-221ES/421ES MODEL IDENTIFICATION NOTES.
Please note that these model numbers do not appear
on the front panel of the radio. It will appear on the
Model Number Plate on the bottom of the radio and
on the shipping box. The front panel will only say
TM-221E or TM-421 E.

1. BEFORE OPERATION ...................................
2. SPECIFICATIONS AND ACCESSORIES
2-1 .
2-2.
3. INSTALLATION AND CONNECTION ..
3-1 .
3-2,
4. OPERATION .................................
4-1 ,
4-2.
4-3.
4~4,
45,
4-6.
4-7.
4-8.
5. MAINTENANCE AND ADJUSTMENT.
5-1 .

CONTENTS

SPECIFICATIONS ......
ACCESSORIES .........

INSTALLATION ....................
CONNECTIONS .........................

oomumoame-Aw

CONTROL FUNCTIONS . ..
RECEPTION ...................................... 1 1
TRANSMISSION .................................... 13
MEMORY ......
SCAN ........................................
REPEATER ...............................
TONE FREQUENCY SELECTION.
TONE SQUELCH (CTCSS) ......

GENERAL INFORMATION . ..

5-2. SERVICE ..........................

5-3, CLEANING ..................................

54. IN CASE OF DIFFICULTY ...................

5-5. MICROPROCESSOR BACKUP LITHIUM

BATTERY REPLACEMENT ....................... 19

5-6. FUSE REPLACEMENT ....... ..19

5-7. ORDERING SPARE PARTS. .19

5-8. ADJUSTMENTS ........... ..19
6. OPTIONAL ACCESSORIES ........................... 20

6-1. TSU-5 PROGRAMMABLE TONE

62.
6-3.
7. BLOCK DIAGRAM AND CIRCUIT DIAGRAM
7-1 ,
7-2.
8. REFERENCE .............
8-1 .
8»2.

DECODER UNIT ..................................... 20
M0433 HAND MICROPHONE
OTHER ACCESSORIES ........

BLOCK DIAGRAM ...........................
CIRCUIT DIAGRAM .

ANTENNA .......... ..
MOBILE INSTALLATION HINTS ................. 30

Page 15

4-53. Scan Direction

Scanning begins in the direction that corresponds to
the direction that the TUNING control was last turn-
ed, or with respect to which of the microphone
UP/DWN switches was last depressed. If you press-
ed the UP switch before initiating scan, scan will pro-
ceed in a positive direction. If the DWN switch was
pressed scan will tune down in frequency.

4-5-4. Scan Hold

The transceiver will stop on a busy channel and then
resume after a 5-second delay. You must cancel
scan operations to remain on the channel.

4-5-5. Memory Channel Lockout

The Memory Channel Lockout function allows you to

temporarily skip unwanted Memory Channels during

the Memory Channel Scan mode.

1. Press the VFO/M key to select the Memory
Channel mode.

2, Select the Memory Channel that you want to
skip using the TUNING control or the UP/DWN
switches.

3. Press the M.lN key and then the SCAN key.
Whenever the M.lN key is pressed, the M in-
dicator will turn on. You must complete the
desired action within 5 seconds, or the M in-
dicator will turn off. If the indicator goes off, you
must press the M.lN key again. A star Hr) will
appear to the left of the Memory Channel
Number. This indicates the Memory Channel will
be skipped during scan operations.

4. To cancel the Memory Channel Lockout press
the M.lN key and then the SCAN key.

4-5-6. Priority Alert (TM-221ES/421ES only)
Memory Channel 1 will be checked at approximately
5-second intervals to check for activity. If the fre-
quency is occupied, a beep will sound. If the audio
confirmation function has been turned off, no beep
will sound, even if Memory Channel 1 is busy.
Pressing the ALERT key will switch this function off
and on.

Note:
The alert function will not work when the RC-1O is
connected to the TM-221ES/421ES.

4-6. REPEATER

4-6-1. Transmitter Offsets

All amateur radio repeaters utilize a separate receiver
and transmitter section. The receiver frequency may
be either above or below the transmitter frequency.
For most repeater's offsets are as follows:

TRANSMITTER OFFSET FREQUENCY

This transceiver allows you to store the frequency,
and offset direction in Memory Channels 0-9, and
A-b, or you can select these functions directly from
the keyboard.

(With the TM~221AI321Al

mm! + T The TM-221A/321A have been programmed accor-
Model Hl - "(*l ding to the standard ARRL Band Plan, regarding
TM-221 series +600 kHz -600 kHz transmitter offsets. Please see the enclosed charts
TM-321A + 1.6 MHz -1,e MHz for additional information. You can, of course, over-
TM-421A + 5 MHz _5 MHz ride this by using the SHIFT function, if desired.
European ,.. *
~1.6 MHz -7.6 MHz
TM.421ES market
UK.
market +1.6 MHz -1.6 MHz
TM-521A +12 MHz -12 MHz
TM-521E +35 MHz -6 MHz
With the TM-221A
144.00 145.10 145.50 145.00 146.40 146.60 147.00 147.40 147.60 148.00 1mm)
S S - S + S - + S - S
s: Simplex Channel
With the TM-321A
220.000 223.940 224.995 (MHz)
S S - S
S: Simplex Channel
15