Kenwood TS-50S User manual

HF TRANSCEIVER
TS-50S
INSTRUCTION MANUAL
KENWOOD CORPORATION
©PRINTED IN JAPAN 862-0291-30(K. M, E. p. X)(MC)
93112 11 10 9 8 7 6 5

IMPORTANT SAFETY INSTRUCTIONS
Thank you for purchasing this new
transceiver.
Noticeto the user:
One or more of the following statements
may be applicable
to this equipment.
.
FCC WARNING
,
i 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 into an
outlet on a circuit different from that
to which the receiver is connected. ,
Consult the dealer for technical i
assistance.
SAFETY PRECAUTIONS
Please read all safety and operating instructions before
using this
unit For best results, be aware of all
warnings on the unit and follow the provided operating
instructions. Retain these safety and operating
instructions for future reference.
1 Power Sou rces
Connect this unit only to the power source
described in
the operating instructions or as
marked on the unit itself.
2 Power Cable Protection
Route all power cables safely. Ensure the power
cables can neither be walked upon nor pinched by
items placed near or against the cables. Pay
particular attention to locations near AC
receptacles, AC extension bars and points of entry
to the
unit
Never pull or stretch
the cord.
3 Abnormal Odors
The presence of an unusual odor or smoke is
often a sign of trouble, Immediately turn the
power
OFF and remove the power cable. Contact
a dealer or the nearest service center for advice.
POWER OFF!
~~
4 Electrical Shocks
Take care not to drop objects or spill liquids into
the unit through enclosure openings. Metal
objects, such as hairpins or needles, inserted into
the unit may
contact voltages resulting in serious
electrical shocks. Never permit children to insert
any objects into this
unit
5 Grounding and Polarization
Do not attempt to defeat methods used for
grounding and electrical polarization
in the unit,
particularly involving the input power cable.
2

IMPORTANT SAFETY INSTRUCTIONS
6 Ventilation
Locate the unit so as not to interfere with its
ventilation.
Do not place books or other
equipment on the unit
that may impede the free
movement
of air. Allow a minimum of 4 inches (10
cm) between the rear of the unit and the wall or
operating desk shelf.
7 Water and Moisture
Do not use the unit near water or sources of
moisture. For example, avoid use near bathtubs,
sinks, swimming pools, and in damp basements
and attics.
8
Outdoor Antenna Grounding
3
Adequately ground all outdoor antennas used with
this unit using approved methods. Grounding
helps protect against voltage surges caused by
lightning. It also reduces the
chance of a build-up
of static charges. Section 810 of the National
Electrical Code, ANSI/NFPA 70, provides
information with respect to proper grounding
of the
mast and supporting structure, grounding of the
lead-in wire to an antenna discharge unit, size
of
grounding conductors, location of antenna-
discharge unit, connection to grounding
electrodes, and requirements for the grounding
electrode. See
the accompanying illustration.
<)lAMPLE OF- ANTE'!" .. GFIOIJNOING AS P£!<
NATIONAL HECTA,CAL CODE
ELECTAIC
SERVICE
EQUlflMEN"T
NEe - NAroo""," ELECTRICAL CDOE
"'NTE~"A
lfAD 110
WI~E
ANTENNA
DISCHARGE UNIT
!NEe SECTION 810-201
GIIOUNOING CONDUCTORS
lM'e SECTION 910-21>
9 Power Lines
Minimum recommended distance for an outdoor
antenna from power lines
is one and one-half
times the vertical height
of the associated antenna
support structure. This distance allows adequate
clearance from the power lines if the support
structure should fall for any reason.
10 Heat
Locate
the unit away from heat sources such as
radiators, stoves, amplifiers or other devices that
produce substantial amounts
of heat.
11
Cleaning
Do not use volatile solvents such as alcohol, paint
thinner, gasoline or benzene to clean the cabinet.
Use a clean dry cloth.
12 Periods of Inactivity
Disconnect the input power cable from the power
source when the unit
is not used for long periods
of time.
13 Servicing
Remove the unit's enclosure only to do accessory
installations described by this manual
or accessory
manuals. Follow provided instructions carefully to
avoid electrical shocks. If unfamiliar with this type
of work, seek assistance from an experienced
individual, or have a professional technician do the
task.
14 Damage Requiring Service
Enlist the services of qualified personnel in the
following cases:
a) The power supply cable or plug is damaged.
b) Objects have fallen, or liquid has spilled into the
unit.
c) The unit has been exposed to rain.
d) The unit is operating abnormally or performance
has degraded seriously.
e) The unit has been dropped, or the enclosure
damaged.

GENERAL DESCRIPTION
Thank you for purchasing this new KENWOOD
compact HF transceiver. This transceiver has many
powerful features. To get the most out of these
features, we suggest you read this instruction manual
carefully, and keep it handy for further reference.
This transceiver provides these main features:
1 This radio is so compact that you can easily
transport, install and operate from either a
portable, mobile or fixed station installation.
2 Setting-up
transceiver functions is simple with
the easy-to-use Menu System. The transceiver
delivers dozens offunctions required by hams.
3 The Busy-Frequency Stop automatically stops
scan
on a busy frequency. Time Operated and
Carrier Operated modes are provided for this
function.
4 The
tuning control automatically changes the
frequency step, depending
on howfast the control
is rotated. (Achieved by a "fuzzy logic" control
technique).
5 The TF-SET function allows changing the transmit
frequency while still listening to your received
signal.
6 The Automatic Power Off function switches off
the power if the transceiver has not been operated
for approximately three hours.
7 The
MC-47 microphone allows assigning four
control functions to the microphone
PF
(Programmed Function) keys.
In addition, this transceiver offers many other HF
transceiver functions, even though it is very compact.
Information:
1 Noise entering from the DC power supply, or static
electriCity may disable the buttons or the tuning
control. If this occurs, determine the source of the
interference and take appropriate measures to
reduce or eliminate the offending noise. If the
transceiver still does not function normally, reset
the microprocessor. (For the reset procedure, refer
to page 45.)
2 Resetting the transceiver will clear the memory
channels and return the menu settings (described
later) to their default values.
3 This transceiver contains a cooling fan.
As the
heat sink temperature rises because of continuous
transmission, the fan speed accelerates to its
maximum speed, and the sound of the fan will
become more noticeable. If the heat sink
temperature becomes excessively high, the
temperature protection circuit will trip to reduce the
transmission output.
For extended transmit periods, or when operating
FM
or RTTY, we recommend selecting 50 W or 10 W
transmitter output power.
4

TABLE OF CONTENTS
CHAPTER 1 INSTALLATION AND
CONNECTION
PREPARATION FOR MOBILE OPERATION ........ 7
Mobile Installation ......................... 7
DC Power Cable Connection . . . . . . . . . . . . . . 7
Antenna Connection
....................... 7
Ground Connection
........................ 8
Ignition Noise ........................ . 8
PREPARATION FOR FIXED STATION OPERATION. 9
DC Power Supply Connection ....... . . . . . . .. 9
Antenna Connection
....................... 9
Ground Connection
........................ 10
ACCESSORY CONNECTIONS ................... 11
CHAPTER 2 CONTROLS AND
CONNECTORS
FRONT PANEL CONTROLS .................... 12
REAR PANEL CONNECTORS ................... 18
DiSPLAy.............................. 19
CHAPTER 3 COMMUNICATION
CONFIRMATION BEFORE OPERATION .......... 21
SSB OPERATION ............................. 22
Reception
............................... 22
Transmission
............................. 22
CW OPERATION
.. ....................... 23
Reception
................................ 23
Transmission
............................. 24
FM OPERATION .............................. 25
Reception
............................... 25
Transmission
............................. 25
AM OPERATION
............................. 26
Reception
............................... 26
Transmission ............................. 26
DATA OPERATION (PACKET, AMTOR, RTTYj ..... 27
Reception
............................... 27
Transmission
............................. 28
FM REPEATER OPERATION ................... 29
SPLIT-FREQUENCY OPERATION ............... 30
5
CHAPTER 4 MEMORY FEATURES
MICROPROCESSOR MEMORY BACKUP ...
..31
MEMORY CHANNEL DATA .................... 31
MEMORY CHANNEL STORAGE ................ 31
Simplex-frequency Channel Storage ......... 31
Split-frequency Channel Storage ............ 32
Scan Start and End Frequency Storage ....... 32
MEMORY CHANNEL RECALL .................. 33
MEMORY CONTENTS CONFIRMATION .......... 33
MEMORY TRANSFER ......................... 33
MEMORY CHANNEL CLEAR ................... 34
MEMORY CHANNEL PROTECT ................. 35
Memory Protect1
......................... 35
Memory Protect 2
......................... 35
QUICK MEMORY CHANNEL SELECT ............ 36
Selecting a Channel Containing Data ........ 36
Selecting an Empty Channel ................ 36
CHAPTER 5 SCAN
MEMORY SCAN ............................. 37
Group Scan
.............................. 37
All-channel Scan ......................... 37
Confirming Start and
End Frequencies ........ 38
Memory Channel
Lock-Out ................. 38
PROGRAM SCAN ............................ 39
Scan .................................... 39
Confirming Start and
End Frequencies ........ 39
Scan Hold ............................... 39
BUSY-FREQUENCY STOP.
................. 40
SCAN SPEED CHANGE ....................... 40

CHAPTER 6 OTHER USEFUL FEATURES
CONTROLS ................................. 41
Frequency Step Change ................... .41
Amateur Band Switching ................... 41
RIT Operation ............................ 41
DUAL DIGITAL VFOs .......................... 42
AUTOMATIC POWER OFF (APO) ................ 42
INTERFERENCE AND NOISE ELIMINATION ....... 43
IF Shift .................................. 43
IF Filter .................................. 43
Noise Blanker ............................ 43
AUDIO AND SOUND FEATURES ................ .43
Beep Tone .............................. .43
Mode Confirmation Tone Output ............. 43
Morse Code Alarm Output .................. 44
Carrier Point Shift ......................... 44
MICROPROCESSOR RESET .................... 45
Initial Settings ............................ 45
Reset ................................... 45
CHAPTER 7 MENU SET-UP
MENU A SEITING ............................ 46
MENU B SEITING .................. .
CHAPTER 8 OPERATION USING
ACCESSORIES
47
LINEAR AMPLIFIER ........................... 48
Connection to the Transceiver .............. .48
AUTOMATIC ANTENNA TUNER ................. 48
Connection to the Transceiver .............. 48
Operation ................................ 48
MICROPHONE ............................... 49
UP and DWN Buttons ...................... 49
PIT Button ............................... 49
Programmable Function Keys
............... 49
CHAPTER 9 MAINTENANCE AND
ADJUSTMENTS
GENERAL INFORMATION ..................... 51
SERViCE .................................... 51
CLEANING .................................. 51
TROUBLESHOOTING .......................... 52
Reception. . . . .
...................... 52
Transmission
............................. 53
ADJUSTMENTS .............................. 54
REFERENCE FREQUENCY CALIBRATION
........ 54
CHAPTER 10 OPTIONS INSTALLATION
FILTER........ . ........................ 55
TCXO UNIT (SO-2) ............................ 56
OPTIONAL ACCESSORIES ................. .57
SPECiFiCATIONS ......................... .59
ACCESSORIES
MC-47 Multifunction Microphone
(T91-D528-05)
............................ 1ea.
DC Power Cable (E30-3157-05) .............. 1ea.
Handle (K01-0416-05)
...................... 1ea.
Calibration Cable (E31-2154-05)
.............. 1ea.
To set the reference frequency
Fuse, 25A (F05-2531-05)
.................... 1ea.
For the
DC power cable
Fuse,4A (F06-4029-05) .....
.. ...... 1 ea.
For internal Circuitry
Mounting
Bracket (J29-0422-13) ............. 1ea.
Screws (N99-0321-05) ...................... 1set
Warranty Card
........................... 1 copy
U.S.A./Canada and Europe versions only
Instruction Manual (B62-0291-00)
........... 1 copy
Save the box and packing in the eventthe transceiver
is to be transported for portable or remote operation,
or shipped for upgrade, maintenance or service.
6

1 INSTALLATION AND CONNECTION
PREPARATION FOR MOBILE OPERATION
When you use this transceiver for mobile operation, do
not attemptto perform any kind of configuration or
menu set-up operation while driving your car, simply
because it is too dangerous. Stop the car and then
perform transceiver configuration.
In addition, do not
wear headphones when you are driving.
MOBILE INSTALLATION
.You should install the transceiver in a safe and
convenient position inside your vehicle so as not to
subject yourself to danger while driving.
For example, install the transceiver under the dash
in
front of the passenger seat so that knees or legs will
not strike the radio if you brake suddenly.
• Installation example
1 Install the mounting bracket using the supplied flat
washers and self-tapping screws.
2 Position the transceiver
in the bracket to
determine the best viewing angle.
3 Insert and tighten the supplied SEMS screws and
washers.
7
Flat washer
Self-tapping screw
You can also use the optional MB-13 mounting
bracket. For the correct mounting procedure, refer
to the instructions packaged with the MB-13.
DC POWER CABLE CONNECTION
Connect the DC power cable directlyto the vehicle's
battery terminals using
the shortest route, Do not use
the cigarette lighter
socket since vibration may loosen
the connection, resulting
in poor transceiver
performance due to an unstable power source.
12 V battery V
Make sure the
are correct.
+ -polarities
Fuse holder
d
'I
L:T
Supplied DC power cable
Be sure to use a
12 V vehicle battery which has
sufficient current capacity.
If the current to the transceiver is insuffiCient, the
display may darken during transmission (at audio
peaks during SSB operation), or transmitter output
power may drop excessively.
Note: If 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
Use a whip antennafor mobile operation. HF mobile
antennas are larger (and have a larger wind load) and
are heavier than
VHF antennas. Therefore, use a
strong and rigid mount
to safely and securely install
the HF mobile 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.
The performance requirements of a mobile antenna
are the same as those for a fixed station installation.
(Refer to page
9.)

1 INSTALLATION AND CONNECTION
GROUND CONNECTION
The ground, which is the other half of the antenna
system, is very important when using a mobile whip
antenna. Connect the feed line ground for the antenna
securely
to the vehicle's chassis, and be certain to
bond (electrically connect) the vehicle body to the
chassis. The sheet metal will provide
the primary
ground plane, so be sure to establish a good
RF
connection from the feed line to both the chassis and
the body.
For comprehensive information on mobile
antennas and their successful installation and
optimization, refer to the ARRL Handbook or similar
publications.
If your car has plastiC bumpers, make sure to ground
the antenna mount to the body and the chassis of
the
car.
IGNITION NOISE
This transceiver has been designed with a Noise
Blanker to filter ignition noise. However, some cars
may generate excessive ignition noise. If there is
excessive noise, use suppressor spark plugs (with
resistors), or perform other countermeasures as may
be required to reduce these undesired electrically
generated noises. The ARRL Handbook, or other
similar reference, has a wealth of information regarding
this topic.
Note:
The negative lead from the battery must remain disconnected
until all connections are completed, In order to prevent the
possibility of an accidental short circuit during installation.
2 After installation and wiring, confirm that all work has been
performed correctly, then reconnect the negative battery lead.
3 If the fuse blows, check that the power cable has not been
damaged
or short circuited, is not pinched Of squashed, etc.
After resolving the problem, replace the fuse with one of the
same type and rating.
4 After the wiring is finished, wrap the fuse holder with heat·
resistant tape to protect the fuse against heat and moisture.
5 DO NOT remove the fuse holder even if the power cable is
too long.
8

1 INSTALLATION AND CONNECTION
PREPARATION FOR FIXED STATION OPERATION
The following figure illustrates how the cables must be
connected on
the rear of the transceiver. Connect the
cables securely so they will not come loose if they are
pulled.
Speaker
DC 13.8 V
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, which may be purchased separately.
DO NOT
attempt to directly connect the transceiver to an AC
outlet!
DC power
supply
AC
13.8 V
+-
Make sure the
polarities are correct.
Fuse holder
/
DC power cable (supplied)
This transceiver draws less than 20.5 A (with an
optional automatic antenna tuner, less than 22.5
A)
when transmitting at full power output.
Kenwood recommends you use the optional
DC power
supply, model PS-33, which matches
the electrical and
cosmetic features
of this transceiver.
Note:
Before connecting the DC power supply to the transceiver, be
sure to switch the transceiver and the DC power supply off.
2 Do not plug the DC power supply into an AC outlet until you
make al! connections.
3 If the power supply voltage exceeds 18 V, the transceiver
protectIOn circuit will turn the power off automaticalfy. The
transceiver resumes operation automatically when the input
voltage drops to 13.8 V.
9
• Installation example
For a deluxe installation, take the time to install the
transceiver in the mounting bracket. The diagram
offers some mounting suggestions.
Added benefits of using the mounting bracket in your
fixed station include the following:
• You can angle the transceiver for best visibility from
your operating position.
• The transceiver remains stationary when you attach
connectors or use any of the controls.
• The transceiver is quickly detachable from the
bracket if you want to move it to your mobile or any
other alternate operating position.
• The bracket eliminates the risk of anybody bumping
the transceiver off your operating desk.
If you decide to mount the transceiver in a horizontal
plane instead of angling
it up or down, use the top or
middle row of mounting holes on the bracket. The
bottom row
of holes cannot be used to mount the
transceiver horizontally.

1 INSTALLATION AND CONNECTION
ANTENNA CONNECTION
The type of the antenna system, consisting of the
antenna, ground, and feed, will greatly aHect the
successful performance
of the transceiver. Use a
properly adjusted antenna of good quality to letyour
transceiver perform
at its best. Use a good quality 50
ohm coaxial cable and a first quality connector for the
connection. Match the impedance of
the coaxial cable
and antenna so
that the SWR is 1.5:1 or less. All
connections must be clean and tight.
While the transceiver's protection
circuit will activate if
the SWR is greater than 2.5:1, do not rely on
protection to compensate for a poorly functioning
antenna system. High
SWR will cause the transmitter
output to drop, and may lead
to radio frequency
interference to both consumer products (such as
stereo receivers and televisions), and
RF interference
to the transceiver itself. Reports that your signal
is
garbled or distorted, especially at peak modulation,
may indicate that your antenna system
is not eHiciently
radiating the transceiver's power.
If, when you
modulate, you feel a tingle from the transceiver's
cabinet or the microphone's metal fittings, you can be
certain that at the least, your coax connector
is loose
at the rear of the radiO, and at the worst, your antenna
system
is not effiCiently radiating power.
Caution: In a fixed station installatIOn, use a fightning arrester
to prevent fire, electric shock, or damage to the transceIver.
Using the optional auto antenna tuner allows the
transceiver to perform at its very best. For additional
information on the antenna tuner, refer to
,. AUTOMATIC ANTENNA TUNER" on page 48.
GROUND CONNECTION
At the minimum, a good DC ground is required to
prevent such dangers as electric shock. For superior
communications results, a good
RF ground is required,
against which the antenna system can operate. Both
of these conditions can be met by providing a good
earth ground for your station. Bury one
or more
ground rods,
or a large copper plate under the ground,
and connectthis to the transceiver GND terminal. Use
heavy gauge wire or a copper strap,
cut as short as
possible, for this connection. Just as for antenna work,
all connections must be clean and tight.
Caution: DO NOT attempt to use a gas pipe (which is clearly
dangerous), an electrical condUit (which has the whole house
wiring attached and may act like an antenna), or a plastic water
pipe for a ground.
10

1 INSTALLATION AND CONNECTION
ACCESSORY CONNECTIONS
External Speaker
Ensure any external speaker used has an impedance
from 8 to
16 ohms. Use a 3.5mm mono (two
conductor) plug.
Headphones
Use headphones having 4 to 32 ohms impedance.
You can also use stereo headphones. When
·headphones are used,
no sound is heard from the
internal (or optional external) speaker. Use a 3.5mm
mono (two conductor) or stereo (three conductor)
plug.
Microphone
To communicate in the voice modes, connect a
microphone having an impedance of 600 ohms to the
MIC jack. Optional microphones include the MC-43S,
MC-60SS,
MC-SO, and MC-S5. Do not use the MC-44,
MC-44DM, MC-45, MC-45E, MC-45DM or MC-45DME
microphone.
Key or Electronic Keyer
Connect your key or electronic keyer to the KEY jack
on the rear panel. Use a 3.5mm mono (two conductor)
plug.
When using an electronic keyer, ensure the keyer
wiring polarity is correct.
Plug wiring
+7V,
Contact current approximately 1 mA.
~~t ----I::r
GND GND +
11
IF·lOD Interface Connector
The IF-100 Interface is an optional accessory used to
control the TS-50S transceiver from a computer.
The interface connector access hole is located
in the
bottom cover ofthe transceiver. The hole is covered
by a circular protective patch that can be removed
easily by prying up on the patch's edge with a
fingernail. Use care not to scratch the bottom cover if
any tool is used
to remove the patch.
Removing the patch cover exposes the 6-pin male
connector (CN6) to which the IF-100 Interface can be
connected. Refer to the
IF-1OD Instruction Manual for
further information
on using this interface.

2 CONTROLS AND CONNECTORS
FRONT PANEL CONTROLS
CD ®
G) POWER switch
Press momentarily to switch the transceiver on or off.
After
the power is switched on. "HELLO" appears on
the display for one second, followed
by the frequency
and other information such as mode and
VFO A or B.
Note: When you sWitch the DC power supply on, you will not
sWitch the transceiver on. Press the transceiver POWER switch to
control its power.
@ AT TUNE button
Press to activate the optional automatic antenna tuner
(if connected).
The transceiver automatically
checks whether the
antenna tuner is
connected when the power is
switched on. Therefore, be sure
to connect or
disconnect the antenna tuner with the power off.
@ AIPjATT button
Activates the AlP (Advanced Intercept Point) or A IT
(Attenuator) function, or both simultaneously. Initially,
or after a partial or full CPU reset, AlP is
off above 9.5
MHz and on below 9.5 MHz. However, the
default for
A
IT is off on all frequencies. With each press, the
setting changes in sequence.
The status displays
at the LCD top left. (Nothing
displays when both functions are
Off.)
0"'·'·
Oof'"~E ~
o~
AlP helps eliminate radio interference, and moderates
receiver
audio distortion which sometimes occurs
when receiving a strong signal.
ATT attenuates all received signals by 20 dB (1/10) to
moderate interference by strong signals on adjacent
frequencies.
The MC-47 microphone allows separate ATT and AlP
selection. For PF (Programmable Function) key
information, refer to "Programmable Function Keys"
on pages 49 and 50.
@ NB button
Toggles the noise blanker.
The noise blanker attenuates pulse noise, such as that
caused by automobile ignitions or a sparking electric
motor.
For details, refer
to "Noise Blanker" on page 43.
® PHONES jack
Insert the headphones plug into this jack. Any
headphones with an impedance of 4
to 32 ohms,
including stereo headphones, may
be used. Use a
3.5mm mono (two conductor) or stereo (three
conductor) plug.
When using headphones, no sound will be heard from
the internal (or external) speaker.
Note: When connecting headphones, insert the plug straight
into the jack without applying sideways force that could damage
the jack.
12

2 CONTROLS AND CONNECTORS
FRONT PANEL CONTROLS
KENWOOD
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® MIC connector
Connect the microphone securely.
I'J) AF control
Adjusts the receiver audio volume.
Note: The" beep" (audio annunciator) and sidetone levels are
not affected by the position of the AF control.
® SQl control
Turn to just eliminate the background noise when no
signal is present, or
set and forget at full
counterclockwise rotation.
Threshold
AF -0- SQl
(
Noise is heard. Noise disappears.
When
the Squelch control is adjusted correctly, you
will hear sound only when the other station is
transmitting.
The
point at which ambient noise just disappears (the
threshold) depends on the modulation mode and
frequency.
When receiving a
weak signal, turn the control fully
counterclockwise.
Note: If the Squelch control is turned fully clockwise, you may
mistakenly think that receiver sensitivity is low or the transceiver is
fadmg to output sound. Normally, the Squelch control should be
set at the fully counterclockwise position unless in the FM or AM
mode.
13
® RIT control
The Receiver Incremental Tuning control has two
functions:
• Receiver frequency shift
• Scan speed change
(1) Receiver frequency shift
With the RIT on,
the receiver frequency is
adjustable
without affecting the transmitter
frequency. Turn
the RIT control clockwise, and the
frequency will
shift up.
For details, refer
to "RIT Operation" on page 41.
(2) Scan speed change
Using the RIT control. the scan speed can be
changed during memory or program scan. Turn
the RIT control counterclockwise, and the scan
speed will increase. When exiting scan, center the
RIT control.
For details, refer to page 40.
Note: Remember that the RIT control affects both the receiver
frequency shift, and scan speed.
If you switch the RIT on after
using the scan, the receiver frequency may be shifted.
@ IF SHIFT control
Allows shifting of an interfering signal outside the filter
pass band to reduce or eliminate the adjacent signal
interference.
Normally, set the control to the center (detent)
position.
For details, refer to "IF Shift'· on page 43.
Note: The IF SHIFT control functions In the SSB and CW
modes, and does not function in the AM and FM modes.

@ RIT button
Toggles the Receive Incremental Tuning function. The
RIT control adjusts the receiver frequency without
affecting the transmitter frequency.
For RIT operation, refer to page 41.
@ SCAN button
This button provides three functions:
• Memory scan start
• Program scan start
.Scan stop
For Memory scan, refer to page 37. For Program scan,
refer
to page 39.
(1) Memory scan start
Press the
SCAN button in the Memory Channel
mode to scan the memory channels.
(2) Program scan start
Press the
SCAN button in the VFO mode, and the
transceiver scans within the range you have preset
and stored in memory channel 99. If nothing has
been preset
in memory channel 99, scan ascends
from the displayed frequency and scans the range
from 30 kHz to 29.999.9 MHz.
(3) Memory or program scan stop
Press the SCAN, CLR or microphone PTT button
to stop scan.
@ CLR button
The CLR button provides six functions, depending on
how you are operating:
• Memory or program scan stop
• Memory Scroll mode exit
• Memory channel lock-out
• Memory channel clear
• Menu Set-up exit
• Automatic Power Off reset
(1) Memory or program scan stop
Press the CLR button to stop Memory or Program
scan.
For Memory scan, refer to page 37. For Program
scan, refer to page 39.
(2) Memory Scroll mode exit
Press the CLR button to exit the Memory Scroll
mode.
(3) Memory channel lock-out
During Memory scan, loaded channels can be
skipped
without erasing their contents. For details,
refer to page 38.
Note: Press the CLR button for more than 2 seconds to
erase the contents of a memory channel.
2 CONTROLS AND CONNECTORS
(4) Memory channel clear
A memory channel
which contains unwanted data
can be cleared. Select the memory channel to be
cleared and press the
CLR button for more than 2
seconds.
If you have set Memory Protect 1or 2 on, you
cannot clear memory channels. For details, refer
to page 34.
(5) Menu Set-up exit
Press the CLR button to exit from the Menu Set-
up mode, and return to the previous mode. For
Menu Set-up functions, refer to pages 46 and 47.
(6) Automatic Power Off reset
Press the CLR button to reset the Automatic
Power Off function. (If you do not operate any of
the transceiver's controls for approximately
180
minutes, the power is automatically switched off.)
For details, refer to page 42.
@ M.IN button
This button provides these two functions:
• Memory channel storage
• Memory Scroll mode
(1) Memory channel storage
In the VFO or Memory Channel mode, stores the
currently displayed
data (e.g. frequency,
modulation mode) into a memory channel.
For
details, refer to page 31.
(2) Memory Scroll mode
Press the M.IN button to enter the Scroll mode,
and select a memory channel with the UP or
DOWN button.
For details, refer to page 33.
@ M>V button
Transfers the currently displayed memory contents
(frequency, modulation mode, etc.) to the
VFO.
For details, refer to "MEMORY TRANSFER" on page
33.
@ M/V button
Switches the transceiver between the VFO and
Memory Channel modes.
In the VFO mode, either A
VFO or VFO B will appear at the display top center,
depending on the last VFO used. When the Memory
Channel mode is selected, M.CH appears
at the
display left.
14

2 CONTROLS AND CONNECTORS
® ON AIR indicator
Lights when the transceiver is both in the transmit
mode and tuned
to a frequency within a transmit band.
Transmission is only possible within specific bands
of
frequencies; however, reception is possible on all
frequencies tuned by the transceiver. If the
microphone
PIT switch is pressed while tuned to a
frequency outside a transmit band, no signal can be
transmitted. The
PIT must be released first, a
frequency tuned within a transmit band, and the
PIT
pressed again before transmission is possible.
@ AT TUNE indicator
Lights during preset or tuning of the optional automatic
antenna tuner (AT-50 or AT-300). The
LED goes off
when tuning is finished.
® F.LOCK button
Locks or unlocks the tuning control and these buttons:
eA/B
eA=S
eCLR
eDOWN
eFM/AM
eM.IN
eM/V
eM>V
eMHz
eSCAN
eSPLIT
esss/cw
eup
eNS
Press this button momentarily, and "F.lOCK" appears
on the display top right, to indicate that lock is on.
Release lock by again pressing the button.
Note: When the F.LOCK button is depressed for more than
two seconds, the transceiver will enter the Menu Set-up mode.
Then the button will not function as the F.LOCK button. For the
Menu Set-up mode. refer to pages
46 and 47.
15
@ @
@ MHz button
~HI--@
IGHI--@
-l\1l-@
"""*~-®
Toggles the function of the UP and DOWN buttons.
The "1 MHz" indicator appears at the top right ofthe
LCD to indicate status.
Switch the MHz button on:
In the VFO mode, to change the operating frequency
in 1 MHz steps (1 MHz on).
In the Memory Channel mode. to select either from
on
Iy loaded memory channels (on), or from all memory
channels (off). For details, refer to "QUICK MEMORY
CHANNEL SELECT"" on page 36.
In the MemoryScroll mode, to select only from empty
memory channels. For details, refer
to "QUICK
MEMORY CHANNEL
SELECT"" on page 36.
® UP and DOWN buttons
The UP and DOWN buttons have these five functions:
e Amateur band select
e Frequency up or down in 1MHz steps
e Memory channel select
e Menu setting select
e Start and end frequency recall (when memory
channel
99 is selected)
(1) Amateur band select
In the VFO mode, with the 1MHz indicator oft,
step through the Amateur bands.
Press the
UP button, and the next higher band will
be selected. Select the next lower band by
pressing the
DOWN button. Hold down either
button for rapid change.
(2) Frequency up or down in 1MHz steps
In the VFO mode, with the 1MHz indicator on,
step the frequency up
or down in 1MHz steps.
Press the UP button to increase, or
the DOWN
button to decrease the frequency. Hold down
either button for rapid change.
Note: The frequency step may be changed from 1 MHz
to 500 kHz. For details, refer to Menu Set·up (Menu B, No.
62) on page 47.

(3) Memory channel select
In the Memory Channel or Memory Scroll mode,
select a memory channel with the UP or
DOWN
button.
Press the UP button to select the next higher
memory channel, or the
DOWN button for the next
lower memory channel.
Hold down either button for rapid change.
For details, refer to page 33.
(4) Menu setting select
Change the settings of Menu items using the UP
or
DOWN button. With each button press, the
transceiver steps through the available selections.
For details, refer to Menu Set-up
on pages 46 and
47.
Hold down either button for rapid change.
(5) Start and end frequency recall
In the Memory Channel mode, switch the display
between the program scan start and end
frequencies when memory channel
99 is selected.
For example, to display the scan end frequency,
press the
r.lOCK button, then the UP button to
see the end frequency. Then, press the
DOWN
button to switch to the start frequency. For details,
refer to page 38.
@ Tuning control
The tuning control provides two functions:
• Frequency change
• Menu number select
The turning torque can be adiusted by using the drag
control lever located at the bottom of the tuning
control. Move the lever
to the leftto decrease drag, or
to
the right to increase drag.
(1) Frequency change
In the vro mode, turn the tuning control to
change the operating frequency.
Fuzzy logic
control
The frequency step changes automatically,
depending
on howfast the control is turned. At the
slowest turning speed.
the minimum step is 5 Hz.
The frequency step during rapid tuning can be up
to 200
Hz. In the FM mode, the range is from
50 Hz to 2 kHz.
(2) Menu number select
In the Menu Set-up mode, choose the menu
number with the tuning control.
For Menu Set-up, refer to pages
46 and 47.
2 CONTROLS AND CONNECTORS
@ AlB button
Provides three functions, depending upon current
operation:
• A VFO or VFO B select
• Transceiver Partial reset
• Menu Aor Menu B select
(For Menu Set-up, refer to pages
46 and 47.)
(1) A VFO or VFO B select
In the VFO mode, select either A or B as the
active VFO. Either A VFO or VFO Bappears at
the display
top center.
(2) Transceiver Partial reset
If the transceiver will not respond to its controls,
you may restore normal operation with the AlB
button.
With the power supply on, and the transceiver
power off, hold down the AlB button and switch
the transceiver power
on.
Note: If the transceiver still does not function properly,
do a ful! reset using the A:::B button. Full reset is described
later.
For details, refer to "MICROPROCESSOR
RESET" on page 45.
® SPLIT button
Permits use ofthe alternate (unused) VFO for the
transmit frequency.
Press this button, and the SPLIT indicator will appear
at
the display top center to show that the alternate
VFO will be used for the transmit frequency.
With the SPLIT button
on, switch the F,lOCK on to
activate the TF·SET function.
For split-frequency and TF·SET function details, refer
to page 30.
@ A=Bbutton
This button provides two functions:
.A=B (equalize)
• Transceiver Full reset
(1) A=B
In the VFO mode, copy the contents of the active
VFO to the inactive (alternate) VFO.
(2) Transceiver Full reset
All user specified data (memory channels and
Menu items) will be initialized (reset to the factory
defaults).
16

2 CONTROLS AND CONNECTORS
With the power supply on, and the transceiver
power off, hold down the
A=B button, and switch
the transceiver power on. Refer to
"MICROPROCESSOR RESET" on page 45.
@ SSB/CW button
Switches the transceiver between SSB and CW
modes, with a choice of two setup configurations.
Switch
to other modulation modes only while in
receive mode.
.By setting Menu
A, No. 04, you can select either two-
step switching (the default, which is the conventional
SSB mode forthe selected Amateur band, and CW) or
three-step switching (USB, LSB, and
CW).
For details, refer to Menu Set-up (Menu A, No. 04) on
page 46.
A Two-step switching:
Press the SSB/CW button, and switch between
SSBand CWo
LSB/USB Auto Select
In the SSB mode, the transceiver automatically
selects USB or LSB, depending upon whether the
operating frequency
is higher or lower than 9.5
MHz.
By convention, LSB
is used for the 1.8 MHz
through 7 MHz bands, and USB is used
for the
14 MHz and higher bands.
B Three-step switching:
Press the SSB/CW button, and step through USB,
LSB, and
CWo
Note: In the Memory Channel mode, if the modulation mode is
changed after selecting a channel, the change IS temporary, and
the previous data in that channel remains unchanged. However, if
the mode is changed with memory channel 99 selected. the
previous data is overwritten in memory channel 99.
@ FM/AM button
Toggles the transceiver between FM and AM. Switch
to other modulation modes only while in receive mode.
Note: In the Memory Channel mode, if the modulation mode
IS changed after selecting a Channel, the change is temporary.
and the prevlows data in that channel remains unchanged.
However.
if the mode is changed with memory channel 99
selected. the prevIOus data is overwritten in memory channel 99.
17

2 CONTROLS AND CONNECTORS
REAR PANEL CONNECTORS
CD ALC
Input for an external ALC signal from a linear amplifier.
Requires a standard audio (phono) plug.
@ RELAY
During transmit, used to key a linear amplifier by
providing a switch to ground from a built-in relay.
Requires a standard audio (phono) plug.
@ ANT
Connect to an external antenna, an antenna tuner, or a
dummy load. Use a 50 ohm HF antenna and feed
system, with a PL-259
(M type) coaxial connector.
@ KEY
Connect a key for CW operation. Use a 3.5 mm
diameter plug.
Turn the transceiver power off before inserting the
plug.
The transceiver will momentarily transmit if the key is
inserted with the power on.
® EXTSP
Connect an optional external speaker, using a 3.5 mm
diameter plug. This will disconnect the internal
speaker.
® Power Input DC 13.8 V
Connect to a13.8 V DC supply to power the
transceiver. Use the supplied DC cable. This
transceiver draws less than 20.5 A (with an automatic
antenna tuner, less than 22.5 AI
at maximum
transm
iller output.
@)
(F'
(j) ACC
Connect the optional automatic antenna tuner (AT-50
or AT-300). For details, refer to "AUTOMATIC
ANTENNA TUNER" on page 48.
® GND
Connect a heavy gauge wire or copper strap between
the ground terminal and the nearest earth ground.
Do
not connect the ground wire to either your house
electrical wiring, or gas or water pipes. A well
grounded transceiver will reduce the risk of
interference to television or broadcast radio receivers.
It can also reduce receiver noise caused by static
discharges.
18

2 CONTROLS AND CONNECTORS
DISPLAY
G) ,~ @ ® ® ®
MENU AlP ATT NB A VFO B SPLIT
@
@
CI CI CI
='--"'=) L1. L1. L1.
S13579204060dB
@-;--IIIIIIIIIIIIIIIIIIIIIIIIIIIIII '
RF 2 4 6 8 10
@ @
(j) MENU
Appears when entering the MENU Set-up mode.
@ AlP
Appears when the Advanced Intercept Point function
is selected with theAIP/ATTbutton. -
@ ATT
Appears when the ATTenuator is selected with the
AIP/ATT button. -
® NB
Appears when the ~oise IJlanker is on.
® AVFO B
Either A VFO or VFO B appears, depending on which
VFO is selected with the A/B button.
® SPLIT
Appears when the SPLIT frequency function is on.
o FAST/SLOW
Either FAST or SLOW appears, depending on which
AGC speed is selected.
(No indicator appears in the
FM mode.)
® F.LOCK
Appears when the frequency LOCK function is on.
19
@
@)
FAST SLOW F.LOCK 1MHz
,-~R~IT~;::::~t- '3:
_ 00
kHz 1..1. D. kHz
'JJ;
® IMHz
Appears when the MHz function is on. Also appears in
the Memory Channel mode when selecting from only
programmed channels, or the Memory Scroll mode
when choosing empty memory channels.
@) M.CH
Appears after switching to the Memory CHannel mode
using
the M/V button.
@ Memory channel display
Displays the selected memory channel number.
@ Dot
Appears when memory channels are locked-out. Refer
to Memory Channel Lock-out,
on page 38.
@ Digital frequency display
Displays the operating frequency.
@ RIT
Appears when ~eceiver !ncremental luning is on.
@ Digital RIT display
Displays the amount of frequency shift with the RIT
on, the scan speed value during scan, or the one and
ten Hertz frequency digits when using the MC-47.

@ Meter
Appears as the Peak Hold S meter (S1 to 60 dB)
during reception, and as
the Peak Hold RF meter (to
10) during transmission. The peak hold characteristic
can be disabled by menu selection if required.
The
RF meter also can deflect times lou r (4X) when
low power is selected. For details, refer to "Menu Set-
up" (Menu
A, No.14 and Menu B, No.55) on pages 46
and
47.
@ BUSY
Appears when the squelch is opened, either by the
SQL control, or by a received signal.
@ AT
Appears when an optional Automatic j\ntenna :runer
(AT-50 or AT-300) is connected. When using the
AT-
50, this indicator appears when the AUTO/THRU
switch on the tuner is
in the AUTO position.
@ M/L
Appears when ~edium or !-owtransmitter output
power is selected using the Menu Set-up.
No
designator indicates lull power.
® M.SCR/PRG/SCAN
Appears when the MIN button is pressed to activate
the
~emory SCRoll function. PR.@ appears after
selecting memory channel 99. PRG and SCAN both
appear during program scan.
SCAN appears during
memory scan.
® -N
Appears when an optional /liarrow filter is selected
using the Menu Set-up. For details, refer to "IF Filter"
on page 43.
@ LSB/USB/CW/FM/AM
A modulation mode appears depending upon which
you select using the SSB/CW
or FM/ AM button.
® TONE
Appears when either the burst, Or continuous
subaudible
TONE for 10 meter operation is on. Both
the
FM mode and SPLIT transmit/receive operation
must
be selected to use the tone encoder.
2 CONTROLS AND CONNECTORS
20