Kenwood TKR-740, TKR-840 User Manual

VHF/UHF FM Repeater-Base Units

TKR-740/840

High-performance features, repeater mode, 32 channel simplex/full-duplex base mode,

flash memory,DSP-based tone decoding,PC programmability, PC tuning, interface ports, test ports

and programmable auxiliary ports make Kenwood’s Systems utilizing the embedded TKR-740/840

receiver-exciter units the first choice for demanding industrial and public service applications.

32 CHANNEL SIMPLEX/FULL-DUPLEX BASE MODE &
PRIORITY SCAN

The 32 channel simplex/full-duplex base mode provides
a perfect platform for high-end conventional base station
systems. The priority scan capability permits multiple channel
usage full-time or on command while monitoring a primary
dispatch channel. The remote control and programmable
ports permit full dispatch console access to all base station
controls and functions. The front panel programmable
function-keys (PF keys) with status LED’s provide full
equipment room/on-site control and can be concealed and/
or disabled all together. The two-digit LED display provides
channel display,operational status,programming status and
fault indications.

REPEAT MODE & INTERNAL CONTROLLER

The TKR-740/840 repeater systems posses all the remote
control, programmability and site control attributes as in base
mode. Front panel PF key functions as Takeover (remote
disable),TX Disable and Repeat On/Off can be assigned for
site setup and maintenance use.

The internal conventional repeater mode supports up to 16
user groups (16 QT/DQT) using Digital Signal Processing tech­niques. This also supports the traditional CW-ID,time-out
timer, hang time,reverse burst squelch tail elimination,etc.,
repeater operations. The internal controller can be bypassed
and an external conventional or trunking logic controller
option used in its place.

MULTI-TONE/CODE TABLES & DSP PROCESSING

There are 16 programmable multi-tone/code tables each with
16 QT/DQT tone/code pairs that can be assigned on
a per channel basis. This provides multi-channel base
stations up to 16 users groups per channel. This feature can
also be used for fail-safe standby base or repeater units that
can be activated into use in the even of a system failure
(additional fail-safe systems engineering and
components required).

LOW PROFILE DESIGN AND DIE-CAST CHASSIS

The low profile design saves site rack for other system
components on multi-channel base systems and repeaters.
The all metal encased panels and die-cast chassis with
integrated heat sink are key to the TKR-740/840’s durability,
superior service level and reduced weight. The unit is sealed
to provide long-term protection from dust, moisture and for­eign ingress even in the most abusive operating conditions.

AUXILIARY MACRO PORTS

The 25-pin D-Sub controller interface port also provides six
AUX Outputs and three AUX Inputs. The AUX Outputs are soft­ware programmable with functions such as PLL unlock,
transmit sense,supply voltage sense,RSSI, exciter tempera­ture,etc.,for site monitoring equipment and backup power and
environmental systems. These AUX Outputs are programmable
for active high or low and can be controlled by the AUX Input
ports using signals from remote console termination panels
or site control equipment. The AUX Inputs are programmable
active high or low and can be programmed for any front panel
PF function, perform direct channel access or AUX Output port
control (turned on, turned off or toggled on/off the AUX output).
Each AUX input has a “macro”capability and can control up
to three AUX Output ports simultaneously. The 12-pin accessory
connector has 5 macro-capable AUX I/O ports that are
programmable for either AUX Input or Output functions.

CONTINUOUS DUTY/HIGH STABILITY RF POWER OUTPUT

The 100% duty cycle,1.5 PPM high stability RF power output
is continuously adjustable from a 100 mw to 5 W. The filtered
impedance-matched output is the heart of the TKR-7400/8400
Series systems as the exciter stage for high-power systems or
for direct output low power applications.

FLASH MEMORY ADVANTAGE

Flash memory permits updates, advanced feature sets and
system architectural changes to be made electronically without
ever opening the unit. This means faster modifications for
system operators and less downtime for users.

LED INDICATORS

The LED indicators provide clear
system status information at a
glance,including transmit, receive, external standard input and
power. If the transmitter or receiver synthesizer become
unlocked,the LEDs flash for quick problem assessment.

WIDE/NARROW CHANNEL SPACING

The TKR-740/840 are programmable for wide/narrow channel
spacing* on a per channel basis [TKR-740: 25 (30) kHz wide/

12.5 (15) kHz narrow; TKR-840:25 kHz wide /12.5 kHz
narrow]. The enhanced synthesizer PLL channel step
programmability accommodates channel allocations now and
in the future.

*Both models operate with no less than 25 kHz wide and 12.5 kHz narrow channel
bandwidth.

PC PROGRAMMING AND TUNING

The TKR-740/840 can be programmed/tuned quickly and effi­ciently without ever opening the case. Programming/tuning
can be done though front panel microphone/handset jack with
the KPG-47D software,KPG-46 interface cable,and any PC­compatible computer. The same can also be done via the rear
panel 25-pin connector. The PC tuning parameters available
are shown below:

❚ Squelch (Analog/RSSI)
❚ RX audio signal output (RA)
❚ RX detector signal output (RD)
❚ RF output power
❚ Maximum Deviation
❚TX audio input (TA)
❚ Remote TX audio input (RTA)

Manual tuning is available for the following settings:RX
helical resonator block bandwidth, MCF waveform, Quad
detector coil, and MIC sensitivity.

EXTERNAL REFERENCE INPUT

The internal oscillator already provides an excellent ± 1.5
PPM stability figure,but for more demanding applications
such as simulcast or paging systems, you can inject an exter­nal oscillator standard to obtain a much higher stability factor.
The “REF”LED on the front panel changes from green to red
when the external signal is applied.

LOCAL SPEAKER & MICROPHONE/TEST SWITCH

The built-in front panel speaker provides excellent audio for
on-site monitoring and can be controlled via the volume
on/off knob. The TEST switch allows you to activate the trans­mitter and the supplied hand microphone for air checks and
the Intercom function.

OTHER FEATURES

❚ COMPANDED AUDIO
❚ EIGHT CW MESSAGE MEMORIES
❚VOTER TONE GENERATION
❚ DIGITAL PAGING ENCODER INPUT

(bi-level type; e.g. POCSAG)

❚VOICE SCRAMBLER PORT/CONTROL

❚ Signaling Deviation (TD)
❚ Signaling balance
❚ QT deviation
❚ DQT deviation
❚Test tone deviation
❚ CW ID deviation
❚ Repeat gain
❚Voting tone level
❚ Digital pager shift level
❚ Digital pager wave balance

Options

.

C

E

R

T

I

F

I

E

D

TKR-740 TKR-840

GENERAL

R
X

Type 1: 146 ~ 162 MHz
Type 2: 158 ~ 174 MHz
Type 3: 136 ~ 150 MHz

R
X

Type 1: 450 ~ 480 MHz
Type 2: 480 ~ 512 MHz
Type 3: 400 ~ 430 MHz

Frequency Range

T
X

Type 1: 136 – 174 MHz
Type 2: 136 – 174 MHz
Type 3: 136 – 174 MHz

T
X

Type 1: 450 ~ 480 MHz
Type 2: 480 ~ 512 MHz

Type 3: 400 ~ 430 MHz
Number of Channels 32
Channel Spacing 30, 25 kHz (wide)

15, 12.5 kHz (narrow)
(PLL channel stepping 2.5 ,
5, 6.25 kHz)

25 kHz (wide)

12.5 kHz (narrow)
(PLL channel stepping 5,

6.25 kHz)
Operating Voltage 13.8 V DC ±15%
Current Drain

Standby
Receive
Transmit/Rece ive

Less than 1.0 A
Less than 1.5 A

Less than 3.5 A
Duty Cycle Receive: 100%, Transmit: 100%
Frequency Stability ±0.00015% (-22¡ F ~ +140¡ F)
Operating Temperature

Range

-22¡ F ~ +140¡ F

(-30¡ C ~ +60¡ C)
Dimensions (W x H x D) 19 x 1-3/4 x 12 in. (483 x 44 x 305 mm)
Weight (net) 8.8 lbs. (4kg)
FCC ID Type 1: ALH30633110

Type 2: ALH30633120
Type 3: ALH30633130

Type 1: ALH30643110
Type 2: ALH30643120
Type 3: ALH30643130

FCC Compliance Type 1: 22, 74, 90

Type 2: 90
Type 3: 90

Type 1: 22, 74, 90, 95
Type 2: 90
Type 3: 90

CANADA IC (RSS119) Type 1: 282195598A

Type 2: 282195598A
Type 3: 282195598A

Type 1: 282195600A
Type 2: None
Type 3: 282195600A

TKR-740 TKR-840

RECEIVER (Measurements made per EIA /TIA-204-D)

Antenna Impeda nce 50 W
Sensitivity:

12 dB SINAD
20 dB quieting

0.3 µV

0.4 µV

Selectivity 95 dB at ±30 kHz (wide)

89 dB at ±15 kHz (narrow)
87 dB at ±12.5 kHz (narrow)

90 dB at ±25 kHz (wide)
82 dB at ±15 kHz (narrow)

Intermodulation 90 dB at ±30, 60 kHz (wide)

85 dB at ±15, 30 kHz
(narrow)

85 dB at ±25, 50 kHz (wide)
80 dB at ±12.5, 25 kHz
(narrow)

FM Hum & Noise 60 dB (wide)

55 dB (narrow)
Audio Output (Ext. Speaker) 4 W (at 4 W, less than 5% distortion)
Spurious & Image Rejection 100 dB
Audio Distortion (Ext.

Speaker)

Less than 2% at 1000 Hz

Band Spread Type 1: 3 MHz

Type 2: 3 MHz
Type 3: 3 MHz

Type 1: 5 MHz
Type 2: 5 MHz
Type 3: 5 MHz

TKR-740 TKR-840

TRANSMITTER (Measurements made per EIA-152-C)

RF Power Output 5 W adjustable to 0.1 watts
Antenna Impedance 50 W
Type of Emission 16KØF3E (wide)

11KØF3E (narrow)
Spurious & Response 70 dB 70 dB (60 dB at 100 mW)
FM Hum & Noise 55 dB (wide)

50 dB (narrow)
Microphone Impedance 600 W
Audio Distortion Less than 0.5% at 1000 Hz Less than 1% at 1000 Hz
Band Spread Type 1: 38 MHz

Type 2: 38 MHz
Type 3: 38 MHz

Type 1: 30 MHz
Type 2: 32 MHz
Type 3: 30 MHz

TKR-740 TKR-840

REPEATER CONTROL (Measurements made per TIA/EIA-603)

Signaling (simultaneously)

Maximum number of
tones

16

QT decoder/encoder

Tone frequency
Response time
Squelch tail elimination
time
Encoder frequency error
Sensitivity

67.0-210.7Hz (0.1 Hz step)
250 ms or less

140 to 200 m s

±0.3% or less

SINAD 8 dB or less

DQT decoder/ encoder

DQT code
Decoder response time

Turn-off code
transmission time
Sensitivity

23 bits total: a 3-digit octal number (0-7,12 bits) with error

correction (11 bits)

250 ms or less
140 to 200 ms

SINAD 8 dB or less
Time-out timer Off - 30 min.
Repeater hold time Off - 10 sec.

TKR-740 TKR-840

EXTERNAL CONTROL

CW ID

Maximum modulation
CW tone frequency
Morse code speed
Maximum character
memory

Maximum deviation of 40% ±10%

400 Hz to 2000 Hz, (default 800 Hz)

5 to 30 word per minute, (default 20 WPM)

Up to 20 characters

CW Massage

Maximum character
Number of bank

Up to 20 characters per bank

8 banks

Test tone

Maximum modulation
Test tone frequency

Maximum deviation of 60%

300 Hz to 3000 Hz (default 1000 Hz)

Voting pilot tone

Tone frequency
Output level (RA terminal)

1950 Hz, 2175 Hz, 2700 Hz, (default 1950 Hz)

400 mVrms at 1950 Hz

Kenwood follows a policy of continuous advancement in development.
For this reason specifications may be changed without notice.

KMC-27A

Microphone (with Noise Canceling)

KMC-27B

Microphone (supplied
mobile-style hand mic. with hanger)

Specifications

14-6, 1-chome, Dogenzaka, Shibuya-ku, Tokyo 150-8501, Japan

P.O. BOX 22745, 2201 East Dominguez St., Long Beach, CA 90801-5745, U.S.A

6070 Kestrel Road, Mississauga, Ontario, Canada L5T 1S8

KMC-9C

Desktop Microphone

* Not all accessories may be available, please contact dealers for details.

KES-4

External Speaker

This has been printed on recycled paper.

CL280KP-E-2(00) 991203B Printed in Japan