Kenwood TK-481 Transceiver
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Modelo:
TK-481
Data:
2001
Categoria:
Grupo:
Descrição:
900MHz FM TRANSCEIVER
Informação
General
Frequency Range
RX .........................................................
TK-480 : 851 to 870MHz TK-481 : 935 to 941MHz
TX .........................................................
TK-480 : 806 to 825MHz (851 to 870MHz : Talk-Around)
TK-481 : 896 to 902MHz (935 to 941MHz : Talk-Around)
Systems ....................................................
Maximum 32
Groups
......................................................
Maximum 250
Conventional Channels ............................. Maximum 600
Channel Spacing .......................................
TK-480 : 25kHz (PLL channel step 12.5kHz)
TK-481 : 12.5kHz (PLL channel step 12.5kHz)
Battery Voltage ......................................... DC
7.5V
Battery Life ...............................................
More than 8 hours at 5-5-90 duty cycle with KNB-16A battery
Temperature Range .................................. –30°C
to +60°C (–22°F to +140°F)
Dimensions and Weight
With KNB-16A (1100mAh battery) ...... 135 (5.33) H x 58
(2.29) W x 34 (1.34) D mm (inch) 1.01lbs (460g)
(Dimensions not including protrusions, weight includes
Antenna and belt hook)
Receiver (Measurements made per TIA/EIA-603)
RF Input Impedance ................................. 50Ω
Sensitivity
12dB SINAD* ....................................... 0.30μV
Selectivity* ...............................................
TK-480 : 70dB±25kHz TK-481 : 63dB±12.5kHz
Intermodulation* ......................................
TK-480 : 65dB±25/50kHz TK-481 : 60dB±12.5/25kHz
Spurious (Except for IF 1/2)* .................... 70dB
Frequency Stability ...................................
TK-480 : ±0.00025% (–30°C to +60°C)
TK-481 : ±0.00015% (–30°C to +60°C)
Channel Spread.........................................
TK-480 : 19MHz TK-481 : 6MHz
Audio Power Output ................................. 500mW
at 16Ω less than 5% distortion
* : Typical specifications
Transmitter (Measurements made per TIA/EIA-603)
RF Power Output
High ...................................................... 2.5W
Low ...................................................... 1W
RF Output Impedance .............................. 50Ω
Spurious
.................................................... –60dB
Modulation ................................................
TK-480 : 16K0F3E, 16K0F1D, 15K0F2D, 14K0F3E, 14K0F1D, 13K0F2D
TK-481 : 11K0F3E, 11K0F1D, 10K5F2D
FM Noise ..................................................
TK-480 : –45dB TK-481 : –40dB
Audio Distortion ........................................
5.0% or less
Frequency Stability ...................................
TK-480 : ±0.00025% (–30°C to +60°C)
TK-481 : ±0.00015% (–30°C to +60°C)
Channel Spread.........................................
TK-480 : 64MHz TK-481 : 45MHz
Tipo de manual:
Manual de serviço
Páginas:
54
Tamanho:
2.83 Mbytes (2969463 Bytes)
Idioma:
english
Revisão:
Revised II
ID de manual:
B51-8408-20 (N) 1015
Data:
2001 03 01
Qualidade:
Documento eletrônico, digitalização, bem legível.
Data de upload:
2017 01 01
MD5:
ad1aa1db4617cadf6e9d1d918457f124
Downloads:
1046
Informação
This service manual applies to products with 30100001 or
subsequent serial numbers.
GENERAL
... 2
SYSTEM SET-UP ... 2
OPERATING FEATURES ... 3
REALIGNMENT ... 11
CIRCUIT DESCRIPTION ... 14
SEMICONDUCTOR DATA ... 20
DESCRIPTION OF COMPONENTS ... 23
PARTS
LIST ... 24
EXPLODED VIEW ... 30
PACKING
... 31
ADJUSTMENT ... 32
TERMINAL FUNCTION ... 40
PC BOARD VIEWS
DISPLAY UNIT (X54-3210-XX) ... 41
TX-RX UNIT (X57-5630-XX) ... 47
SCHEMATIC DIAGRAM ... 53
BLOCK DIAGRAM ... 57
LEVEL DIAGRAM (TK-480, ... 59
LEVEL DIAGRAM (TK-481, ... 60
KNB-16A/17A (Ni-Cd BATTERY) ... 61
KPG-36 (PROGRAMMING INTERFACE CABLE) ... 61
KSC-19 (CHARGER) ... 61
SPECIFICATIONS ... 62