Specifications - Kenwood FM Transceiver TK-481 Service Manual

TK-480/481
General
Frequency Range
RX ......................................................... TK-480 : 851 to 870MHz
TX ......................................................... TK-480 : 806 to 825MHz (851 to 870MHz : Talk-Around)
Systems .................................................... Maximum 32
Groups ...................................................... Maximum 250
Conventional Channels ............................. Maximum 600
Channel Spacing ....................................... TK-480 : 25kHz (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)
(Dimensions not including protrusions, weight includes antenna and belt hook)
Receiver
(Measurements made per TIA/EIA-603)
RF Input Impedance ................................. 50
Sensitivity
12dB SINAD* ....................................... 0.30 V
Selectivity* ............................................... TK-480 : 70dB 25kHz
Intermodulation* ...................................... TK-480 : 65dB 25/50kHz
Spurious (Except for IF 1/2)* .................... 70dB
Frequency Stability ................................... TK-480 : 0.00025% (–30 C to +60 C)
Channel Spread ......................................... TK-480 : 19MHz
Audio Power Output ................................. 500mW at 16
* : Typical specifications
Transmitter
(Measurements made per TIA/EIA-603)
RF Power Output
High ...................................................... 2.5W
Low ...................................................... 1W
RF Output Impedance .............................. 50
Spurious .................................................... –60dB
Modulation ................................................ TK-480 : 16K0F3E, 16K0F1D, 15K0F2D, 14K0F3E, 14K0F1D, 13K0F2D
FM Noise .................................................. TK-480 : –45dB
Audio Distortion ........................................ 5.0% or less
Frequency Stability ................................... TK-480 : 0.00025% (–30 C to +60 C)
Channel Spread ......................................... TK-480 : 64MHz
62

SPECIFICATIONS

TK-481 : 896 to 902MHz (935 to 941MHz : Talk-Around)
TK-481 : 12.5kHz (PLL channel step 12.5kHz)
TK-481 : 63dB 12.5kHz
TK-481 : 0.00015% (–30 C to +60 C)
TK-481 : 6MHz
less than 5% distortion
TK-481 : 11K0F3E, 11K0F1D, 10K5F2D
TK-481 : –40dB
TK-481 : 0.00015% (–30 C to +60 C)
TK-481 : 45MHz
TK-481 : 935 to 941MHz
1.01lbs (460g)
TK-481 : 60dB 12.5/25kHz