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