GENERAL Frequency range ....................................... 450~490MHz (K,K4) 440~480MHz (M) 400~430MHz (K3,K6,M3) Number of channels .................................. Zone : Max. 128 per radio Conv. Ch : Max. 128 per zone TK-3173 Trunking GID : Max. 250 per zone Channel spacing ........................................ Wide : 25kHz Narrow : 12.5kHz Battery voltage .......................................... 7.5V DC ±20% Battery life (5-5-90 duty cycle)/Approx. hours KNB-24L (1400mAh) .............................. 9 KNB-25A (1200mAh) ............................. 8 KNB-26N (2000mAh) ............................. 12 KNB-35L (1950mAh) .............................. 11 Operating temperature range.................... –22°F~+140°F (–30°C~+60°C) Frequency stability .................................... ±0.00025% (–22°F~+140°F) Antenna impedance .................................. 50Ω Channel frequency spread ........................ 40MHz (K,K4,M) 30MHz (K3,K6,M3) Dimensions (W x H x D) ............................ 2-7/32 x 4-9/32 x 1-1/4 in. (56 x 109 x 31.7 mm) with KNB-24L or 35L battery (Projections not included) 2-7/32 x 4-9/32 x 1-1/2 in. (56 x 109 x 37.9 mm) with KNB-25A or 26N battery Weight (net) .............................................. 12.0 oz. (340 g) with battery (KNB-35L) Antenna (KRA-23) and beltclip (KBH-12) Receiver (Measurements made per EIA/TIA-603) Sensitivity (12dB SINAD) ........................... Wide : 0.25μV Narrow : 0.28μV Selectivity .................................................. Wide : 70dB Narrow : 65dB Intermodulation distortion ......................... Wide : 65dB Narrow : 60dB Spurious response .................................... 65dB Audio output (8Ω impedance) ................... 500mW with less than 10% distortion Transmitter (Measurements made per EIA/TIA-603) RF power output ....................................... HI : 4W LO : 1W Spurious response .................................... 70dB Modulation ................................................ Wide : 16K0F3E Narrow : 11K0F3E FM hum & noise ....................................... Wide : 45dB Narrow : 43dB Audio distortion ......................................... W/N : Less than 5%