General Frequency Range............................................................. 450~470MHz (K) 470~490MHz (K2) Systems ........................................................................... Max. 32 Groups ............................................................................. Max. 250 (Case of 1 system) Channels .......................................................................... Max. 600 Channel Spacing .............................................................. 25kHz (Wide) 12.5kHz (Narrow) PLL channel stepping ...................................................... 5kHz, 6.25kHz Operating Voltage ............................................................ 7.5 VDC ±20% Battery Life ....................................................................... More than 4 hours at 4 watts (5-5-90 duty cycle with KNB-14 battery) More than 8 hours at 4 watts (5-5-90 duty cycle with KNB-15A battery) Operating Temperature range.......................................... -30°C to +60°C (-22 °F to +140 °F) Dimensions and Weight With KNB-14 (7.2V 600mAh battery) ............................. 58 (2-5/16) W x 135 (5-5/16) H x 32 (1-1/4) D mm (in) 400g (0.88lbs) With KNB-15A (7.2V 1100mAh battery) ......................... 58 (2-5/16) W x 135 (5-5/16) H x 35 (1-3/8) D mm (in) 440g (0.97lbs) Receiver (Measurements made per EIA standard EIA-RS316B) Sensitivity EIA 12dB SINAD ........................................................... 0.25mV (Wide)/0.28mV (Narrow) Selectivity ......................................................................... 70dB (Wide)/65dB (Narrow) Intermodulation ................................................................ 65dB (Wide)/60dB (Narrow) Spurious response (Except for IF 1/2) ............................. 60dB Audio Power Output ......................................................... 500mW Frequency Stability ........................................................... ±2.5ppm Channel Frequency Spread ............................................. 20MHz (K, K2) Transmitter (Measurements made per EIA standard EIA 316B) RF Power output .............................................................. 4W/1W Spurious and Harmonics .................................................. 70dB Modulation........................................................................ 16KfF3E (Wide)/11KfF3E (Narrow) FM Noise .......................................................................... 45dB (Wide)/40dB (Narrow) Audio Distortion ................................................................ Less than 5% Frequency Stability ........................................................... ±2.5ppm Channel Frequency Spread ............................................. 20MHz (K, K2)