tender for procuring wireless main set for the use of thamara, periyar section and two vehicles (kl-05-aq-2719, kl-01-bf-9570) under periyar range during the year 2025-26 , cost of procuring vhf base station radio unit with standard accessories, 70w max power, etc. including gst. specifications general frequency range : 136.000-173.9975mhz number of channels : 200 channels channel spacing : 25khz (wide mode) 20khz (middle mode) 12.5khz (narrow mode) channel step 2.5khz, 5khz, 6.25khz, 8.33khz, 10khz, 12.5khz, 15khz, 20khz, 25khz, 30khz, 50khz operating voltage : 13.8v dc ±15% squelch : carrier/ctcss/dcs/5tone/2tone/dtmf frequency stability : ±2.5ppm operating temperature: - 20°c ~+ 60°c dimensions : 145(w) x 47(h) x 190(l) x mm approx. weight : approx. 1.2kg , receiver wide mode narrow mode sensitivity : (12db sinad) =0.25?v =0.35?v adjacent channel selectivity = 70db = 60db intermodulation = 65db = 60db spurious rejection = 70db = 70db audio response +1~-3db(0.3-3khz) +1~-3db(0.3 ~ 2.55khz ) hum & noise = 45db = 40db audio distortion =5% audio power output 2w@10% transmitter wide mode narrow mode power output 70w/25w/10w modulation 16kff3e 11kff3e adjacent channel power: = 70db = 60db hum & noise = 40db = 36db spurious emission = 60db = 60db audio response +1~-3db(0.3~3khz) +1 ~- 3db(0.3 ~ 2.55khz) audio distortion = 5%