a) Power Source + 12V D.C Nominal (?1.2V MAX.) b) Temperature Range Storage 80? C maximum - 40? min. 25? C c) Operating 60? C maximum - 20? min. d) Antenna Impedance 50 ohm e) Frequency Control PLL SYNTHESISER f) Frequency Tolerance and Stability 1.5 PPM g) High Humidity 90% h) Channel Capability 1 i) Nominal Dimensions 134mm (L) X 60mm (W) X 20mm (H) j) Weight 190g k) Freq range 146 to 174 Mhz. or 136 to 150 MHz. l) Channel spacing 12.5 kHz m) Emission 8k50f3e. n) Frequency spread 28 MHz. o) Frequency stability 1.5ppm p) Type of operation Simplex q) Operating temperature range 200C to +700C r) Type of antenna helical antenna. 4.19. Radio Data Modem (Data Transceiver) Normal Performance Specifications: a. Performance Specifications ETSI300-113 b. RF OUTPUT Power 5W /1 W Programmable c. Modulation Type FM d. Intermediate Frequencies 45 MHZ, 455 KHZ e. Channel Spacing 12.5 KHZ, 25 KHZ(Programmable) f. Transmit Attack Time g. Current Consumption Transmit 1500mA @ 5W, 800mA @ 1 W h. Receive 100mA (max) 4.20. Transceiver Requirements: a) Receiver: i. Sensitivity 0.3 micro volts / - 118 dbm at 12 db SINAD. ii. Selectivity Better than 60 db. iii. Image and spurious rejection Better than 65 db. iv. AF distortion Better than 5%. v. Squelch sensitivity Better than -119 dbm. vi. AF response With in + 1, -3 db of 6 db/octave. vii. Impedance 50 ohms b) Transmitter: i. RF power output 1 watt / 5 watt programmable ii. Frequency deviation +/-5 kHz or +/-2.5khz type iii. Modulation sensitivity Better than 10 mv at 1 khz at mic input for 1.5 khz and +/- 3khz standard deviation iv. Modulation distortion Better than 5%. v. Modulation fidelity With in + 1, -3 db of 6db/octave vi. Spurious and harmonics Better than 60 db. vii. Output impedance 50 ohms