PRO-44 (200-0304) Specifications Faxback Doc. # 8488 Frequency Coverage VHF-Lo........................................30-50 MHz (in 5 kHz steps) Ham...........................................50-54 MHz (in 5 kHz steps) Aircraft...............................108-136.975 MHz (in 25 kHz steps) Government..................................137-144 MHz (in 5 kHz steps) Ham.........................................144-148 MHz (in 5 kHz steps) VHF-Hi......................................148-174 MHz (in 5 kHz steps) Ham/Government............................380-450 MHz (in 12.5 kHz steps UHF-Lo...................................450-470 MHz (in 12.5 kHz steps) UHF-Hi...................................470-512 MHz (in 12.5 kHz steps) Channels of Operation.....................50 channels and 1 monitor channel Sensitivity (20 dB Signal-to-Noise Ratio). 30-54 MHz.....................................................1.0 microV 108-136.975 MHz...............................................2.0 microV 137-174 MHz...................................................1.0 microV 380-512 MHz...................................................1.0 microV Spurious Rejection 30-54 MHz................................................50 dB at 40 MHz 108-136.975 MHz.........................................50 dB at 124 MHz 137-174 MHz.............................................50 dB at 154 MHz 380-512 MHz................................................Not Specified Selectivity +/-10 kHz..........................................................-6 dB +/-20 kHz.........................................................-50 dB IF Rejection 10.7 MHz................................................50 dB at 154 MHz Scanning Rate............................................16 channels/second Search Rate.................................................16 steps/second Delay Time.........................................................2 second If Frequencies.........................................10.7 MHz and 455 kHz Filters..................................1 Ceramic filter, 1 Crystal filter Squelch Sensitivity Threshold..............................................Less than 1.0 microV Tight (VHF Lo, Hi UHF)........................................(S+N)/N 20 dB Antenna Impedance...................................................50 ohms Audio Power..........................................................200 mW Built-in Speaker.........................1 3/8" (36 mm) 8 ohm, dynamic type Power Requirement.....................................+9V DC, 6AA batteries or a suitable adapter (Negative ground only) Current Drain (squelched).............................................40 mA Operating Temperature.......................+14F to + 140 F (-10C to +60 C) Storage Temperature...........................-40F to +160F (-40C to + 71C) Dimensions...................................5 3/4 x 2 3/8" x 1 5/8") (HWD) (145 x 58 x 42 mm) Weight..............................................Approx. 8.8 oz. (250 g) without antenna and batteries (RLR-10/21/93)