Icom ID-51A Service Manual - Page 4

SECTION 1. SPECIFICATIONS D General • Frequency coverage : (unit: MHz) Version TX RX EUR, KOR 144-146, 430-440 144-146, 430-440 UK 144-146, 430-440 108-174*1, 380-479*2 ITR 144-146, 430-434, 108-136.995,*1 144-146, 435-438 430-434, 435-438 U.S.A. 144-148, 430-450*3 108-174*4, 380-479*3 EXP 137-174*4, 400-479*2 108-174*4, 380-479*2 EXP-1 144-148, 430-440 108-174*4, 380-479*2 ALL - BC Radio (AM): 0.520-1.710 MHz BC Radio (FM): 76.0-108.0 MHz*5 *1Guaranteed 144-146 MHz only *2Guaranteed 430-440 MHz only *3Guaranteed 440-450 MHz only *4Guaranteed 144-148 MHz only *588.0-108.0 MHz for the USA version. The SUB band audio signal may be muted, depending on the combination of operating band and mode. • Mode : FM, AM (Rx only), DV • Number of memory channels : 554 (incl. 50 scan edges and 4 call channels) • Number of BC radio memory channels : 500 • Usable temp. range • Tuning steps : -20°C to +60°C; -4°F to +140°F : 1, 5, 6.25, 8.33, 9, 10, 12.5, 15, 20, 25, 30, 50, 100, 125 and 200 kHz *The selectable steps may differ, depending on the selected fre- quency band or operating mode. • Frequency stability : ±2.5 ppm • Power supply (-20°C to +60°C; -4°F to +140°F) : 10.0-16.0 V DC for external DC power, or specified Icom's battery pack • Digital transmission speed : 4.8 kbps • Voice coding speed : 2.4 kbps • Current drain (at 7.4 V DC) : TX (at 5 W) Less than 2.5
A RX Max. output FM Less than 350 mA (Internal speaker) Less than 200 mA (External speaker) DV Less than 450 mA (Internal speaker) • Antenna connector • Dimensions (projections not included) • Weight (approximately) Less than 300 mA (External speaker) : SMA (50 Ω) : 58(W)×105.4(H)×26.4(D) mm; 2.3(W)×4.1(H)×1.0(D) in : 255 g; 9 oz (incl. battery pack and antenna) D Transmitter • Modulation system : FM Variable reactance frequency modulation DV GMSK reactance frequency modulation • Output power (at 7.4 V DC) : High 5.0 W, Mid. 2.5 W, Low2 1.0 W, Low1 0.5 W, S-Low 0.1 W (Typical) • Max. frequency deviation: ±5.0 kHz (FM wide: approx.) ±2.5 kHz (FM narrow: approx.) • Spurious emissions : Less than -60 dBc at High/Mid. Less than -13 dBm at Low2/ Low1/S-Low • Ext. mic. impedance : 2.2 kΩ D Receiver • Receive system : Double-conversion superheterodyne • Intermediate frequencies A Band : 46.35 MHz (1st IF) : 450 kHz (2nd IF) B Band : 61.65 MHz (1st IF) : 450 kHz (2nd IF) • Sensitivity (except spurious points) FM (1 kHz/3.5 kHz Deviation; 12 dB SINAD) : Less than -15 dBµ DV (PN9/GMSK 4.8 kbps; BER 1%) : Less than -11 dBµ • Audio output power (at 10% distortion) Internal speaker : More than 0.4 W with a 16 Ω load External speaker : More than 0.2 W with a 8 Ω load • Selectivity FM (Wide) : More than 55 dB FM (Narrow), DV : More than 50 dB • Ext. speaker connector : 3-conductor 3.5(d) mm; (1⁄8˝)/8 Ω • Spurious and image rejection ratio : More than 60 dB • Squelch Sensitivity (threshold, 1 kHz/3.5 kHz Deviation) : Less than -15 dBµ 1 - 1