Icom ID-51A Service Manual - Page 19

SECTION 5. ADJUSTMENT PROCEDURE 5-1 PREPARATION ¤ REQUIRED EQUIPMENTS EQUIPMENT GRADE AND RANGE Power supply Voltage range Current capacity : 1-15 V : More than 3 A Audio generator (AG) Frequency range : 300-3000 Hz Output level : 1-500 mV Modulation Analyzer Frequency range : 30-600 MHz Measuring range : 0 to ±10 kHz AC millivoltmeter RF power meter (50 Ω terminated) Measuring range Measuring range Frequency range SWR : 10 mV to 10 V : 0.1-10 W : 100-600 MHz : Less than 1.2 : 1 EQUIPMENT JIG cables Attenuator Standard signal generator (SSG) GRADE AND RANGE Modified 3-conductor plugs (See the illustration below) Power attenuation : 40 dB Capacity : More than 10 W Frequency range Output level : 0.1-600 MHz : -20 dBµ to 90 dBµ (-127 to -17 dBm) Frequency range : 0.1-600 MHz Frequency counter Frequency accuracy : ±1 ppm or better Input level : Less than 1 mW ¤ JIG CABLES • JIG cable #1 (GND) (SP) 3-conductor 3.5 (d) mm plug Less than 4.5 (d) mm (REMOTE) • JIG cable #2 (GND) 3-conductor 2.5 (d) mm plug 82 kΩ AUDIO GENERATOR (300-3000 Hz/1-500 mV) PTT +− Less than 4.5 (d) mm (EXTMIC) 33 k + 4.7 µF AC MILLIVOLTMETER (10 mV to 10 V) SETTING; Frequency : 1 kHz Level : 90 mVrms +− Waveform : Sine wave ¤ CONNECTION Standard signal generator -20 to 90 dBµ (-127 dBm to -17 dBm) to the antenna connector FM Attenuator deviation meter 40 dB DO NOT transmit while an SSG is connected to the antenna connector. RF power meter 0.1-6 W/50 Ω POWER SUPPLY CONNECTION Frequency counter • Adjustment at 13.5 V • Adjustment at 5.5 V or 7.4 V To the [DC IN] jack OPC-254L Black: Be sure about the polarity To [MIC] JIG cables To [SP] White: DC power supply 13.5 V/3 A DC power supply 5.5 V or 7.4 V/3 A [DC IN] 5 - 1