IC-910H Service manual.pdf - N3UJJ

■ RECEIVER• Receive system :VHF SSB, CW Single conversion superheterodyneFMDouble conversion superheterodyneUHF SSB, CW Double conversion superheterodyneFMTriple conversion superheterodyne• Intermediate frequencies : (Unit: MHz)MAIN BANDSUB BAND1st 2nd 3rd 1st 2nd 3rdSSB 10.8500 — — 10.9500 — —144 MHz CW 10.8491 — — 10.9491 — —FM 10.8500 0.455 — 10.9500 0.455 —SSB 71.2500 10.8500 — 71.3500 10.9500 —430 (440) MHz CW 71.2491 10.8491 — 71.3491 10.9491 —FM 71.2500 10.8500 0.455 71.3500 10.9500 0.455SSB 243.9500 10.8500 — 243.9500 10.9500 —1200 MHz CW 243.9491 10.8491 — 243.9491 10.9491 —FM 243.9500 10.8500 0.455 243.9500 10.9500 0.455• Sensitivity : SSB, CW (10 dB S/N) Less than 0.11 µVFM (12 dB SINAD) Less than 0.18 µV• Squelch sensitivity : SSB, CW Less than 1.0 µV(threshold) FM Less than 0.18 µV• Selectivity : SSB, CW More than 2.3 kHz/–6 dBLess than 4.2 kHz/–60 dB*FMFM-NCW-N(w/FL-132 or FL-133)More than 15.0 kHz/–6 dBLess than 30.0 kHz/–60 dB*More than 6.0 kHz/–6 dBLess than 18.0 kHz/–36 dBMore than 0.5 kHz/–6 dBLess than 1.34 kHz/–60 dB**Except 1200 MHz band• Spurious and image rejection ratio:144/430 (440) MHz More than 60 dB1200 MHz More than 50 dB• AF output power (at 13.8 V DC):More than 2.0 W at 10% distortion with an 8 Ω load• RIT variable range : 144/430 (440) MHz ±1.0 kHz (SSB, CW)±5.0 kHz (FM)1200 MHz ±2.0 kHz (SSB, CW)±10.0 kHz (FM)• IF SHIFT variable range : More than ±1.2 kHz• PHONES connector : 3-conductor 6.35(d) mm ( 1 ⁄4″)• Ext. SP connectors : 2-conductor 3.5 (d) mm ( 1 ⁄8″) /8 Ω × 2 (for MAIN and SUB)1 - 2From The N3UJJ.COM Document Library