Craig_4353-4354_Service_Manual维修手册含电器原理图

SERVICE MANUAL4353R4354HI/LO VHF AND UHF SCANNING MONITORS12345878910ooo C oooO.4353 8-CHANNEL4354 12-CHANNELSPECIFICATIONSFREQUENCY RANGE.·······.L0VHF:30-50MHzCRYSTAL FREQUENCY (thirdHi VHP 150 -174 MHzovertone】CALCULATION.......Lo VHF:CH Freq'cy±10,7MHzU亚：450-520HzHi VHP:(Channel FrequencyRF BAND WIDTH...............Lo VHF:6 MHz-10.7MHz)/3(supplied 37 to 43MHz)UH亚：(Channel FrequencyHiV证：8 MHz-10.7MHz)/9(supplied 152 to 160MHz)CRYSTAL TRIMMER RANGE.·±O.O01%UHF:10 MHzINPUTS......................2 Motorola ANT.jacks one for(supplied 455 to 465MHz)Hi/Lo VHP and one for UHFSENSITIVITY.................0.5 uv for 20 dB quietingOUTPUTS.....................External speaker (headphones)(center band)jack (8 Ohms)IMAGE REJECTION.............50 dBP0wERS0URCE........·..·.12V,0.4ADC;120V,50/60Hz,SQUELCH SENSITIVITY.··.0.5 uv minimum11 W ACMODULATION ACCEPTANCE.·,··,5kHz4353 CONTROLS...............Volume,Power,Squelch,P0 WER OUTPUT,·.·,2.0 w into8OhmsSelect/Scan/Bypass (8)SCAN MODES..................Automatic and manual4353 INDICATORS.............8 Channel LampsCRYSTAL DATA................Resonance:Parallel4354 CONTROLS...............Volume,Power,Scan Delay.Overtone:3rdSquelch,Weather,Priority,Load capacity:20pFSelect/Scan/Bypass (10)Maximum drive:2 mW4354 INDICATORS.............11 Channel Lamps and one LEDMaximum series resistance:35 Ohmsfor WeatherA PRODUCT OF CRAIG CORPORATION