Scooper_MR-1000B_Manual操作说明书手册

INSTRUCTION MANUAL[3]CONTROLS INDICATORSMODEL MR-1000B,VHF LOW FM 10CH HANDY SCANNER1)Control Functions1.ON/OFF Volume Turn the knob clockwiseII】.SPECIFICATIONSto apply power to the unit and to set thedesired listening level.1.Frequency2.SQUELCH This control is used to cut offor eliminate receiving background noise inVHF Low band....78-88MHzthe absence of incoming signal.For max-imum receiver sensitivity,it is desired2.Sensitivitythat the control is adjusted only to theless than 1.0uv input for 20dB S/Npoint where the background noise or ambi-3.Selectivityent background noise eliminated.Turn the6dB 7.5KHzknob counterclockwise then slowly turn50dB 12KHzclockwise until the receiver noise dis-4.Modulation Acceptanceappears.Any signal to be received must+5KHznow be slightly stronger than the average5.Intermediate Frequencyreceiver noise.Further clockwise rota-lst I.F.10.7MHztion will increase the threshold level2nd I.F.455KHzwhich a signal must overcome in order to6.Audio Power Outputbe heard.Only strong signal is heard at120mw at 108 distortionmaximum clockwise setting.150mw at maximum7。Scan Speed2)Accessory circuit operation10-channel/sec.3.AUTO/MAN CH SEL This switch determines8.Delay Timethe desired scanning way,automatic scan-2 secondsning or manual channel selection.When you9.Antennapush this switch,LED 'AUTO'lights and you50 ohms,External antennacan manage automatic scanning from CHl to10.Semi-ConductorsCH10 one by one.When you push this switch4 ICs,9 Transistors,1 PUT,15 Diodesagain,LED 'AUTO'goes out and you can man-&12 LEDsage manual channel selection by pushing11.Power Source'CH SEL'switch next to AUTO/MAN switch.4.8 VDC4.EAR plug an earphone into 'EAR'jack.12.Frequency StabilityDisable internal speaker when connected.better than0,002号at-20oco.+50°C5.ANT.CHG Install an antenna into 'ANT.CHG'13.Built-in Speakerjack when normal operation.For re-charg-8 ohms,round typeing Ni-Cad battery built-in,take out theantenna and plug a battery charger into【2】CRYSTAL INSTALLATION'ANT.CHG'jack.1)How to install crystals3)IndicatorsHold the top of the unit by one hand.Push6.LED Channel Indicator You can see thethe upper middle part of rear cabinet andreceived channel by lighting of 10 pcs.pull it downward by another hand.Then,LED from CH1 to CH10.install crystals in each crystal socket.7.BATT This LED shows the battery life2)Crystal Formulaautomatically when battery is exhausted.8.AUTO This LED lights when automatic scan-ning.VHF Low BandCrystal Freq.Channel Freg.+10.723)Crystal Specifications1.Crystal Holder TypeHC-25/U2.Mode Oscillator3rd over tone3.Operation Temperature-20°Ct0+50°C4.Temperature Stability+0.00585.Frequency Tolerance0.00286..Load Capacitance20pF7.Equivalent Resistance35 ohms (maximum)8.Shunt Capacitance7pF(maximum)】9.Drive Level2mWMICKEY INDUSTRY LIMITEDPRINTED IN JAPAN