FCC ID: MGR-460 USER’S MANUAL (CHEROKEE ) 14 Channel Miro-Size Family Radio Service (FRS) Hand Portable Radio Model : FR-460
TRANSMITTER ALIGNMENT The radio needs to be disassembled before any alignment could be conducted: Text from the Technical Manual! a) Disassembling the unit The Cover Unlock the battery compartment by flipping the cover lock clip Open and remove the battery compartment cover. Remove batteries in the battery compartment. Remove the 4 screws on the side of the battery compartment. The case could then be opened for servicing.
CIRCUITS AND DEVICES TO STABILIZE FREQUENCY The operating frequency of the radio is generated by a Voltage Controlled Oscillator controlled by a Phase Locked Loop (PLL) circuit. The reference frequency of the PLL comes from a 12.8MHz Temperature Compensated Crystal Oscillator OTC and locks the VCO output frequency stability of within the operating temperature range. Q401 is a Cockpits oscillator. L402 together with C402, C416, VC Diodes D401 and D403 formed the tuning circuit for the VCO.
FCC ID: MGR-460 APPENDIX 8 CIRCUITS TO SUPPRESS SPURIOUS RADIATION AND LIMIT MODULATION FOLLOWS THIS SHEET CIRCUITS TO SUPPRESS SPURIOUS RADIATION AND LIMIT MODULATION FCC ID: MGR-460 APPENDIX 8 ws55\wirfraéo
CIRCUITS TO SUPPRESS SPURIOUS RADIATION AND LIMIT MODULATION 1) Circuits to suppress spurious radiation and harmonics in order to achieve the Spurious and Harmonics Specification of ~55dBc, The transmitting signal, after being amplified by the transmitter final stage Q201 is fed to a series of low pass filters before entering the antenna for transmission: a) One stage "L” type low pass filter L202/C203 prior to the antenna switching diode D201.