CONTENT 1. GENERAL 1.1 General 1.2 Characteristic 1.3 Composition 2. SPECIFICATION 2.1 General Specification 2.2 Electrical Specification 3. OPERATION 3.1 Key Name 3.2 Rey Functions 3.3 Setting and Operation 4. ADJUSTMENT 4.1 Frequency synthesizer 4.2 Transmitter 4.3 Transmitter Test 4.4 Receiver 4.5 Receiver Test 4.6 Symptoms, check point & Correction 8. DESCRIPTION OF RADIO CIRCUIT 8.1 Frequency Synthesizer 8.2 Receiver 5.3 Transmitter 6. BLOCK DIAGRAM 7. SCHEMATIC 8. COMPONENT PART LIST 9.
1. GENERAL 1.1 GENERAL This equipment, JF-414EU is called 2 way portable handheld radios. The frequency range is 462~467MHz, UHF operating channels for international 2 way portable radios. 1.2 CHARACTERISTIC a) All active device in this radio is composed of semiconductor and high density IC. b} To design this radio in compact and weight approximately 140g with battery cell. C) CPU of this equipment is TMP47P202 from TOSHIBA. d} It's power can operate by use of alkaline 4 AAA} battery. 1.
2. SPECIFICATION 2.1 GENERAL SPECIFICATIONS a) Frequency Range : 462MHz,467MHz b} Output Impedance : 5042 Unbalanced ¢} Modulation Type : 8KOOF3E d) Communication Mode : Half duplex e) Channel Capacity : 14 channel £) Channel spacing : 12.5 kHz g} Power : 5.4 or 6.6V h) Battery Life : > 30 hours (TX, Rx, Stand-by 90%) i) Operating Temperature : -10°C ~+60T 3) Dimension : 100{H)x 30{W)x k) Weight : 140g{with Battery) 2.
4) Selectivity : < 60dB (12.5kHz) 8) Local Frequency Stability : 6) Spurious Response : < 60dB 7) Audio output : < 250=W 8) Distortion : > 5% (kHz 60% Modulation) 9) RX Audio Response : 6dB/OCT --3dB 10) S/N Ratio : < 40dB (kHz 70% modulation) 11) IF : lst IF = 21.7MHz 2nd IF = 450kHz 12) Local Frequency : lst Local Frequency = fc 21.7MHz 2nd Local Frequency = 21.