KL-900B 類比通訊系統
144MHz VHF FM Transceiver Trainer
KL-900B Analog Communication System discloses the secret of the walky-talky based on the 144MHz VHF band. The circuitry of walkytalky is shown as blocks : receiver block, transmitter block, audio mplifier block and microphone amplifier block.
Block diagrams are printed clearly on the panel of the module, giving students a comprehensive view of how walky-talky works.
產品特色
- 144MHz VHF FM transceiver trainer.
- 2 modules construct the inner structure of the walky-talky, and cover more than 9 fully documented experiments.
- Experiment and instructor's manual are included.
產品規格
List of Experiments
- Introduction to Analog Communication System
• Resetting the transceiver
• Setting the channel frequency
• Expanding frequency range
• Operating two keys
• Operating SET key - Microphone Amplifiers
• Measuring PTT DET output
• Measuring transmitted signal
• Measuring MIC-AMP (LIM) output
• Measuring MIC-LPF output - Phase-Locked Loops
• Measuring crystal oscillator output
• Measuring data, clock and LE in receiving
• Measuring data, clock and LE in transmitting
• Measuring phase comparator inputs
• Measuring phase comparator output - Voltage-Controlled Oscillators
• Measuring RX VCO characteristic
• Measuring TX VCO characteristic - RF Power Amplifiers
• Measuring TX POWER AMP input and output
• Measuring APC AMP input and output - RF Amplifiers
• Measuring RF AMP input
• Measuring RF AMP output
• Measuring BPF output - Mixers and IF Amplifiers
• Measuring RX VCO output
• Measuring 1st MIXER output
• Measuring CRYSTAL BPF output
• Measuring 1st IF AMP output
• Measuring 1st IF AMP input and output - FM Demodulators
• Measuring second mixer output
• Measuring 2nd FILTER output
• Measuring S-MET AMP output
• Demonstrating squelch control - Audio Amplifiers
• Measuring AF PREAMP input
• Measuring AF PREAMP output
• Measuring AF POWER AMP output