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General| Channel Capacity | 16 Channels |
|---|---|
| Power Output | 5W |
| Battery Life | Up to 12 hours |
| IP Rating | IP54 |
| Type | Portable |
| Frequency Range | 400 - 470 MHz |
| Channel Spacing | 12.5 kHz / 25 kHz |
| Operating Voltage | 7.5V |
| Operating Temperature | -20°C to +60°C |
| Battery | Li-Ion |
Defines the target audience and scope of the service manual.
Describes different operational modes for the transceiver.
Provides instructions on accessing various operational modes.
Details the procedure for connecting and operating the transceiver via PC.
Explains how to copy transceiver data wirelessly to another unit.
Step-by-step guide for disassembling the transceiver's case.
Instructions for removing the main TX-RX unit from the chassis.
Procedure for removing the battery release lever.
Important notes and warnings for correctly reassembling the battery release lever.
Detailed steps for reattaching the battery release lever.
Instructions for assembling the battery release lever components.
Steps for attaching the positive terminal assembly to the chassis.
Guide for securely mounting the chassis into the case assembly.
Procedure for screwing the antenna receptacle onto the chassis.
Notes on differences in nuts for volume and channel knobs.
Order of screws for mounting the TX-RX unit to the chassis.
Explains the receiver's double conversion and local oscillator signal source.
Describes the overall frequency configuration of the receiver section.
Details the IF amplifier stage and its role in signal processing.
Explains how the circuit handles Wide/Narrow audio level settings.
Describes the path of the demodulated signal to the speaker.
Explains the squelch circuit's function in controlling speaker output based on noise level.
Covers QT/DQT and MSK signaling reception and processing.
Describes DTMF signal input and processing.
Explains how the VCO frequency is controlled in transmit and receive modes.
Describes the function of the unlock detector and its effect on the transmitter.
Introduces the transmitter system components.
Details the microphone amplifier stage and DTMF muting.
Explains the pre-drive, drive, and final RF power amplifier stages.
Describes the Automatic Power Control circuit's function.
Explains QT/DQT and MSK encoding processes.
Details DTMF data output and VCO modulation.
Explains MSK signal output and muting during encoding.
Lists the four 5V power supply descriptions.
Outlines the functions controlled by the microprocessor.
Explains the circuit that shifts frequency via beat shift switch.
Describes the CPU and EEPROM for storing program and channel data.
Details the low battery warning system with LED and tone indicators.
Explains how key and channel selector signals are input to the microprocessor.
Lists the pin functions for connector CN401.
Details the pin functions of the microprocessor IC405.
Lists components for the TX-RX unit with their references and functions.
Lists capacitor part numbers, descriptions, and destinations.
Lists the necessary test equipment for performing alignments.
Identifies key points on the PCB for adjustments.
Provides frequency and signaling tables for adjustment procedures.
Details settings and adjustments for common transceiver functions.
Covers adjustments for transmitter output power and deviation.
Details receiver BPF waveform adjustment procedures.
Covers sensitivity check and squelch adjustments for the receiver.
Shows the component layout on the TX-RX unit's component side.
Shows the component layout on the TX-RX unit's foil side.
Displays the detailed schematic diagram for the TX-RX unit.
Describes the rapid charger, its specifications and external view.
Details the Ni-MH battery pack, its specifications and schematic.
Details the Ni-Cd battery pack, its specifications and schematic.
Describes the belt clip accessory.
Lists general specifications for the transceiver, including frequency range and dimensions.
Provides receiver measurement specifications according to TIA/EIA-603 standards.
Provides transmitter measurement specifications according to TIA/EIA-603 standards.
