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General| Type | Communications Receiver |
|---|---|
| Frequency Range | 0.5 - 30 MHz |
| Modes | AM, SSB, CW |
| Sensitivity | 0.5 μV for 10 dB S/N |
| IF Bandwidth | 6 kHz (AM) |
| Power Supply | 50-60 Hz |
Precautions to be observed before servicing the chassis.
Special safety-related characteristics of parts.
Cautionary notes before starting service procedures.
Guide on how to use the service manual sections.
Guidance on isolating malfunctions to major board levels.
Explanation of the receiver signal path and components.
Details on synthesizer operation for frequency control.
Explanation of the 8049 microcontroller and associated memory.
How radio controls are serviced via serial port.
Operation of keypads, encoder wheel, and RS232 interface.
Procedures for checking power supply voltages and setting clock/timer.
Alignment procedures for synthesizer and passband tuning.
Procedures for tuning the second IF/Audio board filters.
Checking and adjusting the noise blanker function.
Alignment and testing of front end board components.
Theory of operation for VHF converter RF section, control, and synthesizer.
Procedures for aligning the VHF converter.
Step-by-step guide for installing the VHF converter.
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