Samyung Srg 1150 Service Manual 19 -

Balanced modulation via digital processing or analog-to-digital conversion baselines depending on production mark revisions.

procedures. Below is the technical text typically found in the maintenance and troubleshooting sections of the SRG-1150 service documentation: Section 19: Maintenance and Troubleshooting 19.1 Self-Diagnosis Function samyung srg 1150 service manual 19

In-depth breakdown of the motherboard, power board, TX/RX boards, synthesizer, and PTT circuits. Provides the (44

Provides the (44.545 MHz) to mix down to the 455 kHz 2nd IF. 10 years old

If your unit is >10 years old, replace C112, C115, and C214 (10uF/25V) on the audio board. Leaking caps cause the “motorboating” sound on receive.

The SRG-1150DN utilizes Direct Digital Synthesizer (DDS) signal generation to achieve exceptional frequency stability within 10Hz. The core electrical performance metrics dictate the baseline tolerances required during a bench service alignment: Specification Requirement Service Tolerance 1.6 MHz to 27.5 MHz (10 Hz steps) ±plus or minus 10 Hz maximum variance RX Frequency Range 500 kHz to 29.9999 MHz Continuous tuning Output Power Adjustable via Power Control PCB Emission Types J3E (USB), H3E, F1B (FSK) Fully GMDSS compliant RX Intermediate Freq. 1st IF: 49.455 MHz | 2nd IF: 455 kHz Strict filter matching DSC Watch Frequencies 2187.5, 4207.5, 6312, 8414.5, 12577, 16804.5 kHz 100 baud scanning System Architecture & Circuitry Breakdown