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Ritron DR-142, Руководство по эксплуатации и обслуживанию

Ritron DR-142 - надежное и компактное устройство для профессиональной радиосвязи. Операторы могут скачать Operating And Service Manual бесплатно с нашего сайта. Руководство поможет в настройке и обслуживании устройства, обеспечивая эффективное использование. Посетите manualshive.com для загрузки.

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PRELIMINARY

DR-142

PROGRAMABLE VHF FM RECEIVER MODULE

OPERATING AND SERVICE MANUAL

RITRON INC.

Содержание DR-142

Страница 1: ...0 PRELIMINARY DR 142 PROGRAMABLE VHF FM RECEIVER MODULE OPERATING AND SERVICE MANUAL RITRON INC...

Страница 2: ...T 6 4 PROGRAMMING THE RADIO 7 PROGRAMMING THE RADIO USING A PC COMPUTER 7 Programmable Features 7 COMPUTER SOFTWARE COPYRIGHTS 7 5 DR 142 THEORY OF OPERATION INTRODUCTION 8 POWER SUPPLY AND VOLTAGE DI...

Страница 3: ...els 8 Independent RX frequencies Synthesizer Step Size 5 kHz Frequency Stability 2 5 PPM 30 to 50 C Tone Code Signaling CTCSS Quiet Call and DCS Power Supply 8 to 15 VDC Battery Drain RX Standby 20 mA...

Страница 4: ...ensitivity Manually adjustable factory set for 20 dB SINAD 1 5 kHz deviation 3 0 kHz used for wideband AUX OUT frequency response 6 3000 Hz 1 3 dB Audio Output 700 mW into 8 with less than 5 THD Sub D...

Страница 5: ...to this equipment Such modifications could void the user s authority to operate the equipment MAINTENANCE INFORMATION Surface Mount Repair RITRON surface mount products require special equipment and s...

Страница 6: ...re that no voltage transients are present 6 Soldering Use a grounded soldering iron for soldering CMOS circuitry 7 Lead straightening tools When straightening CMOS leads provide ground straps for the...

Страница 7: ...rogramming cable The other end of the programming cable connects to the PC s serial port 25 pin D sub connector The appropriate DR 142 programming software must be run for configuring the transceiver...

Страница 8: ...model displayed will be that of the last radio read by the software and the default parameters for that radio To read the radio contents click radio on the menu bar and then read radio Allow several s...

Страница 9: ...lled oscillator TCVCXO operating at 14 4 MHz The Pin 4 output of the TCVCXO provides a reference for the frequency synthesizer U401 at Pin 8 The reference oscillator also feed pin 7 of the U301 microc...

Страница 10: ...here a low pass filter R323 and C309 removes spurious second IF output prior to application to the voice tone or squelch conditioning audio circuitry Two types of squelch circuits exist on the DR 142...

Страница 11: ...program frequency information Also used for flash programming MOSI 16 CLK output sends serial data clock pulses to frequency synthesizer Also used in flash programming MISO 17 output is set permanent...

Страница 12: ...o readjust do the following 1 Make sure that the unit is at room temperature approximately 25 C 2 Set the RF communications test set to the transmit frequency counter mode 3 Select low edge channel on...

Страница 13: ...feated by turning the R144 pot fully counterclockwise or removing Q110 To adjust squelch levels for simultaneous use do the following Set RSSI squelch level first 1 Temporarily defeat noise squelch po...

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