Motorola Cm Radio Vhf2 Hp Information Manual
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Commercial Series CM Radios VHF2 (146-174MHz) High Power Service Information Issue: December 2003
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ii Computer Software Copyrights The Motorola products described in this manual may include copyrighted Motorola computer programs stored in semiconductor memories or other media. Laws in the United States and other countries preserve for Motorola certain exclusive rights for copyrighted computer programs, including the exclusive right to copy or reproduce in any form, the copyrighted computer program. Accordingly, any copyrighted Motorola computer programs contained in the Motorola products described...
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iii Table of Contents Chapter 1 MODEL CHART AND TECHNICAL SPECIFICATIONS 1.0 CM140/CM160 Model Chart ................................................................................ 1-1 2.0 Technical Specifications ...................................................................................... 1-2 Chapter 2 THEORY OF OPERATION 1.0 Introduction .......................................................................................................... 2-1 2.0 VHF (146-174MHz)...
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iv 8.0 Transmit Signalling Circuits ............................................................................... 2-17 8.1 Sub-Audio Data (PL/DPL) ............................................................................ 2-17 8.2 High Speed Data .......................................................................................... 2-18 8.3 Dual Tone Multiple Frequency (DTMF) Data ............................................... 2-18 9.0 Receive Audio...
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Chapter 1 MODEL CHART AND TECHNICAL SPECIFICATIONS 1.0 CM140/CM160 Model Chart CM Series, VHF2, 146-174 MHz Model Description MDM50KQC9AA2CM140 146-174 MHz, 45W, 8CH, BNC MDM50KQF9AA2 CM160 146-174 MHz, 45W, 64CH, BNC Item Description XPMUD1848_CM140 Super Tanapa VHF2, 45W, 8CH, BNC X PMUD1894_ CM160 Super Tanapa VHF2, 45W, 64CH, BNC XPMUD1885_CM140 Tanapa VHF2, 45W, 8CH, BNC X PMUD1887_ CM160 Tanapa VHF2, 45W, 64CH, BNC XFCN6288_Control Head X FCN5523_ Control Head XPMUD1885_SCM140 UHF2 U/C BNC Service...
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1-2 MODEL CHART AND TECHNICAL SPECIFICATIONS 2.0 Technical Specifications Data is specified for +25°C unless otherwise stated. General Specification VHF2 Frequency Range:146-174 MHz Frequency Stability (-30°C to +60°C, 25°C Ref.)±2 PPM Channel Capacity:CM140 - 8 CM160 - 64 Channel Spacing: 12.5/20/25 kHz Power Output:25-45W Power Supply: 13.2Vdc (10.8 - 15.6 Vdc) negative vehicle ground Dimensions (L X W X H)118mm X 169mm X 44mm Weight: Low power (1-25W) 1.02 Kg Operating Temperature-30 to 60 o C...
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Technical Specifications1-3 *Availability subject to the laws and regulations of individual countries.Tr a n s m i t t e r Specification VHF2 Frequency Stability: +/- 2.5ppm Modulation Limiting:±2.5 kHz @ 12.5 kHz ±4.0 kHz @ 20 kHz ±5.0 kHz @ 20/25 kHz Current Drain Transmit:7A (25W) FM Hum and Noise:-40 [email protected] kHz -45 dB@ 20/25 kHz Conducted/Radiated Emissions:-36 dBm < 1 GHz -30 dBm > 1 GHz Adjacent Channel Power-60dB @12.5, -70dB @ 20/25kHz Audio Response: ( 300 to 3000Hz)+1, -3dB Audio...
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1-4 MODEL CHART AND TECHNICAL SPECIFICATIONS
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Chapter 2 THEORY OF OPERATION 1.0 Introduction This Chapter provides a detailed theory of operation for the VHF circuits in the radio. Details of the theory of operation and trouble shooting for the the associated Controller circuits are included in this Section of the manual. 2.0 VHF (146-174MHz) Receiver 2.1 Receiver Front-End The received signal is applied to the radio’s antenna input connector and routed through the harmonic filter and antenna switch. The insertion loss of the harmonic...
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2-2THEORY OF OPERATION 2.2 Receiver Back End The IF signal from the crystal filter enters the IF amplifier which provides 20 dB of gain and feeds the IF IC at pin 1. The first IF signal at 44.85 MHz mixes with the second local oscillator (LO) at 44.395 MHz to produce the second IF at 455 kHz. The second LO uses the external crystal Y301. The second IF signal is amplified and filtered by two external ceramic filters (FL303/FL302 for 12.5KHz channel spacing and FL304/FL301 for 25KHz channel spacing)....