Motorola Vhf 136 174 Mhz Uhf 435 480 Mhz 6881096c38 Manual
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Chapter 7 VHF (136-174 MHz) Band Information 7.1 Model Chart Business Portable Radio, VHF, 136-174 MHz Model Description AAH49KDF8AA1A_Business Portable, 136-174 MHz, 2-5W, 12.5/25 kHz, 16 Ch. AAH49KDF8AA1A_ Business Portable, 136-174 MHz, 2-5W, 12.5/25 kHz, 4 Ch. ItemDescription X PMUD1925_ Business Portable, 136 -174 MHz, 2-5W, 12.5/25 kHz, 16 Ch. XPMUD1922_Business Portable, 136 -174 MHz, 2-5W, 12.5/25 kHz, 4 Ch. X DSAXRK210004 Front Housing Kit, Black CP125 XDSAXRK210001Front Housing Kit, Black...
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March, 20066881096C38 7-2VHF (136-174 MHz) Band Information: Model Chart XXPMAD4027_VHF Helical 15cm Antenna, 136-155 MHz X X PMAD4028_ VHF Helical 15cm Antenna, 148-174 MHz XXNAD6502_Standard VHF Heliflex Antenna, 150-162 MHz X X PMTN4087_ Standard Rapid Rate Charger Kit, 120V X3380384W23CP125 Nameplate X DSAXRM160001 BC120 Nameplate XXHLN9844_2 Spring Belt Clip X 6881096C35 Business Portable Radio User Guide (English) X6881098C60CP125 Radio User Guide (English/French) X = indicates one of each is...
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Specifications7-3 March, 20066881096C38 7.2 Specifications General TransmitterReceiver All specifications are subject to change without notice. VHF Frequency:136-174 MHz Channel Capacity: 16, 4 Power Supply:7.5 Volts ±20% Dimensions with Stan- dard High Capacity NiMH Battery:115.5mm x 56mm x 35mm Weight: with Standard High Capacity NiMH Battery:350 g Average Battery Life @ (5-5-90 Duty Cycle)(Low Power) >11 hrs(High Power) >8 hrs Sealing:Passes rain testing per IPX4 (EN60529=1991) Shock and...
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March, 20066881096C38 7-4VHF (136-174 MHz) Band Information: Theory of Operation 7.3 Theory of Operation 7.3.1 General Information Your radio has two printed circuit boards: the Controller board, and the Radio Frequency (RF) and Audio Frequency board. The Controller board contains the CPU/Control section. The RF board contains the VCO/Synthesizer section, Transmitter section, Receiver section, Transmitter Audio circuitry, Receiver Audio circuitry, and Battery section. 7.3.2 Power Distribution Figure...
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6881096C38March, 2006 VHF (136-174 MHz) Band Information: Theory of Operation 7-5 7. The radio restores last power up state (i.e. state before the radio was turned-off). 8. Power is supplied to PLL circuitry. 9. Power is supplied to Rx and Rx VCO circuitry. 10. CPU sends data to PLL circuitry. If LOCK status is confirmed, radio continues the power-up sequence. Otherwise, PLL ERR is displayed. 11. If the Rx audio level is less than the pre-programmed squelch level, and other unmuting conditions are met,...
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March, 20066881096C38 7-6VHF (136-174 MHz) Band Information: Theory of Operation 7.3.5.3 Synthesizer The frequency synthesizer is a large-scale monolithic synthesizer integrated circuit Q323. The synthesizer IC contains a dual modulus prescaler, programmable divide-by-N counter, prescale control (swallow) counter, reference oscillator, reference divider, phase detector, charge pump and lock detector. Also, included in Q323 are shift registers and control circuits for frequency controls and general...
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6881096C38March, 2006 VHF (136-174 MHz) Band Information: Theory of Operation 7-7 7.3.7 Power Control Output power is controlled by the CPU (Q101), the D/A converter (Q121), the dual Op-Amp (Q419), which is used as a differential amplifier and comparator. Current is sensed by the voltage drop across R445. When the radio is in high power mode, this voltage is compared to the D/A converter voltage at 5-watt. When the radio is in low power mode, this voltage is compared to the D/A converter voltage at...
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March, 20066881096C38 7-8VHF (136-174 MHz) Band Information: Theory of Operation 7.3.8.3 Mixer The mixer is a DBM type (L407, Q407, L408). The mixer LO frequency is 45.1 MHz above the desired receiver frequency. When the receiver frequency is present, the mixer output will be a 45.1 MHz signal. The mixer output is peaked for 45.1 MHz at L410, C432 and R413, and the signal is filtered by crystal filter F402 and amplified by Q408 before being directed to IF IC Q506. The 45.1 MHz IF signal and LO...
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6881096C38March, 2006 VHF (136-174 MHz) Band Information: Block Diagrams 7-9 7.4 Block Diagrams 7.4.1 Complete Figure 7-2. SAVE 5VRX 5V DAC RX Key Pad Power Input TX 5V BATTERY 5VDAC RXDAC TX 35 DTMF IN RC NETWORK 9 RC NETWORK 3 MIC M101CN701 CN101 27 31 4 15 16 22 25 2522 15 163 4 319 35 27 DAC TX+ SW B Ripple Filter Q3305VSPK SP701 (1/2) DTMF IN Detect Detect 13 13 ANT Hamonics Filter C440-445 L415,L416 ANT Switch Q409,410 Matching Network C446-448, 451,452 L418,419 2-Pole Band Pass Filter Q401 RF...
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March, 20066881096C38 7-10VHF (136-174 MHz) Band Information: Block Diagrams 7.4.2 Controller Figure 7-3. 7.4.3 VCO Figure 7-4. Key Pad 35 RC NETWORK 9 RC NETWORK3 MIC M10127 31 4 15 16 22 25 13 EEPROM Q114 CPU Q101 PTT S102Mon S101LCD LC101Shift Q102Xtal 8.38MHz X101 Restart Q133-Q138 Reset Q105 DA Converter Q121 CPU Pin87 DIODE Q126 CPU Pin21CPU Pin22 CPU Pin36 DC AMP Q125 CN101 RX Local Buffer TX BufferDATA Audio Sub Audio TX/RX SW CONTL Ripple Filter Q330 5V VCO Buffer Q308 RX VCO Q311 Q324...