Vertex Standard VX-5500U

3-2

Block Diagram

Contents

Main VX-5500U Service Manual Introduction UHF FM Transceiver Contents CONTROLS & CONNECTORS Front Panel 1-2 CONTROLS & CONNECTORS REAR (Heatsink) 1-3 BASIC OPERATION OF THE TRANSCEIVER Switching Power ON/OFF Setting the Volume Transmitting Selecting Groups and Channels 1-4 1-5 Channel Scan Dual Watch ARTS (Auto Range Transpond System) The PF Button Function 1-6 DIM EMG (Emergency) HA (Horn Alert) Home (Home Channel) Page 1-8 OPTIONAL ACCESSORIES 1-9 1-10 1-11 Page 2-1 Cloning DealerProgramming of VTP-50 and F5D-14 2-2 Specifications G RECEIVER (Measurements made per EIA standard TIA/EIA-603) TRANSMITTER (Measurements made per EIA standard TIA/EIA-603) 3-1 Exploded View & Miscellaneous Parts Page Page Page 4-1 Circuit Description Receiver PLL synthesizer 4-2 Circuit Description Transmitter DCS Demodulator CTCSS encoder/decoder MPU 5-1 Required Test Equipment Alignment Preparation & Precautions 5-2 PLL & Transmitter PLL Reference Frequency Alignment Channel Frequencies 5-3 Transmitter Output Power Transmitter Deviation 5-4 Receiver 5-5 Squelch Threshold Page 6A-1 6A-2 6A-3 ACE 3 Side A Parts Layout 6A-4 gb 5 Side B adcfe 1 6A-5 6A-6 6A-7 6A-8 6A-9 6A-10 6A-11 6A-12 6A-13 6A-14 6A-15 6A-16 6A-17 6A-18 6A-19 6A-20 6A-21 6A-22 6A-23 Page Page Page Page Page 6B-5 6B-6 6B-7 6B-8 6B-9 Page KEY Unit Page 6C-3 KEY Unit Page 6D-1 VR Unit Parts Layout Side A Side B MIC CONN Unit F2D-8 2-Tone Decode Unit 7A-2 VTP-50 VX-Trunk Unit 7B-2 FVP-25 Encryption / DTMF Pager Unit 7C-2 F5D-14 5-Tone Unit 7D-2 F5D-14 5-Tone Unit Page 7E-2 7E-3