Vertex Standard VX-900 27

Main Unit

Circuit Diagram

Contents

Board Units (Schematics, Layouts & Parts) Optional Board Units (Schematics, Layouts & Parts) CONTROLS & CONNECTORS LCD ICONS & INDICATORS Battery Pack Installation and Removal Low Battery Indication Preliminary Steps Operation Quick Start TOR PTT DTMF Soft key and TOGGLE switch Functions Description of Operating Functions Lock Follow-MeScan Follow-MeDW Soft Channel Group Selection ARTS (Auto Range Transpond System) DTMF Paging System ACCESSORIES & OPTIONS FVP-25 VH-130 F2D-8 VH-140 Basic Menu Mode Operation Available Soft Key Menu Functions No.7 GROUP (Group Select) No.8 SCAN (Scan Mode On/Off) No.9 DW (Dual Watch On/Off) No.10 TA (Talk Around) No.11 ENCR (Encryption) MIC/SP MIC/SP Monitor CLONE Destination Moni- tor Number of Channels: Frequency Range: Channel Spacing: PLL Steps: Power Supply Voltage: CAUTION Non-designatedparts are available only as part of a designated assembly Page Page Overview Circuit Configuration by Frequency Receive Signal Path Front-endRF Amplifier First Mixer Transmit Signal Path Microphone Amplifier Noise Canceling Microphone Circuit Drivers and Final Amplifiers Automatic Transmit Power Control PLL Frequency Synthesizer Miscellaneous Circuits Push-To-TalkTransmit Activation Introduction Required Test Equipment Alignment Preparation and Precautions Important Note The alignment tool outline Alignment Tool Menu Common Data ENTER (0) Common Tx : space (0) Common Tx (1) Common RX: (1) Common Rx (1) Common Rx (1) Common Rx Channels (2) Channels TX: (2) Channels Tx (2) Channels Tx (2) Channels Tx Connector Pinout Diagram AF Test Adapter Schematic Note