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1. WELCOME

Thank you for purchasing the PI-REPEATER-1X, the first repeater controller board designed to be
powered by the ubiquitous Raspberry Pi computer systems.
This little piece of hardware mates to the Raspberry Pi just like any other daughter card you may have
used for the Raspberry Pi, Arduino, or other development platform.
This system enables you to have a variety of control options for your station, including simplex, duplex,
echo-link, etc.
We use multiturn potentiometers for fine adjustment of the audio, offer hardware pre-emphasis
filtering, active high / active low selects for each COS / CTCSS input signal, and have inputs tolerant to
18Vdc for the signals coming from the radio.
This board will work with any software that is capable of interacting with the sound card (I2S), and
GPIO (I2C required)) for radio interfaces. We recommend getting started with SVXlink, but the choice
is ultimately yours! Feel free to experiment and decide which system best fits your requirements.
WWW.ICS-CTRL.COM
PI-REPEATER-1X
HARDWARE REVISION 1.0
USER MANUAL FOR HARDWARE REV 1.0
06-JUN-2019
PAGE 1

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Summary of Contents for ICS PI-REPEATER-1X

  • Page 1: Welcome

    HARDWARE REVISION 1.0 1. WELCOME Thank you for purchasing the PI-REPEATER-1X, the first repeater controller board designed to be powered by the ubiquitous Raspberry Pi computer systems. This little piece of hardware mates to the Raspberry Pi just like any other daughter card you may have used for the Raspberry Pi, Arduino, or other development platform.
  • Page 2: Table Of Contents

    Analog to Digital Converter ......................9 GPIO Expansion ........................... 9 Getting Started with svxlink ......................10 Hardware Pin numbers (SVXlink based) ..................10 Advanced Configurations ......................10 Schematics ............................ 10 WWW.ICS-CTRL.COM USER MANUAL FOR HARDWARE REV 1.0 06-JUN-2019 PAGE 2...
  • Page 3: Hardware Introduction

    Selectable Flat Audio o Adjustable audio input level o Adjustable audio output level • Built in audio (input/output) • Analog to Digital Converter • GPIO expansion GPIO PORT 1 AUDIO WWW.ICS-CTRL.COM USER MANUAL FOR HARDWARE REV 1.0 06-JUN-2019 PAGE 3...
  • Page 4: Duplex Port Configurable Features

    Adjustable audio input level • Adjustable audio output level DUPLEX CHANNEL Input AUDIO Adjust Output AUDIO Adjust FLAT AUDIO SELECT CTCSS HI <-> LOW Output Amplifier Gain LOW <-> HI PIN 1 WWW.ICS-CTRL.COM USER MANUAL FOR HARDWARE REV 1.0 06-JUN-2019 PAGE 4...
  • Page 5: Input Audio Adjust

    CCW will ensure it is set correctly before moving it clockwise. The input audio should be approximately 0.4 volts peak to peak as measured at R2. WWW.ICS-CTRL.COM USER MANUAL FOR HARDWARE REV 1.0 06-JUN-2019...
  • Page 6: Flat Audio Select

    Note some parts have a very soft click, if you have one of these, ten full turns CW will ensure it is set correctly. When adjusting audio output, we suggest to only adjust this GAIN potentiometer and leave the OUTPUT ADJUST potentiometer at the default position. WWW.ICS-CTRL.COM USER MANUAL FOR HARDWARE REV 1.0 06-JUN-2019 PAGE 6...
  • Page 7: Ctcss Active High/Low

    9- GROUND Pin 1 is located in the bottom left corner as shown above in 10- GROUND (DB9 SHELL) section 3.1. When using ICS-CTRL provided DB9 connectors, will correspond with the brown wire. WWW.ICS-CTRL.COM USER MANUAL FOR HARDWARE REV 1.0...
  • Page 8: Output Audio Adjust

    USB sound card to have receive audio capability. The stereo audio is split into 2 mono channels, this board uses 1, it uses the RIGHT audio channel only. WWW.ICS-CTRL.COM USER MANUAL FOR HARDWARE REV 1.0 06-JUN-2019...
  • Page 9: Analog To Digital Converter

    When viewing the top of the board as shown, the orange arrow denotes pin 1 (GND) and counts up as you move from right to left. WWW.ICS-CTRL.COM USER MANUAL FOR HARDWARE REV 1.0 06-JUN-2019 PAGE 9...
  • Page 10: Getting Started With Svxlink

    Sample configurations will be provided on our group.io group and our website as we get them created. If you have a specific hardware need, please make the request to the group.io Group for ICS-Controllers or for SVXlink support, at the SVXlink support page respectively. Both pages have a good support community and we monitor both groups actively.

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