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Documentation

NullShield GNSS Documentation.

Preliminary datasheet, connector pinout, key electrical ratings, and a step-by-step setup guide for the NullShield GNSS program.

Key Ratings Datasheet Pinout Setup Guide
Key Electrical & Mechanical Ratings
Max Voltage
3.3V (logic supply)
Max Current
350mA peak
IP Rating
IP67 (antenna module)
Weight
24g
Datasheet

NullShield GNSS Datasheet

NullShield GNSS — Full Datasheet
Available on request · controlled distribution
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Pinout Diagram

Connector Map

PINSignalFunction
1VCC3.3V supply input
2GNDCommon ground
3UART_TXNMEA/UBX telemetry transmit
4UART_RXNMEA/UBX telemetry receive
5PPSPulse-per-second timing output
6ANTRF antenna feed (SMA/coax)
Setup Guide

Hardware & Software Installation

Follow each step in order. Use Next Step to move forward once a step is complete.

1Hardware Installation 2Software Installation 3Firmware & Configuration 4First Power-On
Step 1 — Hardware Installation

Mount the antenna and wire the module

  1. Mount the GNSS antenna module with a clear sky view, away from VTX and motor noise sources.
  2. Route the coax feed to the ANT connector, keeping runs as short as practical.
  3. Wire VCC, GND, and UART to the host flight controller.
Step 2 — Software Installation

Install the configuration utility

  1. Install the NullShield configuration utility for your OS.
  2. Connect via a UART-to-USB adapter.
  3. Confirm the module enumerates and reports its firmware version.
Step 3 — Firmware & Configuration

Select constellations and jamming profile

  1. Select your constellation set: GPS, GLONASS, Galileo, and/or BeiDou.
  2. Enable the adaptive jamming-rejection profile appropriate to your mission.
  3. Set PPS timing output mode for host synchronization.
Step 4 — First Power-On & Verification

Verify fix quality before enabling countermeasures

  1. Verify a clear-sky fix (<0.6m CEP) before enabling jamming-rejection mode.
  2. Run the built-in jam-simulation self-test.
  3. Confirm the host flight controller receives a valid NMEA/UBX stream.
Step 1 of 4

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