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QRP Labs QLG2-SE Manual

Gps/gnss receiver module
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This manual is for the QLG2-SE GPS/GNSS Receiver module
Contents
1. Introduction....................................................................................................................................................2
2. Getting to know your QLG2-SE.......................................................................................................................2
3. Assembly.........................................................................................................................................................5
3.1 Assembly for basic operation....................................................................................................................5
3.2 Use with QCX, U3S, Clock, VFO, ProgRock etc. kits...................................................................................6
3.3 Status LEDs...............................................................................................................................................6
3.4 Fitting an ultracap (a.k.a. supercap)..........................................................................................................7
3.5 6-pin interface header..............................................................................................................................8
3.6 Interface configuration.............................................................................................................................9
4. Circuit diagram (schematic) and description..................................................................................................9
5. Testing..........................................................................................................................................................12
6. Resources.....................................................................................................................................................13
7. Document Revision history...........................................................................................................................13
QLG2-SE manual 1.00
QLG2-SE
GPS/GNSS
Receiver
1

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Summary of Contents for QRP Labs QLG2-SE

  • Page 1: Table Of Contents

    QLG2-SE GPS/GNSS Receiver This manual is for the QLG2-SE GPS/GNSS Receiver module Contents 1. Introduction..............................2 2. Getting to know your QLG2-SE........................2 3. Assembly.................................5 3.1 Assembly for basic operation........................5 3.2 Use with QCX, U3S, Clock, VFO, ProgRock etc. kits...................6 3.3 Status LEDs...............................6 3.4 Fitting an ultracap (a.k.a.

  • Page 2: Introduction

    QLG1 with higher performance and highly flexible features: QLG2-SE is a reduced functionality version of the QLG2. Compared to QLG2, it lacks the USB to Serial converter interface and the capability to use an optional LCD module.
  • Page 3 Kit contents: Know your QLG2: QLG2-SE manual 1.00...
  • Page 4 • of the board, if you would like a smaller board (53 x 37mm) 4-pin interface: pads for QCX, U3S etc: the standard QRP Labs 4-pin connector: • +5V, Gnd, Serial Data (TxD) and 1PPS. There are two 4-pin connectors, they are wired in parallel, so that you can use either one depending on whether or not you break apart the PCB (see above).

  • Page 5: Assembly

    Straight out of the box, if you simply install the coaxial connector and plug in the antenna, the QLG2-SE is backwardly compatible by default with the former QLG1 kit. It is therefore directly compatible with all other QRP Labs kits: QCX-series CW transceivers (QCX, QCX+ and QCX-mini) •...

  • Page 6: Use With Qcx, U3S, Clock, Vfo, Progrock Etc. Kits

    Use with QCX, U3S, Clock, VFO, ProgRock etc. kits In this application, you need only plug in the antenna coax SMA connector and the QLG2-SE is ready to use. It is entirely compatible with the former QLG1 kit and the 4-way pin header pads at the right side of the board can be used in the same way as a QLG1 kit.

  • Page 7: Fitting An Ultracap (A.k.a. Supercap)

    Fitting an ultracap (a.k.a. supercap) There is a place on the QLG2-SE board to fit an ultracap (a.k.a. supercap). This is a lot more reliable means of providing backup power, than the little rechargeable battery on the QLG1.

  • Page 8: 6-Pin Interface Header

    6-pin interface header At the center of the QLG2-SE board’s bottom edge, is a 6-pin header that provides access to the power supply rails, the GNSS outputs, and the Serial port of the USB to Serial converter. The 1pps, Serial data, TXD and RXD signals can be configured to be either 2.8V/3.3V logic level, or 5V logic level.

  • Page 9: Interface Configuration

    LOWER: 2.8V logic level 4. Circuit diagram (schematic) and description In the above circuit below, the position of the default jumper wires, which are implemented by tinned copper traces on the PCB underside, are indicated with a thick red line. QLG2-SE manual 1.00...
  • Page 10 QLG2-SE manual 1.00...
  • Page 11 Inductor 2012 LED1 0603 LED2 Yellow 0603 LED3 Green 0603 E108-GN01 GNSS Module 16 x 12 mm BSS123 Transistor SOT23 R1, R3, R4, R5, R6, Resistor 0603 R8, R9 10-ohms Resistor 0603 Resistor 0603 2.2K Resistor 0603 QLG2-SE manual 1.00...

  • Page 12: Testing

    Level conversion from the 2.8V output of the E108-GN01 module, to the 5V logic levels required by other QRP Labs kits, is done using a 74ACT08 quad AND-gate chip; it is not used as an AND gate (all gates have their two inputs tied together), it is simply used as a logic level converter.

  • Page 13: Resources

    6. Resources For updates relating to this kit please visit the QRP Labs QLG2-SE kit page http://qrp- labs.com/ qlg2se . This web page also contains links to the E108-GN01 datasheet and the GK9501 command reference For any questions regarding the assembly and operation of this kit please join the QRP Labs group, see https://groups.io/g/qrplabs...

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