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Jackson Labs LTE-Lite User Manual

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LTE-Lite
User
Manual
Document:
80200522
Version:
1.4
Date:
25 June, 2020

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Summary of Contents for Jackson Labs LTE-Lite

  • Page 1 (tm) LTE-Lite User Manual Document: 80200522 Version: Date: 25 June, 2020...
  • Page 2 LTE-Lite User Manual Copyright © 2013 to 2020 Jackson Labs Technologies, Inc.

  • Page 3: Table Of Contents

    2.2 Connector, Buttons and Switches on the Evaluation Board ... . 11 2.3 LTE-Lite SMT Module usage ..... . . 13 2.3.1 LTE-Lite SMT Module Minimum Required Setup .
  • Page 4 LTE-Lite User Manual © 2020 Jackson Labs Technologies, Inc.

  • Page 5: Introduction

    Phase Noise. The LTE-Lite GPSDO is available as an SMT module, or mounted onto the LTE-Lite Evaluation Board with easy access to relevant signals via a host of connectors and switches.

  • Page 6: General Safety Precautions

    1.2.1 Grounding To avoid damaging the sensitive electronic components in the LTE-Lite GSPDO kit or board always make sure to discharge any built-up electrostatic charge to a good ground source, such as power supply ground. This should be done before handling the circuit board or anything connected to it, i.e.

  • Page 7: Usage Instructions

    Usage Instructions 2.1 Powering Up the Evaluation Board The LTE-Lite Evaluation Board is essentially a plug-and-play product that only requires a power source and a GPS antenna to be connected to start generating highly-accurate output frequency and 1PPS signals that are phase and frequency aligned to UTC (USNO) and thus allow NIST-tracability.

  • Page 8: Airflow Warning

    Figure 2.1 LTE-Lite Evaluation Board with LTE-Lite Module 2.1.1 Airflow Warning The LTE-Lite SMT module and thus the LTE-Lite Evaluation Board are very sensitive to airflow. This includes airflow from convection, walking past the unit, or Air Conditioning systems. For optimal performance the user must insure that the unit is shielded from any airflow by placing the unit into an enclosure (for example Hammond PN: 1455C801BK).

  • Page 9: Supplied Accessories

    2.1.3 USB Serial Port The LTE-Lite Evaluation Board has an internal RS-232 to USB serial port adaptor. This allows the unit to be directly connected to a PC’s USB port, from which it will receive power and to which it will send serial output sentences with no external RS-232 to USB adaptor is required.

  • Page 10: Typical Phase Noise And Adev Plots

    2.1.5 Typical Phase Noise and ADEV Plots The following plot shows a typical ADEV plot for the LTE-Lite Evaluation Board. The unit had been operating for 5+ days, has not been moved or vibrated in any way, and was completely shielded from airflow by placing the unit into an airtight enclosure.
  • Page 11 The following plot shows a typical Phase Noise plot of the TCXO buffered RF output for the LTE-Lite Evaluation Board. The unit had been operating for 1 day, and was completely shielded from airflow by placing the unit into an airtight enclosure.

  • Page 12: Evaluation Board Mechanical Dimensions

    LTE-Lite User Manual 2.1.6 Evaluation Board Mechanical Dimensions Figure 2.6 Mechanical dimensions © 2020 Jackson Labs Technologies, Inc.

  • Page 13: Lte-Lite Smt Module Mechanical Dimensions

    2.1.8 LTE-Lite Evaluation Board Schematics The following schematics may be used as an example of how to connect the LTE-Lite SMT Module, and to maximize the features of the LTE-Lite SMT Module. Please note that IC U4 is the actual LTE-Lite SMT module.
  • Page 14 LTE-Lite User Manual Figure 2.8 Schematics of LTE-Lite Evaluation Board © 2020 Jackson Labs Technologies, Inc.

  • Page 15: Connector, Buttons And Switches On The Evaluation Board

    LTE-Lite User Manual 2.2 Connector, Buttons and Switches on the Evaluation Board Table 2.1 shows the LTE-Lite Evaluation Board connectors, buttons, switches, and LEDs. Table 2.1 LTE-Lite Evaluation Board connectors, buttons, switches, and LEDs Name Function Specification Pinning/Usage Optional External 5V DC +/-20%, <0.08A, <10mVac...
  • Page 16 Lights up when power is Blinks when GPS fixes are Fix indicator applied, and blinks when GPS properly being received, and unit fixes are being received is powered-on. Resides on LTE-Lite SMT module near antenna connector © 2020 Jackson Labs Technologies, Inc.

  • Page 17: Lte-Lite Smt Module Usage

    Pin 16: +3.3V, 50mA max 2.3 LTE-Lite SMT Module usage The LTE-Lite SMT Module by itself is designed to be soldered into a customer PCB using standard SMT pick-and-place procedures. The SMT module is designed as a 0.032 inches thin single-sided PCB with 32 castellated solder pads on the bottom and on the sides of the module.

  • Page 18: Using The Lte-Lite Smt Module With External Tcxos

    Figure 2.9 Minimum required setup for the LTE-Lite SMT Module 2.3.2 Using the LTE-Lite SMT Module with external TCXOs The following schematics shows how to connect an external 3.0V TCXO to the LTE-Lite SMT Module using the internal low-noise 3.0V regulator output to power the external TCXO. The internal TCXO and TCXO buffer are disabled by pulling the DISABLE-TCXO pin 8 of the module high, ©...
  • Page 19 50K Ohms or higher resistance to ground on their EFC pins. The EFC output pin 1 has a voltage range of 0V to 3.0V an requires external oscillators with positive frequency slope. Figure 2.10 Connecting an external TCXO to the LTE-Lite SMT Module © 2020 Jackson Labs Technologies, Inc.

  • Page 20: Using The Lte-Lite Smt Module Synthesized Frequency Output

    2.3.3 Using the LTE-Lite SMT Module Synthesized Frequency Output The following schematics show an example of how to use the un-buffered synthesized RF output of the LTE-Lite SMT Module. Figure 2.11 Using the synthesized frequency output of the LTE-Lite SMT Module © 2020 Jackson Labs Technologies, Inc.

  • Page 21: Adding A Usb Output To The Lte-Lite Smt Module For Ntp Applications

    The following schematics show an example of how to connect a USB serial adaptor chip to the LTE-Lite SMT Module to supply NMEA PVT/status information and a 1PPS pulse to NTP applications. Figure 2.12 Adding a USB output to the LTE-Lite SMT Module...

  • Page 22: Smt Module Power Connection

    +30dB antenna amplification at GPS L1 frequencies. 2.3.7 1PPS Module outputs The LTE-Lite SMT Module provides a GPS raw 1PPS CMOS pulse on pin 15 with sawtooth present, and a clean TCXO-generated, sawtooth-removed, UTC(GPS) phase-locked 1PPS output on pin 4.

  • Page 23: System Reset

    80MHz 2.3.9 System Reset The LTE-Lite SMT Module contains internal reset circuitry and thus does not require an external reset input. Pin 23 of the module is an open-collector reset input that can be pulled to ground to initiate a manual system reset of the module. This pin is typically left un-connected, or it can be connected to a reset switch.

  • Page 24: 10Module Serial Io Pins

    11 (default is internally pulled-up for 1Hz update rate). 2.3.11 Module IO Pinout The LTE-Lite SMT Module has 32 SMT pads arranged in a standard IC pinout pattern. The following drawing shows the pinout of the module. Figure 2.13 Pinout of the LTE-Lite SMT Module (Top View)
  • Page 25 LTE-Lite SMT Module pin description. All IO pins are internally pulled-up or pulled down so that the user does not have to terminate any unused pins. All unused pins can be left floating. Table 2.3 LTE-Lite SMT Module IO pin description Name Function...
  • Page 26 WARNING: DO NOT CHANGE THE PERMANENTLY. SETTING OF THIS PIN WITH POWER APPLIED TO THE UNIT, THIS MAY CORRUPT THE FLASH OF THE GPS RECEIVER PERMANENTLY. GND3 Ground Ground Ground. Connect all module grounds together © 2020 Jackson Labs Technologies, Inc.
  • Page 27 TCXO Warmup 3.3V CMOS (warmup), 0V 3.3V CMOS output indicating TRAINING Indicator (warmup done) TCXO warmup after power-on. Can drive an LED with up to 10mA. Stays high for about 1 minute after reset © 2020 Jackson Labs Technologies, Inc.

  • Page 28: Connecting A Gps Antenna

    Caution: use a Lightning Arrestor on your Antenna setup. The unit will provide +3.3V DC to the external antenna with up to 60mA of current. The LTE-Lite Evaluation Board GPS receiver includes a 65 channel high-sensitivity GPS receiver with very fast lock time that supports QZSS/WAAS/EGNOS/MSAS Satellite Based Augmentation Systems (SBAS).

  • Page 29: Usb Serial Connection

    NTP or GPSD. • Connect the PC via the USB cable and connector, attaching the LTE-Lite Evaluation Board to your PC’s Hyperterminal, TeraTerm, or a NMEA compatible program such as the uBlox u-center application. Please initialize your PC application software to the proper COM port (automatically assigned by Windows) and configure the application software for 38400 Baud, 8 bits, no parity, 1 stop bit, and no flow control where applicable.

  • Page 30: Lock Status Definition

    If the run-time is < 300 seconds HEALTH STATUS |= 0x8 If the GPS is in holdover > 60s HEALTH STATUS |= 0x10 If the Frequency Estimate is out of bounds HEALTH STATUS |= 0x20 © 2020 Jackson Labs Technologies, Inc.
  • Page 31 If the TCXO voltage is too high HEALTH STATUS |= 0x40 If the TCXO voltage is too low HEALTH STATUS |= 0x80 For the first 2 minutes after a phase-reset, or a coarse-DAC HEALTH STATUS |= 0x200 change © 2020 Jackson Labs Technologies, Inc.
  • Page 32 LTE-Lite User Manual © 2020 Jackson Labs Technologies, Inc.

  • Page 33: Certification And Warranty

    Except for products returned to Customer from another country, Jackson Labs Technologies, Inc. shall pay for return of products to Customer. If Jackson Labs Technologies, Inc. is unable, within a reasonable time, to repair or replace any product to condition as warranted, the Customer shall be entitled to a refund of the purchase price upon return of the product to Jackson Labs Technologies, Inc.

  • Page 34: Exclusive Remedies

    LTE-Lite User Manual PURPOSE. No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted by this document. Jackson Labs Technologies, Inc. products are not intended for use in medical, life saving, or life sustaining applications.

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