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Summary of Contents for ORBCOMM OG2
- Page 1 ORBCOMM Generation 2 (OG2) Modem Consolidated Operational Description Document Number: Revision: Initial Date: October 27, 2015...
- Page 2 This publication, or any part thereof, may not be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying, recording, storage in an information retrieval system, or otherwise, without prior written permission by ORBCOMM, Inc. 395 W Passaic Street, Suite 325, Rochelle Park, NJ 07662 USA Phone 703-433-6329.
- Page 3 Document History Version Issued By Issue Date Comments ORBCOMM October 2015 Initial ORBCOMM OG2 Modem Integration Manual...
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Page 4: Table Of Contents
SAGE ROFILE ..........................18 ARIATIONS IN NPUT OWER ....................19 NTERRUPTIONS URGES AST TRANSIENTS 4.3.1 Dip & Interruptions ..........................19 4.3.2 Fast Transients ............................. 20 ENVIRONMENTAL SPECIFICATIONS AND COMPLIANCE ................21 ..........................21 PERATIONAL EMPERATURE ORBCOMM OG2 Modem Integration Manual... - Page 5 FIGURE 5-3 VOLTAGE FALL TIMES VS. INPUT POWER SWITCHED OFF ................ 20 List of Tables TABLE 2-1 PIN DEFINITION ............................10 TABLE 2-2 U. FL CONNECTORS ............................ 13 TABLE 5-1 ENVIRONMENTAL SPECIFICATIONS AND COMPLIANCE ................21 ORBCOMM OG2 Modem Integration Manual...
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Page 6: Introduction
There will be significant differences between OG1 and OG2 such that current OG1 subscriber communicators herein referred to as “modem” will not be able to use the portion of the OG2 satellites dedicated to OG2 functionality. It is envisioned that the next versions of modems will be able to seamlessly switch between the two service sets. -
Page 7: Physical Design
Physical Design 2.1 Module Dimensions Overall dimensions and weight of the OG2 modem are indicated below. RF connections will require space for routing miniature coax cables to antenna port locations. Mechanical Dimensions Length 70 mm Width 40 mm Height 9.5 mm... -
Page 8: Interface
GPIO TAMPER 1 Input, 1.8v Internal PU Input Ground EXT INT2 Input, 1.8v External Interrupt TX CAN-0, Capacitive Touch, GPIO1/FTM/CAN TX Input/Output 1.8v GPIO Input Ground UART 4 RX Input, 1.8v RX, User serial port ORBCOMM OG2 Modem Integration Manual... - Page 9 SOUT, SPI #0 data out SD Card data #3, SPI-1 data in, SDHC0_D3, SPI1_SDA Input/Output 1.8v GPIO SPI0, SIN Input, 1.8v SIN, SPI #0 data in SD CARD DETECT Input, 1.8v SD Card detection, GPIO Input Ground ORBCOMM OG2 Modem Integration Manual...
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Page 10: User Connector Mechanical Information
PCB area for most components. Mechanical drawings are provided below. This drawing specifies the mechanical position of the User connector with respect to the mounting holes. ORBCOMM OG2 Modem Integration Manual... - Page 11 34.00 Figure 2-1 Board Dimensions The OG2 Modem module inserts into the connector at an angle, and is held in place with screws and standoffs that match the connector height. Ideally, the standoffs and screws would interface to a ground connection on the host board.
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Page 12: Board Connection
2/56 thread, 3/16” length, 18-8 stainless steel, pan-head, Phillips screws 2.2.4 RF Connections The GPS and ORBCOMM VHF RF connectors are Hirose U.FL series parts. There are several mating plugs available, allowing different coaxial cable diameters. Cable assemblies and plug adapters are available to transition to several standard miniature RF connector types. -
Page 13: Table 2-2 U. Fl Connectors
The image below indicates the proper location for each port. There are two modem models, with and without GPS and accelerometer. If the GPS antenna port and uBlox circuit are installed, then the unit has GPS functionality uBlox GPS Figure 2-3 Connector Location ORBCOMM OG2 Modem Integration Manual... -
Page 14: Radio Frequency Section
Express Tamper Interface Wide Range 3 Axis JTAG Switching Accelerometer Supply 3v -15v Figure 3-1 Modem Block Diagram The different ports are: Power Supply. Capable of handling a wide range of DC input voltages. ORBCOMM OG2 Modem Integration Manual... -
Page 15: Vhf Transmitter
The graph below shows the measured RF power output as the input is increased from 2.8 volts DC to 15 volts DC. Values provided below 6 VDC are provided for reference only. ORBCOMM’s integration manual specifies an input voltage no lower than 6 VDC. -
Page 16: Frequency Control
Figure 3-2 RF Output Power vs. input Voltage 3.1.5 Frequency Control Frequency control is provided by the ORBCOMM System. The modem transmits an initial 7 bit (8 bits including the reference bit required by SDPSK modulation) burst to the satellite. Initial specifications published almost 20 years ago required this burst to arrive within ±1500 Hz. -
Page 17: Vhf Receiver
The transmitter uses Symmetric Differential Phase Shift Keying at 4800 bits per seconds. 3.2.2 Minimum Detectable Signal The modem receives ORBCOMM downlink signals with at -120 dBm or better under all operational situations with a BER no worse than 1 x 10 3.2.3 Acquisition Frequency Range... -
Page 18: Variations In Input Power
The pink line indicates the rise time of the receiver section. The blue line indicates the rise time of the transmitter section, current draw is increased to maximum levels approximately 15 ms after this ramp up time. ORBCOMM OG2 Modem Integration Manual... -
Page 19: Dip, Interruptions, Surges, Fast Transients
If the processor is writing a new message in to memory during a power interruption, a protocol will not provide an acknowledgement so the user processor will retry. The malformed message will be ORBCOMM OG2 Modem Integration Manual... -
Page 20: Fast Transients
All data lines are protected with low pass RF filters and ESD protection. The filters are designed to meet IEC61000-4-2 level 4, and provide up to 40 dB of EMI protection from 800 MHz to 3GHz. The Secure Digital High Capacity (SDHC) memory card interface is designed to meet JESD 84A43 specifications. ORBCOMM OG2 Modem Integration Manual... -
Page 21: Environmental Specifications And Compliance
EN 300 832 Sec. 9 Table 5-1 Environmental Specifications and Compliance 5.1 Operational Temperature Efforts should be made to keep the modem from operating at temperatures exceeding 80C. This may require additional venting and/or forced air. ORBCOMM OG2 Modem Integration Manual...
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