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ORBCOMM Generation 2
(OG2) Modem Consolidated
Operational Description

Document Number:

Revision: Initial

Date: October 27, 2015

Summary of Contents for OG2

Page 1: ...ORBCOMM Generation 2 OG2 Modem Consolidated Operational Description Document Number Revision Initial Date October 27 2015...

Page 2: ...nt in whole or in part may be reproduced stored transmitted or used for design purposes without the prior written permission of ORBCOMM This document contains technical information and descriptions of...

Page 3: ...ORBCOMM OG2 Modem Integration Manual iii Document History Version Issued By Issue Date Comments 1 ORBCOMM October 2015 Initial...

Page 4: ...3 1 2 Output Power 15 3 1 3 Output Power Variance 15 3 1 4 Transmitter Power 15 3 1 5 Frequency Control 16 3 1 6 Transmit Frequency 16 3 1 7 Occupied Bandwidth 16 3 1 8 Transmitter Designator 16 3 2...

Page 5: ...RE 2 1 MODEM BLOCK DIAGRAM 14 FIGURE 3 1 RF OUTPUT POWER VS INPUT VOLTAGE 16 FIGURE 4 1 MAXIMUM INPUT CURRENT VS INPUT VOLTAGE 18 FIGURE 4 2 INPUT VOLTAGE RISE TIMES 19 FIGURE 5 3 VOLTAGE FALL TIMES V...

Page 6: ...m This document should not be construed as a specification It is the basis for developing the ORBCOMM Generation 2 Subscriber Communicator Standards and Specifications In the interim this document can...

Page 7: ...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 Dimen...

Page 8: ...0 8 SPI1 PCS0 Output 1 8v 1 PCS0 SPI 1 chip select 9 GND Input Ground 10 SPI1 CLK Output 1 8v 1 CLK SPI 1 clock 11 Debug UART RX Input pin 6 user volt 3 RX UART 5 12 SPI1 SOUT Output 1 8v 1 SOUT SPI 1...

Page 9: ...v TOS 37 SDHC0_CLK ADC6 SPI1_CLK Input Output 1 8v SD Card clock 10 bit ADC SPI 1 CLK 38 ADC 1 N Input 1 8v 1 16 bit 1 7v TOS 39 SDHC0_CMD ADC7 SPI1_SIN Input Output 1 8v1 SD Card cmd ADC SPI 1 data i...

Page 10: ...y the voltage supplies to USER_DATA_POWER This voltage must be within the indicated voltage range 4 SATELLITE_IN_VIEW indicates that the receiver has currently locked on to a satellite downlink This i...

Page 11: ...odule 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 t...

Page 12: ...unting standoffs 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...

Page 13: ...ors 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...

Page 14: ...or Up to 1M Flash RTOS CMULT Frac N Modulator Direct Convertion Receiver Power Amplifier GPS 3 Axis Accelerometer Mini PCI Express Interface Wide Range Switching Supply 3v 15v JTAG USB CAN SD Card UAR...

Page 15: ...seconds 3 1 2 Output Power Output power is fixed at approximately 5 5 Watts 0 5 Watts Value is set at the time of manufacture and no further adjustments are made during operation 3 1 3 Output Power V...

Page 16: ...g corrections are provided to the modem based on the offset of the 7 bit burst All subsequent transmissions for this message session are corrected to within 50 Hz 3 1 6 Transmit Frequency The modem is...

Page 17: ...upply The power supply is designed to operate in an efficient mode at all times The processor has power available continuously When the processor is in a low power mode the quiescent current can be as...

Page 18: ...h demand events The circuit is short circuit protected has a soft start feature provides current limiting and a thermal shutdown feature The diagram below shows voltage rise time for the processor gra...

Page 19: ...n input voltage of 10 volts If the processor experiences an interruption the processor low voltage detection will operate The circuit warning mode will create a system interrupt service routine and pr...

Page 20: ...l Times vs Input Power Switched Off 4 3 2 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...

Page 21: ...Radiated Emissions EN 300 832 Sec 7 EN 300 721 V1 21 Annex C Unintentional Emissions EN 300 721 V1 21 Annex E Conducted Emissions EN 300 721 V1 21 Annex D RD Immunity EN 300 832 Sec 7 Transients Surg...