ORBCOMM OG2 Modem Integration Manual
iv
Table of Contents
1.
INTRODUCTION .............................................................................................................................................. 6
1.1
R
EFERENCES
...................................................................................................................................................... 6
2.
PHYSICAL DESIGN ........................................................................................................................................... 7
2.1
M
ODULE
D
IMENSIONS
......................................................................................................................................... 7
2.2
I
NTERFACE
......................................................................................................................................................... 8
2.2.1
User Connector Pin Description Table .................................................................................................... 8
2.2.2
User Connector Mechanical Information ............................................................................................. 10
2.2.3
Board Connection ................................................................................................................................. 12
2.2.4
RF Connections ..................................................................................................................................... 12
3.
RADIO FREQUENCY SECTION ........................................................................................................................ 14
3.1
VHF
T
RANSMITTER
........................................................................................................................................... 15
3.1.1
Transmit Modulation ........................................................................................................................... 15
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
VHF
R
ECEIVER
................................................................................................................................................. 17
3.2.1
Receive Modulation ............................................................................................................................. 17
3.2.2
Minimum Detectable Signal ................................................................................................................. 17
3.2.3
Acquisition Frequency Range ............................................................................................................... 17
4.
POWER SUPPLY ............................................................................................................................................ 17
4.1
P
OWER
U
SAGE
P
ROFILE
..................................................................................................................................... 17
4.2
V
ARIATIONS IN
I
NPUT
P
OWER
............................................................................................................................. 18
4.3
D
IP
,
I
NTERRUPTIONS
,
S
URGES
,
F
AST TRANSIENTS
.................................................................................................... 19
4.3.1
Dip & Interruptions .............................................................................................................................. 19
4.3.2
Fast Transients ..................................................................................................................................... 20
5.
ENVIRONMENTAL SPECIFICATIONS AND COMPLIANCE ................................................................................ 21
5.1
O
PERATIONAL
T
EMPERATURE
.............................................................................................................................. 21
