AL3A-RM User Guide Version B
Document Number: 451-93156-002B
170 of 172
A
PPENDIX
K:
D
ESIGN
S
PECIFICATIONS
K.1
M
ECHANICAL
S
PECIFICATIONS
Dimensions:................................................................102 mm x 61 mm x 24 mm (4.0” x 2.43” x
0.95”)
Weight: .......................................................................198 g (7.0 ounces)
Multi-interface connector:.........................................25-pin male D-sub
Iridium antenna: ........................................................TNC female connector
SIM chip reader: .........................................................Located beneath a cover plate on top of the
A3LA-RM
Status display: ............................................................Power, Iridium, and Status
Cooling: ......................................................................Convection
Enclosure: ...................................................................Aluminum/EMI shielding
K.2
RF
S
PECIFICATIONS
Operating frequency: .................................................1616 to 1626.5 MHz
Duplexing method: ....................................................TDD
Multiplexing method: ...............................................TDMA/FDMA
Link margin: ...............................................................12 dB average
Average power during a transmit slot (max): ............7 W
Average power during a frame (typical): ...................0.6 W
Receiver sensitivity at 50Ω (typical):..........................–118 dBm
K.3
E
LECTRICAL
S
PECIFICATIONS
Main input voltage range: ..........................................+4.0 V to +5.4 V or +5.0 V to +32.0 V
Average standby current: ..........................................~130 mA @ 5.0 VDC (with +5.0 V to +32.0 V
setup)
Average data call current: ..........................................~400 mA @ 5.0 VDC (peak of 2 A)
Note:
The power requirements apply to DC power measured at the A3LA-RM multi-interface
connector input. The average data call current may vary depending on the field of view
between the modem antenna and the Iridium satellite.