China Aerospace Telecommunications Ltd
14
5 Specific characters of SAT-802S
5.1 Electrical specification
5.1.1 Electric parameters of main unit
Working voltage: 9V – 36V DC
Data transmission: Iridium SBD and GPRS dual-mode communication
Positioning: GPS
Max working current: <[email protected] (
Transient peak current 2W)
Working current in data t
ransceiving:
<350 [email protected]
Standby working current: <[email protected]
Working current when power saving: <[email protected]
Working temperature: -30
℃
~ +70
℃
Storage temperature: -40
℃
~ +85
℃
RH(relative humility): 5%
～
95% (no frosting)
Protection degree: IP66
5.1.2 Iridium parameters
Iridium module: Iridium 9602
Frequency: 1616
～
1626.5 MHz
Output power: 1.36W
Receiving sensitivity: -118.5dBm at 50W (typically)
Global coverage, no blind areas.
Duplex mode: TDD (Time Division Duplex)
Upstream data: maximum length is 340 bytes
Downstream: maximum length is 270 bytes
Transmission delay: 10 – 60 seconds (because of galaxy switch)
Input/Output impedance: 50Ω
Multiplex mode: TDMA/FDMA
Iridium antenna and interface: external antenna, SMA interface
Antenna gain: 2dBi
5.1.3 GSM parameters
GSM modules: SIMCOM SIM900
GSM/GPRS receiving frequency: 850/900/1800/1900MHZ quad-band
