User guide

9522B & COM9522B Iridium Data Modem
4
Figure 3. 9522B Remote Station CS I/O Configuration
1.5 Where it works
Unlike other satellite systems the Iridium satellite system is located in a low polar
orbit, giving the system complete global coverage.
Their relatively low altitude (780 km) means that they are situated close to
transmitting modems and therefore require less transmission energy. Additionally, the
Iridium network consists of 66 satellites in eleven planes with an extra 6 satellite
reserved as backups. This redundancy potentially gives the iridium system excellent
reliability versus other systems that rely on two or three satellites.
2. Specifications
2.1 9522B Specifications
Power Supply
Operating: 4 – 32 VDC, 333 mA @ 12 VDC
Standby: 125 mA @ 12 VDC
Off: 0 mA (switched off via COM9522B)
Environmental
Operating temperature: -30°C to +70°C
Operating humidity: 25% to 75%
Storage temperature: -40°C to +85°C
Storage humidity: 93% (max)
RF Interface
Frequency range: 1616 MHz to 1626.5 MHz
Duplexing method: TDD (Time Domain Duplex)
Oscillator stability: ± 1.5 ppm
Input/output impedance: 50 ohms
Multiplexing method: TDMA/FDMA
SC12