MITSUBISHI ELECTRONICS AMERICA, INC.
ST200 Series Technical Support Manual
87
January 2000
11.0 System Specifications
Communication Modes
Voice
Full Duplex Digital Voice at 6400 bps
Net Radio (option)
Half Duplex Digital Voice at 6400 bps
Data
1200 bps/2400 bps/4800 bps / (AT Command Set)
System Specifications
General:
Transmit Frequencies
1626.5 - 1660.5 MHz
Receive Frequencies
1525.0 - 1559.0 MHz
Polarization
Right - Hand Circular (RHC)
Channel Spacing
6 kHz
Communications (MET-C and FES-C) and GC-S Outbound Signaling Channel:
Channel Rate
6.75 kbps
Modulation
DQPSK
Access Method
SCPC/FDMA for Communications Channels
TDM for GC-S Channel
Voice CODEC
Improved Multi-Beam Excitation (IMBE)
@
6.4 kbps
Scrambler
Random Pseudo Noise (PN) generator with 15 stages
FEC Encoder
Convolutional, Rate 1/2, k=7
FEC Decoder
Viterbi
Interleaving
Block - data communications and all signaling
MT-ST and MT-SR Inbound Signaling Channel:
Channel Rate
3.375 kbps
Modulation
Differential Phase Shift Keying (DPSK)
Access Method
TDMA - MET-ST
Slotted Aloha - MET-SR
Scrambler
Random Pseudo Noise (PN) generator with 15 stages
FEC Encoder
Convolutional, Rate 1/2 and 3/4
FEC Decoder
Viterbi
Interleaving
Block
ST211 (Land Mobile) Performance Specifications
G/T
-16 dB/K (15
o
to 60° elevation)
EIRP
12.5 - 16.5 dBW
Turning Rate
60
°
/sec max.
Turning Acceleration
20
°
/sec max.
ST221M (Fixed Site) Performance Specifications
G/T
-5 dB/K (5
o
to 50° elevation)
-4 dB/K (50
o
to 90° elevation)
EIRP
12.5 - 16.5 dBW
ST211 (Land Mobile) Power Specifications
Power Consumption
Primary DC Voltage
12V DC nominal (11.5 to 15.6V range)
Transmit
4.5 A
Receive
1.8 A
ST221M (Fixed Site) Power Specifications
Power Consumption