GM47R5/GM48R5 RADIO DEVICES
10
LZT 123 8020 R1B
GM48r5
GSM 850
GSM 1900
Frequency Range (MHz)
TX: 824-849
RX: 869-894
TX: 1850-1910
RX: 1930-1990
Channel spacing
200 kHz
200 kHz
Number of channels
124 carriers *8 time slots
299 carriers *8 time slots
Modulation GMSK
GMSK
TX Phase Accuracy
< 5º RMS phase error (burst)
< 5º RMS phase error (burst)
Duplex spacing
45 MHz
80 MHz
Receiver sensitivity at
antenna connector
< –102 dBm
< –102 dBm
Transmitter output power at
antenna connector
Class 4
2W (33 dBm)
Class 1
1 W (30 dBm)
Automatic hand-over between GSM 850 and GSM 1900
2.3.2
Short Message Service
The radio device supports the following SMS services:
•
Sending; MO (mobile-originated) with both PDU (protocol
data unit) and text mode supported.
•
Receiving; MT (mobile-terminated) with both PDU and text
mode supported.
•
CBM (cell broadcast message); a service in which a
message is sent to all subscribers located in one or more
specific cells in the GSM network (for example, traffic
reports).
•
SMS STATUS REPORT according to GSM 03.40.
The maximum length of an SMS message is 160 characters
when using
7-bit encoding. For 8-bit data, the maximum length is 140
characters. The radio device supports up to six concatenated
messages to extend this function. Concatenation is disabled if
CNMI 3,2 is set (See the AT Commands Manual for further
details).
2.3.3
Voice Calls
The radio device offers the capability of MO (mobile originated)
and MT (mobile terminated) voice calls, as well as supporting
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