Hardware Development Guide of Module Product
5
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2.2
Function Overview
2.2.1 Baseband Function
When module product ZM8620 and the system board connects, there are the following main
signal groups: USB signal, SIM card signal, radio frequency switch control signal, power on and
overall system resetting signal, power supply and ground. At the same time, ZM8620 has the
main antenna interface and diversity antenna interface, and GPS antenna interface.
Main
Antenna
USB
SIM card
POWER
GND
GPIO
UART
Wakeup &
query status
signal
GPS
Antenna
ZM8620
PCIE LTE wireless
Internet access
module
Diversity
Antenna
Figure 2-2 System Connection Diagram
2.2.2 Radio Frequency Function
The radio frequency function of ZM8620 can be viewed from the aspect of over-the-air wireless
bearer network, frequency band, whether receive diversity feature is supported.
(a) Support LTE FDD 2100/1900/1700/850/900/2600/700 MHz;
(b) Support LTE TDD Band 38;
(c) Support UMTS 850/900/1700/1800/1900 MHz;
(d) Support GSM 850/900/1800/1900 MHz;
(e) Support the diversity receives;
The operating frequencies of ZM8620 is as shown in Table.
Table 2-2 Product Operating Frequency Band
Operating
Frequency Band
Uplink Frequency Band (Uplink)
Downlink Frequency Band
(Downlink)
UMTS850
824 MHz - 849 MHz
869 MHz - 894 MHz
UMTS900
880 MHz
— 915 MHz
925 MHz
— 960 MHz
UMTS1700
1710 MHz
— 1755MHz
2110 MHz
— 2155MHz
Summary of Contents for ZM8620
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