Huawei Technologies Co. Ltd UM01-HW 用户手册
MC703 CDMA EV-DO Wireless Module V100R001
Product Description
Issue 1.00 (2009-9-10)
Huawei Proprietary and Confidential
Page 23 of 40
Table 3-6 VCOIN pin for the input of the RTC power supply
PIN
Name
I/O
Function
Remarks
12 VCOIN
P Input
of
the
backup power
supply
supply
This pin is connected to a
button-type battery or a
capacitor of large capacitance.
button-type battery or a
capacitor of large capacitance.
If the RTC backup battery is not used, you can connect the pin to the primary power supply,
or use an electrolytic capacitor of large capacitance.
or use an electrolytic capacitor of large capacitance.
Table 3-7 Parameters of the RTC power supply pin
3.6 Reliability Features
Table 3-8 shows the conditions and results of the part mechanical reliability tests performed
on the UM01-HW UMTS module.
on the UM01-HW UMTS module.
Table 3-8 Conditions and results of the part mechanical reliability tests
Test Item
Test Condition
Test Standard
Random vibration
Frequency range: 5 Hz to 20 Hz, PSD: 1.0
m²/s
m²/s
3
;
Frequency range: 20 Hz to 200 Hz, –3
dB/oct;
dB/oct;
Three axial directions with one hour for each
direction
direction
IEC 68-2-6
Shock test
Half sine wave shock
Acceleration: 20 g
Shock period: 11 ms
Six axial directions with one shock in each
direction (± x, y, and z)
direction (± x, y, and z)
TIA/EIA 603 3.3.5
GB/T15844.2 4.1