Product specifications

GSP-1620 Modem Product Specification
80-99240-1 Rev. D 5-11
Caution
OEMs must ensure that the output impedance of the power supply
sourcing DC power to the modem is always less than that of the
input impedance of the modem. Otherwise, a potential exists for
oscillations on the DC power line and the GSP-1620 modem will
not operate as designed.
Surge Protection
OEMs are responsible for ensuring that the input voltage
specification will never be exceeded.
Minimal transient protection is provided on the GSP-1620
modem board but this is intended only for low
energy/duration events (total transient power less than 1
kW). It is not intended to protect the modem in case of a
sustained over-voltage/lightning condition.
The use of a fuse is strongly recommended in the power
supply connecting to the GSP-1620 modem. The input surge
current requirements of the GSP-1620 modem are such that
a fuse with a minimum melting I
2
t rating of 0.02 A
2
seconds
will be sufficient.
EMI Filtering
Adequate conducted EMI filtering has already been provided
in the GSP-1620 modem to pass FCC and ETSI limits.
Additional filtering should not be necessary to meet these
requirements.
Caution
Should additional filtering be necessary, OEMs must take
precautions to ensure that the above criteria are not violated.
Please contact QUALCOMM Incorporated for further details in
such a case.