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Getting Started
80-99208-1 Rev. D 1-7
The GSP-1620 modem is a bare board “sandwich” stack of
Circuit Card Assemblies (CCA) containing two boards:
• Globalstar RF board — includes the LNA, RF power amp,
upconverters and downconverters, TCXO, synthesizers,
and the remaining power electronics.
• Globalstar Digital board — includes the processor, the
modem, and some of the power management electronics.
QUALCOMM offers the GSP-1620 modem without a
mechanical enclosure, anticipating that OEMs will integrate
and package the modem with the end-user’s application.
The GSP-1620 modem operates in the “Globalstar (or
satellite) data mode only,” as opposed to the GSP-1600
Tri-Mode Phone, which has additional terrestrial cellular
(analog and digital) and voice capabilities. The GSP-1620
modem is powered by an external power source provided by
the user.
A weatherproof Dielectric Resonator Antenna (DRA),
sometimes referred to as an Outdoor Unit (ODU), comes with
each modem. OEMs provide antenna cables (SMA to MCX
connectors), to meet customer antenna-cable length needs.
A single DB-25 (male) connector is used for the user interface
port. The DB-25 carries DC power, as well as the Data and
Control RS-232 signals, between the SCADA application
(DTE) and the modem (DCE).
A Diagnostic port on the modem allows network provisioning
(service programming) and software upgrades.
What’s in the Modem Integrator’s Kit?
Your GSP-1620 Modem Integrator’s Kit (MIK) is designed to
help you rapidly develop user applications for GSP-1620
modems.
Table 1-2 shows the items contained in your GSP-1620
Modem Integrator’s Kit (QUALCOMM part number: MCN
65-82317-1).