RIM 1802G, Руководство интегратора

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Chapter 3: Setting up the Interface and Test Board
26 RIM OEM Radio Modem for GSM/GPRS Wireless Networks
Interface and Test Board components
The RIM Interface and Test Board provides a standard RS-232 serial interface between a computer
and the radio modem. The Interface and Test Board enables you to connect the RIM OEM Radio
Modem for GSM/GPRS Wireless Networks to a standard computer using a COM port or to a
terminal device using a RS-232 serial port. The Interface and Test Board also provides access points
to the radio’s communication port, which enables you to monitor activity with a logic probe,
multimeter, or oscilloscope.
The Interface and Test Board includes the following components and functionality:
• RS-232 interface
• on/off switch
• test points
• power supply
• LED indicators
• standard SIM slot
• microphone/speaker jacks
• FPC cable connector
The following table describes Interface and Test Board components.
Component Description
RS-232 interface The serial (COM) port on a computer, and most terminal devices, operates at RS-232
signal levels, which are typically
±
12V. This high voltage would damage the RIM OEM
Radio Modem for GSM/GPRS Wireless Networks, which is typically integrated into a
device that operates an asynchronous serial port at 3V. The RS-232 interface on the
Interface and Test Board enables you to produce an output from the radio that is easily
interpreted by a computer.
On/off switch When the switch is on, the radio turns on whenever power is applied to the Interface
and Test Board. When the switch is off, the radio turns off. Refer to "Turning on and
turning off the radio" on page 57 for more information.
Test points The Interface and Test Board is more than an RS-232 interface. It provides direct access
to each of the 22 pins on the radio interface cable, which enables connectivity to
analytical equipment, such as a logic probe, multimeter, or oscilloscope, and indicates
real-time data flow.