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Integrator’s Reference Manual
7-6 80-99208-1 Rev. D
Modem Dimensions and Weight
Modem dimensions are 190 x 75 x 17 millimeters (7.48 x 2.95
x 0.68 inches).
Modem weight is less than 180 grams (6.3 ounces).
Modem Antenna Connectors
The GSP-1620 modem has two (2) MCX snap-in connectors
for the antenna leads, connecting the DRA antenna to the
modem:
• Transmit (Tx) lead is labeled J3.
• Receive (Rx) lead is labeled J7.
Caution
When you connect antenna cables, be careful to connect the Tx
connector on the antenna to the Tx connector (J3) on the modem, and
the Rx connector on the antenna to the Rx connector (J7) on the
modem. Crossing the Tx and Rx cables can damage the modem.
Caution
The MCX connectors are secured only by a solder joint and are not
designed to withstand excessive force. When cables are connected to
these connectors, care must be taken to ensure adequate strain relief is
provided.
Data and Control Ports
The Data and Control ports are combined into a single DB-25
male upright connector, which provides the primary user
interface:
• The connector contains two (2) 9-pin serial ports, DC
power leads, and a reset lead.
• Line speed for the Data port is variable between 300 bps
and 115.2 kbps. (This is different from the over-the-air
Data port rate, which is 9600 bps.)
• Line speed for the Control port is fixed at 9600 bps.
• Signaling uses 8 bits, no parity and 1 stop bit (8,N,1).
• All ports are ESD and short-circuit protected.