User's Guide

The Hardware View SB300 Series
Page 82 Proprietary and Confidential 2110059 Rev 1.1
10.3.2. Connectors
See Section 10.2.4 for part number and manufacturer contact details on all connections.
10.3.2.1. Antenna Connector
The SB300 provides an MMCX type RF connector for the antenna connection. For proper
matching the antenna should be 50 ohms with a return loss of 10 dB or better between
824 - 894 MHz. System antenna gain should be 0 dB.
New production units will include support for the future Sierra Wireless booster product. This
support means that extra care is required when connecting the antenna output to test equipment.
CAUTION
In cases where the antenna output is to be connected to test equipment, DC blocks must
be used on the antenna output to protect the test equipment and avoid false booster
detection..
10.3.2.2. Host (DTE) Connector
The SB300 provides a single 30-pin ZIF connector with 0.5mm pin spacing. An appropriate Flat
Flex Cable is required to make the connection to the host.
10.3.3. Power Specifications
The SB300 requires +5V DC provided on pins 23-24, and ground provided on pins 23-28.
Electrical requirements and current specifications are identified below.
Power-up timing for the modem requires that power ramp up at a minimum rate of 0.05 V/ms
within a maximum of 100ms. The ramp up should be graceful and linear (monotonic).
Table 10-1: Power and Current Specifications
Power Supply Requirements
+5V DC ±5%
Maximum noise DC to 100 kHz: 10 mV
pp
Current Drain
Deep Sleep: 12 mA
Sleep: 16 mA
Receive: 150 mA
Transmit (Full Power): 850 mA
Note: Early production units used different internal components and may require 20 mA more
than noted above while in receive modes. The command ATI6 will report the hardware revision.
Units prior to 0062 use the higher current level.
10.3.4. Heat Dissipation
The figures below indicate excess power dissipation beyond that radiated by the antenna.
Table 10-2: Power Dissipation Specifications
CDPD Transmitting at
Maximum Power
3.65 Watts
CDPD Sleep 325 mW
Logic Sleep 110 mW
Logic Deep Sleep 85 mW