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XBee Series 2 ZigBee OEM RF Modules v1.x2x [2007.07.019]
USB Development Board
External Interface
Figure D‐02. Front View
B‐11b.
RSSI LEDs
B‐11a.
I/O & Power LEDs
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Serial Loopback Adapter
Part Number: JD2D3-CDL-A (Red, DB-9 M-F) The serial loopback adapter is used for range
testing. During a range test, the serial loopback adapter configures the module to function as a
repeater by looping serial data back into the radio for retransmission.
Figure D‐01. Serial loopback adapter and pinouts
B-11a. I/O & Power LEDs
B‐11c.
USB Port
B-11b. RSSI LEDs
B-11c. USB Port
B-12a. DIP Switch
© 2007 Digi International, Inc.
LEDs indicate RF module activity as follows:
Yellow (top LED) = Serial Data Out (to host)
Green (middle) = Serial Data In (from host)
Red (bottom)
= Power/Association Indicator (Refer to the D5
(DIO5 Configuration) parameter)
RSSI LEDs indicate the amount of fade margin present in an active
wireless link. Fade margin is defined as the difference between the
incoming signal strength and the module's receiver sensitivity.
3 LEDs ON
= Very Strong Signal (> 30 dB fade margin)
2 LEDs ON
= Strong Signal (> 20 dB fade margin)
1 LED ON
= Moderate Signal (> 10 dB fade margin)
0 LED ON
= Weak Signal (< 10 dB fade margin)
Standard Type-B OEM connector is used to communicate with OEM
host and power the RF module.
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Development Guide
74
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