User's Manual

1323x-Modular Reference Board
1323x Development Hardware Reference Manual, Rev. 1.0
3-6 Freescale Semiconductor
Figure 3-3. 1323x-MRB Block Diagram
3.2.1 RF Performance and Considerations
The MC1323x transceiver includes a low noise amplifier, 1mW nominal output power, PA with internal
voltage controlled oscillator (VCO), integrated transmit/receive switch, on-board power supply regulation,
and full spread-spectrum encoding and decoding.
• Nominal output power is 0 dBm, with +3 dBm max
• Typical sensitivity is -93 dBm
• Frequency range is 2405 to 2480 MHz
• Typical range (outdoors, line of sight) is 130 meters
The 1323x Modular Reference Board utilizes a minimum number of components while providing good
RF performance:
• Uses a minimum number of RF matching components and external 50:100 balun
• “F” printed metal antenna for a small footprint, low cost design
An external 50 (unbal):100 (bal) balun connects a single-ended 50-Ω port to the differential RF port of the
MC1323x radio. The layout has provision for out-of-band signal suppression (components L2 and C7) if
required. Also note that control pin CT_Bias switches reference voltage to the balun as required for TX
(CT_Bias = 1.5V) or RX (CT_Bias = ground).
The default RF mode is use of the “F” antenna coupled through 10 pF C3 to the single-end RF port. An
alternative mode is to connect an SMA RF connector (not provided; must be mounted). This is useful for
connected measurements to test radio performance.
NOTE
See the MC1323x Data Sheet and Reference Manual for more RF design
information.
32 MHz
32.768
KHz
MC13233
QFN
BDM
Debug
Port
CMT
GPIO
SPI
IR
Blaster
LED
2 Mbit
Serial
FLASH
Reset
Button
GPIO
Headers
J2 & J3
Optional
SMA
Conn
F-Ant
Power
Manage-
ment