1.6
XPIC Receiver
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EVM Circuit Overview
The TRF2443 provides an auxiliary receiver chain that can be used for cross-polarization interference
cancellation purposes. The EVM is configured for a single-ended output signal (intended for the secondary
XPIC RX path) at J33 (XPICOUT). The input to the XPIC receiver (from the XPICOUT of the secondary
XPIC RX path) is available at SMA connector J32 (XPICIN). This input is taken through a 1:1.5 balun to
provide differential inputs to the device. The device presents 75 so no external termination resistor is
required. The XPIC baseband I and Q signals can be measured balanced or unbalanced. The I output is
taken from the unbalanced port J16 (XPICI) through balun T6 or from the balanced ports of J14 (I+) and
J19 (I-). Likewise, the Q output is taken from the unbalanced port J25 (XPICQ) through balun T8 or the
balanced ports of J22 (Q+) and J27 (Q-). For balanced mode measurements, jumpers W4, W6, W8, and
W10 must be removed (see
Figure 9
).
Figure 9. XPIC RX
SLWU065 – September 2009
List of Tables
9
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