Mid Frequency Boosting; Figure 4-16: Magnitude (Db) Vs. Frequency (Hz) Response; For Four Settings Of Rxfer[1:0] - Xilinx RocketIO X User Manual

R
Chapter 4: Analog Design Considerations

Mid Frequency Boosting

RXFER[1:0] adjust a boost in the 200 MHz to 1 GHz range.
Figure 4-16 is a plot of the magnitude frequency response for RXFER[1:0], while the other
8 bits are all 1s. RXFER[9:0] = 1111111XX
In this case, however, the frequency steps follow LSB to MSB, i.e., RXFER[1] is higher
weight than RXFER[0]. Hence, the boost of the transfer function is set at low to high
frequencies by the bits RXFER[1:0] = 00, 01, 10 and 11, respectively.
ug035_ch4_16b_111003

Figure 4-16: Magnitude (dB) vs. Frequency (Hz) Response

for Four Settings of RXFER[1:0]

108 www.xilinx.com RocketIO™ X Transceiver User Guide
1-800-255-7778 UG035 (v1.5) November 22, 2004