Figure 4-14: Magnitude (Db) Vs. Frequency (Hz) Plot; For All 1024 States Of Rxfer[9:0] - Xilinx RocketIO X User Manual

R
Figure 4-14
RXFER[9:0] can be broken out into four groups from the lowest to the highest frequency
ranges. Depending on the bit settings of RXFER[9:0], certain frequency ranges are boosted
in magnitude:
•
•
•
•
These groupings represent cascaded boosting stages; hence, adjusting more than one stage
results in a cumulative response. RXFER[6:4] and RXFER[9:7] control identical cascaded
stages.
Note:
boosted.
106
is a plot of the magnitude frequency response for all 1024 states of RXFER[9:0].
RXFER[3:2] adjusts a boost in the 50 MHz to 200 MHz range (low frequency)
RXFER[1:0] adjusts a boost in the 200 MHz to 1 GHz range (mid frequency)
RXFER[6:4] adjusts a boost in the 500 MHz to 2 GHz range (high frequency)
RXFER[9:7] adjusts a boost in the 500 MHz to 2 GHz range (high frequency)
The frequency ranges do not follow LSB to MSB with regard to which frequency range is

Figure 4-14: Magnitude (dB) vs. Frequency (Hz) Plot

for all 1024 states of RXFER[9:0]

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Chapter 4: Analog Design Considerations
RocketIO™ X Transceiver User Guide
UG035 (v1.5) November 22, 2004