Another analyst has cut revenue estimates for Motorola Mobility, again citing poor sales of the company’s key products as the driving force behind the downward revision. Pacific Crest analyst James Faucette on Tuesday revised his full-year 2011 revenue estimates downward from $13.7 billion to $12.25 billion. Further emphasizing his position on Motorola, he revised his full-year 2012 revenue estimates down from $15.34 billion to $13.62 billion as well. “Based on our checks, we believe overall sell-through trends for of the Xoom and Atrix have been disappointing,” Faucette said in a note to investors. “In particular, we believe Atrix’s lower-than-forecast volumes are a result of the $49 iPhone 3GS and the HTC Inspire, which kept Atrix sales well below forecast in spite of the marketing focus put on the Atrix by AT&T.” Faucette’s note follows a similar note from RBC Capital Markets analyst Mark Sue last Friday, in which he cut Motorola sales estimates for both the first and second quarters of 2011.