I have found with the SA trims to turn the white dial all the way down so you get a good view of the hump. then you want to turn the small metal dial to roll the hump out to 1 ghz. After that you will want to re tweek the white dial. Trims dont fix everything and you might have to go troubleshoot due to another problem like taps or cable. Hope this helps. By the way, sweeping out to 1 ghz sucks.
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