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User name Nuruzzaman

Log entry time 13:57:16 on July 14, 2010

Entry number 195730

Followups:

keyword=Beam modulation readouts

Attached figure is the screenshot of beam modulation readout GUI. Channels those are working fine are Channel # 1, 2, 4, 5, 6, 7, 8, 10. The readouts from VME function generator are looks perfect (Channels 5-10). Readouts from LEMs (Channels 1-4) are consistent but almost factor of 4 off than nominal. Channel 3 for LEMY1 is not showing any readback. I didn't tired to test energy channel (Channel 9), it can affect other halls. We will continue testing for next couple of hours.

N.B: I set 0.15 A for FGX1 and FGX2, 0.30 A for FGY1 and FGY2. Ramp wave is 1.0 V. The # of cycle is 511(contineous). Frequency set to 125 Hz for all the channels.



A copy of this log entry has been emailed to: higgins@jlab.org, mack@jlab.org, philip@jlab.org



Figure 1