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This guide covers diagnosing and resolving problems related to high threshold scans on the AR2FS module, including chip-specific issues and frequency plot analysis. Instructions for conducting temp and voltage tests are included.
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AR2FSJuly 22, 2004 Anton, Campion, Mitch
Status A Single AR2FS board has been stuffed at Penn. chip 1 - channel 9 (low gain)chip 3 - ch 15, 13, 11 (low gain) ch 1 (low offset).chip 6 - odd testpulse 10 counts smaller in magnitudechip 8 (rod 0) - ch 14 offset 15-20 cnts higher threshold. chip 13 - no odd testpulse. High threshold ramping reveals the same problem.
2FS Frequency Plot from THRATE @#1 @#3 LowThr Offset Low Thr Offset Normal No Gain
300 KhZ Noise AR2FS On Bench On Module
TPScan all Locations 10 cntson Bench Test Pulse Odd Channels Test Pulse Even Channels
TPScan 10 Cnts On Module Even Channels Odd Channels
High Threshold Scan Internal Test Pulse 58 Low Time Bins with High Threshold On
AR2FS High Threshold Scan Even Channels Odd Channels ?
AR2FS High Threshold Scan On Module Even Channels Odd Channels ?
Temp and Voltage Tests • Vdd=2.10V • Chip Temp Vdd Vcc=3V Vee=-3V • 1** 132 163 255 132 • 2 129 162 256 255 • 3 128 161 256 255 • 4 128 162 256 255 • 5 129 163 256 255 • 6 128 161 256 255 • 7 127 160 256 255 • 8 130 162 256 255 • 9 129 161 256 255 • 10 131 163 256 255 • 11** 130 163 253 131 • 12 129 163 256 255 • 13 128 160 256 255 • 14 130 162 256 255 • 15 ** 129 161 233 130
