Surface Concept Preamplifier-CFD, Руководство пользователя

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Preamplifier-CFD Manual
4.2 Input/Output Features
Preamplifier Input Signal:
Polarity of Input Signal:
Impedance:
4.2.1 Input Features
2mV - 1V (BNC)
(depending on gain setting)
negative or positive (switchable)
50Ohm
CFD Output Signal per Channel:
Pulse Width of Output Signal (typ.):
Monitor Output:
4.2.2 Output Features
1 LVTTL (BNC), 1 NIM (LEMO)
2.4 (LVTTL), 3ns (NIM)
1 analogue (BNC)
Input Signal Frequency (max.):
CFD Jitter (max.):
CFD Walk (typ.):
Device propagation delay (typ.):
4.2.3 Measurement Parameters
40MHz
20ps
< 40ps (for 20dB amplitude range and while
ambient temperature varies less then 5K)
6.5ns
4.3 CFD Adjustment
The CFD Threshold can be adjusted manually by turning the corresponding potentiometer (marked “Th”
on the front panel). The threshold is getting more sensitive when turning the potentiometer clockwise. It
can be monitored on the corresponding sockets (no. 13 & 14) on the front panel (see Figure 1 & 2 ).
4.3.1 Adjustment of CFD Threshold
The Zero Offset can be adjusted by turning the corresponding potentiometer (marked “Z” on the front
panel). The Zero Offset is getting more positive when turning the potentiometer clockwise. It can be
monitored on the corresponding sockets (no. 12 & 14) on the front panel (see Figure 1 & 2 ).
4.3.2 Adjustment of Zero Offset