Cornelius DPC 230 Specifications download pdf (Page 28)

22 Typical Applications

The right part of the panel shows the discriminator parameters of the CFD inputs and the TDC

parameters. The optimal discriminator settings depend on the detectors; the parameters shown

are typical of the bh PMC-100 module. The TDC parameters contain the time-channel width,

the number of time channels, and the time range of the recording. Moreover, the curves can be

shifted in time by applying an offset to the TDC times.

Fig. 27: System parameters for fluorescence decay measurement

The input configuration button opens the panel shown in Fig. 28. Both CFD channels of both

TDCs are activated. CFD 1, 2, and 3 are used as detector inputs. CFD number four is used as a

reference input for the laser pulses.

Fig. 28: Input configuration for TCSPC with up to three PMT detectors

The display of the curves is controlled by the trace parameters and display parameters, see Fig.

29. The trace parameters define which curves are to be displayed, and assign different colours

to the individual curves. The trace parameters shown in Fig. 29, left, display the data recorded

by a detector connected to channel 1, i.e. CFD 1. Curves of several measurements can be re-

corded into subsequent ‘pages’ of the data memory. The trace parameters shown display the

curves recorded into page 1 and page 2.

The scale of the display and other details of the display are defined in the display parameters,

see Fig. 29, right. A linear scale was selected, and the autoscale function was turned on. Two

decay curves recorded and displayed with the settings of Fig. 27 through Fig. 29 are shown in

Fig. 30.

1 2 ... 23 24 25 26 27 28 29 30 31 32 33 ... 69 70

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Cornelius DPC 230 Specifications Page 28