Cronologic Ndigo Crate Uživatelská příručka stáhnout pdf (Strana 12)

analog_offset[4]

-1,0V

1,0V

Figure 2.8: For TRIGGER and GATE negative thresholds can be set to support negative signals

such as 16mA NIM.

TDC on Input TRIGGER

There is a TDC connected to the input TRIGGER. When used with the TDC, input TRIGGER

supports negative pulses only and analog oﬀset[4] must be negative. The TDC creates packets

of type 8. These packets ﬁrst contain a coarse timestamp and a payload that can be used to

calculate the trigger position with higher precision. The function ndigo process tdc packet() can

be used to replace the coarse timestamp with the precise timestamp. This function is described

in section 3.5 on page 39. TDC pulses must have a minimum duration of 3.3ns. The dead-time

of the TDC is 32ns.

2.3 Extension Card

This Option is only available for the Ndigo5G-10.

cronologic GmbH & Co. KG 8 Ndigo250M-14 User Guide

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Cronologic Ndigo Crate Uživatelská příručka Strana 12