V830

The CAEN Mod. V830 is a 1-unit wide VME 6U Multievent Latching Scaler, housing 32 independent counting channels. Each channel has 32 bit counting depth and accepts either ECL or LVDS inputs, depending on the purchased version; the maximum input frequency is 250 Mhz. The counters’ values can be read on the fly from VME without interfering on data acquisition process. The model V830 is equipped with a 32 k x 32 bit multievent buffer memory which may be used to store and readout accumulated data during subsequent counting. The Trigger signal can be provided by an external NIM/ECL signal or by a VME request. It is also possible to generate a periodical Trigger signal by means of an internal programmable timer. The module features VETO and CLEAR ECL inputs and a TEST NIM input (in common for all channels).

The model V830 works in A24/A32 mode and data transfer occurs in D32, BLT32 or MBLT64 mode. The unit also supports the Chained Block Transfer (CBLT32/CBLT64) and the Multicast commands. The board has a special circuitry that allows it to be removed from and inserted in a powered crate without switching the crate off.