DESCRIPTION

The LeCroy 3588 Histogramming Memory Module is an MCA module that is used in spec with the LeCroy 3512 Spectroscopy ADC module. The 3588 is chosen in the config file as

CA_LC3588 = slot_number

The module can be hardware configured for either 16K of 24-bit wide channels or 32K of 12-bit wide channels. spec currently only supports the first configuration.

FUNCTIONS

mca_get(g, e)

gets data from currently selected group on the 3588, and transfers it to element e of spec data group g.

mca_put(g, e)

writes data to the currently selected group on the 3588, taking it from element e of spec data group g.

mca_par("clear")

clears the channels of the current group.

mca_par("run")

starts acquisition. Note that the tcount() and mcount() functions (used in the counting macros) will also start acquisition.

mca_par("halt")

stops acquisition. Note that the 3588 will also be halted when the tcount() and mcount() functions (used in the counting macros) complete their count intervals or are aborted.

mca_par("group_size")

returns the current group size.

mca_par("group_size", size)

sets the group size to size. Legal values are 256, 512, 1024, 2048, 4096, 8192 and 16384.

mca_par("select_group")

returns the currently active group. Groups are numbered starting at zero.

mca_par("select_group", group)

set the active group to group. Groups are numbered starting at zero. The number of possible groups depends on the group size. If group is greater than the maximum number of groups, the current group is set to group modulus the maximum number of groups.

mca_par("readone", channel)

returns the contents of channel number channel. The channel number is with respect to the current group.

mca_par("chan#")

returns the contents of channel number #. The channel number is with respect to the current group.

mca_par("chan#", value)

sets channel # to value. The channel number is with respect to the current group.