K3655 Pulse Generator

 
The Model 3655 is a single-width CAMAC module containing a 16-bit counter and eight 16-bit set-point registers that are compared with the counter. The comparisons produce output pulses, and any of them can be used to either stop or clear the counter. The comparisons also produce LAM status bits, which can be individually enabled to produce LAM requests.

A flag bit determines whether the counter stops with the last output pulse or whether it is cleared to produce repeating sequences of timing pulses. In the former mode of operation, additional pulse sequences are initiated either by programmed command or by external signal or contact closure.

The 3655 provides its own crystal clock, and the input frequency to the counter is software-controlled for any decade from one hertz to one megahertz. Input to the counter can also come from an external source. Two of the comparisons can set and clear the Inhibit.

Numbers in the eight registers (or fewer, if less than eight pulse sources are required) must be stored in increasing numerical order for proper timing of output pulses.

Two control registers provide programmable control of the clock frequency (one hertz to one megahertz), the number of channels that generate a pulse (one to eight), the assertion of Inhibit, and whether to stop or recycle after the last pulse.

 

Test functions for card

Read card registers and print to status log

Enabled channels will appear in the data read out list with the label that is specified in the dialog for that channel. If an event is triggered, each of the items in the read out list for each triggered channel will be read out.


Event Record

xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx

^^^^ ^^^^ ^^^^ ^^-----------------------data id

                 ^^ ^^^^ ^^^^ ^^^^ ^^^^-length in longs


xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx event count


xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx

        ^ ^^^---------------------------crate

             ^ ^^^^---------------------card


if timestamp included the next two words follow, otherwise nothing. Check the length!

xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx

^^^^ ^^^^ ^^^^ ^^^^ ^^^^ ^^^^ ^^^^ ^^^^-reference date (high part of double)

xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx

^^^^ ^^^^ ^^^^ ^^^^ ^^^^ ^^^^ ^^^^ ^^^^-reference date (low part of double)

Frequency in Hz, or use external clock

Count at which events are triggered

If NOT checked, the card will stop cycling after one event

Set the counter on which to clear or set the inhibit