DESCRIPTION

The CR116 is a 16 channel very high speed coinci- dence latch in a single width CAMAC module. Each channel is capable of responding to a coincidence over- lap o f 1 nsec between the leading edge of the data signal and a common strobe input. Detected coincidences set high speed latches which may then be read out on the Dataway on command. The stroke also sets the LAM status flip stop.

All inputs are standard 50 ohm NIM logic levels implemented with high speed ECL integrated circuits. To eliminate rate effects, the unit is entirely DC coupled and all inputs provide a high degree of protection against overload and low reflections.

A front panel clear input is provided to reset the data registers and LAM Status from an external source..

APPLICATION

This module is primarily used in high energy nuclear physics for pattern recording of hodoscope and spark chamber arrays.

FEATURES

* 16 channels in single width module,
* Minimum overlap time: 1 nsec.,
* Pulse - pair resolution > 10 nsec.,
* Standard NIM logic levels, D C-coupled,
* LED displays for N, L, and L Enable.

MECHANICAL         Single width unit, fully shielded,
                   Weight 1 lb., 8 oz.,
                   Operating temperature, 0-500 C at less than 80%
                      humidity,

ELECTRICAL        'Input Current Thresholds--NIM levels,
                   Input Impedance--50 Ohms,
                   Power Requirements--*6 Volts,
                                          6.7 Watts,

SIGNAL             Double pulse resolution,  10 nano seconds,
                   Time slewing of coincidence circuit, 1 nano second,
                     for NIM inputs between -12 and -36 Usec.
                   Relative simultaneity of Data inputs:  200 ps.
                   Simultaneity of Data and Strobe inputs:  1 usec.

FRONT PANEL        16 data inputs,
                   1 gate input,
                   1 clear input,
                  .All inputs  via  LEMO  Connectors,
                   LED displays  for  N,  L and L Enable.

CAMAC
  COMMANDS         NA(O)F(O)      Read  Data  Registers,
                   NA(O)F(2)      Read  Data  Registers;.Reset  the  Data,
                                    and  LAM  registers on S2,  Q=1
                   NA(O)F(8)      Test  LAM                    Q=1 if  set
                   NA(15)F(8)     Test  LAM                    Q=1 if  set
                   NA(O)F(9)      S2  Clear  Data and LAM
                                    registers                  Q=1.
                   NA(O)F(10)     Clear   LAM                  Q=1
                   NA(O)F(24)     Disable LAM,                 Q=1,
                   NA(O)F(25)     Sl Set all data registers
                                   & the LAM register to 1,    Q=1,
                   NA(O)F(26)     Enable LAM,                  Q=1,
                   NA(O)F(27)     Test LAM status,             Q=1, if set
                   NA(13)F(27)    Test LAM Enable status,      Q=1 if set