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                48.1    GENERAL DESCRIPTION  . . . . . . . . . . . . . .  48-1
                48.2    SLAM MODULE DESCRIPTION  . . . . . . . . . . . .  48-1
                48.3    MODULE FUNCTION CODES  . . . . . . . . . . . . .  48-1
                48.4    MODULE WIDTH . . . . . . . . . . . . . . . . . .  48-2
                48.5    SIGNAL LEVELS  . . . . . . . . . . . . . . . . .  48-2
                48.6    FRONT PANEL  . . . . . . . . . . . . . . . . . .  48-2
                48.6.1    Front Panel Indicators . . . . . . . . . . . .  48-2
                48.6.2    Front Panel Connectors (J1 Through J5) . . . .  48-2
                48.7    DRAWING PACKAGE NUMBER . . . . . . . . . . . . .  48-2
                48.8    RESPONSIBLE ENGINEER . . . . . . . . . . . . . .  48-2

                                      CHAPTER 48
                               SLC LAM GENERATOR(SLAM)

        48.1  GENERAL DESCRIPTION

        The SLC Lam generator is designed to allow the  generation  of  a  LAM
        from  a NIM level trigger, such as is generated from the Simple Timing
        Buffer.  When enabled, the LAM state is generated  immediately  (10-30
        nS)  following the leading edge of the trigger pulse.  A retriggerable
        lockout is automatically imposed, blinding the  module  to  subsequent
        triggers until a 2 mS interval is acheived.

        48.2  SLAM MODULE DESCRIPTION

        The  SLAM  module  internally  consists  of  the  following   descrete
        elements:
              o  An input receiver and timeout section.
              o  A "LAM State" latch which is set on the receipt  of  a  valid
                 trigger pulse.
              o  A "LAM Enable" latch which allows the propagation of the  LAM
                 state to the CAMAC backplane.
              o  Assorted CAMAC interface logic.
        When a trigger is received, the LAM STATE is generated.   If  ENABLED,
        the  LAM  line  is pulled by the module.  The LAM is typically cleared
        with either a) F10 -- Clear LAM State, or b) F11 -- Test and Clear LAM
        State.
        Testing and clearing of the LAM State is allowed  independent  of  the
        LAM Enable state.

        48.3  MODULE FUNCTION CODES

        The CAMAC functions accepted by the SLAM Module are as follows:
         



        SLC LAM GENERATOR(SLAM)                                      Page 48-2

            Function       Description                Q         X
             Code                                  Response  Response
            ---------------------------------------------------------
         
             F8*A0      Test Lam  (LAM Line)         Q=LAM      1
             F10*A0     Clear LAM State              0          1
             F11*A0     Test & Clear (F8,F10)        Q=LAM      1
             F24*A0     Disable Lam Enable           0          1
             F26*A0     Enable Lam Enable            0          1
             F27*A0     Test Lam State               Q=State    1
             Z*S2       Init module (Enable is disabled)

        48.4  MODULE WIDTH

        Single.

        48.5  SIGNAL LEVELS


        48.6  FRONT PANEL

        Trigger Input is Standard NIM, minimum pulse width 50 nS.

        48.6.1  Front Panel Indicators

              o  Power -- is power on?
              o  X
              o  Q
              o  LAM

        48.6.2  Front Panel Connectors (J1 Through J5)


        48.7  DRAWING PACKAGE NUMBER

        233-016

        48.8  RESPONSIBLE ENGINEER

        Mike Browne, Henry Tunis