LeCroy 8901A Operator's Manual page 15

Operating Instructions
A service request by the 8901A will be cleared after the con
troller reads the status byte. However, if the request was caused
by a LAM, a service request will immediately be issued again
unless SRQ on LAM is disabled in the 8901A or the LAM is
cleared in the instrument(s) asserting it. It is important to note
that the 8901A cannot execute any CAMAC commands while
any service request is pending.
PROGRAMMING CAMAC
MODULES
Commands Common
to All Instruments
Table 2 - Service Request Response Commands
Disable all SRQ's
Enable SRQ on occurrence of LAM
Enable SRQ on occurrence of Q=0
Enable SRQ on occurrence of X=0
Enable SRQ on occurrence of LAM or Q=0
Enable SRQ on occurrence of LAM or X=0
Enable SRQ on occurrence of Q=0 or X=0
Enable SRQ on occurrence of LAM, Q=0, or X=0
NOTE: All of these commands deassert inhibit
Single byte commands - values specified in decimal
with hex value given in ()
64
(40)
65
(41)
66
(42)
68
(44)
67
(43)
69
(45)
70
(46)
71
(47)
The 8901A can be programmed to generate clear (C), initialize
(Z), or inhibit (I) signals on the Dataway when a CAMAC cycle
is executed. These commands operate on all instruments in the
mainframe without any further addressing. The clear and in
itialize signals will be turned on only during the first CAMAC
cycle executed after the 8901A received that command. The
inhibit line will remain asserted until the 8901A is programmed
to deassert it. Caution - changing the inhibit line will affect the
state of the service request response programming.
Table 3 lists the 8901A commands to perform these functions.
Table 3 - CAMAC Commands
Send initialize (Z)
Send clear (C)
Send clear and initialize
Assert inhibit (I)
Deassert inhibit (also disables SRQ's)
Single byte commands - values specified in decimal
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