CAMAC COMMANDS
N F(O) A(O):
Reads back the contents of the MASK register (R1-R16), channel one of
the discriminator is associated with bit R1 (0, X response =1).
N F(O) A(1):
Reads the contents of the internal DATA LATCH (R1-R16). X is always returned
=1, but Q=1 only if a SYNC input occurred since the last read DATA LATCH
command. (N F(O)A(1) Channel one is associated with bit R1. A bit = l means
the associated channel was active when SYNC pulse occurred.
N F(1) A(O):
Reads back the contents of the internal DAC threshold register (R1-R1O).
(Q and X response always returned = 1). The internal DAC controls the threshold
of the unit only when the unit is in the REMOTE mode. The DAC register can
be read back independent of the mode of the unit.
N F(1) A(1):
Reads the current threshold level and status (independent of the mode
of the 7106), R1-R1O, R14-R16, 0 and X response always =1.
R1-R1O: ADC reading,-1 mV/bit conversion gain
R14: Reflects the state of the SYNC input at the time the
N F(1) A(1) command executes.
1 = No SYNC present,
0 = SYNC is present.
R15: 1 = Time-Over-Threshold mode in effect.
0 = UPDATE mode is in effect.
R16: 1 = LOCAL mode is in effect
0 = REMOTE mode is in effect
In addition to returning the threshold level and status, another conversion
is automatically started at S2 time. The user should wait at least 500uSec
following major DAC threshold changes before reading the threshold with the
N F(1) A(1) command. The N F(17) A(1) command can be used to start an ADC
cycle.
N F(16) A(O):
Writes into the MASK register (W1-W16), always returns Q and X equal
to one. The contents of the MASK register have affect only when the 7106
is in the REMOTE mode of operation. When in REMOTE, writing a zero into a
bit position will disable the channel associated with that bit. (Channel
one is associated with W1, channel with W16.) The MASK register may be written
into and read out independent of the mode of the 7106.
N F(17) A(0):
Writes into the internal Threshold DAC register (W1-W10), always returns
Q and X equal to one. The Threshold DAC only controls the threshold level
of the unit while the 7106 is in the REMOTE mode of operation. The conversion
gain is -(1OmV+ 1 mV/bit), which spans -10mV to -1.033 Volts. The Threshold
DAC register may be written into or read out independent of the mode of operation
of the 7106. Allow 1 msec settling time for DAC changes greater than 10%
of full scale.
N F(17) A(1):
Starts a Threshold ADC cycle, always returns Q and X equal to one. The
ADC cycle lasts 60uSEC max. Note that the read Threshold command also starts
a new conversion at S2 time.
N F (24) A(O):
Clears the internal mode bit at Sl Time. If the front panel control
CAMAC/LOCAL is in the CAMAC position then clearing the internal mode bit
will force the 7106 into the LOCAL mode of operation. Always returns Q and
X equal to one.
N F(25) A(O):
Generates a test input to all channels not MASKED off if the 7106 is
in the REMOTE mode of operation. If the unit is in LOCAL then no test cycle
is initiated. X is always returned equal to one, but Q is returned equal
to one only if a test cycle was generated.
N F(26) A (O):
Sets the internal mode bit at S1 time. If the front panel control CAMAC/LOCAL
is in the CAMAC position then setting the internal mode bit will force the
7106 into the REMOTE mode of operation. If the control is in LOCAL, the unit
remains in LOCAL (the internal mode bit is still set, but it does not change
the mode of the unit). Always returns Q and X equal to one.)
N F(27) A(O):
Returns Q=1 if the unit is in REMOTE else Q=0. X is always returned equal
to one.
Z:
Upon receipt of the Z at S2 time, the following actions take place. The
internal mode bit is cleared. (Insures LOCAL mode is in effect) The MASK
register is loaded with all ones. The Threshold DAC is set to -1.033 volts.