DBS9900 User’s Manual
DBS9900 Registers
6-9
82-28993 Revision 01
D11
BP_TRIG1IN3
1100 = TTL4, 1101 = TTL5, 1110 = TTL6, 1111 = TTL7
D12
BP_TRIG1OUT0
D13
BP_TRIG1OUT1
D14
BP_TRIG1OUT2
D15
BP_TRIG1OUT3
Module B Trigger Output Select
0000 = Not driving Trigger, 0110 = ECL0, 0111 = ECL1,
1000 = TTL0, 1001= TTL1, 1010 = TTL2, 1011 = TTL3,
1100 = TTL4, 1101 = TTL5, 1110 = TTL6, 1111 = TTL7
6.9 Trigger Mode Control Register
The Trigger Mode Control Register (0x0E) is used to set the trigger mode for modules A and B.
Gate mode / Edge mode and trigger polarity is set for each module as well as a software
(register) trigger bit. The software trigger bit will not have any effect unless the trigger input field
of the Trigger source register is set to 0x0. The SOFT_TRIG function is not affected by the
SLOPE bit. It is always high true regardless of the level of the SLOPE bit.
A Software Advance function is also provided that can be used to Advance to the next segment
or to Branch to the Start Segment. To enable this bit, the front panel Advance input must be a
logic high level or left disconnected. To enable the Advance from the front panel, this bit must be
in the logic low state.
Table 8 -
Trigger Mode Register– R/W (0xE)
Name
Description
D0
GATE_ENA_A
0 = Edge trigger, 1 = gated trigger (start / stop)
D1
SLOPE_A
0 = falling edge trigger or low true gate trigger
D2
SOFT_TRIG_A
0 = inactive, 1 = trigger
D3
GATE_ENA_B
0 = Edge trigger, 1 = gated trigger (start / stop)
D4
SLOPE_B
0 = falling edge trigger or low true gate trigger
D5
SOFT_TRIG_B
0 = inactive, 1 = trigger
D6
SOFT_ADV_A
0 = inactive, 1 = Advance (Branch)
D7
SOFT_ADV_B
0 = inactive, 1 = Advance (Branch)
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