Figure 5-10 Trigger Event Status - Keithley 7001 Instruction Manual

IEEE-488 Reference
To Waiting for Trigger
Bit (Trig) of Operation
Event Condition Register
(See Figure 5-7).
Figure 5-10
Trigger event status
Trigger Event Transition Filter — The transition filter is
made up of two 16-bit registers that are programmed by the
user. It is used to specify which transition (0 to 1, or 1 to 0)
of bit B1 in the Trigger Condition Register will set bit B1 in
the Trigger Event register.
The filter can be programmed for positive transitions (PTR),
negative transitions (NTR) or both. When an event bit is pro-
grammed for a positive transition, the event bit in the Trigger
Event Register will set when the corresponding bit in the
Trigger Condition Register changes from 0 to 1. Conversely,
5-16
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Always
Zero
(B15)
(B14 - B2)
0
(B15)
(B14 - B2)
0
(B15)
(B14 - B2)
0
&
OR
(B15) (B14 - B2)
Seq 1 = Sequence 1 (Set bit indicates that the
7002 is in the Trigger Layer)
& = Logical AND
OR = Logical OR
PTR = Positive Transition Register
NTR = Negative Transition Register
when programmed for a negative transition, the bit in the sta-
tus register will set when the corresponding bit in the condi-
tion register changes from 1 to 0.
The transition filter registers can be set or cleared by using
the following SCPI commands:
Seq1
Trigger Event
Condition Register
(B1) (B0)
Seq1 PTR
Trigger Event
Transition Filter
(B1) (B0) NTR
Seq1
Trigger Event
Status Register
(B1) (B0)
&
Seq1
Trigger Event Status
Enable Register
(B1) (B0)
:STATus:OPERation:TRIGger:PTRansition <NRf>
:STATus:OPERation:TRIGger:NTRanstion <NRf>