IEEE-488 Reference
3-132
:NTRansition <NRf>
:STATus:MEASurement:NTRansition <NRf> Program Measurement Transition Filter (NTR).
:STATus:QUEStionable:NTRansition <NRf> Program Questionable Transition Filter (NTR).
:STATus:OPERation:NTRansition <NRf> Program Operation Transition Filter (NTR).
:STATus:OPERation:TRIGger:NTRansition <NRf> Program Trigger Transition Filter (NTR).
:STATus:OPERation:ARM:NTRansition <NRf> Program Arm Transition Filter (NTR).
:STATus:OPERation:ARM:SEQuence:NTRansition <NRf> Program Sequence Transition Filter (NTR).
<NRf> = 0 Clear NTR register <NRf> = 128 Set bit B7 of NTR register
1 Set bit B0 of NTR register 256 Set bit B8 of NTR register
2 Set bit B1 of NTR register 512 Set bit B9 of NTR register
4 Set bit B2 of NTR register 1024 Set bit B10 of NTR register
8 Set bit B3 of NTR register 2048 Set bit B11 of NTR register
16 Set bit B4 of NTR register 16384 Set bit B14 of NTR register
32 Set bit B5 of NTR register 65535 Set all bits
64 Set bit B6 of NTR register
:NTRansition? Query NTR register
These commands are used to program the negative transition (NTR) registers. A negative tran-
sition is defined as a 1 to 0 state change in the condition register. Thus, when an event is pro-
grammed for a negative transition, the appropriate bit in the corresponding event register sets
when the corresponding bit in the condition register changes from 1 to 0. For example, if bit B9
of the Negative Transition Register of the Measurement Transition Filter is set, then the buffer
full event is programmed for a negative transition. The BFL bit (B9) in the Measurement Event
Register sets when the trace buffer is no longer full. For details on register structure, see para-
graph 3.7.
The NTR registers are shown in Figures 3-33B through 3-38B. Included is the decimal weight
of each bit. The sum of the decimal weights of the bits that you wish to set is the parameter
(<NRf>) that is sent with the command. For example, to program RAV (B5) and BFL (B9) mea-
surement events for negative transitions, send the following command:
:stat:meas:ntr 544
where; BFL (bit B9) = Decimal = 512
RAV (bit B5) = Decimal = 32
<NRf> = = 544
Effects of negative transitions on the Measurement Event Register:
Negative transition effect on
Measurement event Measurement Event Register
Reading overflow Sets B0 when a reading has gone from overflow to normal.
Low limit 1 Sets B1 when the reading is no longer less than the low limit 1 setting.
High limit 1 Sets B2 when the reading is no longer greater than the low limit 1
setting.
Low limit 2 Sets B3 when the reading is no longer less than the low limit 2 setting.
High limit 2 Sets B4 when the reading is no longer greater than the high limit 2
setting.
Reading available Sets B5 when the next reading is being taken.
Buffer available Sets B7 when the trace buffer has become empty.
Buffer half full Sets B8 when the trace buffer is no longer half full.
Buffer full Sets B9 when the trace buffer is no longer full.
Buffer pretriggered Sets when the trace buffer pretrigger operations are completed.
3.20.
Parameters
Query
Description
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