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Command Descriptions
2–208
TLS 216 Programmer Manual
ANALOGSel displays only the selected waveform in a reference group as the
analog input signal. Use Analog Select mode to measure the actual response of
the selected waveform in a reference group.
BUS displays each waveform in the reference group as one or more of three
digital logic levels defined as HIGH, LOW, or MID. The levels of each
waveform displayed depends on how the instantaneous level of its input signal
compares with two threshold levels you define. Use BusForm mode to measure
the idealized response of waveforms with respect to defined thresholds.
TIMIng displays each waveform in the reference group as one or more of three
digital logic levels, as is done for BusForm. However, unlike BusForm, the logic
scope offsets the ground reference of each waveform so they skew vertically on
screen. Use Timing mode to measure timing relationships between the wave-
forms included in the group.
OFF turns off the display of the selected reference group.
REF3:DISPLAY BUS
sets reference group 3 to BusForm display mode.
REF1:DISPLAY?
might return ANALOG display mode.
REF<x>:FIRst? (Query Only)
Returns the first channel in the specified reference group. Every group includes
the first channel (lowest numbered in the group), the last channel (highest
numbered), and every channel in between.
Vertical
REF<x>:FIRst?
REF
?
<x>
:
FIRst
NR1 the first channel in the group from 1 to 16.
REF4:FIRST?
might return 12, indicating the first channel of reference group 8 is channel
12.
Examples
Group
Syntax
Returns
Examples